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description Publicationkeyboard_double_arrow_right Article , Journal 2019Publisher:MDPI AG Authors: Mohammad Mominur Rahman; Kashif Irshad; Mohammad Mizanur Rahman; Hasan Zahir;Heat energy storage systems were fabricated with the impregnation method using MgO and Mg(OH)2 as supporting materials and polyethylene glycol (PEG-6000) as the functional phase. MgO and Mg(OH)2 were synthesized from the salt Mg(NO3)·6H2O by performing hydrothermal reactions with various precipitating agents. The precipitating agents were NaOH, KOH, NH3, NH3 with pamoic acid (PA), or (NH4)2CO3. The result shows that the selection of the precipitating agent has a significant impact on the crystallite structure, size, and shape of the final products. Of the precipitating agents tested, only NaOH and NH3 with PA produce single-phase Mg(OH)2 as the as-synthesized product. Pore size distribution analyses revealed that the surfaces of the as-synthesized MgO have a slit-like pore structure with a broad-type pore size distribution, whereas the as-synthesized Mg(OH)2 has a mesoporous structure with a narrow pore size distribution. This structure enhances the latent heat of the phase change material (PCM) as well as super cooling mitigation. The PEG/Mg(OH)2 PCM also exhibits reproducible behavior over a large number of thermal cycles. Both MgO and Mg(OH)2 matrices prevent the leakage of liquid PEG during the phase transition in phase change materials (PCMs). However, MgO/PEG has a low impregnation ratio and efficiency, with a low thermal storage capability. This is due to the large pore diameter, which does not allow MgO to retain a larger amount of PEG. The latent heat values of PEG-1000/PEG-6000 blends with MgO and Mg(OH)2 were also determined with a view to extending the application of the PCMs to energy storage over wider temperature ranges.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 119 citations 119 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2024Publisher:Springer Science and Business Media LLC Authors: Krishnamurthy, Mathivanan; Abdulwahed Fahad, Alrefaei; Loganathan, Praburaman; Rajesh, Ramasamy; +3 AuthorsKrishnamurthy, Mathivanan; Abdulwahed Fahad, Alrefaei; Loganathan, Praburaman; Rajesh, Ramasamy; Prithiva, Nagarajan; Eerla, Rakesh; Ruiyong, Zhang;pmid: 38849628
In this study, the freshwater microalgae Selenastrum sp. was assessed for the effective degradation of pyrene and simultaneous production of biodiesel from pyrene-tolerant biomass. The growth of algae was determined based on the cell dry weight, cell density, chlorophyll content, and biomass productivity under different pyrene concentrations. Further, lipids from pyrene tolerant culture were converted into biodiesel by acid-catalyzed transesterification, which was characterized for the total fatty acid profile by gas chromatography. Increased pyrene concentration revealed less biomass yield and productivity after 20 days of treatment, indicating potent pyrene biodegradation by Selenastrum sp. Biomass yield was unaffected till the 20 mg/L pyrene. A 95% of pyrene bioremediation was observed at 20 days of culturing. Lipid accumulation of 22.14%, as evident from the estimation of the total lipid content, indicated a marginal increase in corroborating pyrene stress in the culture. Fatty acid methyl esters yield of 63.06% (% per 100 g lipids) was noticed from the pyrene tolerant culture. Moreover, fatty acid profile analysis of biodiesel produced under 10 mg/L and 20 mg/L pyrene condition showed escalated levels of desirable fatty acids in Selenastrum sp., compared to the control. Further, Selenastrum sp. and other freshwater microalgae are catalogued for sustainable development goals attainment by 2030, as per the UNSDG (United Nations Sustainable Development Goals) agenda. Critical applications for the Selenastrum sp. in bioremediation of pyrene, along with biodiesel production, are enumerated for sustainable and renewable energy production and resource management.
Environmental Geoche... arrow_drop_down Environmental Geochemistry and HealthArticle . 2024 . Peer-reviewedLicense: Springer Nature TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s10653-024-02012-4&type=result"></script>'); --> </script>
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more_vert Environmental Geoche... arrow_drop_down Environmental Geochemistry and HealthArticle . 2024 . Peer-reviewedLicense: Springer Nature TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s10653-024-02012-4&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Dataset 2022 Saudi ArabiaPublisher:Zenodo Kohler, Tyler J; Fodelianakis, Stilianos; Michoud, Gregoire; Ezzat, Leïla; Bourquin, Massimo; Peter, Hannes; Busi, Susheel Bhanu; Pramateftaki, Paraskevi; Deluigi, Nicola; Styllas, Michail; Tolosano, Matteo; Staercke, Vincent; Schön, Martina; Brandani, Jade; Marasco, Ramona; Daffonchio, Daniele; Wilmes, Paul; Battin, Tom J.;handle: 10754/686881
Two datasets supporting the publication, "Glacier shrinkage will accelerate downstream decomposition of organic matter and alters microbiome structure and function" in Global Change Biology. DATA S1 Detailed metadata for sampled glacier-fed streams, including sample date and time, GPS coordinates, elevation, physical streamwater measurements, glacier characteristics, nutrient chemistry, and a column indicating samples used in metagenomics analyses. DATA S2 Full patch-level dataset of extracellular enzyme activities (nmol h-1 g-1 DM sediment) and chlorophyll a (µg chlorophyll a g-1 DM).
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You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5281/zenodo.6367068&type=result"></script>'); --> </script>
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more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Dataset 2024Publisher:Zenodo Authors: Tran, Thao Linh; Ritchie, Elizabeth A.; Perkins-Kirkpatrick, Sarah E.; Bui, Hai; +1 AuthorsTran, Thao Linh; Ritchie, Elizabeth A.; Perkins-Kirkpatrick, Sarah E.; Bui, Hai; Luong, Thang M;This dataset contains the data used in the analyses for the paper titled 'Variations in Rainfall Structure of Western North Pacific Landfalling Tropical Cyclones in Warming Climates', published in Earth's Future. The paper is authored by Thao Linh Tran, Elizabeth A. Ritchie, Sarah E. Perkins-Kirkpatrick, Hai Bui, and Thang M. Luong. Descriptions of the variables included in the data files are provided below. ---------------------------------------------------------------------------------------- Data_CMIP6_multimodel_mean_SST_7states.nc Dimensions: (state: 7, month: 12, lat: 181, lon: 360) Coordinates: * state (state) Dimensions: (state: 7, radius: 20, nx: 61, ny: 61) Coordinates: * state (state) Dimensions: (state: 7, radius: 20) Coordinates: * state (state) Dimensions: (state: 7, radius: 20) Coordinates: * state (state) Dimensions: (state: 7, radius: 20) Coordinates: * state (state) Dimensions: (state: 3, level: 38, radius: 252, tc: 117) Coordinates: * state (state) Dimensions: (state: 3, level: 38, radius: 252, tc: 117) Coordinates: * state (state) Dimensions: (state: 3, level: 38, radius: 252, tc: 117) Coordinates: * state (state)
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You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eu1 citations 1 popularity Average influence Average impulse Average Powered by BIP!
more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5281/zenodo.13163766&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Dataset 2021Publisher:Zenodo Alanazi, Anwar Q.; Almalki, Masaud H.; Mishra, Aditya; Kubicki, Dominik J.; Wang, Zaiwei; Merten, Lena; Eickemeyer, Felix T.; Zhang, Hong; Ren, Dan; Alyamani, Ahmed Y.; Albrithen, Hamad; Albadri, Abdulrahman; Alotaibi, Mohammad Hayal; Hinderhofer, Alexander; Zakeeruddin, Shaik M.; Schreiber, Frank; Hagfeldt, Anders; Emsley, Lyndon; Milić, Jovana V.; Graetzel, Michael;Structural, optoelectronic, photovoltaic, and supplementary characterization data for “Benzylammonium-Mediated Formamidinium Lead Iodide Perovskite Phase Stabilization for Photovoltaics”, DOI:10.1002/adfm.202101163. Figure_2_XRD.zip: Data described in Figure 2 (XRD patterns) as Origin (.opj) software file. Figure_3_NMR_data.zip: Data described in Figure 3 (NMR spectra) in the file structure of the TopSpin software, which is available from Bruker. Figure_4_spectra.zip: Data described in Figure 4 (UV-vis absorption, PL and IPCE spectra) as Origin (.opj) software files. Figure_5_PV.zip: Data described in Figure 5 (photovoltaic characterization) as Origin (.opj) software files. Figure_6_spectra.zip: Data described in Figure 6 (PLQY and TRPL) as Origin (.opj) and *.csv files. Figure_7_stability.zip: Data described in Figure 7 (stability analysis) as Origin (.opj) software files. Figure_SI.zip: Data described in the Supporting Information Figures S1, S2, S3, S5, and S6 (XRD data, reciprocal space maps, radial profiles of q-maps, UV-vis absorption spectra, PL spectra, and additional photovoltaic characterization) as Origin (.opj), text (.txt), and image (.tiff) files.
ZENODO arrow_drop_down Smithsonian figshareDataset . 2021License: CC BYData sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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visibility 113visibility views 113 download downloads 35 Powered bymore_vert ZENODO arrow_drop_down Smithsonian figshareDataset . 2021License: CC BYData sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5281/zenodo.4752188&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Dataset 2024Embargo end date: 28 Jun 2024Publisher:Dryad Authors: Westley, Joseph; García, Francisca C.; Warfield, Ruth; Yvon-Durocher, Gabriel;# The community background alters the evolution of thermal performance ## GENERAL INFORMATION Corresponding author * Name: Joseph Westley * Institution: University of Exeter * Email: [jw1235@exeter.ac.uk](mailto:jw1235@exeter.ac.uk) Principal Investigator * Name: Prof. Gabriel Yvon-Durocher * Institution: University of Exeter * Email: [G.Yvon-Durocher@exeter.ac.uk](mailto:G.Yvon-Durocher@exeter.ac.uk) Co-author 1 * Name: Dr. Francisca C. García * Institution: King Abdullah University of Science and Technology (KAUST) * Email: [paquigrcgrc@gmail.com](mailto:paquigrcgrc@gmail.com) Co-author 2 * Name: Ruth Warfield * Institution: University of Exeter * Email: [R.Warfield@exeter.ac.uk](mailto:R.Warfield@exeter.ac.uk) Date of data collection: 2020 ## SHARING/ACCESS INFORMATION **Recommended citation for this dataset:** Westley, J., García, F. C., Warfield, R., Yvon-Durocher, G. (2024). Data from: The community background alters the evolution of thermal performance. Dryad Digital Repository. doi.org/10.5061/dryad.vq83bk41b **Publication associated with this dataset:** Westley, J., García, F. C., Warfield, R., Yvon-Durocher, G. (2024). The community background alters the evolution of thermal performance. Evolution Letters. ## Data description and file structure Contained within the directory "datafiles" are both the raw data files, partially processed data files, and a single processed data file used in all analyses. Raw and partially processed data files for ancestral and monoculture-evolved isolates are combined and are found in the directory "datafiles/monraw". Raw and partially processed data files for community-evolved isolates are located in "datafiles/comraw". The fully processed data file, "final_data.csv", used in all statistical analyses is in the "datafiles" directory (not within a sub-directory). ### Processed data * "final_data.csv" * Description: A single file containing all growth rate data for monoculture, community, and ancestral isolates * Number of columns/variables: 11 * Number of rows/observations: 1421 * Variable List: * r: maximum growth rate per hour r(h−1) * K: maximum optical density reached at a wavelength of 600nm (OD600) * T0.biom: The OD600 at the point at which cultures were inoculated * AIC: The Akaike information criterion for the fit of the logistic growth curve * Id: A variable containing the ID of the isolate. For example, in "OTU2-T1-15-2", "OTU2" means the taxonomic identity is OTU2 (Pseudomonas spp.), "T1" means it was evolved in treatment 1 (monoculture), "15" means it was evolved at 15°C, and "2" means this is biological replicate 2 * temp.c: This is the growth temperature in Celsius * temp: This is the growth temperature in kelvin * ID.a: A variable containing the ID but without distinguishing between biological replicates of the same experimental unit. For example, in "OTU2-T1-15", "OTU2" means the taxonomic identity is OTU2 (Pseudomonas spp.), "T1" means it was evolved in treatment 1 (monoculture), and "15" means it was evolved at 15°C. * evotemp: The temperature an isolate was evolved at in Celsius * OTU: The taxonomic identity of the isolate * Treatment: Whether the isolate is ancestral, monoculture-evolved, or community evolved * Specific abbreviations: * T0 = ancestral isolate, T1 = monoculture evolved isolate, T2 = community evolved isolate * OTU2 = *Pseudomonas* spp., OTU15 = *Serratia* spp., OTU18 = *Aeromonas* spp., OTU20 = *Herbaspirillum* spp., OTU23 = *Janthinobacterium* spp. * survival.csv * Taxon: The taxonomic identity of the isolate * Evolution_temperature: The temperature in Celsius at which the isolate was evolved * Replicates_survived: The count of biological replicates for which the respective isolate survived to the end of the community evolution experiment, out of a total of three ### Raw and partially processed data The following is an explanation of the structure of "datafiles/monraw", but the same file structure is used in "datafiles/comraw". Within "datafiles/monraw" there are the following files: * 192 Raw OD600 measurement files, following the naming format of "T0_15_P1.csv" * Description: These are raw OD600 files output by the Thermo Scientific Multiskan Sky Microplate Spectrophotometer recording at a wavelength of 600 nm. There is a file for all combinations of time points of the growth assay, temperature of the growth assay, and plate identity (plate 1 or plate 2). In the example file name, "T0_15_P1.csv", "T0" refers to timepoint 0 (when the culture was inoculated, not to be confused with the treatment factor level "T0", which denotes ancestral isolates), "15" denotes that the plate was grown at 15°C, and P1 denotes that the data is for plate one. * Dataframe structure: These files do not follow a typical "tidy" or "long form" data structure. Cells are populated by values in the shape of a 96-well plate, where the columns are numbered 1-12, and rows contain sequential letters A-H. For example, the value in row A, column 1, denotes the OD600 for well A1 of the plate being measured. * "Data_mon.csv" * Description: This file contains all data from all 192 raw data files described above collated into an R object in a "tidy" or "long" format. * Number of columns/variables: 12 * Number of rows/observations: 11520 * Variable List: * Replicate: A number designating the biological replicate for the respective experimental unit (note: in the analogous community datafile "Data_com.csv", the replicate variable is named community instead of Replicate) * od_cor: The OD600 measure was corrected to remove the absorbance of the culture media * OTU: The taxonomic identity of the isolate * Treatment: The treatment group that the isolate was evolved in. For example, in "T1-15", "T1" denotes that the isolate evolved in a monoculture, and "15" denotes that the isolates evolved at 15°C. * Timepoint: An integer value specifying the timepoint that the measure was taken, e.g., "0" means at inoculation, "1" is the first measure post-inoculation, etc. * growthtemp: The temperature the plate was grown at in Celsius. * timestampcode: A variable that contains a combination of the growth temperature and the timepoint, e.g., "0-15" denotes timepoint 0 and a growth temperature of 15°C. * Hours: The exact time in hours since culture inoculation that the OD600 reading was recorded * Specific abbreviations: * T0 = ancestral isolate, T1 = monoculture evolved isolate, T2 = community evolved isolate * OTU2 = *Pseudomonas* spp., OTU15 = *Serratia* spp., OTU18 = *Aeromonas* spp., OTU20 = *Herbaspirillum* spp., OTU23 = *Janthinobacterium* spp. * "mon_out.csv" * Description: A file containing all specific OD600 measurements to be removed from the "Data_mon.csv" data frame prior to construction of logistic growth curves (these are typically measurements occurring after carrying capacity has been reached) * Number of columns/variables: 3 * Number of rows/observations: 630 * Variable List: * t: The time in hours that the datapoint occurs * LOG10N: The OD600 measure of the datapoint * pa: A variable containing the ID of the isolate. For example, in "OTU2-T1-15-2", "OTU2" means the taxonomic identity is OTU2 (Pseudomonas spp.), "T1" means it was evolved in treatment 1 (monoculture), "15" means it was evolved at 15°C, and "2" means this is biological replicate 2 * Specific abbreviations: * T0 = ancestral isolate, T1 = monoculture evolved isolate, T2 = community evolved isolate * OTU2 = *Pseudomonas* spp., OTU15 = *Serratia* spp., OTU18 = *Aeromonas* spp., OTU20 = *Herbaspirillum* spp., OTU23 = *Janthinobacterium* spp. * "mon_curves_outrem.csv" * Description: A file containing maximum growth rate data for all monoculture evolved isolates across all growth and evolution temperatures "mon_curves_outrem.csv". Each curve is for a single biological replicate and is produced by fitting a logistic growth model to the OD600 measurements * Number of columns/variables: 6 * Number of rows/observations: 960 * Variable List: * pa: A variable containing the ID of the isolate. For example, in "OTU2-T1-15-2", "OTU2" means the taxonomic identity is OTU2 (Pseudomonas spp.), "T1" means it was evolved in treatment 1 (monoculture), "15" means it was evolved at 15°C, and "2" means this is biological replicate 2 * r: maximum growth rate per hour r(h−1) * k: maximum OD600 reached * T0.biom: The OD600 at the point at which cultures were inoculated * AIC: The Akaike information criterion for the fit of the logistic growth curve * quasi_r2: A "quasi" or "pseudo" r squared value for the fit of the logistic growth curve * "Montimestamps.csv" * Description: A file containing the actual length of time in hours since inoculation (timepoint 0) that each OD600 measurement was taken, e.g., OD600 measurements at timepoint 1 for plates grown at 15°C were taken 4.05 hours after inoculation * Number of columns/variables: 3 * Number of rows/observations: 96 * Variable List: * Timepoint: An integer value specifying the timepoint that the measure was taken, e.g., "0" means at inoculation, "1" is the first measure post-inoculation, etc. * growthtemp: The temperature the plate was grown at in Celsius. * Hours: The exact time in hours since culture inoculation that the OD600 reading was recorded ## Code In the scripts directory, all data processing steps are numbered sequentially. In summary, these scripts perform the following: #### Step 1: Collating raw OD600 data GRE_mon_step1.R and GRE_com_step1.R each collate the raw 96 well plate OD600 datafiles for all time points (e.g., files following the naming format of "T0_15_P1.csv") into an R object. #### Step 2: Converting data to 'tidy' format GRE_mon_step2.R and GRE_com_step2.R take the outputs from step 1 and convert them to a "tidy" format, producing the files "Data_mon.csv" and "Data_com.csv". #### Step 3: Creating logistic growth curves GRE_mon_logcurves_step3.R and GRE_com_logcurves_step3.R take the outputs from step2 ("Data_mon.csv" and "Data_com.csv" respectively) and produce individual logistic growth curves for each isolate ("mon_curves_outrem.csv" and "com_curves_outrem.csv" respectively). "mon_out.csv" and "com_out.csv" are also produced at this stage, and include OD measurements to be removed, prior to growth curve estimation (for example, OD measurements showing a decline occurring after carrying capacity is reached would be removed). Plots of these growth curves are also written to the 'plots_growth_curves' directory as mon_curves_outrem.pdf and com_curves_outrem.pdf (not included in this repository). #### Step 4: Consolidating monoculture-evolved, ancestral, and community-evolved data into a single .csv file GRE_data_consolidation_step4.R collates the monoculture and community growth curve data ("mon_curves_outrem.csv" and "com_curves_outrem.csv") into the single file, "final_data.csv". Curves where carrying capacity is not reached or there is no growth are removed at this stage. #### Step 5: Conducting growth rate analyses and creating Figures 1 and 2 GAMM_r_analysis_step5.R takes "final_data.csv" as input and produces generalised additive mixed-effects models (GAMMs), conducts model comparison via AICc to select the best models, and produces Figure 1 and Figure 2 for the manuscript, based on the predictions of these best models. Additionally, post-hoc analysis is conducted using R package emmeans to get effect sizes and the significance of pairwise differences. See the section 'Statistical analysis' within 'Materials and Methods' of the manuscript for more detailed methods. #### Step 6: Conducting survival analysis and creating Figure 3 Survival_analysis_step6.R also takes "final_data.csv" as input and creates a heatmap showing the number of replicates of each community member that survive to the end of the community experiment, at each evolution temperature. Additionally, a binomial model is used here to test if survival to the end of the community experiment depends on taxonomic identity and evolution temperature. Study taxa Study taxa were derived from biofilm samples collected in May 2016- May 2017 from rock surfaces in several freshwater streams in Hvergerdi Valley, Iceland (64.02, −21.18). These samples were frozen in a 17% glycerol solution after collection and were stored at -20°C. The freshwater streams from which they originated ranged in temperature from 7°C - 38°C, due to variation in the levels of geothermal warming at the site (O’Gorman et al., 2014). On return to the laboratory, samples were thawed at 20°C. The solution they were transported in was then diluted consecutively, and 10 µL of solution was spread onto agar plates and incubated for 10 days at 20°C. Samples were taken from a random selection of the resulting colonies and were placed into 200 µL of lysogeny broth and incubated for 48 hours. This inoculated lysogeny broth was then centrifuged, and the supernatant was discarded. The pellet of bacterial cells was then placed into a lysogeny broth containing 17% glycerol and was frozen at -80°C. 16S PCR was performed for these samples, and the resulting rRNA was sequenced using Sanger sequencing, and taxonomy was assigned by comparing these sequences with existing databases (see (García et al., 2018)). The specific methodology is as follows: A master-mix solution was created and consisted of 7.2 μl of DNA-free water, 0.4 μl of 27 forward primer, 0.4 μl of 1492 reverse primer and 10 μl of Taq polymerase, per sample. A template solution was prepared by adding 2 μl of the sample diluted 100 x in DNA free water, to 18 μl of master-mix solution. These samples were then placed in a thermal cycler (Applied Biosystems Veriti Thermal Cycler). The cycling protocol consisted of 1 cycle at 94°C for 4 minutes, 35 cycles at 94, 48 and 72°C for 1 minute, 30s, and 2 minutes, respectively, and finally, 1 cycle at 72°C for 8 minutes. The final product of the PCR was cleaned using Exonuclease I and Antarctic Phosphatase. Sanger sequencing was conducted on high-quality samples using the 27F, 1492R primers (Core Genomic Facility, University of Sheffield). Geneious (version 6.1.8, (Kearse et al., 2012) was used to trim the sequences, removing the bp from the 5' end and trimming the 3' end to a maximum length of 1000bp. Sequences longer than 974bp were then aligned to the Silva.Bacteria.Fasta database using Mothur version 1.39.5 (Schloss et al., 2009) and the RDP trainset 9 032012 was used as a reference database to assign taxonomy to the isolates. A total of 36 different taxa were identified, and from these five were chosen for use in this study. These five taxa were chosen as they differed in their thermal traits, and in their colony morphologies, the latter requirement being to facilitate visual identification when cultures consisting of more than one taxon were grown on agar. The five taxa chosen for this study and the Genbank accession number were: Pseudomonas spp. (w_Ic161A, MZ506751), Serratia spp. (h_Ic174, MZ506746), Aeromonas spp. (n_Ic167, MZ506748), Herbaspirillum spp. (j_Ic165, MZ506747), and Janthinobacterium spp. (h_Ic161A, MZ506745). Evolution of bacteria in monocultures and communities Bacterial communities comprising all five taxa, as well as monocultures of each taxon, were evolved at temperatures ranging from 15°C - 42°C for ~110 generations. We used 110 generations as past research suggests this would be ample time for the communities to reach an equilibrium. In a previous community evolution experiment conducted at 20°C, it was observed that the majority of communities reached stability after approximately 50 generations (García et al., 2023). Earlier investigations passaging natural communities indicated that around 60 generations were needed for most communities to achieve population equilibria in various instances (Goldford et al., 2018). In the current study, we collected ‘initial’ growth rate data following 2-3 transfers (~10 generations) to allow communities to acclimate to the temperature (mainly to avoid acute stress responses). We then subsequently gathered data at approximately 100 generations later (~110 generations total). The time to reach this number of generations was calculated for the colder evolution temperature groups, to ensure all treatment groups reached a minimum of ~100 generations. The specific methodology follows: An initial stock solution for each taxon was created from a single colony clone, using lysogeny broth, which was then incubated overnight at 20°C. These were then standardised to a common optical density with R2 media, and then a community stock solution was constructed by combining 100 µL of each of the five taxa. 40 µL of stock solution was then used to inoculate 5000 µL of R2 media. Three replicates of these inoculated media were then incubated at each of the following temperatures: 15°C, 20°C, 23°C, 27°C, 30°C, 33°C, 37°C, and 42°C. This was then repeated, but instead of inoculation with community stock solution, monoculture stock solution was used, ensuring the same starting biomass of each taxon for each treatment group. Every 48 hours during incubation, 40 µL was removed from each culture and was used to inoculate a fresh 5000 µL of R2 media, to prevent resource limitation from occurring. This was done 18 times, equating to ~110 generations. At the end of the experiment, serial dilutions of the resulting cultures were then grown on agar, and samples of individual taxa were isolated and frozen at -80°C in 17% glycerol. For the community cultures, individual taxa were identified based on colony morphology. Growth assay of evolved isolates From every evolution experiment a single clone was isolated. These isolates, as well as the original ancestral samples, were then grown at temperatures ranging from 15°C - 42°C. Maximum growth rates (r(h-1)) were calculated at each temperature. The specific methodology is as follows: Every evolved isolate, as well as the original ancestral taxa, were thawed in R2 growth media at 20°C for 24 hours. These cultures were then diluted with more R2 media until all cultures were at an optical density (OD600) of 0.05, measured using a Themo ScientificTM Multiskan Sky Microplate Spectrophotometer, at a wavelength of 600nm. 200 µL of each culture was then transferred into 96 well plates. Control ‘blank’ wells were filled with only R2 medium. The plate was then incubated at 15 °C until carrying capacity was reached (~54 hours), and OD600 measurements were taken every ~4 hours. This process was repeated for all isolates, at incubation temperatures of 20°C, 23°C, 27°C, 30°C, 33°C, 37°C, and 42°C. Due to handling time, there was some variation in measurement intervals, but in all analyses exact intervals calculated from timestamps are used. The mean OD600 value for blank wells in a plate was subtracted from all OD600 measurements. Fitting growth curves All modelling of growth curves was conducted in R version 4.0.2 (R Core Team, 2021), using the nlsLoop package (Padfield, 2016/2020). The maximum growth rates (r (h−1), hereafter simply r, or maximum growth rate) for each incubated culture (see section 2.3) were calculated by fitting the logistic growth equation to the OD600 measurements, using non-linear least squares regression. Nt = K/(1 +〖Ae〗^(-rt) ); A = (K - N_0)/N0 (1) In equation 1, Nt is the biomass at time, t, K is the carrying capacity, N0 is the starting biomass and r is the exponential population growth rate (r(h−1)). For some cultures, after reaching carrying capacity there would be a slow decline in cell density. As the above model cannot estimate this decline, these datapoints demonstrating a post-asymptote decline were removed. Statistical analysis All statistical analyses were conducted in R version 4.0.2 (R Core Team, 2021), and all plots were created using ggplot2, and other tidyverse (Wickham et al., 2019) packages were used for data handling. For all analyses, monoculture-evolved isolates were only included if their respective isolate had survived to the end of the community evolution experiment. For example, at an evolution temperature of 33°C, only Aeromonas spp. and Herbaspirillum spp. survived to the end of the evolution experiment, therefore only Aeromonas spp. and Herbaspirillum spp. isolates that were evolved at 33°C in monoculture were included in the analysis, and Pseudomonas spp., Serratia spp., and Janthinobacterium spp. isolates that were evolved at 33°C in monoculture were excluded from the analysis. This prevented a survivorship bias from confounding the results. For the within-taxon analysis, separate generalised additive mixed-effect models (GAMMs) were fit for each taxon, using the function uGamm from the R package MuMIn (Bartoń, 2022). The initial full model included maximum growth rate as the response variable, and the following fixed effects and smoothing terms: evolution temperature, treatment (monoculture, ancestral, or community evolved), an interaction between evolution temperature and treatment, and a smoothing term on growth temperature, which was allowed to vary by treatment. A single random effect encompassing taxon and biological replicate (at the level of each evolved lineage) was included in all models. All possible sub-models were created and compared by their sample-corrected Akaike information criterion (AICc) using the function AICc from the package MuMIn, although models without a smoothing term on growth temperature were not considered. The threshold for determining a significant difference between models was when ΔAICc was >2. Where there were one or more models falling within 2 ΔAICc of the lowest AICc model, the more minimal model was selected as the best model. The R package emmeans (Lenth, 2017/2023) was used to conduct post-hoc pairwise comparisons for model estimates across both evolution temperatures and treatment group. For the ‘all taxa combined’ analysis, model creation and selection was conducted in the same way as the within taxon analysis. Fixed and random effects were the same as in the within taxon analysis. However, due to issues with rank deficiency when trying to incorporate ancestral data into this model, a separate model for the effect of growth temperature on growth rate for the ancestor was constructed. This negates pairwise significance testing of differences between ancestral and evolved lineages but does allow both visual comparison of TPCs by superimposing the ancestral model predictions onto a figure displaying the predictions for the monoculture and community evolved isolates (Figure 1). For the community survival analysis, binomial Generalised linear models were fit using the base R glm function, and fixed effects taxon identify and evolution temperature. Fixed effects were determined to be significant if the ΔAICc of their removal was >2. Microbes are key drivers of global biogeochemical cycles and their functional roles are heavily dependent on temperature. Large population sizes and rapid turnover rates mean that the predominant response of microbes to environmental warming is likely to be evolutionary, yet our understanding of evolutionary responses to temperature change in microbial systems is rudimentary. Natural microbial communities are diverse assemblages of interacting taxa. However, most studies investigating the evolutionary response of bacteria to temperature change are focused on monocultures. Here we utilise high throughput experimental evolution of bacteria in both monoculture and community contexts along a thermal gradient to determine how interspecific interactions influence the thermal adaptation of community members. We found that community-evolved isolates tended towards higher maximum growth rates across the temperature gradient compared to their monoculture-evolved counterparts. We also saw little evidence of systematic evolutionary change in the shapes of bacterial thermal tolerance curves along the thermal gradient. However, the effect of community background and selection temperature on the evolution of thermal tolerance curves was variable and highly taxon-specific – with some taxa exhibiting pronounced changes in thermal tolerance, while others were less impacted. We also found that temperature acted as a strong environmental filter, resulting in the local extinction of taxa along the thermal gradient, implying that temperature-driven ecological change was a key factor shaping the community background upon which evolutionary selection can operate. These findings offer novel insight into how the community background impacts thermal adaptation.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2020Publisher:Springer Science and Business Media LLC Setareh Katircioglu; Najia Saqib; Salih Katircioglu; Ceyhun C. Kilinc; Hasan Gul;This study searches the impact of tourism growth on emission pollutants in Cyprus (north), which is a small island in the Mediterranean and has shown significant development in hotel and casino sectors in the last two decades. Results from time-series analyses reveal that an inverted U-shaped EKC hypothesis is confirmed for Cyprus with and without tourism development. Tourism also exerts positively significant and long-term effects on the levels of carbon emissions, revealing that growth in the tourism sector causes degradation in the environment.
Air Quality Atmosphe... arrow_drop_down Air Quality Atmosphere & HealthArticle . 2020 . Peer-reviewedLicense: Springer TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesbronze 59 citations 59 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!
more_vert Air Quality Atmosphe... arrow_drop_down Air Quality Atmosphere & HealthArticle . 2020 . Peer-reviewedLicense: Springer TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2020Publisher:Elsevier BV Nabeel Ahmad; Nabeel Ahmad; Nasir Shehzad; Usama Ahmed; Ibrahim M. Maafa; Murid Hussain; Parveen Akhter; Um-e-Salma Amjad; Nauman Ahmad; Momina Javaid;Abstract Liquefaction of poly-isoprene based rubber (PIR) was performed using ethanol as a solvent for the production of liquid fuel and chemicals. An autoclave batch reactor was used to perform the ethanolysis of PIR at different temperature ranges (250–375 °C), with different ethanol to PIR ratio (0.5:1 to 4:1), and at different reaction times (15–75mins). The experimental results showed that a maximum yield of 86 wt % was achieved at temperature of 325 °C, ethanol to PIR ratio 1/1, and reaction time of 30 min. This liquid oil yield is about 14% higher than the yield obtained from the pyrolysis of PIR at 500 °C and about 10% higher than the yield obtained from hydrothermal liquefaction of PIR at 375 °C. Moreover, the utilization of ethanol in the process was also incorporated and product yields were redefined. Furthermore, ethanol contributed to enhance the quality of liquid-oil, particularly in term of viscosity, acidity, and energy density. Furthermore, the FTIR analysis showed methyl and methylene were most dominating functional groups found in the liquid product and GCMS analysis identified that they were presented by alkenes, aromatics, and alkyls.
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You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesbronze 19 citations 19 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
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You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2021Publisher:Foundation of Computer Science Authors: Mohammad S. Khrisat; Hatim Ghazi Zaini; Ziad Alqadi;add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 1 citations 1 popularity Average influence Average impulse Average Powered by BIP!
more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5120/ijca2021921361&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2020Publisher:MDPI AG Authors: Mohd. Ahmed; Javed Mallick; Saeed AlQadhi; Nabil Ben Kahla;doi: 10.3390/su12198110
The development of a concrete mixture design process for high-quality concrete production with sustainable values is a complex process because of the multiple required properties at the green/hardened state of concrete and the interdependency of concrete mixture parameters. A new multicriteria decision making (MCDM) technique based on Technique of Order Preference Similarity to the Ideal Solution (TOPSIS) methodology is applied to a fuzzy setting for the selection of concrete mix factors and concrete mixture design methods with the aim towards sustainable concrete quality management. Three objective properties for sustainable quality concrete are adopted as criteria in the proposed MCDM model. The seven most dominant concrete mixture parameters with consideration to sustainable concrete quality issues, i.e., environmental (density, durability) and socioeconomic criteria (cost, optimum mixture ingredients ratios), are proposed as sub-criteria. Three mixture design techniques that have potentiality to include sustainable aspects in their design procedure, two advanced and one conventional concrete mixture design method, are taken as alternatives in the MCDM model. The proposed selection support framework may be utilized in updating concrete design methods for sustainability and in deciding the most dominant concrete mix factors that can provide sustainable quality management in concrete production as well as in concrete construction. The concrete mix factors found to be most influential to produce sustainable concrete quality include the water/cement ratio and density. The outcomes of the proposed MCDM model of fuzzy TOPSIS are consistent with the published literature and theory. The DOE method was found to be more suitable in sustainable concrete quality management considering its applicable objective quality properties and concrete mix factors.
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You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/su12198110&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 12 citations 12 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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description Publicationkeyboard_double_arrow_right Article , Journal 2019Publisher:MDPI AG Authors: Mohammad Mominur Rahman; Kashif Irshad; Mohammad Mizanur Rahman; Hasan Zahir;Heat energy storage systems were fabricated with the impregnation method using MgO and Mg(OH)2 as supporting materials and polyethylene glycol (PEG-6000) as the functional phase. MgO and Mg(OH)2 were synthesized from the salt Mg(NO3)·6H2O by performing hydrothermal reactions with various precipitating agents. The precipitating agents were NaOH, KOH, NH3, NH3 with pamoic acid (PA), or (NH4)2CO3. The result shows that the selection of the precipitating agent has a significant impact on the crystallite structure, size, and shape of the final products. Of the precipitating agents tested, only NaOH and NH3 with PA produce single-phase Mg(OH)2 as the as-synthesized product. Pore size distribution analyses revealed that the surfaces of the as-synthesized MgO have a slit-like pore structure with a broad-type pore size distribution, whereas the as-synthesized Mg(OH)2 has a mesoporous structure with a narrow pore size distribution. This structure enhances the latent heat of the phase change material (PCM) as well as super cooling mitigation. The PEG/Mg(OH)2 PCM also exhibits reproducible behavior over a large number of thermal cycles. Both MgO and Mg(OH)2 matrices prevent the leakage of liquid PEG during the phase transition in phase change materials (PCMs). However, MgO/PEG has a low impregnation ratio and efficiency, with a low thermal storage capability. This is due to the large pore diameter, which does not allow MgO to retain a larger amount of PEG. The latent heat values of PEG-1000/PEG-6000 blends with MgO and Mg(OH)2 were also determined with a view to extending the application of the PCMs to energy storage over wider temperature ranges.
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You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 119 citations 119 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!
more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2024Publisher:Springer Science and Business Media LLC Authors: Krishnamurthy, Mathivanan; Abdulwahed Fahad, Alrefaei; Loganathan, Praburaman; Rajesh, Ramasamy; +3 AuthorsKrishnamurthy, Mathivanan; Abdulwahed Fahad, Alrefaei; Loganathan, Praburaman; Rajesh, Ramasamy; Prithiva, Nagarajan; Eerla, Rakesh; Ruiyong, Zhang;pmid: 38849628
In this study, the freshwater microalgae Selenastrum sp. was assessed for the effective degradation of pyrene and simultaneous production of biodiesel from pyrene-tolerant biomass. The growth of algae was determined based on the cell dry weight, cell density, chlorophyll content, and biomass productivity under different pyrene concentrations. Further, lipids from pyrene tolerant culture were converted into biodiesel by acid-catalyzed transesterification, which was characterized for the total fatty acid profile by gas chromatography. Increased pyrene concentration revealed less biomass yield and productivity after 20 days of treatment, indicating potent pyrene biodegradation by Selenastrum sp. Biomass yield was unaffected till the 20 mg/L pyrene. A 95% of pyrene bioremediation was observed at 20 days of culturing. Lipid accumulation of 22.14%, as evident from the estimation of the total lipid content, indicated a marginal increase in corroborating pyrene stress in the culture. Fatty acid methyl esters yield of 63.06% (% per 100 g lipids) was noticed from the pyrene tolerant culture. Moreover, fatty acid profile analysis of biodiesel produced under 10 mg/L and 20 mg/L pyrene condition showed escalated levels of desirable fatty acids in Selenastrum sp., compared to the control. Further, Selenastrum sp. and other freshwater microalgae are catalogued for sustainable development goals attainment by 2030, as per the UNSDG (United Nations Sustainable Development Goals) agenda. Critical applications for the Selenastrum sp. in bioremediation of pyrene, along with biodiesel production, are enumerated for sustainable and renewable energy production and resource management.
Environmental Geoche... arrow_drop_down Environmental Geochemistry and HealthArticle . 2024 . Peer-reviewedLicense: Springer Nature TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!
more_vert Environmental Geoche... arrow_drop_down Environmental Geochemistry and HealthArticle . 2024 . Peer-reviewedLicense: Springer Nature TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Dataset 2022 Saudi ArabiaPublisher:Zenodo Kohler, Tyler J; Fodelianakis, Stilianos; Michoud, Gregoire; Ezzat, Leïla; Bourquin, Massimo; Peter, Hannes; Busi, Susheel Bhanu; Pramateftaki, Paraskevi; Deluigi, Nicola; Styllas, Michail; Tolosano, Matteo; Staercke, Vincent; Schön, Martina; Brandani, Jade; Marasco, Ramona; Daffonchio, Daniele; Wilmes, Paul; Battin, Tom J.;handle: 10754/686881
Two datasets supporting the publication, "Glacier shrinkage will accelerate downstream decomposition of organic matter and alters microbiome structure and function" in Global Change Biology. DATA S1 Detailed metadata for sampled glacier-fed streams, including sample date and time, GPS coordinates, elevation, physical streamwater measurements, glacier characteristics, nutrient chemistry, and a column indicating samples used in metagenomics analyses. DATA S2 Full patch-level dataset of extracellular enzyme activities (nmol h-1 g-1 DM sediment) and chlorophyll a (µg chlorophyll a g-1 DM).
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You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!
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For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Dataset 2024Publisher:Zenodo Authors: Tran, Thao Linh; Ritchie, Elizabeth A.; Perkins-Kirkpatrick, Sarah E.; Bui, Hai; +1 AuthorsTran, Thao Linh; Ritchie, Elizabeth A.; Perkins-Kirkpatrick, Sarah E.; Bui, Hai; Luong, Thang M;This dataset contains the data used in the analyses for the paper titled 'Variations in Rainfall Structure of Western North Pacific Landfalling Tropical Cyclones in Warming Climates', published in Earth's Future. The paper is authored by Thao Linh Tran, Elizabeth A. Ritchie, Sarah E. Perkins-Kirkpatrick, Hai Bui, and Thang M. Luong. Descriptions of the variables included in the data files are provided below. ---------------------------------------------------------------------------------------- Data_CMIP6_multimodel_mean_SST_7states.nc Dimensions: (state: 7, month: 12, lat: 181, lon: 360) Coordinates: * state (state) Dimensions: (state: 7, radius: 20, nx: 61, ny: 61) Coordinates: * state (state) Dimensions: (state: 7, radius: 20) Coordinates: * state (state) Dimensions: (state: 7, radius: 20) Coordinates: * state (state) Dimensions: (state: 7, radius: 20) Coordinates: * state (state) Dimensions: (state: 3, level: 38, radius: 252, tc: 117) Coordinates: * state (state) Dimensions: (state: 3, level: 38, radius: 252, tc: 117) Coordinates: * state (state) Dimensions: (state: 3, level: 38, radius: 252, tc: 117) Coordinates: * state (state)
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For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Dataset 2021Publisher:Zenodo Alanazi, Anwar Q.; Almalki, Masaud H.; Mishra, Aditya; Kubicki, Dominik J.; Wang, Zaiwei; Merten, Lena; Eickemeyer, Felix T.; Zhang, Hong; Ren, Dan; Alyamani, Ahmed Y.; Albrithen, Hamad; Albadri, Abdulrahman; Alotaibi, Mohammad Hayal; Hinderhofer, Alexander; Zakeeruddin, Shaik M.; Schreiber, Frank; Hagfeldt, Anders; Emsley, Lyndon; Milić, Jovana V.; Graetzel, Michael;Structural, optoelectronic, photovoltaic, and supplementary characterization data for “Benzylammonium-Mediated Formamidinium Lead Iodide Perovskite Phase Stabilization for Photovoltaics”, DOI:10.1002/adfm.202101163. Figure_2_XRD.zip: Data described in Figure 2 (XRD patterns) as Origin (.opj) software file. Figure_3_NMR_data.zip: Data described in Figure 3 (NMR spectra) in the file structure of the TopSpin software, which is available from Bruker. Figure_4_spectra.zip: Data described in Figure 4 (UV-vis absorption, PL and IPCE spectra) as Origin (.opj) software files. Figure_5_PV.zip: Data described in Figure 5 (photovoltaic characterization) as Origin (.opj) software files. Figure_6_spectra.zip: Data described in Figure 6 (PLQY and TRPL) as Origin (.opj) and *.csv files. Figure_7_stability.zip: Data described in Figure 7 (stability analysis) as Origin (.opj) software files. Figure_SI.zip: Data described in the Supporting Information Figures S1, S2, S3, S5, and S6 (XRD data, reciprocal space maps, radial profiles of q-maps, UV-vis absorption spectra, PL spectra, and additional photovoltaic characterization) as Origin (.opj), text (.txt), and image (.tiff) files.
ZENODO arrow_drop_down Smithsonian figshareDataset . 2021License: CC BYData sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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visibility 113visibility views 113 download downloads 35 Powered bymore_vert ZENODO arrow_drop_down Smithsonian figshareDataset . 2021License: CC BYData sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Dataset 2024Embargo end date: 28 Jun 2024Publisher:Dryad Authors: Westley, Joseph; García, Francisca C.; Warfield, Ruth; Yvon-Durocher, Gabriel;# The community background alters the evolution of thermal performance ## GENERAL INFORMATION Corresponding author * Name: Joseph Westley * Institution: University of Exeter * Email: [jw1235@exeter.ac.uk](mailto:jw1235@exeter.ac.uk) Principal Investigator * Name: Prof. Gabriel Yvon-Durocher * Institution: University of Exeter * Email: [G.Yvon-Durocher@exeter.ac.uk](mailto:G.Yvon-Durocher@exeter.ac.uk) Co-author 1 * Name: Dr. Francisca C. García * Institution: King Abdullah University of Science and Technology (KAUST) * Email: [paquigrcgrc@gmail.com](mailto:paquigrcgrc@gmail.com) Co-author 2 * Name: Ruth Warfield * Institution: University of Exeter * Email: [R.Warfield@exeter.ac.uk](mailto:R.Warfield@exeter.ac.uk) Date of data collection: 2020 ## SHARING/ACCESS INFORMATION **Recommended citation for this dataset:** Westley, J., García, F. C., Warfield, R., Yvon-Durocher, G. (2024). Data from: The community background alters the evolution of thermal performance. Dryad Digital Repository. doi.org/10.5061/dryad.vq83bk41b **Publication associated with this dataset:** Westley, J., García, F. C., Warfield, R., Yvon-Durocher, G. (2024). The community background alters the evolution of thermal performance. Evolution Letters. ## Data description and file structure Contained within the directory "datafiles" are both the raw data files, partially processed data files, and a single processed data file used in all analyses. Raw and partially processed data files for ancestral and monoculture-evolved isolates are combined and are found in the directory "datafiles/monraw". Raw and partially processed data files for community-evolved isolates are located in "datafiles/comraw". The fully processed data file, "final_data.csv", used in all statistical analyses is in the "datafiles" directory (not within a sub-directory). ### Processed data * "final_data.csv" * Description: A single file containing all growth rate data for monoculture, community, and ancestral isolates * Number of columns/variables: 11 * Number of rows/observations: 1421 * Variable List: * r: maximum growth rate per hour r(h−1) * K: maximum optical density reached at a wavelength of 600nm (OD600) * T0.biom: The OD600 at the point at which cultures were inoculated * AIC: The Akaike information criterion for the fit of the logistic growth curve * Id: A variable containing the ID of the isolate. For example, in "OTU2-T1-15-2", "OTU2" means the taxonomic identity is OTU2 (Pseudomonas spp.), "T1" means it was evolved in treatment 1 (monoculture), "15" means it was evolved at 15°C, and "2" means this is biological replicate 2 * temp.c: This is the growth temperature in Celsius * temp: This is the growth temperature in kelvin * ID.a: A variable containing the ID but without distinguishing between biological replicates of the same experimental unit. For example, in "OTU2-T1-15", "OTU2" means the taxonomic identity is OTU2 (Pseudomonas spp.), "T1" means it was evolved in treatment 1 (monoculture), and "15" means it was evolved at 15°C. * evotemp: The temperature an isolate was evolved at in Celsius * OTU: The taxonomic identity of the isolate * Treatment: Whether the isolate is ancestral, monoculture-evolved, or community evolved * Specific abbreviations: * T0 = ancestral isolate, T1 = monoculture evolved isolate, T2 = community evolved isolate * OTU2 = *Pseudomonas* spp., OTU15 = *Serratia* spp., OTU18 = *Aeromonas* spp., OTU20 = *Herbaspirillum* spp., OTU23 = *Janthinobacterium* spp. * survival.csv * Taxon: The taxonomic identity of the isolate * Evolution_temperature: The temperature in Celsius at which the isolate was evolved * Replicates_survived: The count of biological replicates for which the respective isolate survived to the end of the community evolution experiment, out of a total of three ### Raw and partially processed data The following is an explanation of the structure of "datafiles/monraw", but the same file structure is used in "datafiles/comraw". Within "datafiles/monraw" there are the following files: * 192 Raw OD600 measurement files, following the naming format of "T0_15_P1.csv" * Description: These are raw OD600 files output by the Thermo Scientific Multiskan Sky Microplate Spectrophotometer recording at a wavelength of 600 nm. There is a file for all combinations of time points of the growth assay, temperature of the growth assay, and plate identity (plate 1 or plate 2). In the example file name, "T0_15_P1.csv", "T0" refers to timepoint 0 (when the culture was inoculated, not to be confused with the treatment factor level "T0", which denotes ancestral isolates), "15" denotes that the plate was grown at 15°C, and P1 denotes that the data is for plate one. * Dataframe structure: These files do not follow a typical "tidy" or "long form" data structure. Cells are populated by values in the shape of a 96-well plate, where the columns are numbered 1-12, and rows contain sequential letters A-H. For example, the value in row A, column 1, denotes the OD600 for well A1 of the plate being measured. * "Data_mon.csv" * Description: This file contains all data from all 192 raw data files described above collated into an R object in a "tidy" or "long" format. * Number of columns/variables: 12 * Number of rows/observations: 11520 * Variable List: * Replicate: A number designating the biological replicate for the respective experimental unit (note: in the analogous community datafile "Data_com.csv", the replicate variable is named community instead of Replicate) * od_cor: The OD600 measure was corrected to remove the absorbance of the culture media * OTU: The taxonomic identity of the isolate * Treatment: The treatment group that the isolate was evolved in. For example, in "T1-15", "T1" denotes that the isolate evolved in a monoculture, and "15" denotes that the isolates evolved at 15°C. * Timepoint: An integer value specifying the timepoint that the measure was taken, e.g., "0" means at inoculation, "1" is the first measure post-inoculation, etc. * growthtemp: The temperature the plate was grown at in Celsius. * timestampcode: A variable that contains a combination of the growth temperature and the timepoint, e.g., "0-15" denotes timepoint 0 and a growth temperature of 15°C. * Hours: The exact time in hours since culture inoculation that the OD600 reading was recorded * Specific abbreviations: * T0 = ancestral isolate, T1 = monoculture evolved isolate, T2 = community evolved isolate * OTU2 = *Pseudomonas* spp., OTU15 = *Serratia* spp., OTU18 = *Aeromonas* spp., OTU20 = *Herbaspirillum* spp., OTU23 = *Janthinobacterium* spp. * "mon_out.csv" * Description: A file containing all specific OD600 measurements to be removed from the "Data_mon.csv" data frame prior to construction of logistic growth curves (these are typically measurements occurring after carrying capacity has been reached) * Number of columns/variables: 3 * Number of rows/observations: 630 * Variable List: * t: The time in hours that the datapoint occurs * LOG10N: The OD600 measure of the datapoint * pa: A variable containing the ID of the isolate. For example, in "OTU2-T1-15-2", "OTU2" means the taxonomic identity is OTU2 (Pseudomonas spp.), "T1" means it was evolved in treatment 1 (monoculture), "15" means it was evolved at 15°C, and "2" means this is biological replicate 2 * Specific abbreviations: * T0 = ancestral isolate, T1 = monoculture evolved isolate, T2 = community evolved isolate * OTU2 = *Pseudomonas* spp., OTU15 = *Serratia* spp., OTU18 = *Aeromonas* spp., OTU20 = *Herbaspirillum* spp., OTU23 = *Janthinobacterium* spp. * "mon_curves_outrem.csv" * Description: A file containing maximum growth rate data for all monoculture evolved isolates across all growth and evolution temperatures "mon_curves_outrem.csv". Each curve is for a single biological replicate and is produced by fitting a logistic growth model to the OD600 measurements * Number of columns/variables: 6 * Number of rows/observations: 960 * Variable List: * pa: A variable containing the ID of the isolate. For example, in "OTU2-T1-15-2", "OTU2" means the taxonomic identity is OTU2 (Pseudomonas spp.), "T1" means it was evolved in treatment 1 (monoculture), "15" means it was evolved at 15°C, and "2" means this is biological replicate 2 * r: maximum growth rate per hour r(h−1) * k: maximum OD600 reached * T0.biom: The OD600 at the point at which cultures were inoculated * AIC: The Akaike information criterion for the fit of the logistic growth curve * quasi_r2: A "quasi" or "pseudo" r squared value for the fit of the logistic growth curve * "Montimestamps.csv" * Description: A file containing the actual length of time in hours since inoculation (timepoint 0) that each OD600 measurement was taken, e.g., OD600 measurements at timepoint 1 for plates grown at 15°C were taken 4.05 hours after inoculation * Number of columns/variables: 3 * Number of rows/observations: 96 * Variable List: * Timepoint: An integer value specifying the timepoint that the measure was taken, e.g., "0" means at inoculation, "1" is the first measure post-inoculation, etc. * growthtemp: The temperature the plate was grown at in Celsius. * Hours: The exact time in hours since culture inoculation that the OD600 reading was recorded ## Code In the scripts directory, all data processing steps are numbered sequentially. In summary, these scripts perform the following: #### Step 1: Collating raw OD600 data GRE_mon_step1.R and GRE_com_step1.R each collate the raw 96 well plate OD600 datafiles for all time points (e.g., files following the naming format of "T0_15_P1.csv") into an R object. #### Step 2: Converting data to 'tidy' format GRE_mon_step2.R and GRE_com_step2.R take the outputs from step 1 and convert them to a "tidy" format, producing the files "Data_mon.csv" and "Data_com.csv". #### Step 3: Creating logistic growth curves GRE_mon_logcurves_step3.R and GRE_com_logcurves_step3.R take the outputs from step2 ("Data_mon.csv" and "Data_com.csv" respectively) and produce individual logistic growth curves for each isolate ("mon_curves_outrem.csv" and "com_curves_outrem.csv" respectively). "mon_out.csv" and "com_out.csv" are also produced at this stage, and include OD measurements to be removed, prior to growth curve estimation (for example, OD measurements showing a decline occurring after carrying capacity is reached would be removed). Plots of these growth curves are also written to the 'plots_growth_curves' directory as mon_curves_outrem.pdf and com_curves_outrem.pdf (not included in this repository). #### Step 4: Consolidating monoculture-evolved, ancestral, and community-evolved data into a single .csv file GRE_data_consolidation_step4.R collates the monoculture and community growth curve data ("mon_curves_outrem.csv" and "com_curves_outrem.csv") into the single file, "final_data.csv". Curves where carrying capacity is not reached or there is no growth are removed at this stage. #### Step 5: Conducting growth rate analyses and creating Figures 1 and 2 GAMM_r_analysis_step5.R takes "final_data.csv" as input and produces generalised additive mixed-effects models (GAMMs), conducts model comparison via AICc to select the best models, and produces Figure 1 and Figure 2 for the manuscript, based on the predictions of these best models. Additionally, post-hoc analysis is conducted using R package emmeans to get effect sizes and the significance of pairwise differences. See the section 'Statistical analysis' within 'Materials and Methods' of the manuscript for more detailed methods. #### Step 6: Conducting survival analysis and creating Figure 3 Survival_analysis_step6.R also takes "final_data.csv" as input and creates a heatmap showing the number of replicates of each community member that survive to the end of the community experiment, at each evolution temperature. Additionally, a binomial model is used here to test if survival to the end of the community experiment depends on taxonomic identity and evolution temperature. Study taxa Study taxa were derived from biofilm samples collected in May 2016- May 2017 from rock surfaces in several freshwater streams in Hvergerdi Valley, Iceland (64.02, −21.18). These samples were frozen in a 17% glycerol solution after collection and were stored at -20°C. The freshwater streams from which they originated ranged in temperature from 7°C - 38°C, due to variation in the levels of geothermal warming at the site (O’Gorman et al., 2014). On return to the laboratory, samples were thawed at 20°C. The solution they were transported in was then diluted consecutively, and 10 µL of solution was spread onto agar plates and incubated for 10 days at 20°C. Samples were taken from a random selection of the resulting colonies and were placed into 200 µL of lysogeny broth and incubated for 48 hours. This inoculated lysogeny broth was then centrifuged, and the supernatant was discarded. The pellet of bacterial cells was then placed into a lysogeny broth containing 17% glycerol and was frozen at -80°C. 16S PCR was performed for these samples, and the resulting rRNA was sequenced using Sanger sequencing, and taxonomy was assigned by comparing these sequences with existing databases (see (García et al., 2018)). The specific methodology is as follows: A master-mix solution was created and consisted of 7.2 μl of DNA-free water, 0.4 μl of 27 forward primer, 0.4 μl of 1492 reverse primer and 10 μl of Taq polymerase, per sample. A template solution was prepared by adding 2 μl of the sample diluted 100 x in DNA free water, to 18 μl of master-mix solution. These samples were then placed in a thermal cycler (Applied Biosystems Veriti Thermal Cycler). The cycling protocol consisted of 1 cycle at 94°C for 4 minutes, 35 cycles at 94, 48 and 72°C for 1 minute, 30s, and 2 minutes, respectively, and finally, 1 cycle at 72°C for 8 minutes. The final product of the PCR was cleaned using Exonuclease I and Antarctic Phosphatase. Sanger sequencing was conducted on high-quality samples using the 27F, 1492R primers (Core Genomic Facility, University of Sheffield). Geneious (version 6.1.8, (Kearse et al., 2012) was used to trim the sequences, removing the bp from the 5' end and trimming the 3' end to a maximum length of 1000bp. Sequences longer than 974bp were then aligned to the Silva.Bacteria.Fasta database using Mothur version 1.39.5 (Schloss et al., 2009) and the RDP trainset 9 032012 was used as a reference database to assign taxonomy to the isolates. A total of 36 different taxa were identified, and from these five were chosen for use in this study. These five taxa were chosen as they differed in their thermal traits, and in their colony morphologies, the latter requirement being to facilitate visual identification when cultures consisting of more than one taxon were grown on agar. The five taxa chosen for this study and the Genbank accession number were: Pseudomonas spp. (w_Ic161A, MZ506751), Serratia spp. (h_Ic174, MZ506746), Aeromonas spp. (n_Ic167, MZ506748), Herbaspirillum spp. (j_Ic165, MZ506747), and Janthinobacterium spp. (h_Ic161A, MZ506745). Evolution of bacteria in monocultures and communities Bacterial communities comprising all five taxa, as well as monocultures of each taxon, were evolved at temperatures ranging from 15°C - 42°C for ~110 generations. We used 110 generations as past research suggests this would be ample time for the communities to reach an equilibrium. In a previous community evolution experiment conducted at 20°C, it was observed that the majority of communities reached stability after approximately 50 generations (García et al., 2023). Earlier investigations passaging natural communities indicated that around 60 generations were needed for most communities to achieve population equilibria in various instances (Goldford et al., 2018). In the current study, we collected ‘initial’ growth rate data following 2-3 transfers (~10 generations) to allow communities to acclimate to the temperature (mainly to avoid acute stress responses). We then subsequently gathered data at approximately 100 generations later (~110 generations total). The time to reach this number of generations was calculated for the colder evolution temperature groups, to ensure all treatment groups reached a minimum of ~100 generations. The specific methodology follows: An initial stock solution for each taxon was created from a single colony clone, using lysogeny broth, which was then incubated overnight at 20°C. These were then standardised to a common optical density with R2 media, and then a community stock solution was constructed by combining 100 µL of each of the five taxa. 40 µL of stock solution was then used to inoculate 5000 µL of R2 media. Three replicates of these inoculated media were then incubated at each of the following temperatures: 15°C, 20°C, 23°C, 27°C, 30°C, 33°C, 37°C, and 42°C. This was then repeated, but instead of inoculation with community stock solution, monoculture stock solution was used, ensuring the same starting biomass of each taxon for each treatment group. Every 48 hours during incubation, 40 µL was removed from each culture and was used to inoculate a fresh 5000 µL of R2 media, to prevent resource limitation from occurring. This was done 18 times, equating to ~110 generations. At the end of the experiment, serial dilutions of the resulting cultures were then grown on agar, and samples of individual taxa were isolated and frozen at -80°C in 17% glycerol. For the community cultures, individual taxa were identified based on colony morphology. Growth assay of evolved isolates From every evolution experiment a single clone was isolated. These isolates, as well as the original ancestral samples, were then grown at temperatures ranging from 15°C - 42°C. Maximum growth rates (r(h-1)) were calculated at each temperature. The specific methodology is as follows: Every evolved isolate, as well as the original ancestral taxa, were thawed in R2 growth media at 20°C for 24 hours. These cultures were then diluted with more R2 media until all cultures were at an optical density (OD600) of 0.05, measured using a Themo ScientificTM Multiskan Sky Microplate Spectrophotometer, at a wavelength of 600nm. 200 µL of each culture was then transferred into 96 well plates. Control ‘blank’ wells were filled with only R2 medium. The plate was then incubated at 15 °C until carrying capacity was reached (~54 hours), and OD600 measurements were taken every ~4 hours. This process was repeated for all isolates, at incubation temperatures of 20°C, 23°C, 27°C, 30°C, 33°C, 37°C, and 42°C. Due to handling time, there was some variation in measurement intervals, but in all analyses exact intervals calculated from timestamps are used. The mean OD600 value for blank wells in a plate was subtracted from all OD600 measurements. Fitting growth curves All modelling of growth curves was conducted in R version 4.0.2 (R Core Team, 2021), using the nlsLoop package (Padfield, 2016/2020). The maximum growth rates (r (h−1), hereafter simply r, or maximum growth rate) for each incubated culture (see section 2.3) were calculated by fitting the logistic growth equation to the OD600 measurements, using non-linear least squares regression. Nt = K/(1 +〖Ae〗^(-rt) ); A = (K - N_0)/N0 (1) In equation 1, Nt is the biomass at time, t, K is the carrying capacity, N0 is the starting biomass and r is the exponential population growth rate (r(h−1)). For some cultures, after reaching carrying capacity there would be a slow decline in cell density. As the above model cannot estimate this decline, these datapoints demonstrating a post-asymptote decline were removed. Statistical analysis All statistical analyses were conducted in R version 4.0.2 (R Core Team, 2021), and all plots were created using ggplot2, and other tidyverse (Wickham et al., 2019) packages were used for data handling. For all analyses, monoculture-evolved isolates were only included if their respective isolate had survived to the end of the community evolution experiment. For example, at an evolution temperature of 33°C, only Aeromonas spp. and Herbaspirillum spp. survived to the end of the evolution experiment, therefore only Aeromonas spp. and Herbaspirillum spp. isolates that were evolved at 33°C in monoculture were included in the analysis, and Pseudomonas spp., Serratia spp., and Janthinobacterium spp. isolates that were evolved at 33°C in monoculture were excluded from the analysis. This prevented a survivorship bias from confounding the results. For the within-taxon analysis, separate generalised additive mixed-effect models (GAMMs) were fit for each taxon, using the function uGamm from the R package MuMIn (Bartoń, 2022). The initial full model included maximum growth rate as the response variable, and the following fixed effects and smoothing terms: evolution temperature, treatment (monoculture, ancestral, or community evolved), an interaction between evolution temperature and treatment, and a smoothing term on growth temperature, which was allowed to vary by treatment. A single random effect encompassing taxon and biological replicate (at the level of each evolved lineage) was included in all models. All possible sub-models were created and compared by their sample-corrected Akaike information criterion (AICc) using the function AICc from the package MuMIn, although models without a smoothing term on growth temperature were not considered. The threshold for determining a significant difference between models was when ΔAICc was >2. Where there were one or more models falling within 2 ΔAICc of the lowest AICc model, the more minimal model was selected as the best model. The R package emmeans (Lenth, 2017/2023) was used to conduct post-hoc pairwise comparisons for model estimates across both evolution temperatures and treatment group. For the ‘all taxa combined’ analysis, model creation and selection was conducted in the same way as the within taxon analysis. Fixed and random effects were the same as in the within taxon analysis. However, due to issues with rank deficiency when trying to incorporate ancestral data into this model, a separate model for the effect of growth temperature on growth rate for the ancestor was constructed. This negates pairwise significance testing of differences between ancestral and evolved lineages but does allow both visual comparison of TPCs by superimposing the ancestral model predictions onto a figure displaying the predictions for the monoculture and community evolved isolates (Figure 1). For the community survival analysis, binomial Generalised linear models were fit using the base R glm function, and fixed effects taxon identify and evolution temperature. Fixed effects were determined to be significant if the ΔAICc of their removal was >2. Microbes are key drivers of global biogeochemical cycles and their functional roles are heavily dependent on temperature. Large population sizes and rapid turnover rates mean that the predominant response of microbes to environmental warming is likely to be evolutionary, yet our understanding of evolutionary responses to temperature change in microbial systems is rudimentary. Natural microbial communities are diverse assemblages of interacting taxa. However, most studies investigating the evolutionary response of bacteria to temperature change are focused on monocultures. Here we utilise high throughput experimental evolution of bacteria in both monoculture and community contexts along a thermal gradient to determine how interspecific interactions influence the thermal adaptation of community members. We found that community-evolved isolates tended towards higher maximum growth rates across the temperature gradient compared to their monoculture-evolved counterparts. We also saw little evidence of systematic evolutionary change in the shapes of bacterial thermal tolerance curves along the thermal gradient. However, the effect of community background and selection temperature on the evolution of thermal tolerance curves was variable and highly taxon-specific – with some taxa exhibiting pronounced changes in thermal tolerance, while others were less impacted. We also found that temperature acted as a strong environmental filter, resulting in the local extinction of taxa along the thermal gradient, implying that temperature-driven ecological change was a key factor shaping the community background upon which evolutionary selection can operate. These findings offer novel insight into how the community background impacts thermal adaptation.
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more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5061/dryad.vq83bk41b&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2020Publisher:Springer Science and Business Media LLC Setareh Katircioglu; Najia Saqib; Salih Katircioglu; Ceyhun C. Kilinc; Hasan Gul;This study searches the impact of tourism growth on emission pollutants in Cyprus (north), which is a small island in the Mediterranean and has shown significant development in hotel and casino sectors in the last two decades. Results from time-series analyses reveal that an inverted U-shaped EKC hypothesis is confirmed for Cyprus with and without tourism development. Tourism also exerts positively significant and long-term effects on the levels of carbon emissions, revealing that growth in the tourism sector causes degradation in the environment.
Air Quality Atmosphe... arrow_drop_down Air Quality Atmosphere & HealthArticle . 2020 . Peer-reviewedLicense: Springer TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s11869-020-00803-z&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 59 citations 59 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!
more_vert Air Quality Atmosphe... arrow_drop_down Air Quality Atmosphere & HealthArticle . 2020 . Peer-reviewedLicense: Springer TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s11869-020-00803-z&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2020Publisher:Elsevier BV Nabeel Ahmad; Nabeel Ahmad; Nasir Shehzad; Usama Ahmed; Ibrahim M. Maafa; Murid Hussain; Parveen Akhter; Um-e-Salma Amjad; Nauman Ahmad; Momina Javaid;Abstract Liquefaction of poly-isoprene based rubber (PIR) was performed using ethanol as a solvent for the production of liquid fuel and chemicals. An autoclave batch reactor was used to perform the ethanolysis of PIR at different temperature ranges (250–375 °C), with different ethanol to PIR ratio (0.5:1 to 4:1), and at different reaction times (15–75mins). The experimental results showed that a maximum yield of 86 wt % was achieved at temperature of 325 °C, ethanol to PIR ratio 1/1, and reaction time of 30 min. This liquid oil yield is about 14% higher than the yield obtained from the pyrolysis of PIR at 500 °C and about 10% higher than the yield obtained from hydrothermal liquefaction of PIR at 375 °C. Moreover, the utilization of ethanol in the process was also incorporated and product yields were redefined. Furthermore, ethanol contributed to enhance the quality of liquid-oil, particularly in term of viscosity, acidity, and energy density. Furthermore, the FTIR analysis showed methyl and methylene were most dominating functional groups found in the liquid product and GCMS analysis identified that they were presented by alkenes, aromatics, and alkyls.
add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.energy.2019.116543&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 19 citations 19 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.energy.2019.116543&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2021Publisher:Foundation of Computer Science Authors: Mohammad S. Khrisat; Hatim Ghazi Zaini; Ziad Alqadi;add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5120/ijca2021921361&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 1 citations 1 popularity Average influence Average impulse Average Powered by BIP!
more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5120/ijca2021921361&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2020Publisher:MDPI AG Authors: Mohd. Ahmed; Javed Mallick; Saeed AlQadhi; Nabil Ben Kahla;doi: 10.3390/su12198110
The development of a concrete mixture design process for high-quality concrete production with sustainable values is a complex process because of the multiple required properties at the green/hardened state of concrete and the interdependency of concrete mixture parameters. A new multicriteria decision making (MCDM) technique based on Technique of Order Preference Similarity to the Ideal Solution (TOPSIS) methodology is applied to a fuzzy setting for the selection of concrete mix factors and concrete mixture design methods with the aim towards sustainable concrete quality management. Three objective properties for sustainable quality concrete are adopted as criteria in the proposed MCDM model. The seven most dominant concrete mixture parameters with consideration to sustainable concrete quality issues, i.e., environmental (density, durability) and socioeconomic criteria (cost, optimum mixture ingredients ratios), are proposed as sub-criteria. Three mixture design techniques that have potentiality to include sustainable aspects in their design procedure, two advanced and one conventional concrete mixture design method, are taken as alternatives in the MCDM model. The proposed selection support framework may be utilized in updating concrete design methods for sustainability and in deciding the most dominant concrete mix factors that can provide sustainable quality management in concrete production as well as in concrete construction. The concrete mix factors found to be most influential to produce sustainable concrete quality include the water/cement ratio and density. The outcomes of the proposed MCDM model of fuzzy TOPSIS are consistent with the published literature and theory. The DOE method was found to be more suitable in sustainable concrete quality management considering its applicable objective quality properties and concrete mix factors.
add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/su12198110&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 12 citations 12 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/su12198110&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu