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Transition metal dichalcogenide (TMD) monolayers and their heterostructures have attracted considerable attention due to their distinct properties. In this work, we performed a systematic investigation of MoS2/WSe2 heterostructures, focusing on their temperature-dependent Raman and photoluminescence (PL) characteristics in the range of 79 to 473 K. Our Raman analysis revealed that both the longitudinal and transverse modes of the heterostructure exhibit linear shifts towards low frequencies with increasing temperatures. The peak position and intensity of PL spectra also showed pronounced temperature dependency. The activation energy of thermal-quenching-induced PL emissions was estimated as 61.5 meV and 82.6 meV for WSe2 and MoS2, respectively. Additionally, we observed that the spectral full width at half maximum (FWHM) of Raman and PL peaks increases as the temperature increases, and these broadenings can be attributed to the phonon interaction and the expansion of the heterostructure’s thermal coefficients. This work provides valuable insights into the interlayer coupling of van der Waals heterostructures, which is essential for understanding their potential applications in extreme temperatures.

We use the free software R (version 4.2.0) with R packages (foreach, nlme, plyr, dplyr) to analyse these datasets. R codes are also provided.Funding provided by: Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)Crossref Funder Registry ID: http://dx.doi.org/10.13039/501100019651Award Number: SMSEGL20SC02Funding provided by: Universitetet i BergenCrossref Funder Registry ID: http://dx.doi.org/10.13039/501100005036Award Number: FILAMO mobility grantFunding provided by: Leverhulme TrustCrossref Funder Registry ID: http://dx.doi.org/10.13039/501100000275Award Number: RPG-2020-389Funding provided by: National Science FoundationCrossref Funder Registry ID: http://dx.doi.org/10.13039/100000001Award Number: OCE-1736635 Conventional analyses suggest the metabolism of heterotrophs is thermally more sensitive than that of autotrophs, implying that warming leads to pronounced trophodynamic imbalances. However, these analyses inappropriately combine within- and across-taxa trends. We present a novel mathematic framework to separate these, revealing that the higher temperature sensitivity of heterotrophs is mainly caused by within-taxa responses which account for 92% of the difference between autotrophic and heterotrophic protists. This dataset contains both the datasets and R codes of per capita growth rates of autotrophic and heterotrophic protists as well as heterotrophic bacteria and insects. The datasets of per capita growth rates against temperature were compiled from the literature. Experimental data were included if they met the following criteria: at least 3 data points with positive growth rate (µ) and at least 2 unique temperatures at which positive µ were measured. To calculate apparent activation energy, we also removed data points with nonpositive µ and those with temperatures above the optimal growth temperature (defined as the temperature corresponding to the maximal µ).

AbstractConventional analyses suggest that the metabolism of heterotrophs is thermally more sensitive than that of autotrophs, implying that warming leads to pronounced trophodynamic imbalances. However, these analyses inappropriately combine within- and across-taxa trends. Our new analysis separates these, revealing that 92% of the difference in the apparent thermal sensitivity between autotrophic and heterotrophic protists does indeed arise from within-taxa responses. Fitness differences among taxa adapted to different temperature regimes only partially compensate for the positive biochemical relationship between temperature and growth rate within taxa, supporting the hotter-is-partially-better hypothesis. Our work highlights the importance of separating within- and across-taxa responses when comparing temperature sensitivities between groups, which is relevant to how trophic imbalances and carbon fluxes respond to warming.

To compare the effects of low- and high-temperature thermal-alkaline pretreatments (LTTAP, 60 +/- 1 degrees C, pH 12.0 +/- 0.1, 30 min and HTTAP, 160 +/- 1 degrees C, pH 12.0 +/- 0.1, 30 min, respectively) on anaerobic digestion (AD) of waste activated sludge, long-term and semi-continuous experiments were conducted in three laboratory continuous stirred tank reactors. The experimental results showed that the two pretreatments increased the methane yield of sludge from 89.20 +/- 2.41 mL/g added volatile solids (VS) to 117.50 +/- 5.27 mL/g added VS (LTTAP) and 156.40 +/- 2.99 mL/g added VS (HTTAP). After AD, the reduction of sludge (volatile solid) increased from 32.91 +/- 0.27% to 44.17 +/- 1.53% (LTTAP), and 50.86 +/- 1.18% (HTTAP), and the abundance of pathogenic bacteria decreased from 6.53% to 0.38% (LTTAP) and 0.14% (HTTAP). LTTAP enhanced both hydrogentrophic and acetoclastic methanogenis and HTTAP only enhanced acetoclastic methanogenis. Additionally, the energy efficiency of HTTAP and its subsequent AD was lower than that of LTTAP and its subsequent AD.

Conventional analyses suggest the metabolism of heterotrophs is thermally more sensitive than that of autotrophs, implying that warming leads to pronounced trophodynamic imbalances. However, these analyses inappropriately combine within- and across-taxa trends. We present a novel mathematic framework to separate these, revealing that the higher temperature sensitivity of heterotrophs is mainly caused by within-taxa responses which account for 92% of the difference between autotrophic and heterotrophic protists. This dataset contains both the datasets and R codes of per capita growth rates of autotrophic and heterotrophic protists as well as heterotrophic bacteria and insects. The datasets of per capita growth rates against temperature were compiled from the literature. Experimental data were included if they met the following criteria: at least 3 data points with positive growth rate (µ) and at least 2 unique temperatures at which positive µ were measured. To calculate apparent activation energy, we also removed data points with nonpositive µ and those with temperatures above the optimal growth temperature (defined as the temperature corresponding to the maximal µ). We use the free software R (version 4.2.0) with R packages (foreach, nlme, plyr, dplyr) to analyse these datasets. R codes are also provided.

To compare the effects of low- and high-temperature thermal-alkaline pretreatments (LTTAP, 60 +/- 1 degrees C, pH 12.0 +/- 0.1, 30 min and HTTAP, 160 +/- 1 degrees C, pH 12.0 +/- 0.1, 30 min, respectively) on anaerobic digestion (AD) of waste activated sludge, long-term and semi-continuous experiments were conducted in three laboratory continuous stirred tank reactors. The experimental results showed that the two pretreatments increased the methane yield of sludge from 89.20 +/- 2.41 mL/g added volatile solids (VS) to 117.50 +/- 5.27 mL/g added VS (LTTAP) and 156.40 +/- 2.99 mL/g added VS (HTTAP). After AD, the reduction of sludge (volatile solid) increased from 32.91 +/- 0.27% to 44.17 +/- 1.53% (LTTAP), and 50.86 +/- 1.18% (HTTAP), and the abundance of pathogenic bacteria decreased from 6.53% to 0.38% (LTTAP) and 0.14% (HTTAP). LTTAP enhanced both hydrogentrophic and acetoclastic methanogenis and HTTAP only enhanced acetoclastic methanogenis. Additionally, the energy efficiency of HTTAP and its subsequent AD was lower than that of LTTAP and its subsequent AD.

The dissolution of thermally activated serpentine (75% dehydroxylated) by direct flue-gas mineralization was investigated at far-from-equilibrium (w.r.t mineral dissolution) flow-through operating conditions. Experiments were performed at moderate partial pressures of CO2 (0.1 bar 2 bar CO2) and temperatures (30 °C 90 °C). Thermal activation enabled the dissolution of serpentine at mildly acidic conditions. Both magnesium and silica were released upon dissolution. However, the silica conversion was under-stoichiometric with respect to magnesium. Fast initial dissolution rates were observed with magnesium conversions reaching 60% in 30 min. Experiments were also performed in the absence of CO2 with identical pH conditions generated with mineral acid (HCl). The dissolution profiles were similar to those obtained under flue-gas atmosphere. GHGT-11 Proceedings of the 11th International Conference on Greenhouse Gas Control Technologies Energy Procedia, 37 ISSN:1876-6102

In this paper, newly developed tellurium-based [(Ga2Te3)34(SnTe)66]100-x-Snx amorphous alloys were prepared by the melt-spun method, with a linear velocity of 40 m/s and injection pressure of 20 kPa under an Ar atmosphere. The glass-forming region was identified in the range of x = 0 to 10 mol%. The glass transition temperature Tg and crystallization onset temperature Tc decreased monotonically with the increasing Sn content in the whole compositional range, resulting in the decrease in the stability criterion ΔT from 33 K (S2) to 23 K (S10). The crystallization kinetics were systematically investigated based on the differential scanning calorimeter (DSC) under non-isothermal conditions. The activation energies of the S8 amorphous sample determined by Kissinger and Ozawa equations were Eg (201.1~209.6 kJ/mol), Ec (188.7~198.3 kJ/mol), Ep1 (229.8~240.1 kJ/mol) and Ep2 (264.2~272.6 kJ/mol), respectively. The microscopic structure of the S8 amorphous sample and its annealed glass-ceramics were also analyzed by X-ray diffraction (XRD), transmission electron microscopy (TEM) and selected-area electron diffraction (SAED). The crystalline products were identified as having a SnTe phase (primary crystalline phase) and Ga6SnTe10 phase, thus providing a promising candidate for the development of high-performance thermoelectric glass-ceramic materials.

We use the free software R (version 4.2.0) with R packages (foreach, nlme, plyr, dplyr) to analyse these datasets. R codes are also provided.Funding provided by: Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)Crossref Funder Registry ID: http://dx.doi.org/10.13039/501100019651Award Number: SMSEGL20SC02Funding provided by: Universitetet i BergenCrossref Funder Registry ID: http://dx.doi.org/10.13039/501100005036Award Number: FILAMO mobility grantFunding provided by: Leverhulme TrustCrossref Funder Registry ID: http://dx.doi.org/10.13039/501100000275Award Number: RPG-2020-389Funding provided by: National Science FoundationCrossref Funder Registry ID: http://dx.doi.org/10.13039/100000001Award Number: OCE-1736635 Conventional analyses suggest the metabolism of heterotrophs is thermally more sensitive than that of autotrophs, implying that warming leads to pronounced trophodynamic imbalances. However, these analyses inappropriately combine within- and across-taxa trends. We present a novel mathematic framework to separate these, revealing that the higher temperature sensitivity of heterotrophs is mainly caused by within-taxa responses which account for 92% of the difference between autotrophic and heterotrophic protists. This dataset contains both the datasets and R codes of per capita growth rates of autotrophic and heterotrophic protists as well as heterotrophic bacteria and insects. The datasets of per capita growth rates against temperature were compiled from the literature. Experimental data were included if they met the following criteria: at least 3 data points with positive growth rate (µ) and at least 2 unique temperatures at which positive µ were measured. To calculate apparent activation energy, we also removed data points with nonpositive µ and those with temperatures above the optimal growth temperature (defined as the temperature corresponding to the maximal µ).