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糖蜜是一种制糖的副产物,富含备类有机物,常被用作发酵底物制备备类化工品,但鲜有用于制备生物燃气的报道。本研究采用糖蜜为底物以液态连续进料的方式实现了厌氧发酵的快速启动,COD去除率达70%以上,沼气产率达0.65m^3/kg以上,沼气甲烷含量达80%以上。该工艺可克服传统固体/半固体沼气发酵启动周期长,产气效率低等缺点,因此具有一定的产业化潜力。

通过一维粒子模拟研究了利用相对论少周期强激光与固体密度等离子体表面相互作用实现单个孤立阿秒光脉冲产生的参数条件。主要研究描述相互作用的多维参数，如激光强度、入射角和等离子体标尺长度等，对相对论高次谐波能量转换效率和孤立阿秒光脉冲分离度的影响。研究发现，虽然激光等离子体参数对阿秒光脉冲产生的影响是复杂的，但是存在着能够实现大能量孤立阿秒光脉冲的最佳等离子体标尺长度和最佳入射角。当其他相互作用条件确定时，使用中等强度的相对论强激光可以在较宽的参数范围内实现孤立的阿秒光脉冲。大角度入射时，孤立阿秒光脉冲的分离度较高，能够实现孤立阿秒光脉冲的相互作用参数范围也较宽。The generation of single isolated attosecond light pulses from the interaction of relativistic few-cycle lasers with solid density plasma surfaces is investigated using one dimensional particle-in-cell simulations. The primary subject of the study is the effects of the multi-parameter combinations which uniquely define the laser plasma interactions, on the laser to relativistic high-order harmonic energy conversion efficiencies, and also on the single attosecond light pulse isolation degrees. Here these multi-parameters include laser intensities, incidence angles, plasma scale lengths, etc. The impact of laser-plasma interaction parameters on attosecond light pulse generations is generally complicated. However, there exist an optimal plasma scale length and an optimal incidence angle to efficiently generate high-order harmonics and intense attosecond light pulses. When other parameters are fixed, a moderately intense relativistic laser is more advantageous to realize isolated attosecond light pulses with a broad controlling parameters range. And a larger incidence angle favors a higher isolation degree as well as a broader range of controlling parameters towards the generation of intense isolated attosecond light pulses. Copyright © 2022 High Power Laser and Particle Beams. All rights reserved.

采用振动自洽场 -组态相互作用 (SCf-CI)方法通过实验振动光谱优化了 CO2 分子的势能函数 ,由该势能函数计算得到的纯振动光谱数据与实验值相比 ,所有能级的误差均在 4 CM- 1 以内 ,均方根偏差为 1 .50 CM- 1 ,所预测的 Π态振转光谱也与实验值很接近 . ; The potential energy surface for the electronic ground state of the CO\-2 molecule was optimized by using the self\|consistent field\|configuration interaction method and involving the 49 observed vibrational energy levels below 20 000 cm\+\{-1\}.The root\|mean\|square error of this fitting is 1.50 cm\+\{-1\}.The rovibrational energy levels for the \$Σ\$ and \$Π\$ vibrational states are calculated to test the refined potential. ; 国家自然科学基金!(批准号:29706115);国家教育部博士点基金!(批准号:97061002)资助

作者简介:张树河(1975 年—),男， 助理研究员。研究方向： 能源植物的选育及转化制生物燃料。 通讯作者： 龙敏南， E-mail:Longmn@xmu.edu.cn ; [中文文摘]以能源植物斑茅(Erianthus arundinaceus)为材料,对其纤维成分、产酶条件和糖化条件进行了分析。结果表明:斑茅含有纤维素43.77%、半纤维素28.57%、木质素11.01%;对斑茅进行预处理后,纤维中纤维素的含量提高至72.54%,半纤维素含量降低至13.02%,木质素的含量降低至3.34%。利用预处理的斑茅纤维进行固态发酵产酶,其最佳的产酶条件为:茅麸比1∶3,固液比1∶2,氮源(脲)0.75%,初始pH 5.0,32℃发酵培养72 h;相对于利用未经预处理的斑茅纤维为原料,其FPA酶活提高210.9%,达到20.74 U/g,CMC酶活提高239.1%,达到218.26 U/g。以纤维素酶对斑茅纤维进行糖化,糖化率达到40.60%。[英文文摘]Using energy plant Erianthus arundinaceus as the material,we analysed the fiber composition,enzyme production conditions and saccharification.The results showed that Erianthus arundinaceus consisted of 43.77% cellulose,28.57% hemicellulose and 11.01% lignin.After pretreatment,the cellulose content increased to 72.54%,while the hemicellulose and lignin content decreased to 13.02% and 3.34%,respectively.The optimal condition for solid-state fermentation to produce cellulase was: ratio of pretreated cellulose fibre to wheat bran 1 ∶ 3, ratio of solid to liquid 1:2, nitrogen source(urea)0.75%, initial pH 5.0, temperature 32 ℃ and fermentation time 72 h. When using the pretreated fibre as the carbon source, the FPA activity and CMC activity increased 210.9% and 239.1%, respectively. The pretreated fibre was used for saccharification under the optimal condition with a yield of 40.60%. ; 国际科技合作重点项目(No.2009DFA60930);; 国家自然科学基金(No.31170067)资助

气候变化成为国际社会关注的重点,各权威机构及学者纷纷研究气候变化及其对经济的影响。本文以斯特恩评论的框架,结合有关研究资料分析东南亚的气候变化,包括气温、降雨量、极端气候事件和海平面的变化及趋势,评介这些气候变化对东南亚经济,包括对水资源、农业、林业、沿海及海洋资源和人类健康等5个方面的影响及发展趋势。 ; Recent years have seen the emergence of many studies aimed at quantifying the economic impact of climate change and global warming.The paper applies the Stern approach to Southeast Asia countries,analyzing climate change,including temperature,precipitation,extreme weather events and sea levels in these countries,and reviewing its economic impact on these countries in 5 fields: water resources,agriculture,forestry,coastal and marine resources and human health.

资源耗竭和环境污染已经成为中国可持续发展的严重制约，特别是雾霾等环境问题的大面积集中爆发，更是将这一问题摆在了公众和政府的面前。但是，对于中国这样的发展中大国，“发展是第一要务”，因为解决十三亿人口的吃饭和就业问题都离不开经济较快增长。如何在稳增长、资源节约、环境友好这三者之间的权衡取舍是政府面临的难题。因此，对于中国社会经济的可持续发展，关键是在兼顾经济增长的同时尽可能实现资源节约和环境改善。这就需要实现绿色经济增长的转型。 另一方面，气候目标成为中国经济发展的约束条件。在2014年11月的中美联合声明中，中国首次提出“计划2030年左右二氧化碳排放达到峰值且将努力早日达峰”，这是中国政府. ; Resource depletion and environmental degradation have become big challenges for China's sustainable development. In particular, as the terrible haze appeared in large areas of China, resources and environmental constraints become an unavoidable problem. However, as the largest developing county with over 1.3 billion people, economic development is the first priority, which is the requirement of em. ; 学位：经济学博士 ; 院系专业：经济学院_能源经济学 ; 学号：31320120153666

自改革开放以来，伴随着经济的快速发展，中国城市化进程加速推进，城市化与工业化相互促进，对资源与环境带来了前所未有的压力。为应对国际上要求中国减少二氧化碳排放的压力，研究中国城市化水平与碳排放量之间的关系显得尤为必要。但目前大多数的研究没有考虑空间相互作用的影响，仅从整体上研究中国城市化与二氧化碳排放之间的关系，这不能反映我国各地区城市化与二氧化碳排放的真实关系。因此，本文将通过运用空间计量模型来研究城市化对碳排放量的影响，以能更全面客观地反映经济现实，并丰富现有的研究文献。 本文采取全局空间相关性指数Moran'sI及其散点图对各省份的碳排放在空间上是否存在自相关及集群现象进行了检验。为了弥. ; China has experienced fast-paced economic growth with rapid urbanization since the reforming and opening up in the late 1970s,rapid urbanization has posed some tremendous challenges related to environmental pressure,including CO2 emissions. To address these challenges,further study on the relationship between urbanization and CO2 emissions is necessary. China is vast in territory,with accelerating. ; 学位：经济学硕士 ; 院系专业：经济学院_发展经济学 ; 学号：15320121152007

研究了以能量转移作为核酸荧光探针的可能性，提出利用能量转移体系测定dnA的新方法.该方法灵敏、快速，重现性好，dnA测定的线性范围是0.05~10Mg/l，检测限为0.047Mg/lCTdnA（n＝11）. ; The possibility of energy transFer between FL and ST systems as a Fluorescent probe For deoxyribonucleic acid was investigated, and based on the energy transFer systems a novel Fluorescence method For the determination of double strands DNA has been presented.This method is sensitive, rapid and reproducible.Linearity is observed in the range 0.05 ～ 10 mg/L CT DNA, the limit of detection is 0.047 mg/L CT DNA ( n =11). ; 国家自然科学基金

采用紫外线照射的方法对巴氏杜氏藻Dunaliella bardawilH-42(简称H-42)进行诱变.通过小剂量乙醚抽提、索氏法提取和氯仿提取分析,得到两株总脂含量显著高于原出发株的突变株,分别命名为D.bardawilH-42 var.HL-1(简称HL-1)和D.bardawilH-42 var.HL-2(简称HL-2).研究表明,HL-1和HL-2的总脂含量可达细胞干质量的21.1%和20.5%,分别比对照提高了31.1%和27.3%.初步分析了HL-1和HL-2的生物质油主要组分,它们的氯仿沥青"A"(相当于原油)含量分别比对照提高了10.6%和11.8%,具有良好的生物质能源开发前景.随机扩增多态性DNA(RAPD)分析表明:HL-1和HL-2与H-42的遗传相似系数为分别为0.797和0.718,由此确认HL-1和HL-2均为H-42的高脂突变株. ; Two mutant strains of Dunaliella bardawil.H-42(H-42),with the character of high lipid-content,have been isolated and identified after ultraviolet radiation.They were denominated as D.bardawil H-42 var.HL-1(HL-1)and D.bardawil H-42 var.HL-2(HL-2),respectively.Total lipid contents were determined by the Soxhlet procedure.Contents and the main compositions of biodiesel of the two mutant strains were analyzed by geochemistry experimental technology.The results showed that total lipid contents of HL-1 and HL-2 were 21.1% and 20.5%(dry mass),which were increased as high as 31.1% and 27.3%,respectively.The RAPD test revealed that the genetic similarity between H-42 and its mutant strain HL-1 was 0.797,while H-42 and HL-2 was 0.718.Quantities of the chloroform extracts "A" from high lipid mutants HL-1 and HL-2 were enhanced more than 10% to their original species H-42.So the evidence mentioned above proved that both HL-1 and HL-2 were experimentally tested to be the mutant strains derived from H-42 and provided a new character of high content of lipid.They may be very good candidates for source of oil-producing microalgae. ; 福建省重大专项前期研究项目(2005YZ1022)资助

2002-2003 > Academic research: refereed > Publication in refereed journal ; Version of Record ; Published