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Environmental evolution recorded by lipid biomarkers from the Tawan loess-paleosol sequences on the west chinese Loess Plateau during the late Pleistocene

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Environmental evolution recorded by lipid biomarkers from th...

中国科学院地质与地球物理研究所第11届（2011年度）学术年会

作者： Fangming Zeng·Shuyuan Xiang·Kexin Zhang·Yulin Lu institute of Geology and Geophysics,Graduate University, chinese academy of sciences,Box 9825,beijing 100029,china Faculty of Earth sciences,State Key Lab of Geological Processes and Mineral resources,china University of Geosciences,Wuhan 430074,china Development and Research Center,china Geological Survey, beijing 100037,china

This study provides a reconstruction of the environmental evolution since 128 ka recorded by the lipid biomarkers of the C-C n-alkanes,the C-C n-alkan- 2-ones and the C-C n-alkanols isolated from the Tawan loess section,Northwest *** in paleoenvironment are reconstmcted from the values of the carbon preference index(CPI),the average chain length(ACL), the L/H(ratio of lower-molecular-weight to higher-molecular -weight homologues),the n-alkane C/C ratios,and the n-alkan-2-one C/C *** parameters indicate the dominance of grasses over the west chinese Loess Plateau(CLP) during the late Pleistocene. Lower values of the CPI and the ACL values,respectively, indicate stronger microbial reworking of organic matter and changes in plant species,which are both indicative of a warmer-wetter ***,the fluctuations of environment recorded in the Tawan section exhibit ten phases that show obvious cycles between warm periods and cold *** study reveals that changes in the biomarker proxies agree well with changes in the magnetic susceptibility and grain size,and it indicates a huge potential for paleoenvironmental reconstructions by using the n-alkan-2-one and n-alkanol proxies.

关键词： Loess Lipid biomarker Linxia Late Pleistocene Earth environment

microbial Fuel Cells with the Addition of Vanadyl Compounds for Performance Improvement

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Microbial Fuel Cells with the Addition of Vanadyl Compounds ...

The 4th Joint china/Japan Chemical Engineering Symposium

作者： DU Zhuweia LI Qinghaib TONG Menga LI Dingjiea LI Shaohuaa LI Haorana **aNational Key laboratory of Biochemical Engineering institute of Process Engineering chinese academy of sciences beijing 100080 chinabKey laboratory for Thermal Science and Power Engineering of Ministry of Education Tsinghua University beijing 100084 china

A microbial fuel cell was constructed with Rhodoferax ferrireducens, and effects of NaVO3 inanode chamber and cathodic eletron acceptor K3[VO（O2）2（OOC-COO）] （abbr. KVC） were studied in thepresent work. The highest current output of the MFC was 0.581mA, which was 0.272mA higher than that ofthe control experiment, with the addition of NaVO3 at the concentration of 4mmol/L in the anode chamberand the external resistance of 510?. KVC in the cathodic compartment also improved the performance of theMFC. The highest current of 0.949mA could be achieved at the KVC concentration of 25mmol/L. Thecurrent of the MFC was further enhanced to 1.06 mA whilst the NaVO3 catalyst and KVC catalyst wereadded to the anodic and cathodic compartments, respectively.

关键词： glucose Rhodoferax ferrireducens vanadium microbial fuel cell

钝齿棒杆菌天冬氨酸激酶基因的克隆和序列分析

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微生物学报 2002年第4期42卷 395-399页

作者：刘阳剑张英姿王绛王宇余志华丁久元中国科学院微生物研究所微生物生物技术中心北京100080

运用PCR方法 ,从野生型钝齿棒杆菌株 (Corynebacteriumcrenatum)AS1 5 4 2及具有AEC抗性的突变株CD945染色体上分别扩增出天冬氨酸激酶 (AK)基因 (ask) ,构建了重组质粒。核苷酸序列分析表明 ,C .crenatumAS1 5 4 2AK基因与C .crenatu... 详细信息

运用PCR方法 ,从野生型钝齿棒杆菌株 (Corynebacteriumcrenatum)AS1 5 4 2及具有AEC抗性的突变株CD945染色体上分别扩增出天冬氨酸激酶 (AK)基因 (ask) ,构建了重组质粒。核苷酸序列分析表明 ,C .crenatumAS1 5 4 2AK基因与C .crenatumCD945相比 ,第 1 1 99位的碱基由T变为C ,引起酶蛋白β亚基第 80位氨基酸从亮氨酸变成脯氨酸。该氨基酸的突变在蛋白结构上位于ACT结构域内 ,该区受赖氨酸调控。C .crenatumAS1 5 4 2的AK基因的编码区核苷酸序列与C .glutamicum、C .flavum及B .lactofermentum相比 ,同源性分别为 97 2 3 %、97 5 5 %和 97 6 2 % ,酶蛋白氨基酸序列的同源性分别为 99 76 %、99 5 2 %和 99 76 %。但在AK基因的启动子上游序列部分与其它棒杆菌相比有较大差异。

关键词：钝齿棒杆菌天冬氨酸激酶基因克隆序列分析赖氨酸 AEC抗性

microbial IRON ORE DEPOSITS IN XUANLONG AREA,NORTHWESTERN HEBEI,china

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MICROBIAL IRON ORE DEPOSITS IN XUANLONG AREA,NORTHWESTERN HE...

中国科学院地质与地球物理研究所2003学术年会

作者： DAI Yongding.ZHU Jingquan,LI Xiang and SHENG Jiying institute of Geology and Geophysics.chinese academy of sciences,P.O.Box 9825,beijing 100029,china

Six genera of iron bacteria and six genera of blue bacteria have been discovered in Xuanlong iron *** hematitized bacteria and hematite foliates comprised bacteria pelletal,silky,fibrous and clasty pelletal lamina,in turn,which made up oncolite,stromatolite and *** the cooperation of the iron and blue bacteria,a great deal of divalent iron brought into Xuanlong Gulf by upwelling ocean current were oxygenized,precipitated,concentrated and ore-formed at last.

关键词： iron and blue bacteria bacterial laminae microbolite upwelling current

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石油污染土壤植物-微生物修复研究进展

生态学杂志 2006年第1期25卷 93-100页

作者：蔺昕李培军台培东巩宗强张海荣中国科学院沈阳应用生态研究所

依据国内外近10年来有关石油污染土壤生物修复研究的成果,综合阐述了石油污染土壤的植物修复、微生物修复及植物-微生物联合修复方法研究,重点讨论植物-微生物联合作用,主要包括植物根际微生物、根分泌物以及菌根对石油污染物降解的影响... 详细信息

依据国内外近10年来有关石油污染土壤生物修复研究的成果,综合阐述了石油污染土壤的植物修复、微生物修复及植物-微生物联合修复方法研究,重点讨论植物-微生物联合作用,主要包括植物根际微生物、根分泌物以及菌根对石油污染物降解的影响,提出了污染土壤原位修复中需要重视的问题。

关键词：污染土壤石油微生物修复植物修复

microbial IRON ORE DEPOSITS IN XUANLONG AREA,NORTHWESTERN HEBEI,china

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MICROBIAL IRON ORE DEPOSITS IN XUANLONG AREA,NORTHWESTERN HE...

中国科学院地质与地球物理研究所2003学术年会

作者： DAI Yongding.ZHU Jingquan LI Xiang and SHENG Jiying institute of Geology and Geophysics.chinese academy of sciences P.O.Box 9825 beijing 100029 china

Six genera of iron bacteria and six genera of blue bacteria have been discovered in Xuanlong iron *** hematitized bacteria and hematite foliates comprised bacteria pelletal,silky,fibrou

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NisinZ的定点突变及突变体性质的研究

生物工程学报 2003年第2期19卷 185-189页

作者：袁静张振中杨巍陈秀珠还连栋中国科学院微生物研究所分子微生物学研究中心

以本实验室构建的含nisZ基因的质粒pHJ2 0 1为模板 ,采用定点突变技术将乳链菌肽Z分子中B环第 8位Thr突变为Ser(T8S)、将第 2位Dhb突变为Dha和第 31位His突变为Lys(T2S H31K)以及将第 2 7位Asn突变为Lys和第 31位His突变为Lys(N2 7K H31... 详细信息

以本实验室构建的含nisZ基因的质粒pHJ2 0 1为模板 ,采用定点突变技术将乳链菌肽Z分子中B环第 8位Thr突变为Ser(T8S)、将第 2位Dhb突变为Dha和第 31位His突变为Lys(T2S H31K)以及将第 2 7位Asn突变为Lys和第 31位His突变为Lys(N2 7K H31K) ,以pMG36e为载体 ,电击转化乳酸乳球菌 (L .lactis)NZ980 0进行表达。对表达产物性质的研究结果表明 ,3个突变体的抑菌谱和溶解度未发生变化 ,其抑菌活性略有下降 ,但它们的稳定性表现各不相同 :N2 7K H31K的稳定性与NisinZ几乎一致 ,而T8S和T2S H31K的稳定性有明显提高 ,在pH9条件下10 0℃加热 5min仍不丧失抑菌活性。

关键词：定点突变稳定性突变体性质质粒乳链菌肽

BSCTV C2 Attenuates the Degradation of SAMDC1 to Suppress DNA Methylation-mediated Gene Silencing

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BSCTV C2 Attenuates the Degradation of SAMDC1 to Suppress DN...

植物分子生物学与现代农业——2010全国植物生物学研讨会

作者： Zhonghui Zhang~(1,2,6),Hao Chen~(1,2),Xiahe Huang~1,Qingzhen Zhao~1,Jianbin Lai~(1,2), Kunling Teng~1,Yin Li~2,Liming Liang~2,Quansheng Du~3,Ran Xia~1,Xueping Zhou~4, Huishan Guo~3 and Qi Xie~(1,5) 1 State Key laboratory of Plant Genomics,National Center for Plant Gene Research,institute of Genetics and Developmental Biology,chinese academy of sciences,Datun Road,beijing 100101, china 2 State Key laboratory of Biocontrol,School of Life sciences,Sun Yat-sen(Zhongshan) University, 135 West Xin-gang Road,Guangzhou 510275,china 3 State Key laboratory of Plant Genomics,institute of microbiology,chinese academy of sciences, Datun Road,beijing 100101,china 4 State Key laboratory of Rice Biology,institute of Biotechnology,Zhejiang University,Hangzhou 310029,china

Plant viruses are excellent tools for studying microbial-plant interactions,as well as the complexities of host *** present study focused mainly on the role of C2 encoded by Beet severe curly top virus(BSCTV) in the v...

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Biogas recovery from microwave heated sludge by anaerobic digestion

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Science china(Technological sciences) 2010年第1期53卷 144-149页

作者： QIAO Wei1,WANG Wei2,ZHU CuiPing3 & ZHANG ZhongZhi1 1 College of Chemical Science and Engineering,china University of Petroleum,beijing 102249,china 2 Department of Environmental Science and Engineering,Tsinghua University,beijing 10084,china 3 J & K china Cleaning Energy Technology Co.Ltd.,beijing 100085,china College of Chemical Science and Engineering China University of Petroleum Beijing China Department of Environmental Science and Engineering Tsinghua University Beijing China J & K china Cleaning Energy Technology Co. Ltd. Beijing China

Biogas generated from sewage sludge,livestock waste,and food waste by anaerobic digestion is a valuable renewable energy ***,conventional anaerobic digestion is not an efficient process.A long hydraulic retention time and low biogas recovery rate hinder the applications of those *** effective pretreatment method to destroy sludge microbial cells has been one of the major concerns regarding improvement of the biogas *** article focuses on the effects of microwave heating on sludge anaerobic *** suspended solid(VSS) and chemical organic demand solubilization of heated sludge were *** heating was found to be a rapid and efficient process for releasing organic substrates from *** increase of organic dissolution ratio was not obvious when holding time was over 5 min with microwave *** effect of the VSS solubilization was primarily dependent on heating *** highest value of VSS dissolving ratio,36.4%,was obtained at 170°C for 30 *** COD dissolving ratio was about 25% at 170°*** organic carbon of treated sludge liquor was 1.98 and 2.73 g/L at 150°C and 170°C for 5 min,respectively.A biochemical methane potential(BMP) test of excess sludge and a mixture of primary and excess sludge demonstrated an increase in biogas *** total biogas from microwave treated mixture sludge increased by 12.9% to 20.2% over control after 30 days of *** production was 11.1% to 25.9% higher for excess sludge than for untreated *** VS removal ratios of mixture sludge and excess sludge were 12% and 11% higher,respectively,compared to the untreated sludge.

关键词： biogas recovery microwave heating sludge anaerobic digestion