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| 1 | Latitudinal variations of CPI values of long-chain n-alkanes in surface soils:Evidence for CPI as a proxy of aridity显示文摘Carbon preference index (CPI) of long-chain n-alkanes preserved in surface soil increases gradually from southeastern China to the north margin of Loess Plateau.Along this latitudinal transect,the CPI value correlates to relative humidity,precipitation,and temperature with a negative linear relationship,respectively,whereas the correlation of CPI to temperature is relatively weak.In the Wuyi,Shennongjia,and Tianshan Mountains,CPI values do not change systemically with altitude increasing (or temperature decreasing).However,mean value of CPI for the individual mountain increases in turn from the humid mountain to the arid.These results jointly suggest that aridity (or humidity) is a dominate climate factor in altering soil CPI value.High CPI values of geological records therefore indicate the arid paleoclimate.Though long-chain n-alkanes in soil are derived mainly from leaf wax of terrestrial vascular plants,the regular latitudinal variations of soil CPI might not be caused by the change of vegetation.We speculate that increased long-chain n-alkanes from microbes and/or enhanced biodegradation in the humid climate lead to the decrease of soil CPI. | LUO Pan PENG PingAn LV HouYuan ZHENG Zhuo WANG Xu | 2012 | Science China Earth Sciences2012，55，7： | 12 |
| 2 | Branched glycerol dialkyl glycerol tetraethers and paleoenvironmental reconstruction in Zoigê peat sediments during the last 150 years显示文摘Branched glycerol dialkyl glycerol tetraethers (GDGTs) were analyzed in peat samples taken from the Zoigê grassland, located on the eastern margin of the Qinghai-Tibetan Plateau. The mean annual air temperature (MAAT) and pH in the 210 Pb-dating peat core were reconstructed based on the cyclization of branched tetraethers (CBT) and methylation of branched tetraethers (MBT) indices for the last 150 years. The results showed that the MAAT and pH values involved three stages of variation over the last 150 years. The pH was stable and the MAAT decreased slowly by about 1°C from 1851 to 1927. The pH decreased rapidly by 0.6 and the MAAT decreased significantly by 2.5°C between 1927 and 1979. The pH and MAAT increased by 0.8 and 5°C, respectively, since the 1980s. The reconstructed temperatures correspond well to the mean winter temperatures reconstructed using tree-rings from the Jiuzhaigou Valley, situated at the boundary between the Qinghai-Tibetan Plateau and the Sichuan Basin. The estimated MAAT was similar to the temperatures reconstructed using tree-rings, indicating an increasing trend, as shown by local instrumental records from 1957 to 2001. These results provide further confidence in the application of proxies based on glycerol dialkyl glycerol tetraethers in peat records for continental paleoclimate reconstruction. | ZHOU HaoDa HU JianFang MING LiLi PENG PingAn ZHANG Gan | 2011 | Chinese Science Bulletin2011，56，23： | 9 |
| 3 | Carbon isotopic compositions of 1,2,3,4-tetramethylbenzene in marine oil asphaltenes from the Tarim Basin:Evidence for the source formed in a strongly reducing environment显示文摘Although 1-alkyl-2,3,6-trimethylbenzenes and a high relative amount of 1,2,3,4-tetramethylbenzene have been detected in marine oils and oil asphaltenes from Tabei uplift in the Tarim Basin, their bio-logical sources are not determined. This paper deals with the molecular characteristics of typical ma-rine oil asphaltenes from Tabei and Tazhong uplift in the Tarim Basin and the stable carbon isotopic signatures of individual compounds in the pyrolysates of these asphaltenes using flash pyrolysis-gas chromatograph-mass spectrometer (PY-GC-MS) and gas chromatograph-stable isotope ratio mass spectrometer (GC-C-IRMS), respectively. Relatively abundant 1,2,3,4-tetramethylbenzene is detected in the pyrolysates of these marine oil asphaltenes from the Tarim Basin. δ 13C values of 1,2,3,4-tetrame-thylbenzene in the pyrolysates of oil asphaltenes vary from-19.6‰ to-24.0‰, while those of n-alkanes in the pyrolysates show a range from-33.2‰ to-35.1‰. The 1,2,3,4-tetramethylbenzene in the pyro-lysates of oil asphaltenes proves to be significantly enriched in 13C relative to n-alkanes in the pyro-lysates and oil asphaltenes by 10.8‰―15.2‰ and 8.4‰―13.4‰, respectively. This result indicates a contribution from photosynthetic green sulfur bacteria Chlorobiaceae to relatively abundant 1,2,3,4-tetramethylbenzene in marine oil asphaltenes from the Tarim Basin. Hence, it can be speculated that the source of most marine oil asphaltenes from the Tarim Basin was formed in a strongly reducing water body enriched in H2S under euxinic conditions. | JIA WangLu PENG PingAn XIAO ZhongYao | 2008 | Science China Earth Sciences2008，51，4： | 4 |
| 4 | Primary migration and secondary alteration of the Upper Paleozoic gas reservoir in Ordos Basin,China―Application of fluid inclusion gases显示文摘The composition of fluid inclusions(FI)often represents the initial geochemical characteristics of palaeo-fluid in reservoir rock.Influence on composition and carbon isotopic composition of gas during primary migration,reservoir-forming and subsequent secondary alterations are discussed through comparing fluid inclusion gas with coal-formed gas and natural gas in present gas reservoirs in the Ordos Basin.The results show that primary migration of gas has significant effect on the molecular but not on the carbon isotopic composition of methane.Migration and diffusion fractionation took place during the secondary migration of gas in Upper Paleozoic gas reservoir according to carbon isotopic composition of methane in FIs.Composition and carbon isotopic composition of natural gas were nearly unchanged after the gas reservoir forming through comparing the FI gases with the natural gas in present gas reservoir. | GONG Se 1,2 ,PENG PingAn 1 ,SHUAI YanHua 3 ,DAI JinXing 3 &ZHANG WenZheng 4 1 Guangzhou Institute of Geochemistry,the Chinese Academy of Sciences,Guangzhou 510640,China 2 Common Wealth Scientific and Research Organization,Petroleum Resources,PO Box 136,North Ryde,New South Wales,1670,Australia 3 Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China 4 Research Institute of Exploration and Development,Changqing Petroleum Corporation,Xi’an 710021,China | 2008 | Science China Earth Sciences2008，51，S1： | 3 |
| 5 | The sources and formation processesof brines from the Lunnan Ordovician paleokarst reservoir, TarimBasin, northwest China 显示文摘 | Chen Jian Liu Dayong Peng Pingan Yu Chiling ZhangBaoshou Xiao Zhongyao | 2013 | Geofluids2013，13，38： | 1 |
| 6 | Peculiarities of salt lake sediments as potential source rocks in China显示文摘 | Fu Jiamo Sheng Guoying Peng Pingan Brassell S C Eglinton G Jiang Jigang | 1986 | Org Geochem1986，10，13： | 1 |
| 7 | Up-regulation of the MyD88-dependent pathway of TLR signaling in spleen and caecum of young chickens infected with Salmonella serovar Pullorum显示文摘 | Peng Li Pingan Xia Jie Wen Maiqing Zheng Jilan Chen Jingpeng Zhao Ruirui Jiang Ranran Liu Guiping Zhao | 2009 | Veterinary Microbiology2009，，2： | 1 |
| 8 | Identification and formation of sulfur-containing steroids in sulfur-rich heavy oils in the Jinxian Sag,Bohai Bay Basin,North China显示文摘High abundant sulfur-containing steroids were identified and detected in saturate hydrocarbon fractions of heavy oil with a high sulfur content in the Jinxian Sag,Bohai Bay Basin,North China.These sulfur-containing steroids were structurally merged into the D-ring of steroid nucleus with thiophene ring and/or combined into the C-22 in the side-chain.Based on the previous reports of sulfur-containing steroids with methylthio-steroids and intra-molecular form,four formation mechanisms of sulfur-containing steroids and diagenetic pathway of steroids under S-rich conditions were proposed in this paper according to the double bond positions in the sterene compounds.Hydrogenation and sulfurization both occurred in the diagenetic processes of olefinic bond in the side-chain of steroids:abiogenic chemical hydrogenation of H2S and HS-leads to the formation of regular steranes;a successful sulfurization process leads to the formation of the side-chain sulfur-containing steroids whereas unsuccessful cyclization and/or sulfurization result in the generation of short-chain steranes.This kind of mechanism of hydrogenation/sulfurization of side-chain olefinic bond provides a potential genesis clue for the occurrence of high abundance of short-chain steranes(higher than the common regular steroids,phytane and n-alkanes)in S-rich heavy oils and source rocks in the Jinxian Sag,Bohai Bay Basin,North China. | LU Hong WANG QingTao JIANG LinXiang ZHANG Hui LIU JinZhong SHENG GuoYing PENG PingAn | 2013 | Science China Earth Sciences2013，56，11： | 1 |
| 9 | Influence of biochars on plant uptake and dissipation of two pesticides in an agricultural soil显示文摘 | Yang Xiaobing Ying Guangguo Peng Pingan | 2010 | Journal of Agricultural and Food Chemistry2010，58，13： | 1 |
| 10 | Agrobacterium -mediated genetic transformation and regeneration of transgenic plants using leaf midribs as explants in ramie [ Boehmeria nivea (L.) Gaud]显示文摘 | Xia An Bo Wang Lijun Liu Hui Jiang Jie Chen Shengtuo Ye Leiyu Chen Pingan Guo Xing Huang Dingxiang Peng | 2014 | Molecular Biology Reports2014，，5： | 1 |
| 11 | Influence of biochars on plant uptake and dissipation of two pesticides in an agricultural soil显示文摘 | Yang Xiaobing Ying Guangguo Peng Pingan | 2010 | Journal of Agricultural and Food Chemistry2010，58，13： | 1 |
| 12 | Flexible and flame-retarding phosphorylated MXene/polypropylene composites for efficient electromagnetic interference shielding显示文摘Flame-retardant composites with high electromagnetic interference(EMI)shielding performance are desirable for electronic device packaging.Despite great potential of MXene for high EMI,it still remains a great challenge to develop high-performance flame-retardant polymer/MXene composites with excellent EMI shielding effectiveness because of the poor oxidative stability of MXene.Herein,phosphorylated MXene/polypropylene(PP)composites are prepared by coating phosphorylated MXene on PP fabric followed by spraying polyethylenimine(PEI)and hot-pressing.The phosphorylated MXene proves to be more durable against oxidation than pure MXene due to the protection effect of polyphosphates.Upon hot-pressing,melted PP fibers are fused together at their contact points and thus as-prepared composites are bi-continuous with two interpenetrating phases.The composites show significantly improved thermal stability and flame retardancy relative to pure PP,with a low total heat release(THR)of 3.7 kJ/g and a heat release rate(HRR)of 50.0 W/g,which are reduced by 78%and 87%,respectively.In addition,the composites exhibit a high electrical conductivity of~36,700 S/m and an EMI shielding performance of~90 d B over the whole frequency range of 8–12 GHz with a thickness of~400μm.The as-developed PP/MXene composites hold great promise for reliable protection of next-generation electronic devices working in complex environments. | Tingting Tang Shanchi Wang Yue Jiang Zhiguang Xu Yu Chen Tianshu Peng Fawad Khan Jiabing Feng Pingan Song Yan Zhao | 2022 | Journal of Materials Science & Technology2022，，16： | 1 |
| 13 | Application of biological markers in the assessment of paleoenvironments of Chinese non- marine sediments 显示文摘 | Fu Jiamo Sheng Guoying Xu Jiayou Egiinton G Gowar A P Jia Rngfen Fan Shanfa Peng Pingan | 1990 | Org Geochem1990，16，46： | 1 |
| 14 | Peculiarities of salt lake sediments as potential source rocks in China显示文摘 | Fu Jiamo Sheng Guoying Peng Pingan | 1986 | Organic Geochemistry1986，10，： | 1 |
| 15 | Interfacial enhancement of carbon fiber composites by poly(amido amine) functionalization显示文摘 | Qingyu Peng Yibin Li Xiaodong He Hongzhen Lv Pingan Hu Yuanyuan Shang Chao Wang Rongguo Wang Thirumany Sritharan Shanyi Du | 2013 | Composites Science and Technology2013，，： | 1 |
| 16 | Compound specific stable carbon isotope anlysis as a tool for correlating coal sourced oils and interbedded shale-sourced oils in coal measure:an example from Turpan basin, North-western China 显示文摘 | Sun Yongge Sheng Guoying Peng Pingan | 2000 | Organic Geochemistry2000，31，12： | 1 |
| 17 | Peculiarities of salt lake sediments as potential source rocks in China 显示文摘 | FU JIAMO SHENG GUOYING PENG PINGAN BRASSELL S C EGLINTON G JIANG JIGANG | 1986 | Organic Geochemistry1986，10，： | 1 |
| 18 | Peculiarities of salt lake sediments as potential source rocks in China 显示文摘 | FU Jiamo SHENG Guoying PENG Pingan | 1986 | Organic Geochemistry1986，10，： | 1 |
| 19 | Study of genetic evolution of oil inclusion and density of surface oil by measurement of fluorescence lifetime of crude oil and oil inclusion显示文摘By using fluorescence lifetime image microscope(FLIM)and time-correlated single photon counting(TCSPC)technique,we measured fluorescence lifetime of crude oils with density of 0.9521-0.7606 g/cm^3 and multiple petroleum inclusions from Tazhong uplift of Tarim Basin.As indicated by the test results,crude oil density is closely correlated with average fluorescence lifetime following the regression equation Y=-0.0319X+0.9411,which can thus be used to calculate density of oil inclusions in relation to fluorescence lifetime and density of corresponding surface crude.For type A oil inclusions showing brown-yellow fluorescence from Tazhong 1 well in Tarim Basin,their average fluorescence lifetime was found to be 2.144-2.765ns,so the density of surface crude corresponding to crude trapping these oil inclusions is 0.852-0.873 g/cm^3,indicating that they are matured oil inclusions trapped at earlier stage of oil formation.For type B oil inclusions with light yellow-white fluorescence,their average fluorescence lifetime was found to be 4.029-4.919 ns,so the density of surface crude corresponding to crude trapping these oil inclusions is 0.784-0.812 g/cm^3,indicating that they are higher matured oil inclusions trapped at the second stage of oil formation.For type C oil inclusions showing light blue-green fluorescence,their average fluorescence lifetime was found to be 5.063-6.168 ns,so the density of surface crude corresponding to crude trapping these oil inclusions is 0.743-0.779g/cm^3,indicating that they are highly-matured light oil inclusions trapped at the third stage of oil formation. | LIU DeHan XIAO XianMing CHENG Peng SUN YongGe TIAN Hui PENG PingAn | 2017 | Science China Earth Sciences2017，60，1： | 1 |
| 20 | Peculiatities of salt lake sediments as potential source rocks in China显示文摘 | Fu Jiamo Sheng Guoying Peng Pingan | 1986 | Organic Geochemistry1986，10，： | 1 |
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