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Kinetics of petroleum generation determined from multiple cold trap pyrolysis gas chromatography

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chinese Science Bulletin 1997年第3期42卷 254-258页

作者： liu jinzhong and tang yongchun1. State Key laboratory of organic geochemistry, guangzhou institute of geochemistry, chinese academy of Science guangzhou 510640, china 2. Chevron Petroleum Technology Company, La Habra, CA 90633-0446, USA State Key laboratory of {1. geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou China Chevron Petroleum Technology Company La Habra USA

THOUGH commercial Pyrolysis-GC is widely used to evaluate petroleum source rocks, its chromatogram composed of all compounds generated in the whole pyrolysis process cannot provide generating rates or activation energy distributions of individual component or compound groups. To overcome the limitation, a new technique, multi cold trap pyrolysis gas chromatography (MCTP-GC), has been developed by Chevron Petroleum Technology Compa-

关键词： organic geochemistry pyrolysis kinetics.

Promising interlayer sensitization strategy for the construction of high-performance blue hyperfluorescence OLEDs

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Light(Science & Applications) 2024年第7期13卷 1372-1382页

作者： Jianghui Wang Peng Zou Letian Chen Zhentao Bai Hao liu Wen-Cheng Chen Yanping Huo Ben Zhong {1. Zujin Zhao State Key laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of TechnologyGuangzhou 510640China. School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China. School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhenGuangdong 518172China

Multi-resonance thermally activated delayed fluorescence(MR-TADF)materials are promising candidates for organic light-emitting diodes(OLEDs)with narrow electroluminescence(EL)*** researches focus on fabricating hyperfluorescence OLEDs to improve EL efficiencies of MR-TADF emitters by co-doping them with TADF sensitizers in a single host ***,in many cases,the polarity of the single host could be not suitable for both blue MRTADF emitters and blue TADF sensitizers,resulting in broadened EL spectra in high-polar hosts or decreased EL efficiencies in low-polar ***,we wish to report an efficient sensitization strategy for blue MR-TADF emitters by constructing an interlayer-sensitizing configuration,in which the blue TADF sensitizers and blue MR-TADF emitters are separated into two closely aligned host layers with high polarity and low polarity,*** on this strategy,efficient blue hyperfluorescence OLEDs are realized and verified by employing various TADF sensitizers and different MR-TADF emitters,furnishing outstanding external quantum efficiencies of up to 38.8%and narrow EL *** results validate the feasibility and universality of this interlayer sensitization strategy,which provides an effective alternative to high-performance blue hyperfluorescence OLEDs.

关键词： OLEDs interlayer sensitization

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塔里木盆地克拉2大气田天然气的成因探讨

天然气工业 2004年第11期24卷 8-10页

作者：李贤庆肖贤明米敬奎刘德汉申家贵唐永春肖中尧中国科学院广州地球化学研究所有机地球化学国家重点实验室美国加州理工学院石油能源与环境研究中心中国石油塔里木油田分公司勘探开发研究院

文章研究了塔里木盆地库车坳陷侏罗系煤系烃源岩在封闭体系下热模拟生成甲烷的碳同位素特征及其动力学参数,探讨了克拉2大气田天然气的成因。碳同位素动力学研究表明,库车坳陷侏罗系煤系烃源岩热模拟生成甲烷的碳同位素值介于-37‰^-25... 详细信息

文章研究了塔里木盆地库车坳陷侏罗系煤系烃源岩在封闭体系下热模拟生成甲烷的碳同位素特征及其动力学参数,探讨了克拉2大气田天然气的成因。碳同位素动力学研究表明,库车坳陷侏罗系煤系烃源岩热模拟生成甲烷的碳同位素值介于-37‰^-25‰之间;可以用动力学方法将煤系烃源岩热模拟实验数据外推,应用于地质条件。克拉2大气田天然气主要来源于中下侏罗统煤系烃源岩,属阶段捕获气,主要聚集了-5^-1.Ma阶段的天然气,其成熟度R(?)为1.3％-2.5％。这不仅得到早期相关研究成果的支持,而且也符合该区天然气的勘探实际。

关键词：煤系烃源岩大气田成因探讨碳同位素塔里木盆地侏罗系下侏罗统天然气库车坳陷热模拟实验

C-F insertion reaction sheds new light on the construction of fluorinated compounds

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chinese Chemical Letters 2024年第8期35卷 163-169页

作者： Dong-Sheng Deng Su-Qin tang Yong-Tu Yuan Ding-Xiong Xie Zhi-Yuan Zhu Yue-Mei Huang Yun-Lin {1. Henan Key laboratory of Function-Oriented Porous Materials and College of Chemistry and Chemical EngineeringLuoyang Normal UniversityLuoyang 471934China School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China Key laboratory of Organofluorine Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

The atom-economical C-F insertion chemistry is emerged as a promising technology for the synthesis of various fluorinated scaffolds,which have wide applications both in the academic and the industrial *** past three years have witnessed rapid developments in this *** highlight provides an overview on the evolution according to the fluorinating agents used.

关键词： C-F insertion Benzyl fluoride Acyl fluoride gem-Difluorocyclopropane Fluorinated scaffold

The generation and accumulation of natural gas from Yinan 2 gas pool in Kuqa Depression

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chinese Science Bulletin 2004年第S1期49卷 107-114页

作者： LI Xianqing XIAO Xianming tang {1. XIAO Zhongyao Ml Jingkui liu Dehan SHEN Jiagui liu jinzhong The State Key laboratory of {1. geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China Key laboratory of Coal Resources Ministry of EducationChina University of Mining and TechnologyBeijing 100083China The Research Center of Petroleum Energy and Environment California Engineer and Technology College21910 Currier RdWalnutCA 61769USA Research institute of Exploration and Development Tarim Oil Field Sub-CompanyPetroChinaKorla 841000China

By using the methods of hydrocarbon generation kinetics and carbon isotope kinetics, combined with geological background of natural gas pool formation, the generation and accumulation of natural gas from Yinan 2 gas pool was studied in Kuqa Depression of the Tarim Basin. Natural gas of Yinan 2 gas pool is mainly derived from Middle and Lower Jurassic coal-bearing source rocks, and generally belongs to long time-accumulated gas. It is suggested that Yinan 2 gas is chiefly accumulated in the last 5 Ma, its Ro ranges from 1.25% to 1.95%, and the loss rate of natural gas is about 25%-30%. This work not only complements and reduces the deficiency of formation model of natural gas pools which traditionally depends on the matching relationships between source rock, reservoir, cap rock, and trap, but also is a useful reference in the study of other gas pools.

关键词： natural gas formation hydrocarbon generation kinetics carbon isotope source rock Yinan 2 gas pool Kuqa Depression.

Kinetic Model of Gaseous Alkanes Formed from Coal in a Confined System and Its Application to Gas Filling History in Kuqa Depression,Tarim Basin,Northwest china

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Acta Geologica Sinica(English Edition) 2011年第4期85卷 911-922页

作者： liu Quanyou ZHANG Tongwei JIN Zhijun QIN Shengfei {1. yongchun liu Wenhui Exploration and Production Research institute SINOPECBeijing 100083China Bureau of Economic Geology The University of Texas at Austin University StationAustinTexas 78713- 8924USA Power Environmental and Energy Research InstituteCalifornia 91722USA Research institute of Petroleum Exploration and Development PetroChinaBeijing 100083China

Based on the pyrolysis products for the Jurassic low-mature coal under programmed temperature,and chemical and carbon isotopic compositions of natural gas from the Kuqa Depression, the genetic origin of natural gas was determined,and then a gas filling model was established,in combination with the geological background of the Kuqa *** active energy of CH_4,C_2H_6 and C_3H_8 was gotten after the data of pyrolysis gas products under different heating rates（2℃/h and 20℃/h）were fitted by the Gas Oil Ratio（GOR）Isotope Model *** the frequency factor（Af）was chosen as 1.1.^（1.）,the active energy of CH_4,C_2H_6 and C_3H_8 was 58 kcal/mol,57 kcal/mol and 54 kcal/ mol,*** distributive ranges of theδ^（1.）C_1.δ^（1.）C_2 andδ^（1.）C_3 values for the pyrolysis gas products are-35.9‰to-30.7‰,-26.2‰to-21.3‰and-26.4‰to-22.7‰,*** of the natural gases from the Kuqa Depression are dominated by hydrocarbon gases,with the high gas dryness（C_1.C_（1.4））at the middle and northern parts of the depression and the low values at both east and west sides and the southern *** carbon isotopes of methane and its homologs as a typical coal-type gas are enriched in ^（1.）C,and the distributive range of theδ^（1.）C_1.δ^（1.）C_2 andδ^（1.）C_3 value is-32‰to -38‰,-22‰to-24‰and-20‰to-22‰,respectively,with the carbon isotopes of gaseous alkanes being less negative with the carbon *** the ethane being enriched in ^（1.）C the increasing tendency of the geological reserve of natural gas in the Kuqa Depression is *** observed change is consistent with the results of pyrolysate gas yield of coal as a potential gas source in the Kuqa Depression,suggesting natural gas was thermally derived from the humic organic matters and the carbon isotopes of gaseous alkanes would coarsely predict the geological reserve of gas in the Kuqa *** the simulation of kinetic processes of gas generation for the Jurassic coal in the Kuqa Depression,the gas in th

关键词： natural gas gas kinetic carbon isotope gas-filling history Kuqa Depression

Recent advances in chemical protein synthesis:method developments and biological applications

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Science china Chemistry 2024年第4期67卷 1060-1096页

作者： Suwei Dong Ji-Shen Zheng Yiming Li Huan Wang Gong Chen Yongxiang Chen Gemin Fang Jun Guo Chunmao He Honggang Hu Xuechen Li Yanmei Li Zigang Li Man Pan Shan tang Changlin Tian Ping Wang Bian Wu Chuan{1. Wu Junfeng Zhao Lei {1. State Key laboratory of Natural and Biomimetic Drugs and School of Pharmaceutical SciencesPeking UniversityBeijing 100191China Division of Life sciences and Medicine University of Science and Technology of ChinaHefei 230027China School of Food and Biological Engineering Engineering Research Center of Bio-processMinistry of EducationHefei University of TechnologyHefei 230009China School of Chemistry and Chemical Engineering Nanjing UniversityNanjing 210023China State Key laboratory of Elemento-{1. Chemistry Nankai UniversityTianjin 300071China Department of Chemistry Tsinghua UniversityBeijing 100084China institute of Health {1. Anhui UniversityHefei 230601China College of Chemistry Central China Normal UniversityWuhan 430079China School of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou 510640China School of Medicine or institute of Translational Medicine Shanghai UniversityShanghai 200444China Department of Chemistry The University of Hong KongHong Kong 999077China Shenzhen Graduate School Peking UniversityShenzhen 518055China School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Life sciences University of Science and Technology of ChinaHefei 230026China Department of Chemical Biology Shanghai Jiao Tong UniversityShanghai 200240China institute of Microbiology Chinese Academy of SciencesBeijing 100101China Department of Chemistry Xiamen UniversityXiamen 361005China School of Pharmaceutical Science Guangzhou Medical UniversityGuangzhou 511436China

The central dogma of modern biology underscores the pivotal roles proteins play in diverse biological processes,the study of which necessitates advanced methods to produce proteins with precision and *** protein synthesis,a powerful approach utilizing chemical reactions for the de novo construction of structurally accurate proteins,has emerged as a transformative tool for studying proteins and generating protein derivatives/mimics inaccessible by natural biological machinery,including post-translationally modified proteins,proteins comprised of unnatural amino acids,as well as mirror-image *** review summarizes recent strides in synthetic method developments for chemical protein synthesis,including innovative techniques in solid-phase peptide synthesis,the challenges presented by difficult sequences in either synthesis or folding and the exploration of novel ligation reactions using both chemical and enzymatic ***,the review also delves into newly developed protocols for site-selective protein modifications and the generation of stapled or macrocyclized peptides/miniproteins,highlighting the power of chemical methods to make structurally diverse *** applications of synthetic proteins in investigating post-translational modifications(phosphorylation,lipidation,glycosylation,ubiquitination,etc.),mirror-image biological processes and drug development are further ***,these topics provide a comprehensive overview of the current landscape of chemical protein synthesis.

关键词： chemical protein synthesis solid-phase peptide synthesis ligation reactions post-translational modifications mirror-image proteins peptide drugs

Oil cracking to gases: Kinetic modeling and geological significance

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chinese Science Bulletin 2006年第22期51卷 2763-2770页

作者： TIAN Hui 1.2 WANG Zhaoming XIAO Zhongyao LI Xianqing XIAO Xianming State Key laboratory of {1. geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Graduate School of the chinese academy of sciences Beijing 100049China Tarim Oil Field Company Korla 841000 China Key laboratory of Coal Resources Ministry of Education ChinaUniversity of Mining and Technology Beijing 100083 China

从 Tarim 盆的 LN1. 的一件三叠纪的油样品是用在在 50 MPa 的恒压下面的 200-620 deg C 的封上的金试管的 pyrolyzed。气体并且剩余可溶的烃被分析。结果证明到气体的石油的裂化能被划分成二个不同阶段：从液体油的全部的 C1.5 气体的... 详细信息

从 Tarim 盆的 LN1. 的一件三叠纪的油样品是用在在 50 MPa 的恒压下面的 200-620 deg C 的封上的金试管的 pyrolyzed。气体并且剩余可溶的烃被分析。结果证明到气体的石油的裂化能被划分成二个不同阶段：从液体油的全部的 C1.5 气体的主要产生由 C2-5 烃和 secondary 或到甲烷的 C2-5 气体的进一步的裂开的优势描绘了导致气体的进步的干的 andcarbon 富有的事。基于试验性的数据，运动参数为主要产生和第二等的石油的裂化裂化气被决定并且外推到地质的条件预言热稳定性和原油的裂开的程度。最后，为原油的热破坏的一个进化模型被建议，它到油裂化气的迁居和累积的含意被讨论。

关键词：石油裂化动态建模石油热稳定性气体积累

婴儿肠道不同部位T细胞亚群及其表面分子检测--婴儿肠道HIV-感染和复制的可能性分析

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现代免疫学 2008年第6期28卷 496-501页

作者：黄秀艳曾耀英刘钧澄唐先高陈洁张志崇佘锦标王辉暨南大学组织移植与免疫中心广州510632 中山大学附属第一医院小儿外科广州510080 暨南大学附属第一医院器官移植中心广州510632 深圳市东湖医院肝病研究所深圳518020

通过对婴儿外周血(PB)、肠系膜淋巴结(MLN)和肠上皮内(IE)来源淋巴细胞的比较性研究,以分析婴儿肠道HIV-1.染容许性和HIV-1.制支持性的细胞与分子基础。分离婴儿外周血单个核细胞(PBMC),肠系膜淋巴结淋巴细胞(MLNL)和肠上皮间淋巴细胞... 详细信息

通过对婴儿外周血(PB)、肠系膜淋巴结(MLN)和肠上皮内(IE)来源淋巴细胞的比较性研究,以分析婴儿肠道HIV-1.染容许性和HIV-1.制支持性的细胞与分子基础。分离婴儿外周血单个核细胞(PBMC),肠系膜淋巴结淋巴细胞(MLNL)和肠上皮间淋巴细胞(iIEL),制备单细胞悬液,运用流式细胞术结合荧光抗体染色技术:(1.检测不同部位的CD3+T细胞中CD4+辅助性T细胞和CD8+杀伤性T细胞比例;(2)检测不同部位的CD4+T细胞CCR5和CXCR4以及CD69和HLA-DR的表达水平。结果发现:(1.iIEL中的CD4+辅助性T细胞占CD3+T细胞的比例明显低于PBMC和MLNL,而CD8+杀伤性T细胞占CD3+T细胞的比例明显高于PBMC和MLNL;(2)iIEL中CD4+T细胞CCR5和CXCR4以及CD69和HLA-DR的表达水平均明显高于PBMC和MLNL。结果表明:婴儿iIEL中CD4+T淋巴细胞与PBMC和MLNL的CD4+T淋巴细胞相比较,高表达HIV-1.胞共受体CCR5和CXCR4,提示iIEL更易被HIV-1.染;iIEL中CD4+T淋巴细胞高表达细胞活化标记分子CD69和HLA-DR,说明其更有利于HIV-1.制,这种高基础活化率可能与其不断接触小肠来源的食物和共生菌抗原有关。由此可见,婴儿肠道具有了HIV-1.染容许性和HIV-1.制支持性的细胞和分子基础,因此成了HIV-1.易感的解剖部位,这可能是围产期HIV感染的婴儿病毒载量明显高于成年人,且病情进展也比成年人快的原因。

关键词： HIV病 CD4+T细胞肠上皮间淋巴细胞免疫过度活化