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Long-chain alkanes in the atmosphere:A review

Journal of Environmental Sciences 2022年第4期34卷 37-52页

作者： Junling Li Kun Li Hong Li Xuezhong Wang Weigang Wang Ke Wang Maofa Ge State Key laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China laboratory of Atmospheric Chemistry Paul Scherrer InstituteVilligen 5232Switzerland State Key laboratory for Structural Chemistry of Unstable and Stable Species Beijing National Laboratory for Molecular SciencesCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China

As a representative species of intermediate volatile organic compounds(IVOCs),long-chain alkanes are considered to be important precursors of secondary organic aerosols(SOA)in the *** work reviews the previous studies on long-chain alkanes in the atmosphere:(1)the detection methods and filed observations of long-chain alkanes in both gas and particle phases are summarized briefly;(2)the laboratory studies of long chain alkanes are reviewed,the kinetic data,reaction mechanism,SOA yields,and physicochemical properties of SOA are included in detail;(3)the research progress related to model simulations of long-chain alkanes are also *** addition,based on available research results,several perspective contents are proposed that can be used as a guideline for future research plans.

关键词： Long-chain alkanes Detection methods Field observation laboratory study Model simulation

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Development of the Novel Grid Type Multi-stage Regeneration Technology for FCC Unit

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China Petroleum Processing & Petrochemical Technology 2006年第1期8卷 43-47页

作者： Zhang Zhenqian Tian Geng (SINOPEC Luoyang Petrochemical Engineering Company, Luoyang 471003) SINOPEC Luoyang Petrochemical Engineering Company Luoyang 471003 China

Based on the results of cold model tests, LPEC has developed a technology for regeneration of FCC catalyst in a regenerator with novel grid type internals in order to intensify the contact between gas and solid and enhance the coke burning efficiency in the regenerator. Test results have revealed that the density change in the fluidized bed equipped with grid internals is relatively homogeneous and the bubbling fre- quency is obviously reduced with apparent improvements in the dead fluidized zone adjacent to the regen- erator wall, and this device can be applied to the intensified regeneration of catalyst in the FCC regenerator. The commercial application of this device in a 0.8 Mt/a RFCCU at the refinery A had indicated that the carbon content of regenerated catalyst was reduced to 0.03% from 0.18%, and the amount of coke burned was increased by 5% with a definite reduction in main air consumption of the regenerator and some density reduction in the dilute phase section of the regenerator.

关键词： internals regeneration technology catalyst laboratory study commercial application catalytic cracking

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LURR'S twenty years and its perspective

LURR'S twenty years and its perspective

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作者： Yin Xiangchu~(*,**1)) Zhang Langping~(**) Zhang Huihui~(**) Yin Can~(***) Wang Yucang~(***,2)) Zhang Yongxian~(**,+) Peng Keyin~(**,+) Wang Haitao~(**,++) Song Zhiping~(**,+++) *(Institute of Earthquake Science,China Earthquake Administration(CEA),Beijing 100036,China) **(LNM(State Key laboratory of Nonlinear Mechanics),Institute of Mechanics,Chinese Academy Sciences(CAS),Beijing 100080,China) ***(ESSCC,University of Queensland,Australia,The University of Queensland,St.Lucia,Brisbane, QLD 4072,Australia) +(China Earthquake Network Center,CEA,Beijing 100036,China) ++(Xinjiang Earthquake Bureau,CEA,Urumchi 830011,China) +++(Shanghai Earthquake Bureau,CEA,Shanghai 200062,China)

根据1956年制订的"十二年科学发展纲要",中科院力学所和清华大学合作创办了工程力学研究班,于1957年初开始招生。我由清华大学选拔推荐进了工程力学研究班。授课的都是当代顶级的力学家如钱学森、郭永怀、钱伟长、李敏华、郑哲敏、杜庆... 详细信息

根据1956年制订的"十二年科学发展纲要",中科院力学所和清华大学合作创办了工程力学研究班,于1957年初开始招生。我由清华大学选拔推荐进了工程力学研究班。授课的都是当代顶级的力学家如钱学森、郭永怀、钱伟长、李敏华、郑哲敏、杜庆华老师等。李敏华老师教我们"塑性力学"。关于加卸载的概念,

关键词： Load-Unload Response Ratio(LURR) earthquake prediction numerical simulation laboratory study

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laboratory research of the first confirmed pregnant woman case of avian influenza A (H5N1) by etiology in China

Laboratory research of the first confirmed pregnant woman ca...

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华东六省一市生物化学与分子生物学学会2006年学术交流会

作者： LIU yan,LI qun,HU wan-fu,MA ming-ying,LIU li-ping,HE jun,HU shou-kui,REN jun (Ankui Provincial Center for Disease Control and Prevention,Hefei 230061,China)

Objective To ascertain causation of a pregnant woman with undefined pneumonia reported from the People’s Hospital of Tongling city in Anhui province on November 2005. Methods The patient’s tracheal aspirates and serum being collected were tested by both RT-PCR and real-time PCR to detect viral nucleic acids of A/H5Nl,A/H7N7,A/H9N1,and were inoculated into special pathogen free(SPF) and were sequenced and analyzed. Results HA gene of A/H5N1 virus were positive in tracheal aspirates. The results of hemagglutinin(HA) gene of A/AnHui/1/2005 sequencing showed that the receptor specificity and the connecting peptide between HA1 and HA2 were still avian influenza origin. Conclusion The undefined pneumonia case was confirmed as the first human case of avian influenza (H5N1) virus infection by etiology in the mainland of china.

关键词： Avian influenza H5N1 subtype laboratory study

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