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SYNTHESIS AND STRUCTURE OF A NOVEL“BUTTERFLY”CLUSTER“MoOS_3Cu_2(Py)_2(PPh_3)_2”

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Chinese Chemical Letters 1995年第1期6卷 91-92页

作者： Hou, HW Xin, HQ Huang, XX cai, jh Kang, BS Nanjing Univ Dept Chem State Key Lab Coordinat Chem Nanjing 210093 Peoples R China Chinese Acad Sci Fujian Inst Res Struct Matter State Key Lab Struct Chem Fuzhou 350002 Peoples R China

Reactions or [NH1]2MoO2S2, CuI and PPh3 in Py produced mixed-metal cluster [MoOS3Cu2(Py)2(PPh3)2], which crystallizes in the monoclinic, space group P21 / a with a= 18. 149(4), b = 10.044(3), c = 25. 171(7)A, β = 107.45(2)°,V = 4377(2)A3,Z= 4, Dx. = 1.54, R = 0.040, Rw= 0.049. The results of structure determination show that the central unit of the cluster compound is composed of three metal and three sulfur atoms.

关键词：魫蜢

Ultrasonically activated scalpel versus monopolar electrocautery shovel in laparoscopic total mesorectal excision for rectal cancer

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World Journal of Gastroenterology 2008年第25期14卷 4065-4069页

作者： Bao-Jun Zhou, Wei-Qing Song, Qing-Hui Yan, Jian-Hui cai, Feng-An Wang, Jin Liu, Guo-Jian Zhang, Guo-Qiang Duan, Zhan-Xue Zhang, Department of Gastrointestinal Surgery, The Second Hospital of Hebei Medical University, Shijiazhuang 050000, Hebei Province, China Author contributions: Zhou BJ, Song WQ, Yan QH, cai jh, Wang FA, Liu J, Zhang GJ, Duan GQ and Zhang ZX contributed equally to this work Zhou BJ, Song WQ, Yan QH, cai jh and Wang FA designed the research Zhou BJ, Liu J and Zhang GJ performed the research Duan GQ and Zhang ZX analyzed the data and Zhou BJ, Song WQ and Yan QH wrote the paper. Department of Gastrointestinal Surgery The Second Hospital of Hebei Medical University Shijiazhuang 050000 Hebei Province China. zhoubaojun67@***

AIM： To investigate the feasibility and safety of monopolar electrocautery shovel （ES） in laparoscopic total mesorectal excision （TME） with anal sphincter preservation for rectal cancer in order to reduce the cost of the laparoscopic operation, and to compare ES with the ultrasonically activated scalpel （US）. METHODS： Forty patients with rectal cancer, who underwent laparoscopic TME with anal sphincter preservation from June 2005 to June 2007, were randomly divided into ultrasonic scalpel group and monopolar ES group, prospectively. White blood cells （WBC） were measured before and after operation, operative time, blood loss, pelvic volume of drainage, time of anal exhaust, visual analogue scales （VAS） and surgery-related complications were recorded. RESULTS： All the operations were successful; no one was converted to open procedure. No significant differences were observed in terms of preoperative and postoperative d I and d 3 WBC counts （P = 0.493, P = 0.375, P = 0.559）, operation time （P = 0.235）, blood loss （P = 0.296）, anal exhaust time （P = 0.431）, pelvic drainage volume and VAS in postoperative d 1 （P = 0.431, P = 0.426） and d 3 （P = 0.844, P = 0.617） between ES group and US group. The occurrence of surgery-related complications such as anastomotic leakage and wound infection was the same in the two groups.CONCLUSION： ES is a safe and feasible tool as same as US used in laparoscopic TME with anal sphincter preservation for rectal cancer on the basis of the skillful laparoscopic technique and the complete understanding of laparoscopic pelvic anatomy. Application of ES can not only reduce the operation costs but also benefit the popularization of laparoscopic operation for rectal cancer patients.

关键词： Laparoscopy Ultrasonically activatedscalpel Monopolar electrocautery Rectal cancer Totalmesorectal excision

Perovskite LiBaH3 for photo-assisted dinitrogen fixation

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Science China Chemistry 2025年第03期 1169-1174页

作者： Kaixun Cui Yeqin Guan Yongli cai Runze Wang Qianru Wang Wenbo Gao Jianping Guo Ping Chen Department of Chemical Physics University of Science and Technology of China Dalian Institute of Chemical Physics Chinese Academy of Sciences Center of Materials and Optoelectronics Engineering University of Chinese Academy of Sciences

Establishing supply chains for future ammonia energy systems requires the development of efficient materials and processes for ammonia production under mild *** researches disclose unique functionalities of binary alkali and alkaline earth metal hydrides in mediating ammonia *** to the rich compositional and structural properties of the metalhydrogen system,we herein report that LiBaH3,as a narrow band gap perovskite hydride,exhibits a strong response to visible light ***,hydridic hydrogen undergoes reductive elimination of producing H2and creates an electron-rich *** an environment favors dinitrogen fixation to form N–H *** on this chemical property,a chemical looping ammonia synthesis process mediated by LiBaH3and driven by both photo and thermal energies was proposed and *** work demonstrates that hydride perovskites are promising candidates for mediating photo-assisted nitrogen fixation reactions.

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A Novel Condensation Reaction of Alkyl Aryl Ketone with Ethyl Ortho-Formate under Microwave Irradiation

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Chinese Chemical Letters 1998年第1期9卷 1-4页

作者： Yu, jh Hu, YL Yang, SY Yin, YQ cai, LP Chinese Acad Sci Lanzhou Inst Chem Phys State Key Lab Oxo Synthesis & Select Oxidat Lanzhou 730000 Peoples R China Lanzhou Univ Natl Lab Appl Organ Chem Lanzhou 730000 Peoples R China

Under microwave irradiation, boron trifluoride has been found to mediate a novel condensation reaction of alkyl aryl ketone with ethyl ortho-formate to give a series of new condensation products (5,6,7,8). Their structures were determined by IR, H-1/C-13-NMR, MS spectra, and the crystal structure of 8 was further defined by X-ray diffraction.

关键词： microwave irradiation condensation alkyl aryl ketone

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腹腔镜在直肠癌手术治疗中的临床应用

世界华人消化杂志 2006年第8期14卷 827-829页

作者：周保军闫庆辉宋伟庆蔡建辉刘津张国建段国强任鹏涛河北医科大学第二医院胃肠外科河北省石家庄市050000

目的:探讨腹腔镜手术治疗直肠癌的方法和可行性．方法:2005-02／12共开展腹腔镜直肠癌手术31 例,其中Dixon手术20例,Miles手术9例,乙状结肠袢式造口术2例．结果:手术均获成功,无中转开腹,手术时间平均200 min,术中平均出血量80 mL,术后... 详细信息

目的:探讨腹腔镜手术治疗直肠癌的方法和可行性．方法:2005-02／12共开展腹腔镜直肠癌手术31 例,其中Dixon手术20例,Miles手术9例,乙状结肠袢式造口术2例．结果:手术均获成功,无中转开腹,手术时间平均200 min,术中平均出血量80 mL,术后肠功能恢复时间平均30 h,术后1例Dixon手术患者出现吻合口瘘,经保守治疗痊愈．结论:腹腔镜直肠癌手术具有创伤小、手术出血少、术后痛苦小、肠道功能恢复快等特点,是可行的、安全有效的手术方法．

关键词：腹腔镜直肠肿瘤根治术外科学

生物降解地膜农田填埋过程中膜表面细菌群落演替过程

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环境科学 2025年第2期46卷 1236-1244页

作者：于皓张明阳金德才辽宁工程技术大学环境科学与工程学院阜新123000 中国科学院生态环境研究中心北京100085

随着农业现代化的快速发展,生物降解地膜在农田中的使用越来越广泛.然而,关于生物降解地膜对土壤细菌群落的影响仍知之甚少.研究选用生物降解地膜(PBAT+PLA)在农田中进行了为期75 d的填埋实验,采用Illumina NovaSeq高通量测序技术,对不... 详细信息

随着农业现代化的快速发展,生物降解地膜在农田中的使用越来越广泛.然而,关于生物降解地膜对土壤细菌群落的影响仍知之甚少.研究选用生物降解地膜(PBAT+PLA)在农田中进行了为期75 d的填埋实验,采用Illumina NovaSeq高通量测序技术,对不同填埋时期的生物降解地膜表面的细菌群落进行分析.结果表明,生物降解地膜(H8)表面的细菌α多样性显著小于对照土壤(CK).此外,与填埋初期相比,填埋中后期H8处理中细菌α多样性显著下降(P<0.05).CK和H8处理中细菌群落结构显著不同(P<0.01).H8处理中的变形菌门(Proteobacteria)相对丰度显著大于CK处理(P<0.05).LEfSe分析发现,和CK处理相比,在填埋初期H8处理中差异显著的类群为假节杆菌属(Pseudarthrobacter)和食酸菌属(Acidovorax),填埋中期差异显著的类群为贪噬菌属(Variovorax)和分支杆菌属(Mycobacterium),填埋后期差异显著的类群为噬氢菌属(Hydrogenophaga)和黄色金线菌属(Chryseolinea),以上类群可以被看做是该阶段的指示物种.基于FAPROTAX对细菌群落功能进行分析发现,在填埋处理的初期和中期,H8处理中细菌群落与碳代谢相关的功能得到了增强.网络分析发现,与CK处理相比,H8处理中的细菌群落拥有较简单的网络结构和较高的模块化值以及更多的负相关连接数.研究结果可为深入了解生物降解地膜对土壤微生态环境影响提供科学依据.

关键词：生物降解地膜(BDM) 细菌群落多样性群落组成群落功能网络分析

HIGH ACCURACY FOR MIXES FINITE ELEMENT METHODS IN RAVIART-THOMAS ELEMENT

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Journal of Computational Mathematics 1996年第2期14卷 175-182页

作者： Lin, Q Pan, jh CHINESE ACAD SCI INST SYST SCIBEIJINGPEOPLES R CHINA UNIV PETR DEPT BASIC SCIBEIJINGPEOPLES R CHINA

This paper deals with Raviart-Thomas element (Q(2,1) x Q(1,2) - Q(1) element). Apart from its global superconvergence property of fourth order, we prove that a postprocessed extrapolation can globally increased the ac... 详细信息

关键词： Math Wang HIGH ACCURACY FOR MIXES FINITE ELEMENT METHODS IN RAVIART-THOMAS ELEMENT

A Linear Programming Model for Seabed Oil-Gas Pipe Network

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China Ocean Engineering 1998年第4期13卷 477-482页

作者： Li, HW Tan, jh Shanghai Jiao Tong Univ Sch Naval Architecture & Ocean Engn Shanghai 200030 Peoples R China

This paper analyzes the pipe network system of oil-gas collection and transportation for offshore oilfield development. A '0-1' integer linear programming model is constructed to optimize the investment of seabed pipe network. The mathematical model is solved by the spanning tree method of graph theory and network analysis. All spanning trees of a network graph compose all the feasible solutions of the mathematical model. The optimal solution of the model is the spanning tree with the minimum cost among all spanning trees. This method can be used to optimize the seabed pipe network system and give a minimum cost plan for the development of offshore marginal oilfield groups.

关键词： seabed pipe network offshore oilfield linear programming network analysis

The silt stalactite——a peculiar kind of sedimentary structures

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Chinese Science Bulletin 1997年第23期42卷 1974-1977,2025页

作者： Zhong, jh Ma, ZP Univ Petr China Dongying 257062 Peoples R China

THE Yellow River, with its huge amount of silt charge from the Loess Plateau, is the secondlargest river in China. Its lower reach has become a famous hanging river because of serioussilting up, and the magnitude of discharge changes much from season to season. As a result ofsilting, migration of the stream channel happens frequently. Lateral erosion of channel or pointbars, and scarp slopes forming during the erosion may be often observed. The silt stalactite,hitherto not reported, usually forms on surfaces of the slope. As a newly found kind of sedirnen-tary structure, the silt stalactite may have some significance to the study of sedimentary envi-ronments and paleoclimate.

关键词： silt stalactite sedimentary structure the Yellow River Delta.