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Facile synthesis of phthalan derivatives via a Pd-catalyzed tandem hydroalkynylation,isomerization,Diels-Alder cycloaddition and aromatization reaction

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Chinese Chemical Letters 2015年第1期26卷 73-76页

作者： ru-Wei shen Jian-Jun Yang Li-Xiong Zhang State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemistry and Chemical EngineeringNanjing Tech University

A novel Pd-catalyzed tandem reaction involving hydroallojnylation, isomerization, Diels-Alder cycloaddition and aromatization reaction to produce phthalan derivatives in moderate yields is reported. The reaction is at... 详细信息

关键词： Tandem reaction Palladium catalysis Alkyne Phthalan Diels-Alder cycloaddition

Effect of Iodine Additive on Thermostability of Bulk Amorphous Sulfur Prepared by Rapid Compression

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Chinese Physics Letters 2011年第8期28卷 206-208页

作者： LIN sheng-Xiong LIU Xiu-ru SHAO Chun-Guang shen ru HONG Shi-Ming Laboratory of High Pressure Physics Southwest Jiaotong UniversityChengdu 610031 National Engineering Research Center for Advanced Polymer Processing Technology Zhengzhou UniversityZhengzhou 450002 Analysis and Test Center Southwest Jiaotong UniversityChengdu 610031

Bulk amorphous sulfur(a-S)with 1 mol%of phosphorus,selenium and iodine additives and bulk amorphous pure sulfur samples were prepared by rapidly compressing the melts to 2 GPa within 20 *** results of x-ray diffraction,differential scanning calorimetry and in situ wide angle x-ray scattering of the recovered samples are presented and *** the iodine doping case,obvious inhibiting effects on the crystallization and the melting process under high temperatures occurred,as well as on the structure relaxation of a-S at room temperature,suggesting that the thermal stability of amorphous sulfur is remarkably improved by the introduction of iodine additives.

关键词： amorphous iodine Bulk

A Novel Efficient Method for Synthesis of β-Organoseleno Substituted Allyl Sulfoxides

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Chinese Chemical Letters 2005年第10期16卷 1333-1334页

作者： Zhi Meng WU ru Wei shen Lu Ling WU Xian HUANG Department of Chemistry Zhejiang University （Xixi Campus） Hangzhou 310028

Hydroselenation of 1, 2-allenyl sulfoxides give 2-organoseleno substituted allyl sulfoxides in high yields and the reaction is absolute regioselective.

关键词： Hydroselenation allenyl sulfoxides regioselectivity.

Analysis of volatile components in a Chinese fish sauce,Fuzhou Yulu, by gas chromatography-mass spectrometry

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2008年第12期9卷 977-981页

作者： Yuan-fan YANG shen-ru CHEN Hui NI Xing-qian YE School of Biosystem Engineering and FoodScience Zhejiang University Hangzhou 310029 China School of Bioengineering Jimei University Xiamen 361021 China

Volatile components of Fuzhou Yulu, a Chinese fish sauce, were analyzed by gas chromatography-mass spectrometry （GC-MS）, and two pretreatment methods, i.e., purge and trap （P＆T） GC-MS and ethyl acetate extraction followed by GC-MS, were compared. P＆T-GC-MS method determined 12 components, including sulfur-containing constituents （such as dimethyl disulfide）, nitrogen-containing constituents （such as pyrazine derivatives）, aldehydes and ketones. Ethyl acetate extraction fol- lowed by GC-MS method detected 10 components, which were mainly volatile organic acids （such as benzenepropanoic acid） and esters. Neither of the two methods detected alcohols or trimethylamine. This study offers an important reference to determine volatile flavor components of traditional fish sauce through modem analysis methods.

关键词： Fish sauce Fuzhou Yulu Volatile component Purge and trap Gas chromatography-mass spectrometry (GC-MS)

The HBV E Genotype Discover in Dai Nationality in Xishuangbanna, Yunnan Province

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Virologica Sinica 2009年第1期24卷 77-79页

作者： Hai-ping ZHAO Yuan-ying shen ru shen Yuan-yi WANG Mei-ya FU School of Public Health Dali University Dali 671000 China

To investigate the distribution of Hepatitis B virus (HBV) genotypes among the population of Dai nationality in Xishuangbanna, Yunnan Province HBV genotypes of the Serum samples were tested by PCR-RFLP. This is the first time to discover the B+E genotypes in China. This finding provides new information for understanding the distribution of HBV genotype in China and a provides a basis for establishing a Chinese gene bank.

关键词： Hepatitis B virus (HBV) Genotype Subgenotype Dai nationality

Pd-catalyzed sequential reaction for the synthesis of fused tricyclic compounds containing a dihydrofuran or isobenzofuranone unit

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Chinese Chemical Letters 2009年第2期20卷 165-167页

作者： ru Wei shen Shu Gao Zhu Qin Qin Xia Lu Ling Wu Xian Huang Department of Chemistry Zhejiang University (Campus Xixi) Hangzhou 310028 China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

A novel Pd-catalyzed sequential reaction for the synthesis of fused tricyclic compounds with a dihydrofuran or isobenzofuranone unit was developed.

关键词： Pd-catalyzed Sequential reaction Dihydrofuran Isobenzofuranone

Phase Analysis of Titanium in Steel and Some Aspects on Their Application

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Journal of Iron and Steel Research International 1994年第1期1卷 51-55页

作者： CHEN Ming Hao and shen ru Mei Central Iron & Steel Research Institute MMI

Phase analysis of titanium in steel has been carried out on thirty samples with different Ticontent from 0. 036 %-0. 204% . The various heat treatments for the samples are to anneal at 1050-1200 ℃ for a while ,followed by cooling at a rate of 1 . 10, 20 ℃/s ,*** is achieved to separate and determine fine particle TiC ,coarse particle Ti_2CS and TiN ex-tracted from steel by controlling the oxidation potential and acidity of *** results of quantrtative analysis of the individual phase show that 0. 09 %- 0. 13 % Ti-contentis enough to eliminate free nitrogen and transform MnS into Yi_2CS in steel effectively. In the case of0. 06 %- 0. 10 % Ti-content combined with annealing at 1050℃. and quick cooling at 20 ℃/s ,a prop-er amount of fine particle TiC can be precipitated and the rate of TiC (fine )/TiC (total )is high ,which arebeneficial to increase strength and toughness of steel. More Ti-content or cooling slowly will preciprtatemore coarse particle TiC which decreaces toughness severely. The proposed methods for quantitativephase analysis of titanium in steel are given in detail.

关键词： hase analysis oxidation potential.precipitation strengthening

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Amplified Electrochemical Immunoassay Using HRP Labeled Protein as an Inhibitor to Silver Deposition in the Presence of H_2O_2

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Chinese Chemical Letters 2006年第4期17卷 489-492页

作者： Zhao Peng CHEN Jian Hui JIANG Xiao Bing ZHANG Guo Li shen ru Qin YU State Key Laboratory for Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082

A novel electrochemical immunosensor with amplification effect based on the enzyme inhibition of silver deposition was proposed. In this method, the capture antibody was first immobilized onto a gold electrode via a self-assembled layer. After a sandwich immunoreaction, HRP labeled antibody was bound to the gold electrode. The HRP on the electrode inhibited silver deposition when the electrode was incubated in hydroquinone-H2O2 solution and silver ion solution. The linear sweep voltammetry was chosen to detect the deposited silver and the result showed that the peak current was linearly proportional to the content of IgG in the range of 50 to 2500 ng/mL with a detection limit of 35 ng/mL.

关键词： Immunosensor linear sweep voltammetry silver deposition.

Research on Hepatitis B virus Genotypes and Subgenotypes among Bai Nationality in Dali, Yunnan Province

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Virologica Sinica 2008年第1期23卷 57-62页

作者： Wei LI Yuan-ying shen Xuan-rong ZHANG Lai-feng REN Qiang LI ru shen Hai-ping ZHAO Department of Microbiology ＆ Immunology Dali University Dali 671000 China Department of Microbiology ＆ Immunology Fenyang College of Shanxi Medical University Fenyang 032200 China

To investigate the distribution of hepatitis B virus (HBV) genotypes and subgenotypes among the Bai nationality in Dali, a total of 100 serum samples from patients with chronic HBV-infection were collected for the detection of HBV genotypes and subgenotypes by genotype-specific primers and restriction fragment length polymorphism (RLFP), respectively. Among the 100 samples, the proportions of genotype B, C and mixed genotype (B+C) were 41%, 25% and 34%, respectively. All the genotype B strains belonged to subgenotype Ba. In genotype C, 84% were Subgenotype Cs and 12% were subgenotype Ce. The distribution of genotypes B, C and B+C showed no significant difference between male and female patients (P=0.182) and among the age groups of patients (P=0.812). The rates of HBeAg/HBeAg positivity were no significantly different among genotypes B, genotype C and mixed genotype (B+C) (P=0.077/P=0.663). In Dali, genotypes B, B+C and C existed among Bai nationality with chronic HBV-infection, and genotype B was the major genotype. Subgenotypes Ba and Cs were the predominant strains in patients with HBV genotype B/C infection. The most prominent characteristic was the higher prevalent rate of mixed genotype (B+C) in patients.

关键词： Hepatitis B virus Genotype Subgenotype Polymerase chain reaction Restriction fragment lengthpolymorphism (RLFP), Bai nationality in China