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Studies on Chemical Constituents of Belamcanda Chinensis(L.)DC.(Ⅱ)

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Chinese Chemical Letters 1997年第2期8卷 133-134页

作者： Li Xin ZHOU and Mao LIN(Institute of Materia Medica,Chinese Academy of medical Sciences,peking union medical college.beijing, 100050) Institute of Materia Medica Chinese Academy of Medical Sciences Peking Union Medical College Beijing 100050 China

Nine compounds were isolated from the acetone soluble fraction of ethanolic extract of the roots of Belamcanda chinensis (L.)DC. The structure of new compound I,named shegansu A,has been established as irigenin-5-O-(6'-O-vanillin acid)-β-D-glucoside(Ⅰ) by the use of spectroscopic evidence (UV, IR. FAB-MS.1HNMR, 13CNMR,1H-13CNMR and NOE difference spectrum) and chemical *** well known compounds were identified as isorhapotigenin (Ⅲ),resveratrol(Ⅳ), P-hydroxy benzoic acid (Ⅴ), iridin (Ⅵ), tectoridin (Ⅶ),tectorigenin(Ⅷ) and daucosterol(Ⅸ). Ⅲ-Ⅸ were isolated from the plant for the first time.

关键词： DC OCH

Adult congenital diaphragmatic hernia of the liver: a rare case report

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Science china(Life Sciences) 2010年第2期53卷 204-206页

作者： LIU LiGuo1,2,XU YiYao1,MAO YiLei1,SANG XinTing1,YANG ZhiYing1,LU Xin1,ZHONG ShouXian1 & HUANG JieFu1 1 department of Liver Surgery,peking union medical college hospital,beijing 100730,china 2.department of Abdominal Surgery,Cancer Institute and hospital,Chinese Academy of medical Science and peking union medical college,beijing 100021,china. 1. department of Liver Surgery Peking Union Medical College Hospital Beijing 100730 China2. Department of Abdominal Surgery Cancer Institute and Hospital Chinese Academy of Medical Science and Peking Union Medical College Beijing 100021 China

Congenital diaphragmatic hernia (CDH), which mainly occurs in the newborn or in childhood with severe respiratory distress and high mortality, is rarely found in adult, especially for those uncommon right CDH [1–4]. ... 详细信息

关键词： case In Adult congenital diaphragmatic hernia of the liver a rare case report

Cloning and Characterization of a Novel Gene SRG-L Expressed in Late Stages of Mouse Spermatogenic Cells

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Acta Biochimica et Biophysica Sinica 2004年第5期36卷 315-322页

作者： Rui GUO, Peng-Peng MA, Jing MA, Ye-Hua GE, She-Pu XUE, and Dai-Shu HAN*department of Cell Biology, Institute of Basic medical Sciences, Chinese Academy of medical Sciences & peking union medical college,beijing 100005, china department of Cell Biology Institute of Basic Medical Sciences Chinese Academy of Medical Sciences & Peking Union Medical College

A cDNA expressed specifically in late stages of mouse spermatogenic cells during spermato- genesis was cloned by using overlapping RT-PCR and RACE. The cDNA contained an open reading frame (ORF) of 2625 base pairs that encoded an 874 amino acids protein. Comparison analysis of amino acid sequence showed 91% and 80% identity to a rat homologue XP-226242 and a monkey homologue BAB63115 respectively. The expression of the mRNA was only observed in pachytene spermatocytes, round, and elongating spermatids. We named this gene as SRG-L (spermatogenesis related gene expressed in the late stages of spermatogenic cells, GenBank accession No. AY352586). The tissue-specific analysis showed that the SRG-L was highly expressed in spleen and testis. The results suggested that SRG-L might play special roles during spermatogenesis, particularly related to meiosis and spermiogenesis. Analysis of the amino acid sequence showed there was a coiled-coil region near the N-terminal region and rich phosphorylation sites, suggesting SRG-L might function as a transmembrane protein mediating signal transduction. This study also demonstrated that gene cloning by RT-PCR was applicable and convenient when its homologous gene was known.

关键词： spermatogenesis RT-PCR RACE gene cloning

An Intelligent Otologic Drill

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Journal of Otology 2010年第2期5卷 104-110页

作者： SHEN Peng1,FENG Guo-dong2,CAO Tian-yang 3,GAO Zhi-qiang 2,LI Xi-sheng 3 1 department of Otolaryngology,Chuiyangliu hospital of beijing 2.department of Otolaryngology,peking union medical college hospital,Chinese Academy of medical Sciences and peking union medical college,beijing,china 3 School of Information & Engineering,University of Science and Technology beijing,beijing,china department of Otolaryngology Chuiyangliu Hospital of Beijing department of Otolaryngology Peking Union Medical College Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing China School of Information & Engineering University of Science and Technology Beijing Beijing China

Objective To test a modified otologic drill under different drilling conditions for its ability to identify drilling faults and stop *** Based on force analysis and previous works,an otologic drill was modified and equipped with three *** various conditions,the drill was used to simulate three drilling faults and normal drilling,and signals from the drill were analyzed to extract the characteristic signal.A multi-sensor information fusion system and a stop program were designed to recognize drilling faults and stop *** Signals from each sensor changed consistently in response to drilling condition changes,with high repeatability and *** average identification rate was 72.625%,68.575%,70.5% and 81.3% respectively for the three simulated drilling faults and normal *** stop program stopped drilling in 0.2～ 0.3 seconds when a drilling faults was *** This study shows that the forces acting on the drill bit change predictably in the three simulated drilling conditions;that using suitable BP neural networks,the drilling faults can be reliably identified,and that a stop program based upon characteristic signal recognition can stop drilling quickly upon detecting drilling *** lays a foundation for development of a system capable of predicting drilling faults and automatic drill *** studies are being undertaken for practical application of such a system.

关键词： drill otologic surgery force sensor back propagation(BP) neural network

Total Synthesis of (±)-Cordatolide A and its Anti-HIV Activity

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Chinese Chemical Letters 1999年第8期10卷 653-656页

作者： Qi GAO Lin WANG Xiao Tian LIANG (Institute of Materia Medica, peking union medical college & Chinese Academy of medical Sciences, beijing 100050) Institute of Materia Medica Peking Union Medical College Chinese Academy of Medical Sciences Beijing 100050 China

The natural product (±)-cordatolide A has been synthesized by a four-step approach starting from phloroglucinol, including Pechmann reaction, Friedel-Crafts acylation, cyclization. chromenylation and Luche reduction.

关键词： Total synthesis (±)-cordatolide A

N-Arylindne 1,4-Cycloaddition *** of Substituted Hexahydrofurol[3,2-c]quinolines

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Chinese Chemical Letters 1998年第11期9卷 983-985页

作者： Jun ZHAO Shu Feng CHEN Xiao Tian LIANG (Institute of Materia Medica,Chinese Academy of medical Sciences & peking union medical college,beijing 100050) Institute of Materia Medica Chinese Academy of Medical Sciences Peking Union Medical College Beijing 100050 China

Lewis acid catalyzed cycloaddition reactions of N-arylideneaniline Ⅰ with 2,3-dihydrofuran Ⅱ gave a pair of epimers d1-2, 3, 3a, 4, 5, 9b-hexahydro-4-arylfuro [3,2-c]quinolines Ⅲ and Ⅲ) and a few of their correspo... 详细信息

关键词： Cycloaddition reaction preparation ouinoline

Mass Spectral Behavior of Some Indole Schiff-Base Derivatives

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Chinese Chemical Letters 1999年第9期10卷 763-766页

作者： Li XU Shi Ping XU(Institute of Materia Medica, Chinese Academy of Mdical Sciencesand peking union medical college, beijing 100050) Chinese Acad Med Sci Inst Materia Medica Beijing 100050 Peoples R China peking union Med Coll Beijing 100050 Peoples R China

Twenty-two indole Schiff-base derivatives were synthesized. Two special ways of cleavage were discussed in the formation of the specific fragment ions in the mass spectra(MS).

关键词： Schiff-base cleavage specific fragment ions EI high resolution MS

Stereoselective Addition of Organotitanium and Grignard Reagents to 3,5-O-isopropylidene-L-glucurono-γ-lactone

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Chinese Chemical Letters 1998年第10期9卷 889-892页

作者： Hong CHEN Shao Yi SUN and De Quan YU(Institute of Meteria Medica, Chinese Academy of medical Sciences & peking union medical college, beijing 100050) Chinese Acad Med Sci Inst Mat Med Beijing 100050 Peoples R China peking union Med Coll Beijing 100050 Peoples R China

Substituted PhMgX and PhTi(OCHMe2)4MgX react with 3,5-O-isopropylidene-L-glucurono-γ-lactone 4 to give tetrads 5a-e and its stereoisomers 6a-e Tetrads 5a-e are the important intermediates in the synthesis of howiinol Al and its derivatives. The stereoselectivities of substituted PhTi(OCHMe2)4Mg (5a-e:6a-e ratio, 68-72:32-28) were better than those of substituted PhMgX(33-64:67-36) in the reaction. The effects of different substitUted groups and positions (p-Me, m-Me, o-MeO, p-Cl) of the phenyl ring on their stereoselectivies were not significant.

关键词： Organotitanium reagents Stereoselective reaction, 3,5-O-isopropylidene-L-glucurono-γ-lactone

Total Synthesis of (+)Villosol

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Chinese Chemical Letters 1997年第2期8卷 103-106页

作者： Ping XIE Shu Feng CHEN Xiao Tian LIANG(Institute of Materia Medica, Chinese Academy of medical Sciencesand peking union medical college, beijing 100050) CHINESE ACAD MED SCI INST MAT MEDBEIJING 100050PEOPLES R CHINA beijing union MED COLL BEIJING 100050PEOPLES R CHINA

The total synthesis of (+)villosol was accomplished by using the readily available (-)2 as starting material.

关键词： HNMR IR cm KBr Total Synthesis of Villosol MHz