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Two new glycosides from the seeds of Cassia obtusifolia

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Chinese Chemical Letters 2009年第9期20卷 1097-1099页

作者： Cun Zhang Gui liu li Yong Qing xiao li li zhen Pang Institute of Traditional Chinese Materia Madica Chinese Academy of Chinese Medical Sciences Beijing 100700 China

Two new glycosides, nor-rubrofusadn-6-O-β-D-（6＇-O-acetyl）glucopyranoside （1） and 1-desmethylaurantio-obtusin-2-O-β-D- glucopyranoside （2） were isolated from the seeds of Cassia obtusifolia and their structures were established by chemical and spectral evidences. 2009 Yong Qing xiao. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： Cassia obtusifolia Nor-rubrofusarin-6-O-β-D-(6'-O-acetyl)glucopyranoside 1-Desmethylaurantio-obtusin-2-O-β-D-glucopyranoside

Dehalogenation of Aryl Halides Catalyzed by MontK10 Immobilized PVP-Pd-Sn Catalyst in Aqueous System

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Chinese Chemical Letters 2001年第4期12卷 287-290页

作者： xiao li zhen Jian Rong HAN Ru Hong KANG Xing Mei OUYANG Department of Essential Education Hebei Science(Technique UniversityShijiazhuang 050018 Department of Chemistry Heibei Normal UniversityShijiazhuang 050016

A series of PVP-Pd-Sn/MontK10 catalysts were prepared by immobilization of PVP[poly(N-vinyl-2-pyrrolidone)] supported bimetallic catalyst using MontK10 as carrier. This catalyst has good catalytic activity for hydrogen transfer dehalogenation of aryl halides. The catalytic reaction was carried out in aqueous system in the presence of phase transfer catalyst and sodium formate as hydrogen source. The catalyst with loading Pd 0.19wt% and molar ratio of Pd/Dn 8:1 gives the highest activity and good stability. This catalyst is more reducible with NaBH4. It is also found that the catalyst is easily separated from the reaction system.

关键词： Phase transfer catalyst aryl halide dehalogenation MontK10

MiR-301a promotes embryonic stem cell differentiation to cardiomyocytes

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World Journal of Stem Cells 2019年第12期11卷 1130-1141页

作者： li-xiao zhen Yu-Ying Gu Qian Zhao Hui-Fang Zhu Jin-Hui Lv Shu-Jun li zhen Xu li li Zuo-Ren Yu Key Laboratory of Arrhythmias of the Ministry of Education of China Tongji University School of MedicineShanghai 200120China Research Center for Translational Medicine Shanghai East HospitalTongji University School of MedicineShanghai 200120China Department of Microbiology and Immunology Wenzhou Medical CollegeWenzhou 325000Zhejiang ProvinceChina

BACKGROUND Cardiovascular disease is the leading cause of death *** repair after pathological injury in the heart remains a major challenge due to the limited regenerative ability of cardiomyocytes in *** cell-derived cardiomyocytes provide a promising source for the cell transplantation-based treatment of injured *** To explore the function and mechanisms of miR-301a in regulating cardiomyocyte differentiation of mouse embryonic stem(mES)cells,and provide experimental evidence for applying miR-301a to the cardiomyocyte differentiation induction from stem *** mES cells with or without overexpression of miR-301a were applied for all functional *** hanging drop technique was applied to form embryoid bodies from mES *** markers including GATA-4,TBX5,MEF2C,andα-actinin were used to determine cardiomyocyte differentiation from mES *** High expression of miR-301a was detected in the heart from late embryonic to neonatal *** of miR-301a in mES cells significantly induced the expression of cardiac transcription factors,thereby promoting cardiomyocyte differentiation and beating cardiomyocyte clone *** is a target gene of miR-301a in ***-regulated PI3K-AKT-mTOR-Stat3 signaling showed involvement in regulating miR-301a-promoted cardiomyocyte differentiation from mES *** MiR-301a is capable of promoting embryonic stem cell differentiation to cardiomyocytes.

关键词： miR-301a Mouse embryonic stem cells Differentiation Cardiomyocytes

Total Synthesis of N-Methylsansalvamide A

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Chinese Chemical Letters 2006年第6期17卷 761-764页

作者： Shou Xin liU Yan Lou GENG Xia TIAN xiao li zhen Jian Rong HAN College of chemical ＆ pharmaceutical Engineering Hebei University of Science ＆ Tecnnology Shijiazhuang 050018

Total synthesis of N-methylsansalvamide A was accomplished in solution phase by a convergent approach. An N-Boc-td-depsipepide 6 and a dipeptide ester 10 were prepared in the yield of 89% and 91%, respectively. Cycliz... 详细信息

关键词： Synthesis N-methylsansalvamide A solution phase cyclic depsipeptide.

Synthesis and characterization ofα-{3-[(2,3-dihydroxy) propoxy]propyl}-ω-butylpolydimethylsiloxanes

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Chinese Chemical Letters 2009年第6期20卷 729-732页

作者： xiao li Zhan zhen Huan Luo Qing Hua Zhang Bi Chen Feng Qiu Chen Department of Chemical and Biochemical Engineering. Zhejiang University Hangzhou 310027 China

Hydrosilylation has been carried out between Si-H terminated polydimethylsiloxanes with narrow molecular weight distribution and protected 3-allyloxy-l,2-propanediol, and after subsequently alcoholyzed, α-{3-[（2,3-dihydroxy）propoxy]propyl}-ω- butyl-polydimethylsiloxanes with varying number of （（Si（CH3）2-O） unit were obtained. At each step, the produced compounds were carefully characterized. The results showed that each step was successfully carried out and target products were achieved.

关键词： Polydimethylsiloxane Anionic ring-opening polymerization Hydrosilylation Alcoholysis

Synergistic Interaction and Gelation in Cationic Guar Gum-Sodium Alginate System

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Wuhan University Journal of Natural Sciences 2004年第3期9卷 371-374页

作者： HeDong-bao lili-hua liQing Yangxiao-zhen SchoolofResourcesandEnvironmentalSciences WuhanUniversityWuhan430072HubeiChina

The synergistic interaction between the cationic guar gum (the ammonium hydroxy-propyl-trimethyl chloride of guar gum) and sodium alginate has been studied. The effects of the mass ratio of them, mixed temperature, balk salt ion concentration, incubation time and pH value on gelation were investigated. It has been observed that there was a gel strength maximum when the mass ratio was 0.6, the mixed temperature was 70°C, the balk salt ion concentration was 1.0 mol·L?1, the incubation time was 30 min and the pH value was 8. Interaction between molecules of these two polysaccharides was investigated by FT-IR spectrometry. Key words cationic guar gum - sodium alginate - gelation - synergism CLC number O 629.12 Foundation item: Supported by the National Natural Science Foundation of China(29574173)Biography: He Dong-bao (1945-), male, Associate professor, research direction: modifying and gelating of natural polysaccharides.

关键词： cationic guar gum sodium alginate gelation synergism

Cloning and Expression Pattern of a Gene Encoding a Putative Plastidic ATP/ADP Transporter from Helianthus tuberosus L.

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Journal of Integrative Plant Biology 2005年第9期47卷 1123-1132页

作者： Kun MENG Tuan-Jie CHANG Xiang liU Song-Biao CHEN Yong-Qin WANG Ai-Jun SUN Hong-lin XU xiao-li WEI zhen ZHU Institute of Genetics and Developmental Biology the Chinese Academy of Sciences Beijing 100101 China

Herein, we report the cloning and molecular characterization of a full cDNA encoding a putative plastidic ATP/ADP transporter, designated HtAATP, for Helianthus tuberosus L. The ATP/ADP translocator protein was isolated from the tuber-cDNA library of H. tuberosus for the first time. The predicted HtAATP protein was judged as a plastidic ATP/ADP translocator protein from its high homology at the amino acid sequence level to the two Arabidopsis thaliana plastidic ATP/ADP translocator proteins AATP1 and AATP2 （84.8% and 79.9% identity, respectively）. Amino acid sequence analysis of the primary structure of HtAATP revealed that it belonged to the plastidic ATP/ADP transporter family. Hydropathy prediction indicated that HtAATP gene product is a highly hydrophobic membrane protein that contains 10 transmembrane domains to form a spanning topology. Southern blotting analysis showed that the HtAATP gene is a single-copy gene in the H. tuberosus genome. Tissue distribution analysis showed that the HtAATP gene is prominently expressed in sink tissues. A stable expression pattern in tubers at different developmental stages implies an active involvement of HtAATP during carbohydrate formation.

关键词： expression pattern Helianthus tuberosus plastidic ATP/ADP transporter.

Introduction to Professor HUA Yan-ling's Acupuncture Experience: Ⅰ. Nape Acupuncture

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Journal of Acupuncture and Tuina Science 2003年第1期1卷 9-11页

作者： QI li-zhen xiao Yuan-chun Shanghai Research Institute of Acupuncture and Meridian 200030 China

On the basis of abundant clinical practice, *** makes a thorough study of the acupuncture indications and stubborn diseases in the light of syndrome differentiation and treatment in Chinese medicine as well as the etiology and pathogenesis in western medicine, as a result, to develop his unique styles acupuncture, sacroiliac acupuncture, sacral acupuncture and others. Now they are presented as follows.

关键词： syndrome differentiation clinical practice western medicine Chinese medicine

Introduction to Professor HUA Yan-ling's Acupuncture Experience: Ⅱ .Paravertebral Acupuncture, Sacroiliac Acupuncture and Sacral Acupuncture

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Journal of Acupuncture and Tuina Science 2003年第2期1卷 3-5页

作者： QI li-zhen xiao Yuan-chun Shanghai Research Institute of Acupuncture and Meridian 200030 China

Pro. HUA had practiced traditional Chinese medicine and acupuncture for about 50 years, borne excellent medical skills and was then highly respected by his colleagues and patients. In his large amount of practice, he combined syndrome differentiation in Chinese medicine and disease differentiation in western medicine in order to work hard on acupuncture indications and some stubborn diseases. With the time going on and medical cases accumulating, some unique treatment styles had been formed, such as Jiaji (paravertebral) acupuncture, sacroiliac acupuncture and sacral acupuncture. They are briefly introduced as follows.

关键词： traditional Chinese medicine syndrome differentiation western medicine in order