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581.
NaLI Qi Tai ZHENG Zhi Da MIN* Department of Natural Products Chemistry China Pharmaceutical University Nanjing Institute of Materia Medica Chinese Academy of Medical Sciences & Peking Union Medical College Xian Nong Tan street Beiji 《中国化学快报》2001,(10)
Pueraria peduncularis (Grah. ex Benth.) Benth. is a plant of Leguminosae which grows in the southwest of China. Different from other plants of Pueraria, it could not be used as a medicine due to its toxicity1. In order to use the Pueraria plants safer, we studied the constituents of P. peduncularis. Previous phytochemical studies of an n-BuOH extract afforded three triterpenoid saponins2-3. The continuing investigation on CHCl3 extract led to the isolation of a new indole alkaloid. … 相似文献
582.
In previous paper and work, we reported the synthesis and cytotoxicity studies of a novel series of short chain peptide conjugates of the cytotoxic agent 2, 6-dimethoxyhydro -quinone-3-mercaptoacetic acid1 (DMQ-MA). The DMQ-MA is a derivative of 2,6-dimethoxybenzoquinone, which is a natural product of fermented wheat germ and found to have a wide spectrum of cytotoxicity against various tumor cell lines under the synergistic activation of L-ascorbic acid (AH2)2,3. Compared with DMQ, DMQ… 相似文献
583.
WANG Wei WANG Yu-hong Li Wei * *Biological Macromolecular Laboratory College of Life Science Jilin University Changchun P. R. China 《高等学校化学研究》2002,18(4):491-494
IntroductionBioinformatics is coming with Human GenomeProject(HGP) . With the explosions of sequence,structural and other information available ,bioinformatics is playing an increasingly large rolein the study of fundamental biomedical problems.At present and in the near future,it is the mainchallenge for bioinformatists to make gene dicoveryand annotation of human genome sequences whenthe vast amount of data is produced by the highthroughput genome sequencing in a large scale andautomated m… 相似文献
584.
LI Bo * Yoshifumi KOIDE Kunio ESUMI . Toyota Central R & D Labs. Inc. Yokomichi Nagakute Aichi Japan . Departemnt of Applied Chemistry Institute of Colloid Interface Science Science University of Tokyo 《高等学校化学研究》2002,18(2):206-210
IntroductionInclusioncompoundshavebeennotedinrecentyearsandresorcinol typecalix [4 ]arenehasbeenstudiedfortheirinclusionabilitiesbyScheiderandBugleretal[1— 3] .Thepolyolmoietiesincalix[4 ]re sorcinareneformrigidhydrogen bondingnetworks[4 ] ,andcalix [4 ]resorcinare… 相似文献
585.
CHEN Wei YUAN Hong-ming JIANG Yu-sheng HUO Hua CHEN Jie-sheng *State Key Laboratory of Inorganic Synthesis Preparative Chemistry Jilin University Changchun P. R. China 《高等学校化学研究》2002,18(4):375-379
IntroductionSince Wilson and co- workers successfullysynthesized three- dimensional microporousaluminophosphates (Al PO4 - n ) [1] in the 1 980 s,much attention has been focused on the explorationof1 - D chain,2 - D layer and3 - D open- frameworkmetal phosphates from aqueous or non- aqueoussystems.The number of metals incorporated intothe frameworks of these materials is continuouslyincreasing and the metals include Be[2 ] ,Ga[3] ,In[4 ] ,Sn[5] ,Sb[6 ] ,and the transition metals Zn[7] ,Ni… 相似文献
586.
Antioxidative Effect of Schiff Bases with o-Hydroxybenzylidene Groupon Free Radical Induced Hemolysis of Human Red Blood Cell 总被引:1,自引:0,他引:1
LUO Xu yang ZHAO Jian zhang LIN Ying jie LIU Zai qun * College of Chemistry Jilin University Changchun P. R. China 《高等学校化学研究》2002,18(3):287-289
IntroductionThe recent development of free radical biologyand medicine has provided a great deal of clinicaland experimental evidence indicating that the freeradical induced peroxidation of membrane lipids isassociated with a variety of chronic healthproblems,such as cancer,atherosclerosis andageing[1,2 ] . Both natural and synthetic antioxidantshave been used to trap peroxyl radicals and/orinitiating radicals to protect the membrane lipidsagainst free radical chain reactions,and hence mayhave… 相似文献
587.
Shui Hua TANG Li Zhen GAO Bao Chun LIU He LI Bo Lan ZHANG Liang Fu ZHANG Zuo Long YU* Chengdu Institute of Organic Chemistry Chinese Academy of Sciences Chengdu Institute of Chemical Engineering Materials CAEP Mianyang 《中国化学快报》2001,(11)
With the diminution of fossil fuel resources and the increase in pollution, energy and environment have become a public concern. Mankind is in need of a new but clean energy resource. The use of hydrogen appears to be the answer. One of the technical challenges in hydrogen utilization is H2-storage. At present, materials for storing hydrogen are alloys such as LaNi5 and FeTi; the storage capacity is around 1.4 wt%, too low for practical application. Another problem with these alloys is… 相似文献
588.
Qian Yong XU Tong Xing WU Xin Fu PAN* Department of Chemistry National Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 《中国化学快报》2001,(12)
Although the asymmetric additions of diethylzinc to aldehydes have been extensively studied in the presence of chiral catalyst, most of the chiral ligands tested are b-amino alcohols1. In this report, the synthesis of chiral gamino alcohols 1-4 from the reaction of (+)-camphor and (-)-menthone with 2-lithiomethyl-6-methyl-pyridine or 2-picolly- lithium2, which give a single diasteromer as determined by 1H NMR with high yields (Scheme 1)3, and their application in the enantioselective additio… 相似文献
589.
Photodynamic therapy (PDT), using red light and photosensitizers (Sens ), is a promising new treatment for tumor. The naturally occurred hypocrellins,including hypocrellin A (HA) and hypocrellin B (HB,1), have been proposed as the potential photosensitizers for PDT. It has been the subject of many investigations to improve the red absorption and water-solubility of natural hypocrellins by the structural modifications1~3. In this paper, a new derivative 2 was synthesized from 1 and charact… 相似文献
590.
Yu Liang ZHANG Ming Xing QIAN Ren HE* State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian 《中国化学快报》2001,(12)
Transition-metal-catalyzed oligomerzation of ethylene is an important process to provide a-olefins in the C6~C20 range. In recent years, the catalytic behavior of late transition metal complexes containing bi- and tri-dentate ligands for oligomerization of ethylene to a-olefins has attracted much attention. When oligomerization of ethylene catalyzed by nickel diimine and Fe(II), Co(II) 2,6-bis(imino)pyridine catalysts, the oligomers with high average molecular weight were obtained1-5. Eth… 相似文献