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421.
系统介绍了γ-聚谷氨酸水凝胶的制备方法及其生物可降解性、高吸水性及保湿性、pH敏感性、生物相容性和可修饰性等性能,同时综合介绍了其在组织工程、药物控释和创面修复等方面的应用,结合本研究组工作对其未来的发展进行了展望。 相似文献
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Purification and Characterization of an Antibacterial Peptide from Rana Temporaria Chensinensis Skin 总被引:1,自引:0,他引:1
GOU Xiao jun LI Xiang hui DING Tian bing WANG Yong ting CHEN Huai yong HUANG Cheng fang DONG Qing chu LI Qing shan * 《高等学校化学研究》1999,(4)
IntroductionInadditiontothehighlyspecificcell-mediatedimmunesystem,vertebratesandotherorganismshaveadefensesystemmadeupofdistinctgroupsofbroad-spectrumantibacterialpeptides[1—3].Antibacterialpeptidescanbeclassifiedintotwogroupsbasedonhavingdisul-fide… 相似文献
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1 INTRODUCTIONCopper( ) displays a wide diversity in its structural chemistry,the copper co-ordination number ranging from two to four.Procedures to synthesize copper( )complexes are of greatinterestbecause of the diversity of products resulting from al-mostthe same methodology.Ithaslong been accepted thatcopper( ) complexesarediamagnetic and provide no optical absorption bands( no d- d transition isencountered) for a copper( ) ion with a d10 configuration and no electron spin reso-n… 相似文献
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Fu She HAN Jian Qiang QU Xin ZHANG Meng Xian DING Lian Xun GAO* PCLCC State Key Laboratory of Polymer Physics Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 《中国化学快报》2000,11(12)
Previously, we have reported a novel type of polyimides prepared from 3,3(-dioxo-1,1((3H,3(H)spirobi[isobenzofuran]-5,6,5(,6(-dianhydride 1a and a variety of diamines1. Considering that a spiral compound is planar asymmetry2, we recently studied the resolution of 1, and thereof, synthesized the optically active polyimides. To our knowledge, optically active polyimides containing a planar asymmetric monomers have not been reported thus far. Cinchonidine and cinchonine base were proved to be an… 相似文献
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Yu ZHAO * Yuan Ling KU Shoei Sheng LEE* Laboratory of Phytochemistry Kunming Institute of Botany Chinese Academy of Sciences Kunming School of Pharmacy College of Medicine National Taiwan University Taipei 《中国化学快报》2000,11(12)
One of the strategies of bettering Alzheimer's Disease is focused on cholinergic compound based on the cholinergic hypothesis1. An important approach to cholinergic augmentation is administration of cholinesterase inhibitors such as Huperzine A2. Territrem B is a potent AChE inhibitor (IC50 47 nM, H. Zea AchE)3, and its inhibitory mechanism is totally different with the known AChE inhibitors4. In the last report we have described three routes of synthesizing Territrem B analogues, whic… 相似文献
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ZHAO YanYing WANG Peng ZHANG Wei TIAN JinRong* & WEI ZhiYi Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sci- ences Beijing China College of Applied Science Beijing University of Technology Beijing China 《中国科学G辑(英文版)》2007,50(3):261-266
A compact femtosecond Ti:sapphire laser resonator consisting of three chirped mirrors and one output coupler was designed. By accurately balancing the intra- cavity dispersions between Ti:sapphire crystal, air and chirped mirrors, we directly generated the laser pulse shorter than 7 fs at the average power of 340 mW with 3.1 W pump. The repetition rate of the laser oscillator is 173 MHz at the centre wavelength of 791 nm, and the ultrabroaden spectrum covers from 600 nm to 1000 nm. To the best of our knowledge, this is the simplest laser resonator capable of generating sub-10 fs laser pulse. 相似文献
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Zheng LI Xi Cun WANG* College of Chemistry Chemical Engineering Northwest Normal University Lanzhou 《中国化学快报》2002,(8)
1,4-Disubstituted thiosemicarbazides have attracted much attention in recent years because of their fungicidal1-2, bactericidal3-4 and tuberculostatic5-6 activities. Meanwhile, aryloxy acetic acid derivatives have also been used as herbicides and plant-growth regulators7-10. These applications prompt us to develop a simple and rapid synthetic method to prepare a series of new compounds bearing both thiosemicarbazide and aryloxyacetyl moieties, with the object of obtaining new biologically ac… 相似文献
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Wei ZHANG Jian Li HUA Jin Gui QIN* Department of Chemistry Wuhan University Wuhan 《中国化学快报》2002,13(10)
This paper reports the synthesis and the nonlinear optical property of a series of new chromophores which contain furan ring as the only conjugation bridge for the first time. They are characterized by UV-VIS, FT-IR, 1H NMR, MS and elemental analysis. Their dipole moment and the first-order molecular hyperpolarizability (β) are calculated and compared with those of the analogues containing either benzene or thiophene as the conjugation bridge. 相似文献