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Chinese Science Bulletin 1997年第23期42卷 2005-2009页

作者： zhang, HY zhang, zy Chinese Acad Sci Inst Biophys Beijing 100101 Peoples R China

PERYLENEQUINONOID photosensitizers (PQP) have been a noticeable type of

关键词： perylenequinonoid photosensitizer excited state pKa value.

THE　SYNTHESIS　OF　ARYLOXY－CARBOXYLIC　ACID　UNDER　MICROWAVE，SOLID　BASE　AS　A　SUPPORT

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Chinese Chemical Letters 1996年第6期7卷 527-530页

作者： Wang, zy Shi, HJ Shi, HX zhang, zy ANHUI NORMAL UNIV DEPT CHEMWUHU 241000ANHUIPEOPLES R CHINA LANZHOU UNIV DEPT CHEMLANZHOU 730000PEOPLES R CHINA

A series of aryloxy-abet ic acids were synthesiedby the react ion of subst nuted plenols with cbloroaceticac id under the condit ion of microwave irradiation and withsol id base as a support. Tits method haB the advan... 详细信息

关键词： ACID CARBOXYLIC UNDER MICROWAVE SOLID AS ARYLOXY

Integral representation of M-band filters of Daubechies type

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Chinese Science Bulletin 1997年第10期42卷 803-807页

作者： Huang, DR Sun, QY zhang, zy Center for Mathematical Sciences Zhejiang University Hangzhou China

FOR natural integers M≥2 and N≥1,M-band filter _N^MH(ξ)of Daubechies type is a trigono-metric polynomial _N^MH(ξ)with real coefficients such

关键词： filter vanishing moment integral representation.

Further Report on A Novel Scission of Alkyl Carbonyl C-C Bond by Substituted 4-Hydroxyacetophenones

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Chinese Chemical Letters 1998年第10期9卷 899-902页

作者： Wang, J Tang, HT zhang, P Mak, TCW zhang, zy Peking Univ Dept Chem Beijing 100871 Peoples R China Chinese Univ Hong Kong Dept Chem Hong Kong Hong Kong

3-Methoxy-, 3, 5-dimethoxy-, and 3-phenyl-4-hydroxyacetophenones suffered alkyl carbonyl C-C bond scission to yield 4-hydroxybenzoate esters and 4-isopropenylphenols under standard conditions of ethylene ketal formation; the latter underwent in situ dimerization, cyclization, and rearrangement to give substituted indanols. The isopropenylphenol derived from 3,5-ditertbutyl-4-hydroxyacetophenone did not dimerize but condensed with its precursor to yield a substituted diphenylpropanone. 3-nitro-, 3,5-dinitro-, and 3,5-dibromo-4-hydroxyacetophenones on the other hand reacted normally to give ethylene ketals in good yields.

关键词： C-C bond scission phenolic hydroxy participation 4-hydroxyacetophenones indanols ethylene ketals

Effect of Solid/Liquid Interface Morphology on Microstructure and Segregation of DSX40M Superalloy

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Journal of Materials Science & Technology 1995年第1期11卷 56-60页

作者： SUN, LL WU, Q zhang, zy HU, ZG

The effect of solid/liquid interface morphologies on the microstructure and segregation of a new type superalloy, DSX40M, was studied. It has been found that the primary arm spacing presents maximum value as the solid/liquid interface shape transforms from cellular to cellular-dendritic. As the alloy solidifies with a coarse dendritic interface, the solute segregation degree and the average size of the carbide reach the maximum values because of the widest mushy zone. A Zr-rich phase forms at this range. Within the solidification rate range of dendritic interface, the primary dendritic arm spacing and solute segregation decrease with the increasing of solidification rate and the Zr-rich phase disappears. It should be indicated that the change of the solid/liquid interface does not vary the carbide type, but greatly affects the average size of the carbides. The quantitative results of the carbide size change in this alloy system with different solid/liquid interfaces is presented.

关键词： Effect of Solid/Liquid Interface Morphology on Microstructure and Segregation of DSX40M Superalloy

Clinical and Radiographic Study on Malignant Ameloblatoma Peking University School of Stomatology

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Clinical and Radiographic Study on Malignant Ameloblatoma Pe...

Electrical control of excitonic oscillator strength and spatial distribution in a monolayer semiconductor

第五届全国口腔颌面放射学术会议

作者： zhang zy, Wu YT

＜正＞ Department of Oral Radiology, Peking University School of StomatologyAim To investigate the clinical and radiographic features that differentiate malignantameloblastoma from *** The case records of the last 50 years of the patients attending the Department ofOral Radiology, Peking University School of Stomatology, were screened. The detailed histories

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Nano Research 2024年第9期17卷 8424-8430页

作者： Yanming Wang Junrong zhang Tianhua Ren Meng Xia Long Fang Xiangyi Wang Xingwang zhang Kai zhang Junyong Wang School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026China CAS Key Laboratory of Nanophotonic Materials and Devices&Key Laboratory of Nanodevices and Applications i-LabSuzhou Institute of Nano-Tech and Nano-Bionics(SINANO)Chinese Academy of SciencesSuzhou 215123China Institute of Applied Physics and Materials Engineering University of MacaoTaipaMacao 999078China College of New Energy Inner Mongolia University of TechnologyHohhot 010051China

Electrical modulation of luminescence is significant to modern light-emitting *** transition metal dichalcogenides are emerging direct-bandgap luminescent materials with unique excitonic properties,and the multiple exciton complexes provide new opportunities to modulate the property of luminescence in atomically thin ***,we report an electrical control of exciton emission in the oscillator strength and spatial distribution of excitons in a monolayer *** modulation of excitonic emission intensity with a degree of modulation of~92%has been demonstrated by an electric field at room *** spatial carrier redistribution tuned by a lateral electric field results in distinct excitonic emission patterns by *** modulation approach to exciton oscillator strength and distribution provides an efficient way to investigate the exciton diffusion dynamics and to construct electrically tunable optoelectronic devices.

关键词： monolayer semiconductor exciton electrical modulation spatial distribution

A healable, mechanically robust and ultrastretchable ionic conductive elastomer for durably wearable sensor

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Nano Research 2024年第4期17卷 3369-3378页

作者： Guoxian zhang Chunmei Li JiaoJun Tan Mingqi Wang Yafeng Ren Feijie Ge Qiuyu zhang Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi'an 710072China College of Bioresources Chemical and Materials Engineering National Demonstration Center for Experimental Light Chemistry Engineering EducationShaanxi University of Science&TechnologyXi’an 710021China

The ionic conductive elastomers show great promise in multifunctional wearable electronics,but they currently suffer from liquid leakage/evaporation or mechanical *** ionic conductive elastomers integrating non-volatility,mechanical robustness,superior ionic conductivity,and ultra-stretchability remains urgent and ***,we developed a healable,robust,and conductive elastomer via impregnating free ionic liquids(ILs)into the ILs-multigrafted poly(urethane-urea)(PUU)elastomer networks.A crucial strategy in the molecular design is that imidazolium cations are largely introduced by double-modification of PUU and centipede-like structures are obtained,which can lock the impregnated ILs through strong ionic *** this system,the PUU matrix contributes outstanding mechanical properties,while the hydrogen bonds and ionic interactions endow the elastomer with self-healing ability,conductivity,as well as non-volatility and *** fabricated ionic conductive elastomers show good conductivity(3.8×10^(-6) S·cm^(-1)),high mechanical properties,including tensile stress(4.64 MPa),elongation(1470%),and excellent healing ability(repairing efficiency of 90%after healing at room temperature for 12 h).Significantly,the conductive elastomers have excellent antifatigue properties,and demonstrate a highly reproducible response after 1000 uninterrupted extension-release *** work provides a promising strategy to prepare ionic conductive elastomers with excellent mechanical properties and stable sensing capacity,and further promote the development of mechanically adaptable intelligent sensors.

关键词： ionic conductive elastomers poly(urethane-urea)(PUU) ionic interactions centipede-like self-healing

Current status of radiology in China

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World Journal of Gastroenterology 2000年第2期6卷 193-197页

作者： Zeng SM Zhou KR zhang zy Peng WJ Yang FH Lin J Yang J Han XY Shanghai Med Univ Zhongshan Hosp Dept Radiol Shanghai 200032 Peoples R China

INTRODUCTIONRadiology has been greatly advanced in China sinceits founding in 1949 and has been developed fasterand further more since China adopted the policy ofsocioeconomic reform in *** plays anincreasingly important role in the medical healthcare and treatment in the country and has reachedthe world’s advanced level in certain *** nowbriefly review the history of China’s radiology so asto give a clear picture of its development.

关键词： radiology/history radiology/leducation radiology/trends China

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碳纳米管在生物医学领域的应用现状及展望

中国组织工程研究与临床康复 2007年第9期11卷 1758-1760页

作者：赵文张志愿上海交通大学医学院研究生部上海市200011 上海交通大学医学院附属第九人民医院口腔颌面外科上海市200011

目的:总结近年来炙手可热的新兴材料碳纳米管在医学领域中的应用现状,并展望其将来在该领域的应用前景。方法:应用计算机检索Medline2000-01/2006-01关于碳纳米管在生物医学方面应用的相关文章。检索词“carbonnanotubes,medicine”并... 详细信息

目的:总结近年来炙手可热的新兴材料碳纳米管在医学领域中的应用现状,并展望其将来在该领域的应用前景。方法:应用计算机检索Medline2000-01/2006-01关于碳纳米管在生物医学方面应用的相关文章。检索词“carbonnanotubes,medicine”并限定文章的语种类为English。同时利用计算机检索中国期刊全文数据库2000-01/2006-01的相关文章,限定文章语言种类为中文,检索范围限定为核心期刊,检索词“碳纳米管,生物医学”。结果:碳纳米材料能促进骨组织修复生长,促进神经再生,减少神经组织瘢痕产生。高强度碳纳米管可在养料、药品供给系统与细胞之间形成圆筒形的渠道,输送肽、蛋白质、质粒DNA或寡核苷酸等物质。应用碳纳米管特有的纳米结构对生物传感器的检测结果有放大作用,提高了传感器的检测限和灵敏度。结论:碳纳米材料具有较高的稳定性和良好的生物相容性,在生物医学领域将发挥更大的作用。

关键词：生物医学碳纳米管组织相容性