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Study on the reaction of C60 with DL-valine and cyclohexanone

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Chinese Journal of Chemistry 1996年第6期14卷 555-560页

作者： Zheng, DG Li, YL Mao, Z Zhu, db CHINESE ACAD SCI INST CHEMBEIJING 100080PEOPLES R CHINA

Reaction of C-60 with DL-valine and cyclohexanone in refluxing chlorobenzene under N-2 yields three [60]fulleropyrrolidine derivatives (mono-, bis- and triadduct) which are characterised on the basis of spectroscopies and cyclic voltammetry. It is found that the ratio of the three products greatly depends on the reaction conditions.

关键词： C-60 1,3-dipolar cycloaddition reaction fulleropyrrolidine

AROYL HYDRAZONES CONTAINING TRIAZOLE AND THEIR BIVALENT METAL COMPLEXES

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Chinese Chemical Letters 1995年第10期6卷 891-892页

作者： Wang, db Liang, YM Ma, YX Lanzhou Univ Dept Chem Lanzhou 730000 Peoples R China

Two new ligands, aroyl hydrazones containing triazole and some of their bivalent transition metal complexes have boom synthesized. The complexes were characterized by elemental analyses, IR, UV, XPS and thermal analys...

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Crystal Structure and Magnetic Studies of a New Nitronyl Nitroxide Compound

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Chinese Chemical Letters 2000年第8期11卷 749-752页

作者： Ding, L Zhang, DQ Zhang, B Zhu, db Chinese Acad Sci Ctr Mol Sci Inst Chem Organ Solids Lab Beijing 100080 Peoples R China

Compound 1 was first synthesized and characterized. Its crystal structure and magnetic property were determined and investigated. Discussion about the molecule packing in crystal and the macroscopic magnetism was also... 详细信息

关键词： nitronyl nitroxide crystal structure spin density magneto-structural relationship

ISOTHERMAL PRECISION FORGING PROCESS OF ALUMINUM ALLOY CYLINDRICAL HOUSING

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中国有色金属学会会刊：英文版 1997年第3期7卷 124-127页

作者： Wang, Z Xue, KM Shan, db Xu, FC Lu, Y HARBIN INST TECHNOL SCH MAT SCI & ENGNHARBIN 150001PEOPLES R CHINA

ＩＳＯＴＨＥＲＭＡＬＰＲＥＣＩＳＩＯＮＦＯＲＧＩＮＧＰＲＯＣＥＳＳＯＦＡＬＵＭＩＮＵＭＡＬＬＯＹＣＹＬＩＮＤＲＩＣＡＬＨＯＵＳＩＮＧ①ＷａｎｇＺｈｅｎ，ＸｕｅＫｅｍｉｎ，ＳｈａｎＤｅｂｉｎ，ＸｕＦｕｃｈａｎｇ，ＬｕＹ... 详细信息

ＩＳＯＴＨＥＲＭＡＬＰＲＥＣＩＳＩＯＮＦＯＲＧＩＮＧＰＲＯＣＥＳＳＯＦＡＬＵＭＩＮＵＭＡＬＬＯＹＣＹＬＩＮＤＲＩＣＡＬＨＯＵＳＩＮＧ①ＷａｎｇＺｈｅｎ，ＸｕｅＫｅｍｉｎ，ＳｈａｎＤｅｂｉｎ，ＸｕＦｕｃｈａｎｇ，ＬｕＹａｎＳｃｈｏｏｌｏｆＭａｔｅｒｉａ...

关键词： aluminum alloy isothermal precision forging assembled die heating range

Synthesis and Electrochemical Studies on BEDT-TTF Derivatives with Hydroxyl Groups

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Chinese Chemical Letters 2000年第10期11卷 883-886页

作者： Li, HX Zhang, DQ Xu, W Zhu, db Chinese Acad Sci Ctr Mol Sci Organ Solids Lab Inst Chem Beijing 100080 Peoples R China

New electron donors with hydroxyl groups were synthesized and characterized spectroscopically. Their redox potentials were determined with cyclic voltammetry, and the comparison with BEDT-TTF [Bis(ethylenedithio)tetrathiafulvalene] in this aspect was made. These results indicated that the new electron donors had similar electron-donating capabilities as BEDT-TTF.

关键词： electron donor hydroxyl group hydrogen bond redox potential

Using strategically applied grazing to manage invasive alien plants in novel grasslands

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Ecological Processes 2013年第1期2卷 275-285页

作者： Jennifer Firn Jodi N Price Ralph db Whalley School of Earth Environmental and Biological SciencesQueensland University of TechnologyBrisbaneQLD 4001Australia School of Plant Biology University of Western AustraliaCrawleyWA6009Australia Botany University of New EnglandArmidaleNSW 2352Australia

Introduction:Novel ecosystems that contain new combinations of invasive alien plants(IAPs)present a challenge for ***,control strategies that focus on the removal of the invasive species and/or restoring historical disturbance regimes often do not provide the best outcome for long-term control of IAPs and the promotion of more desirable plant ***:This study seeks to identify the primary drivers of grassland invasion to then inform management practices toward the restoration of native *** revisiting both published and unpublished data from experiments and case studies within mainly an Australian context for native grassland management,we show how alternative states models can help to design control strategies to manage undesirable IAPs by manipulating grazing ***:Ungulate grazing is generally considered antithetical to invasive species management because in many countries where livestock production is a relatively new disturbance to grasslands(such as in Australia and New Zealand as well as Canada and the USA),selective grazing pressure may have facilitated opportunities for IAPs to *** find that grazing stock can be used to manipulate species composition in favour of the desirable components in pastures,but whether grazing is rested or strategically applied depends on the management goal,sizes of populations of the IAP and more desirable species,and climatic and edaphic ***:Based on our findings,we integrated these relationships to develop a testable framework for managing IAPs with strategic grazing that considers both the current state of the plant community and the desired future state—*** application of the principles behind reclamation,rehabilitation,restoration or all three—over time.

关键词： grassland grazing Canada

Facile Bromination of Aromatic Ethers with Quaternary Ammonium Bromide and Iodosylbenzene

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Chinese Chemical Letters 1998年第1期9卷 7-9页

作者： Jiang, YL Li, YC Yang, BG Gao, db Tan, JY Yuan, YC Univ Adelaide Dept Chem Adelaide SA 5005 Australia Shanghai Res Inst Petrochem Technol Shanghai 201208 Peoples R China Dalian Univ Technol Sch Chem Engn Dalian 116012 Peoples R China

Aromatic ethers were conveniently brominated with quaternary ammonium bromide and iodosylbenzene in glacial acetic acid under mild conditions to give the corresponding monobromo-aromatic ethers in nearly quantitative ... 详细信息

关键词： bromination aromatic ether quaternary ammonium bromide iodosylbenzene

Self-organization of Gold Nanoparticles Protected by 9-(5-Thiopentyl)-carbazole

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Chinese Chemical Letters 2001年第12期12卷 1141-1144页

作者： Wang, S Li, YL Du, CM Shi, ZQ Xiao, SX Fang, HJ Zhu, db Chinese Acad Sci Inst Chem Ctr Mol Sci Beijing 100080 Peoples R China

Through the reduction of [AuCl4] by aqueous sodium borohydride in the presence of 9-(5-thiopentyl)-carbazole, the gold nanoparticles has been prepared and characterized.

关键词： 9-(5-thiopentyl)-carbazole gold nanoparticles

Site-specific uv crosslinking of minihelix DNA and TrpRS from Bacillus subtilis

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Chinese Science Bulletin 2001年第16期46卷 1380-1383页

作者： Xu, F Jiang, G Zhang, Y Zhu, LF Jin, YX Wang, db Chinese Acad Sci Shanghai Inst Biol Sci Inst Biochem & Cell Biol State Key Lab Mol Biol Shanghai 200031 Peoples R China

In order to investigate the recognition mechanism and the relationship between structure and function of minihelix DNA with Tryptophanyl-tRNA Synthetase (TrpRS), TrpRS from Bacillus Subtilis was purified. Four minihelix DNAs were chemically synthesized and the photoreactive reagent s4T was incorporated into three of them at the positions of G73, T72 and T55 corresponding to tRNATrp. The apparatus for uv crosslinking was devised and the parameters for uv crosslinking were optimized. The results indicated that the G73 and T72 base of minihelix DNA interacted with TrpRS directly. The uv crosslinking reaction was improved by the dose of uv irradiation and the concentration of both TrpRS and minihelix DNA.

关键词： uv crosslinking minihelix DNA TrpRS discriminator.