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Reverse binding ability of Four Calix[ 4 ] crowns in Gas and Acetonitrile towards Butylamine Isomers

有机化学 2003年第Z1期23卷 186-187页

作者： ZHANG Guo-Zhu LI Yuan-Yuan WANG Min LIU Yan-Fei HE Jia-Qi HE Xi-Wen CHENG Jin-Pei Department of Chemistry Nankai University Tianjin 300071 China Department of Chemistry Nankai University Tianjin 300071 China Department of Chemistry Nankai University Tianjin 300071 China Department of Chemistry Nankai University Tianjin 300071 China Department of Chemistry Nankai University Tianjin 300071 China Department of Chemistry Nankai University Tianjin 300071 China Department of Chemistry Nankai University Tianjin 300071 China

　　Synthetic host molecules having neutral organic cavities capable of accommodating bio significant moleculars are of great interest in supramolecular chemistry these days.[1] Calixarenes, as the third generation of the host supramolecules after crown ether and cyclodextrin, can serve as good "flatform" to design versatile selective recep- tors for ionic and neutral molecules. [2]……

关键词： binding ability supramolecular chemistry host molecules crown ether

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Quantitative characterization of Cu binding potential of dissolved organic matter （DOM） in sediment from Taihu Lake using multiple techniques

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Frontiers of Environmental Science & Engineering 2014年第5期8卷 666-674页

作者： Yuan ZHANG Yan ZHANG Tao YU State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing 100012 China Tianjin Academy of Environmental Sciences Tianjin 300191 China

Dissolved organic matter （DOM） plays an important role in heavy metal speciation and distribution in the aquatic environment especially for eutrophic lakes which have higher DOM concentration. Taihu Lake is the third largest freshwater and a high eutrophic lake in the downstream of the Yangtze River, China. In the lake, frequent breakout of algae blooms greatly increased the concentration of different organic matters in the lake sediment. In this study, sediment samples were collected from various part of Taihu Lake to explore the spatial difference in the binding potential of DOM with Cu. The titration experiment was adopted to quantitatively characterize the interaction between Cu（II） and DOM extracted from Taihu Lake sediments using ion selective electrode （ISE） and fluorescence quenching technology. The ISE results showed that the exogenous DOM had higher binding ability than endogenous DOM, and DOM derived from aquatic macrophytes had a higher binding ability than that derived from algae. The fluorescence quenching results indicated that humic substances played a key role in the complexation between DOM and Cu（II） in the lake. However, because of the frequent breakout of algae blooms, protein-like matters are also main component like hnmic matters in Taihu Lake. Therefore, the metals bound by protein-like substances should be caused concern as protein-like substances in DOM were unstable and they will release bound metal when decomposed.

关键词： binding ability dissolved organic matters,fluorescence quenching complex capacity Taihu Lake

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Functional characterization of a Niemann-Pick type C2 protein in the parasitoid wasp Micropfitis mediator

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Insect Science 2018年第5期25卷 765-777页

作者： Yao Zheng Shan-Ning Wang Yong Peng Zi-Yun Lu Shuang Shan Ye-Qing Yang Rui-Jun Li Yong-Jun Zhang Yu-Yuan Guo State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences Beijing China College of Plant Protection Agricultural University of Hebei Baoding Hebei Province China IPM Center of Hebei Province Key Laboratory of Integrated Pest Management on Crops in Northern Region of North China Ministry of Agriculture Plant Protection Institute Hebei Academy of Agricultural and Forestry Sciences Baoding Hebei Province China College of Plant Protection China Agricultural University Beijing China

Niemann-Pick type C2 （NPC2） is a type of small soluble protein involved in lipid metabolism and triglyceride accumulation in vertebrates and arthropods. Recent stud- ies have determined that NPC2 also participates in chemical communication of arthropods. In this work, two novel NPC2 proteins （MmedNPC2a and MmedNPC2b） in Microplitis mediator were identified. Real-time quantitative PCR （qPCR） analysis revealed that Mmed- NPC2a was expressed higher in the antennae than in other tissues of adult wasps compared with MmedNPC2b. Subsequent immunolocalization results demonstrated that NPC2a was located in the lymph cavities of sensilla placodea. To further explore the binding charac- terization of recombinant MmedNPC2a to 54 candidate odor molecules, a fluorescence binding assay was performed. It was found MmedNPC2a could not bind with selected fatty acids, such as linoleic acid, palmitic acid, stearic acid and octadecenoic acid. How- ever, seven cotton volatiles, 4-ethylbenzaldehyde, 3,4-dimethylbenzaldehyde, fl-ionone, linalool, m-xylene, benzaldehyde and trans-2-hexen-l-al showed certain binding abilities with MmedNPC2a. Moreover, the predicted 3D model of MmedNPC2a was composed of seven r-sheets and three pairs of disulfide bridges. In this model, the key binding residues for oleic acid in CjapNPC2 of Camponotus japonicus, Lue68, Lys69, Lys70, Phe97, Thr103 and Phe127, are replaced with Phe85, Ser86, His87, Leu113, Tyr119 and Ile143 in MmedNPC2a, respectively. We proposed that MmedNPC2a in M. mediator may play roles in perception of plant volatiles.

关键词： binding ability chemical communication immunolocalization Microplitismediator NPC2 protein 3D model

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2-Pyrrole Carboxylic Acid Nitro-Phenylamide: New Colorimetric Sensor for Anion

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有机化学 2003年第Z1期23卷 184-184页

作者： YIN Zhen-Ming YANG Wen-Zhi HE Jia-Qi ZHU Xiao-Qing CHENG Jin-Pei Department of Chemistry Nankai University Tianjin 300071 Department of Chemistry Nankai University Tianjin 300071 Department of Chemistry Nankai University Tianjin 300071 Department of Chemistry Nankai University Tianjin 300071 Department of Chemistry Nankai University Tianjin 300071

　　Due to the role played by anions in the field of biology and environmental chemistry, the development of selec tive and sensitive chemosensor for anion sensing is a topic of current attention. Colorimetric anion sensor, which does not require the use of a potentiostate or spectrometer to detect redox or optical perturbation, can give immediate qualitative anion sensing information by visual detection and therefore has advantages over other molecular sensors.According the anion binding ability of some pyrrolic amides reported by Schmuck and Gale, we linked the color reporter group of nitroanile to pyrrole moiety and synthesized two 2-pyrrole carboxylic acid nitro-phenylamides (1 and 2).……

关键词： Carboxylic Acid carboxylic acid binding ability

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