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ROLE OF SYNTHETIC ANTIOXIDANTS ON THE AGING PROPERTY OF ELECTRON BEAM IRRADIATED NATURAL RUBBER

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Chinese Journal of Polymer Science 2005年第4期23卷 363-366页

作者： M.E.Haque K.Makuuchi F.Yoshii H.Mitomo Takasaki Radiation chemistry Research Establishment department of biological and Chemical Engineering

The aging property of radiation vulcanized natural rubber was studied using various kinds of *** test was done at 100℃ for various lengths of *** was found that some antioxidants are excellent in preventing the oxidative degradation of the irradiated ***(2,5-di-tert-amylhydroquinone)+CBP(2,2'-dihydroxy-3,3'-di(-methyl- cyclohexyl)-5,5'-dimethyl diphenyl methane)+P16(tris(2,4-di-tert-butylphenyl)phosphate)in a proportion of(1:0.5:0.5) was found to be the best combination to achieve 100% retention of tensile strength.

关键词： Aging Rubber Radiation Antioxidant Tensile

Investigation of the interaction between HIV-1 DNA and cyclic peptides by electrospray ionization mass spectrometry

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Chinese Chemical Letters 2009年第3期20卷 330-333页

作者： Yi Quan Liu Hui Hui Li Yun Hua Ye Gu Yua Beijing National Laboratory for molecular Sciences Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education Department of Chemical Biology College of Chemistry and Molecular Engineering Peking University Beifing 100871 China School of chemistry and Environmental Science Nanjing Normal University Nanjing 210097 China

The interaction between HIV-1 DNA and five cyclic peptides （CP1-CP5） was investigated using electrospray ionization mass spectrometry （ESI-MS）. It revealed that CP1 [c（Ala-Tyr-Leu-Ala-Gly）] and CP4 [c（Pro-D-Tyr... 详细信息

关键词： HIV-1 DNA Cyclic peptide ESI-MS

Crystal Structures of Schiff Base from 4-Aminoantipyrine and Pyridine-2-carboxaldehyde and Its Perchlorate

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Chinese Journal of Structural chemistry 2008年第12期27卷 1506-1510页

作者：谭明雄刘冰刘延成陈振锋周忠远梁宏 School of chemistry and Chemical Engineering Central South University Key Laboratory for the chemistry and molecular Engineering of Medicinal Resources (Guangxi Normal University) Ministry of Education of China School of chemistry and Chemical Engineering of Guangxi Normal University department of chemistry and biology of Yulin Normal College department of Applied biology and Chemical Technology Hong Kong Polytechnic University

The Schiff base pyridine-2-carboxaldehyde-4-aminoantipyrine （CI7H16N4O 1） and its perchlorate （C17H17N4O·ClO4 2） have been prepared and characterized by elemental analysis, IR spectra and single-crystal X-ray crystallography analysis. Both 1 and 2 crystallize in the monoclinic system, space group P21/c. For 1, a = 8.6820（12）, b = 24.934（3）, c = 7.0064（10） A,, β= 97.942（3）°, V = 1502.2（4） A^3, Z = 4, Dc = 1.293 g/cm^3, F（000） = 616,μ = 0.084 mm^-1, the final R = 0.0592 and wR = 0.1244. For 2, a = 5.9302（2）, b = 20.347（7）, c = 14.663（6） A, β= 90.200（9）°, V= 1769.201） A^3, Z = 4, Dc = 1.475 g/cm^3, F（000） = 816, μ = 0.254 mm^-1, the final R = 0.0533 and wR = 0.0819. As expected, both molecular structures of 1 and 2 adopt a trans configuration about the central C=N double bond. 2 is an ionic compound with the protonation at N（1） of pyridine-2-carboxaldehyde-4- aminoantipyrine.

关键词： crystal structure 4-aminoantipyrine pyridine-2-carboxaldehyde Schiff base

Synthesis of vinasse-dolomite nanocomposite biochar via a novel developed functionalization method to recover phosphate as a potential fertilizer substitute

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Frontiers of Environmental Science & Engineering 2020年第4期14卷 173-188页

作者： Nima Kamali Abdollah Rashidi Mehrabadi Maryam Mirabi Mohammad Ali Zahed Civil Water and Environmental Engineering FacultyShahid Beheshti University A.C.TehranIran Cell and molecular biology department Faculty of Biological SciencesKharazmi UniversityTehranIran

The effectiveness of phosphate(P)removal from aqueous solutions was investigated by novel low-cost biochars synthesized from vinasse and functionalized with calcined *** vinasse-derived biochar,synthesized via pyrolysis at different temperatures,showed easy preparation and a large surface *** novel vinasse biochar nanocomposites were prepared by adding dolomite to the vinasse biochars with different weight percentages(10,20 and 30%).The characteristics of the prepared materials were identified for further understanding of the inherent adsorption mechanism between P ions and vinasse ***-dolomite nanocomposite was very effective in the adsorption of P species from aqueous *** effect of the operational factors on Vinasse-dolomite nanocomposite was explored by applying response surface methodology(RSM).According to RSM results,the optimum condition was achieved to be contact time 90(min),250(mg/L)of P concentration and pH *** isotherm and kinetic studies were applied on experimental data to understand the adsorption *** Vinasse-dolomite nanocomposite revealed preferential P species adsorption in the presence of co-existing *** P species could be recovered by 1.0 MHC 1 where the efficiency was not affected up to the fifth *** P-loaded Vinasse-dolomite nanocomposite was successfully tested on a plant;it significantly improved its growth and proved its potency as a P-based fertilizer substitute.

关键词： Biochar Vinasse Dolomite Phosphate Fertilizer

Linking lncRNA to genomic stability

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Science China(Life Sciences) 2016年第3期59卷 328-329页

作者： Hong Liu department of Biochemistry and molecular biology Tulane University SOM

Long Non-coding RNAs （lncRNAs）, usually derived from intergenic regions or introns, play distinct and important roles in diverse biological processes. Up to now, many types of non-coding RNAs have been identified across spe- cies. They are highly heterogeneous in their lengths, struc- tures, and functions. Aberrant regulation of lncRNAs has been shown to be associated with human diseases, such as cancer, but the mechanisms have remained largely unknown （Rinn and Chang 2012）. A recent study from Mendell and colleagues published in Cell dissected a novel pathway in which a specific IncRNA, termed NORAD, protects cells from becoming aneuploid （Lee et al., 2016）, which is known to drive the occurrence and development of cancer, among other diseases.

关键词：稳定性基因组非编码RNA 链接人类疾病基因间隔区生物过程细胞分离

Coronarenes: recent advances and perspectives on macrocyclic and supramolecular chemistry

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Science China chemistry 2018年第8期61卷 993-1003页

作者： Mei-Xiang Wang MOE Key Laboratory of Bioorganic Phosphorous chemistry & Chemical biology Department of Chemistry Tsinghua University

Synthetic macrocyclic host molecules always play an essential role in the establishment and development of supramolecular chemistry. Along with the continuous interests in the study of classical macrocycles, recent decades have witnessed the emergence and rapid development of the chemistry and supramolecular chemistry of novel and functional macrocycles. Owing to their easy availability, a self-tunable V-shaped cavity resulted from 1,3-alternate conformation, and diversified electronic features steered by the interplay between heteroatom linkages and aromatic rings, heteracalixaromatics act as a type of versatile and powerful macrocyclic hosts in molecular recognition and fabrication of supramolecular systems. Very recently, by means of engineering the bond connectivity or the recombination of chemical bonds within heteracalixaromatics, we have devised coronarenes, a new generation of macrocycles. In this concise review, macrocyclic and supramolecular chemistry of coronarenes are summarized in the order of their syntheses, structural features, molecular recognition and self-assembly properties. In the last part of this article, personal perspectives on the study of macrocyclic and supramolecular chemistry will also be discussed.

关键词： coronarenes heteracalixaromatics macrocycles molecular recognition non-covalent bond interactions

Synthesis and Characterization of [(C_5H_4SiMe_2~tBu)_2Ln(μ-S^nBu)]_2 (Ln=Y,Er)

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Chinese Journal of Structural chemistry 2008年第5期27卷 523-528页

作者：李艳荣张正星陈珍霞刘瑞婷周锡庚 department of chemistry Molecular Catalysis and Innovative Material Laboratory Fudan University

（C5H4SiMe2^tBu）2Ln^nBu reacted with 1 equiv, of elemental sulfur in toluene at ambient temperature to yield the corresponding lanthanocene thiolates [（C5H4SiMe2^tBu）2Ln（μ-S^nBu）]2 （Ln = Y （1）, Er （2））. Complexes 1 and 2 have been characterized by elemental analysis, IR, mass spectroscopy and X-ray single-crystal diffraction analysis. Both complexes are of monoclinic with space group P21/c, formula C52H94S2Si4Y2 1 （C52H94S2Si4Er2 2） Mr = 1073.57 （1230.27）, a = 8.495（2）（8.41（2））, b = 26.913（8）（26.67（7））, c = 13.756（4）（13.68（4）） A, α = 90（90）, β = 101.184（5）（101.57（4））, γ = 90 （90）°, V= 3085.1（15）（3007（14）） A^3, Dc = 1.156 （1.359） g·cm^-3, Z= 2 （2）, F（000） = 1144 （1260）, μ = 2.046 （2.951） cm^-1, R = 0.0687 （0.0749） and wR = 0.1306 （0.1507） for observed reflections with I 〉 2σ（I）. X-ray structures of 1 and 2 definitively prove that only one sulfur atom is inserted into the Ln-C（^nBu） bond, forming a thiolate ligand.

关键词： organolanthanide crystal structure insertion elemental sulfur thiolate

Synthesis,Structure and Photoluminescence of a New Ir Complex Based on Pyridine-2,3-dicarboxylic Acid

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Chinese Journal of Structural chemistry 2017年第2期36卷 280-285页

作者：孙长艳关俊卿何翔李文军常志东 School of chemistry and biological Engineering University of Science and Technology Beijing department of chemistry Shanghai University

A new complex Ir（ppy）2（Hpda）（Hppy=2-phenylpyridine, H2pda=pyridine-2,3-dicarboxylic acid） has been synthesized and characterized. According to single-crystal X-ray diffraction analyses, the title complex crystallizes in the monoclinic system, space group P21/n with a=8.5708（10）, b=22.685（2）, c=12.5722（15） , β=96.19（1）°, V=2430.2（5） 3, C（29）H（20）N3O4 Ir, Mr=666.22, Z=4, Dc=1.833 g/cm3, F（000）=1304, μ=5.54 mm（-1）, λ（Mo Kα）=0.71073 , GOOF=1.02, the final R=0.049 and w R=0.119 for 4680 independent reflections with Rint=0.069. The title complex is of mononuclear structure. Intermolecular C–H···O hydrogen bonds and π-π stacking interactions result in the formation of a 3D supramolecular network. Photoluminescent spectra show that one intense emission band with the maximum of 516 nm can be observed in the title complex.

关键词： dicarboxylic supramolecular monoclinic stacking bonds intense complexes carboxylate pyridine luminescent

Thermochemical Study on Ternary Solid Complex of La(Gly)_2(Ala)_3Cl_3·2H_2O(s)

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Journal of Rare Earths 2007年第3期25卷 373-376页

作者：叶丽娟李强国李旭杨德俊刘义 department of chemistry and Life Science Xiangnan University College of chemistry and molecular Science Wuhan University

The complex of lanthanum chloride with Glycine and Alanine,La（Gly）2（Ala）3Cl3·2H2O,was synthesized and characterized by IR,elementary analysis,thermogravimetric analysis,and chemical *** dissolution enthalpies of LaCl3 ·7H2O（s）,2Gly（s）＋ 3Ala（s）and La（Gly）2（Ala）3Cl3 ·2H2O（s）were determined in 2 mol·L-1 HCl by a solution-reaction isoperibol *** designing a thermochemical cycle in terms of Hess＇ Law and through calculation,the reaction enthalpy of lanthanum chloride seven-hydrate with Glycine and Alanine was obtained：ΔrHθm（298.15 K）=（29.652±0.504）kJ·mol-1,and the standard enthalpy of formation of La（Gly）2（Ala）3Cl3·2H2O（s）ΔfHθm [La（Gly）2（Ala）3Cl3·2H2O,s,298.15 K]=-4467.6±8.3 kJ·mol-1.

关键词： lanthanum complex Glycine Alanine thermochemistry standard molar enthalpy of formation rare earths