Now showing items 3982-4001 of 14240

    • H-1 MAS NMR characterization of hydrogen over silica-supported rhodium catalyst 

      Chao, ZS; 晁自胜; Wu, TH; 吴廷华; Ye, JL; 叶剑良; Chen, GZ; 陈国周; Wan, HL; 万惠霖 (SCIENCE PRESS, 2001)
      Hydrogen species in both SiO2 and Rh/SiO2 catalysts pretreated in different atmospheres (H-2. O-2, helium or air) at different temperatures (773 or 973 K) were investigated by means of H-1 MAS NMR. In SiO2 and O-2-pretreated ...
    • H-1 MAS NMR spectra of hydroxyl species on diatomite surface 

      Yuan, P; Wu, DQ; Chen, Z; 陈忠; Chen, ZW; Lin, ZY; 林种玉; Diao, GY; Peng, JL (SCIENCE PRESS, 2001)
      High spinning speed H-1 magic-angle spinning nuclear magnetic resonance (1H MAS NMR) was used to detect surface hydroxyl groups of diatomite, which include isolated hydroxyl groups and hydrogen-bonded hydroxyl groups, and ...
    • H-1 MAS NMR spectra of kaolinite/formamide intercalation compound 

      Wang, LJ; Yuan, P; Chen, ZW; Chen, Z; 陈忠 (SCIENCE CHINA PRESS, 2002)
      The high spinning speed H-1 magic angle spinning nuclear magnetic resonance (H-1 MAS NMR) technique was employed to distinguish the two groups of surface hydroxyls of kaolinite and investigate the intercalation mechanism ...
    • H-1 NMR properties of trinuclear transition-metal complexes [M-3 O-square(OOCR)(6)L-3](+) (M = Cr, Fe, Mn; R = CH3, C2H5,CH2NH2; L = C5H5N, H2O) 

      Chen, Z.; 陈忠; Cai, SH; 蔡淑惠; Ye, JL; 叶剑良; Zhang, LN; 张琳娜; Lu, GT; 卢葛覃 (CHINESE JOURNAL STRUCTURAL CHEMISTRY, 1999)
      A series of oxo-centered trinuclear transition-metal complexes with general formula [(M3O)-O-II(OOCR)(6)L-3](+) (M = Cr, Fe, Mn; R = CH3, C2H5, CH2NH2; L = C5H5N, H2O) were studied by H-1 NMR spectra. The investigation was ...
    • H-1 NMR spectroscopy analysis of metabolites in the kidneys provides new insight into pathophysiological mechanisms: applications for treatment with Cordyceps sinensis 

      Zhong, Fang; Liu, Xia; Zhou, Qiao; Hao, Xu; Lu, Ying; Guo, Shanmai; Wang, Weiming; Lin, Donghai; Chen, Nan; 林东海 (NEPHROL DIAL TRANSPL, 2012-02)
      The number of patients with chronic kidney disease (CKD) is continuously growing worldwide. Treatment with traditional Chinese medicine might slow the progression of CKD. In this study, we evaluated the renal protective ...
    • H-1 NMR study on the products of the catalytic reduction of ethyne by nitrogenase in D2O 

      Chen, Z; 陈忠; Lin, GX; 林国兴; Cai, SH; 蔡淑惠; Xu, X; 徐昕; Huang, JW; 黄静伟; Wan, HL; 万惠霖; Cai, QR; 蔡启瑞 (ACTA CHIMICA SINICA, 1999)
      The products of the catalytic reduction ethyne by nitrogenase in D2O were studied by H-1 NMR. In order to assign the H-1 NMR spectrum, the theoretical spectra of C2H2D2 were calculated using group symmetry. The final ...
    • H-1 NMR-based metabolomic analysis of triptolide-induced toxicity in liver-specific cytochrome P450 reductase knockout mice 

      Liu, Xia; Xue, Xiang; Gong, Likun; Qi, Xinming; Wu, Yuanfeng; Xing, Guozhen; Luan, Yang; Xiao, Ying; Wu, Xiongfei; Li, Yan; Chen, Min; Miao, Lingling; Yao, Jun; Gu, Jun; Lin, Donghai; Ren, Jin (SPRINGER, 2012-10)
      Triptolide (TL) is an active component of Tripterygium wilfordii Hook. F which is used to treat autoimmune and inflammatory disease. However, a high incidence of adverse effects is often observed in clinic. Previously we ...
    • H-1 NMR-based Metabonomic Analysis of Metabolic Changes in Streptozotocin-induced Diabetic Rats 

      Zhao, Liangcai; Liu, Xia; Xie, Liyun; Gao, Hongchang; Lin, Donghai; 林东海 (ANAL SCI, 2010-12)
      Diabetes mellitus is a complex metabolic disorder characterized by chronic hyperglycemia, hypoinsulinemia, and ketosis. To access the biochemical process of diabetes, we applied quantitative H-1 NMR-based metabonomics to ...
    • H-1, C-13 and N-15 backbone and side-chain resonance assignments of reduced CcmG from Escherichia coli 

      Wu, Chengyan; Hong, Jing; Liao, Xinli; Guo, Chenyun; Wu, Xueji; Hu, Hongyu; Lin, Donghai; 廖新丽; 郭晨云; 吴学记; 林东海 (SPRINGER, 2013)
      CcmG is a periplasmic, membrane-anchored protein widely distributed in a variety of species. In Escherichia coli, the CcmG protein always acts as a weak reductant in the electron transport chain during cytochrome c maturation ...
    • H-1, C-13, N-15 backbone and side-chain resonance assignments of the human adenylate kinase 1 in apo form 

      Fu, Cuiping; Peng, Yu; Liao, Xinli; Guo, Chenyun; Lin, Donghai; 廖新丽; 郭晨云; 林东海 (SPRINGER, 2013)
      AK1 (Adenylate Kinase 1) plays crucial roles in processes such as cellular phosphotransfer networks, neuronal maturation and regeneration, gating of ABC transporter CFTR, tumor cell metabolism and myocardial energetic ...
    • H-1, C-13, N-15 backbone and side-chain resonance assignments of the human Raf-1 kinase inhibitor protein 

      Yi, Cuiying; Peng, Yu; Guo, Chenyun; Lin, Donghai; 郭晨云; 林东海 (BIOMOL NMR ASSIGN, 2011-04)
      Raf-1 kinase inhibitor protein (RKIP) plays a pivotal role in modulating multiple signaling networks. Here we report backbone and side chain resonance assignments of uniformly N-15, C-13 labeled human RKIP.
    • H-1-NMR-based metabonomic analysis of metabolic profiling in diabetic nephropathy rats induced by streptozotocin 

      Zhao, Liangcai; Gao, Hongchang; Lian, Fulin; Liu, Xia; Zhao, Yongxiang; Lin, Donghai; 林东海 (AM J PHYSIOL-RENAL, 2011-04)
      Zhao L, Gao H, Lian F, Liu X, Zhao Y, Lin D. H-1-NMR-based metabonomic analysis of metabolic profiling in diabetic nephropathy rats induced by streptozotocin. Am J Physiol Renal Physiol 300: F947-F956, 2011. First published ...
    • H-2-uptake activity, spectra, reduction potentials, and kinetics of iron release on the surface of iron core from Azotobacter vinelandii bacterial ferritin 

      Huang, HQ; 黄河清; Xu, LS; Zhang, FZ; Qiu, XH; Lin, QM; Huang, JW; Zao, H; Huang, NC; Zeng, RY; Zeng, D (PLENUM PUBL CORP, 1998)
      Bacterial ferritin from Azotobucter vinelandii (AvBF(o)) has a function in H-2 uptake. The Fe3+ reduction on the surface of the iron core from AvBF(o) is accompanied simultaneously by H-2 uptake, with a maximum activity ...
    • H-D kinetic isotope effects of alcohol electrooxidation on Au, Pd and Pt electrodes in alkaline solutions 

      Ren, Jie; Yang, Yao-Yue; Zhang, Bin-Wei; Tian, Na; Cai, Wen-Bin; Zhou, Zhi-You; Sun, Shi-Gang; 田娜; 周志有; 孙世刚 (ELSEVIER SCIENCE INC, 2013)
      The identification of rate-determining step (RDS) is vital for understanding reaction mechanisms and designing advanced catalysts. Here, we systemically studied the H-D kinetic isotope effects (KIEs) on electrooxidation ...
    • H-Phosphonate-Mediated Amination of Quinoline N-Oxides with Tertiary Amines: A Mild and Metal-Free Synthesis of 2-Dialkylaminoquinolines 

      Chen, Xiaolan; Li, Xu; Qu, Zhibo; Ke, Diandian; Qu, Lingbo; Duan, Likun; Mai, Wenpeng; Yuan, Jinwei; Chen, Jianyu; Zhao, Yufen; 陈小兰; 赵玉芬 (WILEY-V C H VERLAG GMBH, 2014-06-16)
      A synthetic strategy has been developed for the synthesis of 2-dialkylaminoquinolines from easily available quinoline N-oxides, tertiary amines, diisopropyl H-phosphonate and carbon tetrachloride (CCl4) in one pot under ...
    • “H_2SO_4-H_2C_2O_4混合液中各组分测定”综合性实验的教学探索 

      林金华 (《实验室研究与探索》编辑部, 2011-11)
      [中文文摘]综合性实验是把基础化学理论知识,各种实验技能和实验方法加以归纳、分析、相互渗透的一种有效实验形式。综合性实验的开设对培养乃至提高学生的实验技能、创新意识、实践能力和综合素质具有重要意义。文章结合"H2SO4-H2C2O4混合液中各组分测定",对综合性实验的设计、实施和教学效果进行探索。[英文文摘]Comprehensive experiment is an efficient experimenting method which ...
    • H_2在K~0-MWCNTs上储存和吸附/脱附特性研究 

      武小满; 王毅; 董昆明; 周金梅; 林国栋; 张鸿斌 (2005-03-30)
      利用高压容积法辅以卸压升温脱附排水法,测定金属K修饰多壁碳纳米管对H2的吸附储存容量.结果表明,在室温(25℃),7.25MPa实验条件下,x%K0-MWCNTs(x%=30%~35%,质量百分数)对H2的吸附储存容量可达3.80wt%(质量百分数),是相同条件下单纯MWCNTs氢吸附储量的2.5倍;室温下卸至常压的脱附氢量为3.36wt%(占总吸附氢量的~88%),后续升温至673K的脱附氢量为0.41wt%(占总吸附氢量的~11%) ...
    • H_2在金属钾修饰碳纳米管上的吸附与储存 

      武小满; 周振华; 王毅; 周金梅; 林国栋; 张鸿斌 (2003-07-30)
      利用高压容积法、辅以卸压升温脱附排水法,测定金属钾修饰多壁碳纳米管(K~0-MWCNTs)对H_2的吸附储存容量。结果表明,在室温(~25℃)、~7.25MPa实验条件下其对氢的吸附储存容量可达3.80%(质量百分数);室温下卸至常压的脱附氢量为3.36%(占总吸附氢量的~89%),后续升温(升至673K)的脱附氢量为0.41%(占总吸附氢量的~11%)。
    • H_3PW_(12)O_(40)催化合成己二酸 

      李华明(海南师范学院化学系); 纪明慧(海南师范学院化学系); 林海强; 舒火明(海南师范学院化学系); 柳镇安(海南师范学院化学系) (《精细化工》编辑部, 2003-06)
      [中文文摘]以环己烯为原料,w(H2O2)=30%的过氧化氢为氧化剂,在草酸(H2C2O4)作为助剂的条件下,采用磷钨酸(H3PW12O40)作催化剂合成己二酸,结果表明,当n(环己烯)∶n(H3PW12O40)∶n(H2C2O4)∶n(H2O2)=100∶1∶1∶538,反应温度为92℃,反应时间为6h时,己二酸的收率可达70 1%。讨论了H3PW12O40加入量、环己烯加入量、过氧化氢加入量、反应时间、反应温度等因素对反应的影响。[英文文摘]Using ...
    • H_3反应势能面的构建——计算化学实验设计 

      袁汝明; 傅钢; 韩国彬 (2011)
      介绍一个针对高年级本科生的物理化学探索性实验。通过计算化学手段构建H3反应势能面,使学生初步掌握gAuSSIAn03W,gAuSSVIEW5.0和OrIgIn软件的使用,深入理解反应过渡态理论,并进一步了解目前势能面的研究动态。