Browsing 化学化工－已发表论文 by Title
Now showing items 6720-6739 of 14235
-
QCM and EC-SPR Studies of Cytochrome c Self-assembled on Au Electrode and Enhancement of SPR Signal by Au Nanoparticles
(2012-11)Quartz crystal microbalance(QCM) and cyclic voltammetry(CV) were used to characterize the monolayer of cytochrome c(Cyt c), which was adsorbed on gold film modified with alkanethiol mixed monolayer. A direct comparison of ... -
QM/MM Molecular Dynamics Study of Purine-Specific Nucleoside Hydrolase
(2012-02-16)Although various T. vivax purine-specific inosine-adenosine-guanosine nucleoside hydrolase (IAG-NH) crystal structures were determined in recent years, the mechanistic details for the cleavage of N-glycosidic bond and the ... -
QM/MM study of catalytic methyl transfer by the N-5-Glutamine SAM-dependent methyltransferase and its inhibition by the nitrogen analogue of coenzyme
(JOHN WILEY & SONS INC, 2007-06)The combined density functional quantum mechanical/molecular mechanical (QM/MM) approach has been used to investigate methyl-transfer reactions catalyzed by the N-5-glutamine S-adenosyl-L-methionine (SAM)dependent ... -
QSAR analysis of substituted benzylamino- and heterocyclylmethylamino-carbodithioate derivatives of 4-(3H)-quinazolinone using CoMFA and SCORE2.0
(SCIENCE CHINA PRESS, 2007)Thymidylate synthase (TS) is a critical enzyme for DNA biosynthesis and many nonclassical lipophilic antifolates targeting this enzyme are quite efficient and encouraging as antitumor drugs. In this paper, the binding model ... -
Quadruple bonding in C-2 and analogous eight-valence electron species
(2012-03)Triple bonding is conventionally considered to be the limit for multiply bonded main group elements, despite higher metal-metal bond orders being frequently observed for transition metals and lanthanides/actinides. Here, ... -
Qualitatively graph-theoretical study on stability and formation of fullerenes and nanotubes
(SCIENCE CHINA PRESS, 2003)Kekule structures of different carbon species have been determined. On the basis of Kekue structure and C-C bond counts as well as the surface curvature, stability of diverse carbon species, driving force for curling of ... -
Quantification of selenium-tagged proteins in human plasma using species-unspecific isotope dilution ICP-DRC-qMS coupled on-line with anion exchange chromatography
(ROYAL SOC CHEMISTRY, 2008-08)Inductively coupled plasma dynamic reaction cell-quadrupole mass spectrometry (ICP-DRC-qMS) coupled on-line with anion exchange chromatography (AEC) has been developed for the quantification of selenium-tagged proteins in ... -
Quantitative analysis by solid-phase microextraction in nonequilibrium situations - Rapid determination of pollutant compounds (PAHs) in water
(HIGHER EDUCATION PRESS, 1999)Solid-phase microextraction technique has the advantages of a high efficiency, sensitivity, simple operation and solvent free. An optical fiber coated with 100 mu m polydimethylsiloxane is used to extract 10 PAHs. Since ... -
Quantitative analysis model for fiber-optic chemical sensors based on fluorescence quenching for analytes and its application
(SCIENCE PRESS, 2001)Because the fiber - optic chemical sensors based on the fluorescence quenching has an adjustable short distance from the membrane to the end of fiber optics, forming a space of microcell, a diminution of fluorescence is ... -
Quantitative correlation between defect density and heterogeneous electron transfer rate of single layer graphene
(American Chemical Society, 2014 Novem)Improving electrochemical activity of graphene is crucial for its various applications, which requires delicate control over its geometric and electronic structures. We demonstrate that precise control of the density of ... -
Quantitative detection of marine pathogenic bacteria using protein microarray immunoassay
(SCIENCE CHINA PRESS, 2006)A protein microarray immunoassay method was established in the detection and quantification of E. colt, V. fluvialis and V. parahaemolyticus in water. Cy3-rabbit immunoglobulin G (IgG) was used as a probe. 37 degrees C, ... -
Quantitative determination of zidovudine diaryl phosphate triester pro-drugs in rat plasma by high-performance liquid chromatography-electrospray ionization tandem mass spectrometry
(PERGAMON-ELSEVIER SCIENCE LTD, 2008-11)A rapid, simple, and sensitive high-performance liquid chromatography/electrospray ionization tandem mass spectrometry (HPLC/ESI-MS/MS) method was developed and validated for quantitative analysis of 3'-azido-3'-deoxythyrmidine ... -
Quantitative evaluation of hyperconjugation in the cyclopropylcarbinyl cation and in cyclopropylborane
(ELSEVIER SCIENCE BV, 1998-04-14)An orbital deletion procedure (ODP) at HF/6-311G** have been used to evaluate the hyperconjugation effects in the cyclopropylcarbinyl cation (1) and in cyclopropylborane (2), as well as the conjugation effects in the allyl ... -
Quantitative Model for the Surface-related Electron Transfer in CdS Quantum Dots
(HIGHER EDUCATION PRESS, 2009)The influence of surface S2- dangling bonds and surface doped ions(Se2-, Cu2+, and Hg2+) on the photoluminescence of Cd2+-rich CdS QDs was investigated. A quantitative model was proposed to understand the complex transfer ... -
Quantitative nucleation and growth kinetics of gold nanoparticles via model-assisted dynamic spectroscopic approach
(Academic Press Inc., 2013-10-01)Lacking of quantitative experimental data and/or kinetic models that could mathematically depict the redox chemistry and the crystallization issue, bottom-to-up formation kinetics of gold nanoparticles (GNPs) remains a ... -
Quantitative sample injection for capillary electrophoresis
(2003)An apparatus including a rotary-type injector was designed for quantitative sample injection in capillary electrophoresis (CE), in which both pressurized flow and electroosmotic flow were used to drive the background ... -
Quantitative study of longitudinal relaxation related to intermolecular dipolar interactions in solution NMR
(ELSEVIER SCIENCE BV, 2001-07-11)Longitudinal relaxation related to intermolecular dipolar interactions was investigated by solution NMR. A novel pulse sequence with selective pre-saturation and selective excitation was designed for a highly polarized ... -
Quantitative Valence Bond Studies of the Isoelectronic Series XO3- and BF3
(1995)Bonded tableau unitary group approach (BTUGA) is applied to the isoelectronic series XO(3)(-) (X=B(2-),C(-),N and O(+)) and BF(3) in the ab initio level. The relationship between structures and properties is analysed. ... -
Quantitatively predicate state of adhesion between coating/metal interface by EIS measurements
(PEKING UNIV PRESS, 2004)According to the experimental results and the basic concept that the capacitive contribution of the coating/metal system to EIS can reflect the change occurring at interface sensitively, the quantitative relationship between ... -
Quantum chemical research for heterometal four-nuclear cluster compounds of transition metal .1. Chemical bond of four-nuclear bimetal cluster formed from VIII and VIB-VIII elements
(ACTA CHIMICA SINICA, 1997)In this paper 18 four - nuclear bimetal cluster compounds formed from VIII group elements and 16 heteronuclear cluster formed from VIII - VIE group elements have be studied using DV - X alpha method of quantum chemistry. ...