搜索结果: 1-15 共查到“化学 temperature”相关记录35条 . 查询时间(0.313 秒)
Temperature Dependence of Electron Transfer to the M-Side Bacteriopheophytin in Rhodobacter capsulatus Reaction Centers
hydrogenation fatty acids stereoselectivity kinetics
2016/5/25
Subpicosecond time-resolved absorption measurements at 77 K on two reaction center (RC) mutants of Rhodobacter capsulatus are reported. In the D(LL) mutant the D helix of the M subunit has been substi...
Temperature Dependence of the Electric Field Modulation of Electron-Transfer Rates:Charge Recombination in Photosynthetic Reaction Centers
solar energy inorganic, organic, physical and analytical chemistry photosynthesis reaction kinetics electric fields electron transfer entropy experimental data free energy mathematical models
2016/5/23
The rates of electron-transfer reactions can be systematically varied by application of external electric fields. The electric field effect on the charge recombination rate constant of the state P[sup...
Coherent quantum transport in disordered systems: II. Temperature dependence of carrier diffusion coefficients from the time-dependent wavepacket diffusion method
time-dependent wavepacket diffusion carrier diffusion coefficient static and dynamic disorder band-like to hopping-type transport
2014/9/24
The time-dependent wavepacket diffusion method for carrier quantum dynamics (Zhong and Zhao 2013J. Chem. Phys.138014111), a truncated version of the stochastic Schrödinger equation/wavefunction a...
A hybrid stochastic hierarchy equations of motion approach to treat the low temperature dynamics of non-Markovian open quantum systems
A hybrid stochastic hierarchy equations low temperature dynamics non-Markovian open quantum systems
2014/9/24
The hierarchical equations of motion technique has found widespread success as a tool to generate the numerically exact dynamics of non-Markovian open quantum systems. However, its application to low ...
Equilibrium-reduced density matrix formulation: Influence of noise, disorder, and temperature on localization in excitonic systems
Equilibrium-reduced density matrix formulation noise disorder temperature localization in exciton systems
2014/9/24
An exact method to compute the entire equilibrium-reduced density matrix for systems characterized by a system-bath Hamiltonian is presented. The approach is based upon a stochastic unraveling of the ...
Temperature-Dependence of the Amide-I Frequency Map for Peptides and Proteins
Amide-I Frequency map Infrared spectrum Molecular dynamics simulation
2012/4/5
In our recent work [Phys. Chem. Chem. Phys. 11, 9149 (2009)], a molecular-mechanics force field-based amide-I vibration frequency map (MM-map) for peptides and proteins was constructed. In this work, ...
Efficient energy transfer in light-harvesting systems, I: optimal temperature, reorganization energy, and spatialtemporal correlations
Efficient energy transfer light-harvesting systems optimal temperature reorganization energy spatio temporal correlations
2014/9/24
Understanding the mechanisms of efficient and robust energy transfer in light-harvesting systems provides new insights for the optimal design of artificial systems. In this paper, we use the Fenna-Mat...
Rapid Temperature-Programmed Separation and Retention Prediction on a Novel Packed-Capillary Column in Gas Chromatography
Temperature-Programmed Separation Retention Prediction Novel Packed-Capillary Column
2010/9/13
Novel packed-capillary columns for gas chromatography were developed with a thin-wall stainless-steel capillary of 1.0 mm i.d.; and rapid temperature-programmed separations have been carried out after...
Transpiration Rate Measurement Using Miniature Temperature/Humidity Sensors
Transpiration Rate Measurement Miniature Temperature Humidity Sensors
2010/9/14
A novel method for the evaluating the transpiration rate (TR) has been proposed. Miniature temperature/humidity loggers were attached onto the leaf surface of a mangrove plant, Bruguiera gymnorrhiza, ...
Evaluation of Outermost Surface Temperature of Silicon Substrates during UV-Excited Ozone Oxidation at Low Temperature
Evaluation Outermost Surface Temperature Silicon UV-Excited Ozone Oxidation Low Temperature
2010/9/17
Using ultraviolet (UV)-excited ozone gas, we prepared high-quality SiO2 films that can be used as gate dielectric films on poly-silicon or silicon wafers without sample heating. The UV-excited ozone g...
不同贮存温度蜂花粉的可见-近红外光谱鉴别（Application of Visible/Near Infrared Spectroscopy for Discrimination of Bee Pollen under Different Storage Temperature）
可见-近红外光谱技术 蜂花粉 贮存温度
2009/11/3
利用可见-近红外光谱技术结合最小二乘支持向量机（LS-SVM）对不同贮存温度下的蜂花粉进行鉴别。选择-20、4、15、25和40℃ 5个温度下分别贮存60d后的蜂花粉为研究对象。对原始光谱数据进行平滑和附加散射校正（MSC）的预处理后进行主成分分析，选择4～20个主成分作为输入变量进行LS-SVM建模。模型预测参数比较结果显示，当主成分数取20时模型的预测效果最好，预测相关系数r2p≥0.9919...
Zeolite catalyzed efficient synthesis of perimidines at room temperature
Diaminonaphthalene perimidine zeolite
2010/4/8
Arylperimidines, 3(a-l), were synthesized in good yields by cyclocondensation reaction of 1,8-diaminonaphthalene and aromatic aldehydes in the presence of NaY zeolite as a catalyst. The simple environ...
An Efficient Solid Acid Promoted Synthesis of Quinoxaline Derivatives at Room Temperature
silica sulfuric aci quinoxaline 1 2-diketone 1 2-diamine enzilmonoxime
2007/12/19
摘要 Quinoxaline derivatives have been synthesized in a very short time with excellent yields by the condensation of 1,2-diamines with aliphatic or aromatic 1,2-dicarbonyl compounds or benzilmonoxime in...
Low Temperature CO Oxidation Kinetics over Activated Carbon Supported Pt-SnOx Catalysts
FATMA SOYAL BALTACIOĞ LU BERRİ N GÜ LYÜ Z AHMET ERHAN AKSOYLU ZEYNEP İ LSEN Ö NSAN
2010/4/16
The kinetics of low temperature CO oxidation were studied over sequentially impregnated 1wt%Pt-0.25wt%SnOx supported on HNO3-oxidized activated carbon (AC3) using a wide range of CO (1-10 mol%) and O2...
六次甲基四胺与氯化钴室温固相反应机制的研究（Mechanism of Room-temperature Solid State Reaction of Hexamethylene Tetramine with Cobaltous Chloride）
室温固相反应 冷熔融机理 紫外-可见漫反射 反应动力学
2010/8/18
The cold-melting mechanism and the cold-dissolving-melting mechanism were further studied by TG/DSC and in situ micro-photographs techniques with the mixture of hexamethylene tetramine and CoCl2·6H2O ...