Kinetic Evaluation of Phenolase Activity of Tyrosinase Using Simplified Catalytic Reaction System

2003 ◽  
Vol 125 (43) ◽  
pp. 13034-13035 ◽  
Author(s):  
Shin-ichi Yamazaki ◽  
Shinobu Itoh
Keyword(s):  
Catalytic Reaction ◽  
Reaction System ◽  
Kinetic Evaluation

Detection of L-Tert-Leucine in the Enzyme-Catalyzed Reaction System

2013 ◽  
Vol 641-642 ◽  
pp. 717-720
Author(s):  
Sheng Deng ◽  
Li Cui ◽  
Li Min Ma
Keyword(s):  
Quality Control ◽  
Correlation Coefficient ◽  
Flow Rate ◽  
Catalytic Reaction ◽  
Reaction System ◽  
Direct Determination ◽  
Average Recovery ◽  
Enzyme Catalytic Reaction

Direct Determination of L-Ter-Leucine in Enzyme Catalytic Reaction System by HPLC Was Studied. the Detection Were Performed on a Kromasil 700-5C18 Column Using a Eluant Containing 0.25% (NH4)H2PO4 and 100% Methanol (V((NH4)H2PO4):V(methanol)=100:5) with the Flow Rate of 0.8 Ml/min at,detection Wavelength of 205nm. there Was a Good Line Correlation between Peak Area and Contents in the Rang of 0.2-10 Mg/ml, the Correlation Coefficient Was 0.9986, the Average Recovery Was 98.88% with a Relative Stand Deviation of 0.78% (n=5). this Method Is Simple, Stable, Accurate and Reliable for the Quality Control of L–ter-Leucine.

scholarly journals Kinetic Evaluation of the Charge Migration and H2O2 Transport Rates During the Electrocatalytic Reduction of H2O2 on Thin Prussian Blue Films

2019 ◽  
Vol 92 (3) ◽  
pp. 403-410
Author(s):  
Egon Rešetar ◽  
Sandra Čičić ◽  
Damir Iveković
Keyword(s):  
Diffusion Coefficient ◽  
Apparent Diffusion Coefficient ◽  
Prussian Blue ◽  
Catalytic Reaction ◽  
Reduced Form ◽  
Electrocatalytic Reduction ◽  
Charge Migration ◽  
Kinetic Evaluation ◽  
Apparent Diffusion ◽  
Electrocatalytic Reaction

Kinetic analysis of the electrocatalytic reduction of H2O2 on electrodes modified with thin Prussian blue films was performed and a full set of kinetic parameters governing the rate of the electrocatalytic reaction was determined. Rate constant (κ·k') for the catalytic reaction between H2O2 and the reduced form of Prussian blue incorporating interstitial Cs+ and K+ ions was calculated to be equal to 3.1·106 and 2.3·106 cm3·mol–1 s–1, respectively. The diffusion coefficient of H2O2 and the apparent diffusion coefficient of electrons in the reduced form of Prussian blue were found to be κ·DS(H2O2) = 2.6·10–7 cm2/s and De = 2.8·10–12 cm2/s, respectively.

scholarly journals Research of Hydrogen Preparation with Catalytic Steam-Carbon Reaction Driven by Photo-Thermochemistry Process

2013 ◽  
Vol 2013 ◽  
pp. 1-7
Author(s):  
Xiaoqing Zhang ◽  
Bingqing Xu ◽  
Yan Xu ◽  
Shuyong Shang ◽  
Yongxiang Yin
Keyword(s):  
Solar Energy ◽  
Conversion Efficiency ◽  
Catalytic Reaction ◽  
Hydrogen Generation ◽  
Reaction System ◽  
Chemical Energy ◽  
Xenon Lamp ◽  
Rate Of Reaction ◽  
Catalyst Content ◽  
Content Range

An experiment of hydrogen preparation from steam-carbon reaction catalyzed by K2CO3was carried out at 700°C, which was driven by the solar reaction system simulated with Xenon lamp. It can be found that the rate of reaction with catalyst is 10 times more than that without catalyst. However, for the catalytic reaction, there is no obvious change for the rate of hydrogen generation with catalyst content range from 10% to 20%. Besides, the conversion efficiency of solar energy to chemical energy is more than 13.1% over that by photovoltaic-electrolysis route. An analysis to the mechanism of catalytic steam-carbon reaction with K2CO3is given, and an explanation to the nonbalanced [H2]/[CO + 2CO2] is presented, which is a phenomenon usually observed in experiment.

Investigation of Using Multi-Hydroxyl Ionic Liquid Polymer as Catalyst to Produce Propylene Carbonate

2021 ◽  
Vol 1020 ◽  
pp. 219-223
Author(s):  
Richard S. Horng ◽  
Wei Cheng Hung ◽  
Ju Wei Kuo
Keyword(s):  
Ionic Liquid ◽  
Propylene Carbonate ◽  
Catalytic Reaction ◽  
Reaction System ◽  
Industrial Process ◽  
Hydroxyl Group ◽  
Hydroxyl Groups ◽  
Efficient Catalyst ◽  
Liquid Polymer ◽  
Ionic Liquid Polymer

Ionic liquid with a single hydroxyl group, 1-(2-hydroxyl-ethyl)-3-methylimidazolium bromide (HEMIMB), was prepared. It was found that HEMIMB could be an efficient catalyst for CO2 cycloaddition to propylene oxide to produce propylene carbonate (PC). An ionic liquid polymer with multi-hydroxyl groups poly(1-2-hydroxyl-ethyl)-3-vinylimidazolium bromide (PHEVIMB) was also prepared. In this study, both catalytic reaction performances of HEMIMB and PHEVIMB were investigated. Results showed that product separation and catalyst recycles in the process of PHEVIMB catalytic reaction system was much more efficient with a yield of 55.5%, even after three consecutive catalyst reuses. Meanwhile, the separation was less time-efficient for homogeneous catalytic system of HEMIMB molecules with a single hydroxyl group despite of a yield of 92.4%. When it comes to practical industrial process design, the single component with multifunctional ionic liquid polymer, as catalyst, may be considered effective and friendly process.

Determination of trace amounts of oxalate in vegetable and water samples using a new kinetic–catalytic reaction system

2009 ◽  
Vol 73 (1) ◽  
pp. 112-116 ◽  
Author(s):  
Mansour Arab Chamjangali ◽  
Laleh Sharif-Razavian ◽  
Mohammad Yousefi ◽  
Amir Hossein Amin
Keyword(s):  
Catalytic Reaction ◽  
Water Samples ◽  
Reaction System

Feedstock recycling of polyethylene in a two-step thermo-catalytic reaction system

2007 ◽  
Vol 79 (1-2) ◽  
pp. 415-423 ◽  
Author(s):  
J. Aguado ◽  
D.P. Serrano ◽  
G. San Miguel ◽  
M.C. Castro ◽  
S. Madrid
Keyword(s):  
Catalytic Reaction ◽  
Reaction System ◽  
Feedstock Recycling

RECURSIVENESS AND EVOLVABILITY IN A MUTUALLY CATALYTIC REACTION SYSTEM

2003 ◽  
Vol 06 (01) ◽  
pp. 79-92
Author(s):  
KUNIHIKO KANEKO
Keyword(s):  
Catalytic Reaction ◽  
Essential Role ◽  
Reaction System ◽  
Reaction Network ◽  
Experimental Demonstration ◽  
Cell State

We discuss how recursive production of a proto-cell consisting of a mutually catalytic reaction network is possible. It is shown that a minority molecule species plays an essential role in carrying heredity, in the sense that the molecule is preserved well and controls replication of the cell. The cell state controlled by such a minority molecule is shown to have evolvability. Successive switches over quasi-recursive states are found, caused by extinction of minority molecules. Experimental demonstration of the theory is also discussed.

Hydrogen generation from glucose catalyzed by organoruthenium catalysts under mild conditions

2017 ◽  
Vol 53 (30) ◽  
pp. 4230-4233 ◽  
Author(s):  
Yulu Zhan ◽  
Yangbin Shen ◽  
Shuping Li ◽  
Baohua Yue ◽  
Xiaochun Zhou
Keyword(s):  
Catalytic Reaction ◽  
Hydrogen Generation ◽  
Reaction System ◽  
Homogeneous Catalyst ◽  
Mild Conditions

Here, we describe a catalytic reaction system where H2 can be produced from glucose using a homogeneous catalyst.

The numerical method for the optimal supporting position and related optimal control for the catalytic reaction system

2017 ◽  
Vol 20 (4) ◽  
pp. 2891-2903
Author(s):  
Qiyu Liu ◽  
Qunxiong Zhu ◽  
Xin Yu ◽  
Zhiqiang Geng ◽  
Longjin Lv
Keyword(s):  
Optimal Control ◽  
Numerical Method ◽  
Catalytic Reaction ◽  
Reaction System
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