scholarly journals Experimental determination of the kinetics of formation of the benzene-ethane co-crystal and implications for Titan

2014 ◽  
Vol 41 (15) ◽  
pp. 5396-5401 ◽  
Author(s):  
Morgan L. Cable ◽  
Tuan H. Vu ◽  
Robert Hodyss ◽  
Mathieu Choukroun ◽  
Michael J. Malaska ◽  
...  
Keyword(s):  
Experimental Determination ◽  
Kinetics Of Formation ◽  
Kinetics Of

Experimental determination of the hole capture kinetics of H4F deep trap in electron-irradiated highly dopedp-type InP

2004 ◽  
Vol 96 (2) ◽  
pp. 1032-1035 ◽  
Author(s):  
R. Darwich ◽  
B. Massarani
Keyword(s):  
Experimental Determination ◽  
Deep Trap ◽  
Hole Capture ◽  
Kinetics Of

Experimental Determination of the Kinetics of Calcium-Binding With Chondroitin Sulphate and the Effects of Uric Acid on This Process

1987 ◽  
Vol 138 (4 Part 1) ◽  
pp. 927-927
Author(s):  
A. Hesse ◽  
H. Wurzel ◽  
G. Krampitz ◽  
W. Vahlensieck
Keyword(s):  
Uric Acid ◽  
Experimental Determination ◽  
Calcium Binding ◽  
Chondroitin Sulphate ◽  
Kinetics Of

scholarly journals Examination of steam gasification of coal with physically mixed catalysts

2019 ◽  
Vol 21 (4) ◽  
pp. 51-57 ◽  
Author(s):  
Katarzyna Śpiewak ◽  
Grzegorz Czerski ◽  
Agnieszka Sopata
Keyword(s):  
Coal Gasification ◽  
Steam Gasification ◽  
Conversion Degree ◽  
Process Time ◽  
Gasification Process ◽  
Kinetics Of Formation ◽  
Short Time ◽  
Kinetics Of ◽  
Positive Effect

Abstract The aim of this study was to analyse the steam gasification process of ‘Janina’ coal with and without Na-, K- and Ca-catalysts. The catalysts were physically mixed with the coal due to the simplicity of this method, short time of execution and certainty that the amount of catalyst is exactly as the adopted one. The isothermal measurements were performed at 800, 900 and 950°C and a pressure of 1 MPa using thermovolumetric method. The obtained results enabled assessment of the effect of analysed catalysts on the process at various temperatures by determination of: i) carbon conversion degree; ii) yield and composition of the resulting gas; and iii) kinetics of formation reactions of main gas components – CO and H2. The addition of catalysts, as well as an increase in operating temperature, had a positive effect on the coal gasification process – reactions rates increased, and the process time was reduced.

Microanalytical determination of calcium, phosphate, and arsenate including kinetics of formation of molybdenum blue from reduction of molybdoarsenic acid by ferrous ammonium sulphate

1987 ◽  
Vol 65 (6) ◽  
pp. 1313-1315 ◽  
Author(s):  
U. S. Rat ◽  
T. S. B. Narasaraju
Keyword(s):  
Calcium Phosphate ◽  
Ammonium Sulphate ◽  
Ferrous Ammonium Sulphate ◽  
Molybdenum Blue ◽  
Spectrophotometric Methods ◽  
Rate Determining Step ◽  
Kinetics Of Formation ◽  
Ferrous Ammonium ◽  
Kinetics Of

A method for the microdetermination of calcium, phosphate, and arsenate in mixtures of the three has been developed. In an aliquot of the mixture calcium was determined complexometrically using EDTA. Phosphate and arsenate were determined in second and third aliquots, respectively, using spectrophotometric methods. The interference of arsenate in the determination of phosphate was avoided by masking arsenate with thiosulphate. The kinetics of formation of molybdenum blue from molybdoarsenic acid by reduction with ferrous ammonium sulphate was also studied. The rate-determining step was found to be the reduction of molybdoarsenic acid with iron(II); the reaction was first order in iron(II) and arsenate over the concentration ranges studied. Values found for the enthalpy, entropy, and free energy of activation were 22, 0.05, and 7.5 kcal, respectively.

scholarly journals Use of nitro blue tetrazolium in the reaction of adrenaline autooxidation for the determination of superoxide dismutase activity

2013 ◽  
Vol 59 (4) ◽  
pp. 399-410 ◽  
Author(s):  
T.V. Sirota
Keyword(s):  
Superoxide Dismutase ◽  
Antioxidant Properties ◽  
Nitro Blue Tetrazolium ◽  
Anion Formation ◽  
Carbonate Buffer ◽  
Blue Tetrazolium ◽  
Novel Approach ◽  
Kinetics Of Formation ◽  
Kinetics Of

Addition of nitro blue tetrazolium (NBT) into the reaction of adrenaline autooxidation allows to identify directly superoxide anion formation (О · ) in this superoxide-generating system. The kinetics of formation of adrenochrome and О · were compared under the same conditions. Three possible approaches to the use the adrenaline autooxidation reaction for determining the activity of superoxide dismutase (SOD) and revealing the antioxidant properties of various compounds are discussed. Two of these approaches have been described previously: the spectrophotometric method of the registration of adrenochrome, the final product of adrenaline autoxidation, at 347 nm (Sirota, 1999) and the polarographic method, based on determination of oxygen consumption for О · formation (Sirota, 2011). Here, a novel approach to this problem is presented; it consists in the spectrophotometric determination of О · using NBT. The application of this approach enables one to lower the pH of carbonate buffer from 10.5 to 9.7 and to decrease (4-fold) the amount of added adrenaline, i.e., to generate milder and more effective conditions for revealing and studying the antioxidant properties of examined materials.

scholarly journals Kinetics of Formation and Crystal Structure Determination of Sr4Al6O12SO4

2017 ◽  
Vol 19 (suppl 1) ◽  
pp. 125-132 ◽  
Author(s):  
José Amparo Rodríguez ◽  
Estrella Guadalupe Ríos Rodríguez ◽  
Enrique Rocha Rangel ◽  
José Manuel Almanza Robles ◽  
Jesús Torres ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Structure Determination ◽  
Crystal Structure Determination ◽  
Kinetics Of Formation ◽  
Kinetics Of

scholarly journals Experimental Determination of the Kinetics of Glauconite Dissolution and Carbonation

2021 ◽  
Author(s):  
Qin Zhang ◽  
Benjamin Tutolo
Keyword(s):  
Experimental Determination ◽  
Kinetics Of
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