Temperature oscillations in bromate-gallic acid system: A calorimetric study

1995 ◽  
Vol 27 (6) ◽  
pp. 561-568 ◽  
Author(s):  
Kallol Mukherjee ◽  
S. P. Moulik ◽  
D. C. Mukherjee
Keyword(s):  
Gallic Acid ◽  
Calorimetric Study ◽  
Acid System ◽  
System A ◽  
Temperature Oscillations

scholarly journals Nature of Catalytically Active Sites in the Supported WO3/ZrO2 Solid Acid System: A Current Perspective

ACS Catalysis ◽  
2017 ◽  
Vol 7 (3) ◽  
pp. 2181-2198 ◽  
Author(s):  
Wu Zhou ◽  
Nikolaos Soultanidis ◽  
Hui Xu ◽  
Michael S. Wong ◽  
Matthew Neurock ◽  
...  
Keyword(s):  
Active Sites ◽  
Solid Acid ◽  
Acid System ◽  
System A ◽  
Current Perspective ◽  
Catalytically Active ◽  
A Current

Thermal oscillations in the bromate – oxalic acid – MnSO4 – H2SO4 – acetone system: A calorimetric study

2002 ◽  
Vol 80 (9) ◽  
pp. 1204-1209
Author(s):  
Sudeshna Biswas ◽  
Kallol Mukherjee ◽  
Dulal Chandra Mukherjee ◽  
Satya Priya Moulik
Keyword(s):  
Oxalic Acid ◽  
Enthalpy Change ◽  
Potassium Bromate ◽  
Calorimetric Study ◽  
Oscillatory Reaction ◽  
System A ◽  
Retarding Effect ◽  
Thermal Oscillations ◽  
Belousov Zhabotinsky Reaction ◽  
Acetone System

The oscillatory reaction of potassium bromate, oxalic acid, and MnSO4 in the presence of acetone in aq H2SO4 solutions has been studied calorimetrically at different concentrations of substrates. Acetone and oxalic acid have been found to accelerate the reaction by increasing the oscillation frequency. On the other hand, MnSO4 has a retarding effect; the frequency of oscillation decreases systematically with increasing concentration of MnSO4. Potassium bromate shows mixed behavior in this respect. The total heat evolved during the reaction per mol of oxalic acid consumed has been evaluated, which can be used to calculate the concentrations of the various reactants at different stages of the reaction. The effects of different electrolytes (KCl, NaCl, BaCl2, CaCl2, SrCl2, NaBr, NaI, KNO3, NaNO3, and Ca(NO3)2) and solvents (dimethylformamide, 1,4-dioxane, acetonitrile, and tetrahydrofuran) on the extents of oscillation and the enthalpy change for the process have been also examined.Key words: Belousov–Zhabotinsky reaction, oscillatory reaction, oxalic acid, calorimetry, acetone.

scholarly journals Complexation parameters for the actinides(IV)-humic acid system: a search for consistency and application to laboratory and field observations

2008 ◽  
Vol 96 (6) ◽  
Author(s):  
Pascal E. Reiller ◽  
Nick D. M. Evans ◽  
Gyula Szabó
Keyword(s):  
Original Data ◽  
Formation Constants ◽  
Field Observations ◽  
Independent Data ◽  
Acid System ◽  
Hydrolysis Constant ◽  
Independent Laboratory ◽  
System A ◽  
Hydrolysis Of ◽  
Full Analogy

SummaryThe coherence of actinide(IV) complexation by humic substances (HS) is reviewed and new data are proposed. In a first attempt, the values of independent data from literature on Th(IV), U(IV), and Pu(IV) are collected, selected, and compiled. The data obtained follow the “classical” trend of increasing conditional formation “constants” with pH, led both by the increasing ionisation of HS and by the extensive hydrolysis of the tetravalent actinides. Even though a fair agreement is evident, the experimental uncertainties do not permit a full analogy between the actinides(IV) to be ascertained. In a second attempt, the experiments from which the original data are available were reinterpreted using only one hydrolysis constant set for U(IV) as an example, considering that all actinides(IV) have analogous humic complexation behaviour. Hence, the obtained evolution of conditional formation “constants” is much more coherent and the uncertainties do not permit to distinguish an actinide(IV) from one another. The obtained data are then applied to independent laboratory and

scholarly journals A calorimetric study of the Ni(II)-5'AMP system. A base-stacking stabilization

1991 ◽  
Vol 202 (2) ◽  
pp. 401-404 ◽  
Author(s):  
Luis A. HERRERO ◽  
Antonia M. CALAFAT ◽  
Angel TERRON
Keyword(s):  
Calorimetric Study ◽  
Base Stacking ◽  
Amp System ◽  
System A

Copper-promoted cementation of antimony in hydrochloric acid system: A green protocol

2015 ◽  
Vol 299 ◽  
pp. 520-528 ◽  
Author(s):  
Lian-Kui Wu ◽  
Ying-Ying Li ◽  
Hua-Zhen Cao ◽  
Guo-Qu Zheng
Keyword(s):  
Hydrochloric Acid ◽  
Acid System ◽  
Green Protocol ◽  
System A

Regulating the fluorescence intensity of an anthracene boronic acid system: a B–N bond or a hydrolysis mechanism?

2004 ◽  
Vol 32 (6) ◽  
pp. 571-581 ◽  
Author(s):  
Weijuan Ni ◽  
Gurpreet Kaur ◽  
Greg Springsteen ◽  
Binghe Wang ◽  
Stefan Franzen
Keyword(s):  
Fluorescence Intensity ◽  
Boronic Acid ◽  
Acid System ◽  
Hydrolysis Mechanism ◽  
System A
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