Effects of Toluene and Benzoic Acid on the Kinetics of Ferrous Oxidation on Pt and Nafion‐Coated Pt Electrodes

1994 ◽  
Vol 141 (6) ◽  
pp. 1483-1492 ◽  
Author(s):  
Jian‐Hui Ye ◽  
Peter S. Fedkiw
Keyword(s):  
Benzoic Acid ◽  
Pt Electrodes ◽  
Kinetics Of ◽  
Ferrous Oxidation

Submerged upflow biotower operation and computer simulation

1994 ◽  
Vol 30 (11) ◽  
pp. 143-146
Author(s):  
Ronald D. Neufeld ◽  
Christopher A. Badali ◽  
Dennis Powers ◽  
Christopher Carson
Keyword(s):  
Computer Simulation ◽  
Benzoic Acid ◽  
Computer Model ◽  
Rate Constants ◽  
Batch Mode ◽  
Operational Conditions ◽  
First Order ◽  
Low Concentrations ◽  
Biological Transformation ◽  
Kinetics Of

A two step operation is proposed for the biodegradation of low concentrations (< 10 mg/L) of BETX substances in an up flow submerged biotower configuration. Step 1 involves growth of a lush biofilm using benzoic acid in a batch mode. Step 2 involves a longer term biological transformation of BETX. Kinetics of biotransformations are modeled using first order assumptions, with rate constants being a function of benzoic acid dosages used in Step 1. A calibrated computer model is developed and presented to predict the degree of transformation and biomass level throughout the tower under a variety of inlet and design operational conditions.

Resorption and elimination kinetics of benzoic acid during chemical necrectomy in deep burns

2009 ◽  
Vol 69 (8) ◽  
pp. 827-830
Author(s):  
Milan Dastych ◽  
Zuzana Jelínková ◽  
Alena Mikušková ◽  
Pavel Brychta ◽  
Miroslava Beňovská
Keyword(s):  
Benzoic Acid ◽  
Elimination Kinetics ◽  
Kinetics Of

scholarly journals DETECTION OF HYDROPEROXIDES IN SOLUTIONS OF PHOTOOXIDIZED PSORALEN

2019 ◽  
Vol 14 (1) ◽  
pp. 32-38
Author(s):  
V. V. Skarga ◽  
E. V. Nevezhin ◽  
A. А. Matrosov ◽  
V. V. Negrebetsky ◽  
M. V. Malakhov
Keyword(s):  
Quantitative Analysis ◽  
Phosphate Buffer ◽  
Biological Effects ◽  
Xylenol Orange ◽  
Phosphate Buffer Solution ◽  
Buffer Solution ◽  
Uva Irradiation ◽  
Fox Assay ◽  
Kinetics Of ◽  
Ferrous Oxidation

Photooxidized psoralen solutions possess a variety of biological effects, which implementation mechanism may presumably involve hydroperoxides. Here, the hydroperoxide content in photooxidized psoralen solutions was assessed using photometric FOX assay (from Ferrous Oxidation + Xylenol Orange). FOX reagent with 10× content of Xylenol Orange, modified for quantitative analysis of up to 50 μM of hydroperoxides in aqueous phase was used in experiments. During photooxidation of 0.1 mM psoralen in phosphate buffer solution, hydroperoxide production increases with dose of UVA irradiation (~2.5 μM eq. of H2O2 for dose of 252 kJ/m2 and ~11 μM eq. of H2O2 for dose of 1512 kJ/m2) and reaches ~16.5 μM eq. of H2O2 at the highest dose investigated (3024 kJ/m2). A comparison of kinetics of psoralen photolysis and hydroperoxide generation allows us to suggest that generation of hydroperoxide results from the secondary photochemical processes involving psoralen photoproducts, presumably from photoinduced autooxidation of aldehydic photoproducts of psoralen.

scholarly journals Structure–property Effects in the Generation of Transient Aqueous Benzoic Acid Anhydrides by Carbodiimide Fuels

2019 ◽  
Author(s):  
Lasith Kariyawasam ◽  
Julie Kron ◽  
Run Jiang ◽  
André Sommer ◽  
Scott Hartley
Keyword(s):  
Benzoic Acid ◽  
Atp Hydrolysis ◽  
Dissipative Systems ◽  
Nonequilibrium Systems ◽  
Structure Property ◽  
Ethylcarbodiimide Hydrochloride ◽  
Kinetics Of Formation ◽  
Coupled Reactions ◽  
Acid Anhydrides ◽  
Kinetics Of

<div>The design of dissipative systems, which operate out-of-equilibrium by consuming chemical fuels, is challenging. As yet, there are few examples of privileged fuel chemistries that can be broadly applied in abiotic systems in the same way that ATP hydrolysis is exploited throughout biochemistry. The key issue is that designing nonequilibrium systems is inherently about balancing the relative rates of coupled reactions. The use of carbodiimides as fuels to generate transient aqueous carboxylic anhydrides has recently been used in examples of new nonequilibrium materials and supramolecular assemblies. Here, we explore the kinetics of formation and decomposition of a series of benzoic anhydrides generated from the corresponding acids and EDC under typical conditions (EDC = <i>N</i>-(3-dimethylaminopropyl)-<i>N</i>′-ethylcarbodiimide hydrochloride). The reactions can be described by a simple mechanism that merges known behavior for the two processes independently. Structure–property effects in these systems are dominated by differences in anhydride decomposition rate. The kinetic parameters allow trends in concentration-dependent properties to be simulated, such as reaction lifetimes, peak anhydride concentrations, and yields. For key properties there are diminishing returns with the addition of increasing amounts of fuel. These results should provide useful guidelines for the design of functional systems making use of this chemistry. <br></div>

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