Oxidation—Reduction. I. The Kinetics of the Reduction of Iodine by Titanous Ion

1951 ◽  
Vol 73 (6) ◽  
pp. 2601-2605 ◽  
Author(s):  
Carl E. Johnson ◽  
S. Winstein
Keyword(s):  
Oxidation Reduction ◽  
Kinetics Of

Kinetics and mechanism of oxidation of DL-α-alanine by permanganate ion in acid perchlorate media

1991 ◽  
Vol 69 (12) ◽  
pp. 2018-2023 ◽  
Author(s):  
Refat M. Hassan
Keyword(s):  
Amino Acids ◽  
Ionic Strength ◽  
Acid Solution ◽  
Second Order ◽  
Perchloric Acid Solution ◽  
Oxidation Reduction ◽  
Initial Stage ◽  
Aqueous Perchloric Acid ◽  
Mechanism Of Oxidation ◽  
Kinetics Of

The kinetics of permanganate oxidation of DL-α-alanine in aqueous perchloric acid solution at a constant ionic strength of 2.0 mol dm−3 has been investigated spectrophotometrically. The reaction was found to show second-order kinetics overall with respect to each of the reactants in the slow initial stage; the second-order kinetics are not, however, maintained throughout the relatively fast final stage of reaction. The added salts lead to the prediction that Mn(III) and (or) Mn(IV) play a very important role in the reaction kinetics. A tentative mechanism consistent with the kinetics is discussed. Key words: kinetics, oxidation, reduction, amino acids, permanganate.

scholarly journals Kinetics of iron oxidation-reduction in hydrous silicic melts

2002 ◽  
Vol 87 (7) ◽  
pp. 829-837 ◽  
Author(s):  
Fabrice Gaillard ◽  
Bruno Scaillet ◽  
Michel Pichavant
Keyword(s):  
Iron Oxidation ◽  
Oxidation Reduction ◽  
Kinetics Of

The Effects of Bicarbonate Depletion and Formate Incubation on the Kinetics of Oxidation-Reduction Reactions of the Photosystem II Quinone Acceptor Complex

1984 ◽  
Vol 39 (5) ◽  
pp. 382-385 ◽  
Author(s):  
Howard H. Robinson ◽  
Julian J. Eaton-Rye ◽  
Jack J. S. van Rensen ◽  
Keyword(s):  
Photosystem Ii ◽  
Redox State ◽  
Oxygen Electrode ◽  
Thylakoid Membranes ◽  
Acceptor Site ◽  
Kinetics Of Oxidation ◽  
Oxidation Reduction ◽  
Primary Quinone Acceptor ◽  
Quinone Acceptor ◽  
Kinetics Of

Chloroplast thylakoid membranes depleted of bicarbonate exhibit a slowed oxidation of the primary quinone acceptor (Qᴀ) by the secondary quinone acceptor (Qв) of photosystem II. The kinetics of these slowed reactions have been followed by using short xenon flashes of light both to excite photosystem II and to probe the redox state of Qᴀ. Thylakoids incubated with formate but not depleted of bicarbonate showed the same pattern of slowed reaction kinetics of the quinone acceptors as seen in bicarbonate-depleted| thylakoids. This led us to conclude that there was a simple competition between bicarbonate and formate at this site; however, steady-state electron transfer measured with an oxygen electrode showed that although the bicarbonate- depleted thylakoids were indeed inhibited, rates in the formate-incubated thylakoids were only slightly slowed. We suggest that the inhibition seen at the quinone acceptor site of photosystem II depends in a subtle way upon the rate of exchange of bicarbonate and formate at this site.

Concerning the form of biochemically active vanadium

1981 ◽  
Vol 212 (1186) ◽  
pp. 65-84 ◽  
Keyword(s):  
Transmembrane Potential ◽  
Tridentate Ligands ◽  
Vanadium Concentration ◽  
Hydrated Form ◽  
Reduction Processes ◽  
Reduction Potentials ◽  
Oxidation Reduction ◽  
Descriptive Chemistry ◽  
Kinetics Of ◽  
Vanadium Ions

A survey has been made of the descriptive chemistry of vanadium as it pertains to physiological environments. Taking into account the vanadium concentration, pH, coordinating ligands and chelates, presence of other cations, oxidation-reduction potentials and the kinetics of the various vanadium-containing species, the following suggestions are made. Free vanadium ions will be monomeric. Monomeric vanadium(V) and vanadium(IV) will each exist in a specific hydrated form. Extracellular vanadium will be in the vanadate, V v , form. Intracellular vanadium will most likely be predominately in the vanadyl, V IV , form. Both extracellular vanadium(V) and intracellular vanadium(IV) will be bound to bi- or tridentate ligands if at all. If oxidation-reduction processes involving vanadium are fast relative to transmembrane transport, the transmembrane potential will not be coupled to the V V / V IV Nernstian potential.

The kinetics of some oxidation-reduction reactions involving silver(II)

1967 ◽  
Vol 6 (4) ◽  
pp. 838-840 ◽  
Author(s):  
Daniel H. Huchital ◽  
Norman Sutin ◽  
Bjorn Warnqvist
Keyword(s):  
Reduction Reactions ◽  
Oxidation Reduction ◽  
Kinetics Of
Sign in / Sign up

Export Citation Format

Share Document