Potentiometric titrations and oxidation-reduction potentials of several iron superoxide dismutases

Biochemistry ◽  
1983 ◽  
Vol 22 (3) ◽  
pp. 624-627 ◽  
Author(s):  
William C. Barrette ◽  
Donald T. Sawyer ◽  
James A. Fee ◽  
Kozi Asada
Keyword(s):  
Superoxide Dismutases ◽  
Potentiometric Titrations ◽  
Reduction Potentials ◽  
Oxidation Reduction

scholarly journals Measurement of the oxidation-reduction potentials for one-electron and two-electron reduction of electron-transfer flavoprotein from pig liver

1984 ◽  
Vol 219 (3) ◽  
pp. 1043-1047 ◽  
Author(s):  
M Husain ◽  
M T Stankovich ◽  
B G Fox
Keyword(s):  
Electron Transfer ◽  
Pig Liver ◽  
Electron Transfer Flavoprotein ◽  
Midpoint Potential ◽  
Potentiometric Titrations ◽  
Reduction Potentials ◽  
Oxidation Reduction ◽  
Electron Reduction ◽  
Reducing Equivalents

Potentiometric titrations of pig liver electron-transfer flavoprotein (ETF) were performed at pH 7.5 and 4 degrees C, both in the reductive and oxidative directions. Reduction of ETF to the hydroquinone form required a total of two reducing equivalents/mol of ETF with the formation of sub-stoichiometric amounts of anionic semiquinone as an intermediate. The oxidation-reduction potentials for the two one-electron couples, oxidized ETF/ETF semiquinone and ETF semiquinone/fully reduced ETF, are +4 mV and -50 mV respectively. The overall midpoint potential for the two-electron couple (oxidized ETF/fully reduced ETF) is -23 mV.

scholarly journals Studies on the Oxidation-Reduction Potentials of Heme Proteins

1965 ◽  
Vol 240 (8) ◽  
pp. 3317-3324
Author(s):  
Maurizio Brunori ◽  
Jeffries Wyman ◽  
Eraldo Antonini ◽  
Alessandro Rossi-Fanelli
Keyword(s):  
Heme Proteins ◽  
Reduction Potentials ◽  
Oxidation Reduction

scholarly journals SULFHYDRYL OXIDATION-REDUCTION POTENTIALS DERIVED FROM THERMAL DATA

1937 ◽  
Vol 117 (1) ◽  
pp. 281-308
Author(s):  
Henry Borsook ◽  
Emory L. Ellis ◽  
Hugh M. Huffman
Keyword(s):  
Reduction Potentials ◽  
Oxidation Reduction ◽  
Thermal Data ◽  
Sulfhydryl Oxidation

scholarly journals OXIDATION-REDUCTION POTENTIALS OF THE METHEMOGLOBIN-HEMOGLOBIN SYSTEM

1939 ◽  
Vol 131 (2) ◽  
pp. 649-662 ◽  
Author(s):  
John Fuller Taylor ◽  
A. Baird Hastings
Keyword(s):  
Reduction Potentials ◽  
Oxidation Reduction

scholarly journals Microbial Removal of Pb(II) Using an Upflow Anaerobic Sludge Blanket (UASB) Reactor

Catalysts ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 512
Author(s):  
Jeremiah Chimhundi ◽  
Carla Hörstmann ◽  
Evans M. N. Chirwa ◽  
Hendrik G. Brink
Keyword(s):  
Treatment Process ◽  
Removal Rate ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Anaerobic Sludge ◽  
Reduction Potentials ◽  
Oxidation Reduction ◽  
Anaerobic Sludge Blanket ◽  
Microbial Removal ◽  
Maximum Removal

The main objective of this study was to achieve the continuous biorecovery and bioreduction of Pb(II) using an industrially obtained consortia as a biocatalyst. An upflow anaerobic sludge blanket reactor was used in the treatment process. The bioremediation technique that was applied made use of a yeast extract as the microbial substrate and Pb(NO3)2 as the source of Pb(II). The UASB reactor exhibited removal efficiencies of between 90 and 100% for the inlet Pb concentrations from 80 to 2000 ppm and a maximum removal rate of 1948.4 mg/(L·d) was measured. XRD and XPS analyses of the precipitate revealed the presence of Pb0, PbO, PbS and PbSO4. Supporting experimental work carried out included growth measurements, pH, oxidation–reduction potentials and nitrate levels.

Sign in / Sign up

Export Citation Format

Share Document