scholarly journals Further studies on the ceric sulphate-arsenious acid reaction for the detection of various analogues of thyroxine

1964 ◽  
Vol 90 (1) ◽  
pp. 214-219 ◽  
Author(s):  
SB Barker
Keyword(s):  
Arsenious Acid ◽  
Acid Reaction ◽  
Ceric Sulphate

Ceric Sulfate-Arsenious Acid Reaction in Microdetermination of Iodine

1951 ◽  
Vol 23 (10) ◽  
pp. 1507-1510 ◽  
Author(s):  
Allen Lein ◽  
Neena Schwartz
Keyword(s):  
Ceric Sulfate ◽  
Arsenious Acid ◽  
Acid Reaction

A Simple Method for Estimation of Lipoxygenase and Cyclo-Oxygenase Pathways in Human Platelets - the Use of Thiobarbituric Acid Reaction

1980 ◽  
Vol 44 (02) ◽  
pp. 111-114 ◽  
Author(s):  
Hiroshi Takayama ◽  
Minoru Okuma ◽  
Haruto Uchino
Keyword(s):  
Time Course ◽  
Normal Values ◽  
Human Platelet ◽  
Thiobarbituric Acid ◽  
Human Platelets ◽  
Optimal Conditions ◽  
Experimental Conditions ◽  
Simple Method ◽  
Acid Reaction ◽  
Optimal Ph

SummaryTo develop a simple method for estimation of platelet lipoxygenase (PLO) and cyclo-oxygenase (PCO) pathways, the arachidonic acid (AA) metabolism of human platelet was investigated under various experimental conditions by the use of the thiobarbituric acid (TBA) reaction and a radioisotope technique. A TBA-reactive substance different from malondialdehyde (MDA) via PCO pathway was detected and shown to be derived from the PLO pathway. Since the optimal pH and time course of its formation were different from those of MDA formation via PCO pathway, PLO and PCO pathways were estimated by quantitating the TBA-reactive substances produced by the incubation of AA either with aspirin-treated platelets or with untreated ones, respectively, each under optimal conditions. Normal values expressed in terms of nmol MDA/108 platelets were 1.17±0.34 (M±SD, n = 31) and 0.79±0.15 (n = 31) for PLO and PCO pathways, respectively.

Etude de l'influence de l'ionicité du milieu réactionnel sur les propriétés texturales de gels d'oxyde de titane

1974 ◽  
Vol 52 (13) ◽  
pp. 2502-2512 ◽  
Author(s):  
Henry Brusset ◽  
Henri-Georges Mendelbaum ◽  
Chantal Flicoteaux
Keyword(s):  
Reaction Medium ◽  
Textural Properties ◽  
Low Dielectric Constant ◽  
Hydrogen Ions ◽  
Aqueous Acid ◽  
Low Dielectric ◽  
Ionic Dissociation ◽  
Two Factors ◽  
Free Hydrogen ◽  
Acid Reaction

A systematic study has been made of the influence of two factors on the synthesis of titanium dioxide gels: (i) the acidity of the reaction medium and (ii) the presence of a solvent. This study demonstrates that, in an aqueous acid medium, the development of textural properties is related to the concentration of free hydrogen ions. The presence in an acid reaction medium of a solvent, such as butanol or benzene, of low dielectric constant, inhibits the development of the structural properties by lowering the ionic dissociation of the acid. Our results provide an explanation for the apparently divergent measurements in the literature.

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