Now showing items 11-20 of 40
Solution and bulk properties of branched polyvinyl acetates : Part I: Non-Newtonian viscosity behaviour
(Elsevier, 1963)
A series of linear and branched fractions of polyvinyl acetate of relatively narrow molecular weight distribution was prepared and characterized by solution viscosity, hydrolysis, and light scattering measurements. At a ...
Hydrocarbon oxidation by a bacterial enzyme system : I. Products of octane oxidation
(Elsevier, 1963)
A Pseudomonad which grows on hexane as sole carbon source was isolated from soil by enrichment-culture technique. Cell-free, soluble enzyme preparations of the organism catalyze the oxidation of 14C-labeled octane to ...
The enzymic synthesis of the sulfate esters of estradiol-17[beta] and diethylstilbesterol
(Elsevier, 1963)
The present study demonstrates the formation of three sulfate esters of estradiol and three of diethylstilbesterol by a microsome-free extract of rat liver.The sulfate esters were separated by paper chromatography using a ...
Determination of small amounts of zirconium--I: gravimetric procedures using mandelic acid and its derivatives
(Elsevier, 1963-06)
The limiting factors have been investigated for precipitation of zirconium at the milligram level by mandelic acid, p-bromomandelic acid and m-nitromandelic acid; the latter has only been briefly studied previously. Optimum ...
Starch-gel electrophoresis of citrate-condensing enzyme from pig heart
(Elsevier, 1963)
Citrate-condensing enzyme from pig heart can exist in vitro as two distinct species which are separable by starch-gel electrophoresis. Several mild types of treatment can interconvert these enzymes and suggest that the ...
Stereospecificity of the transport of tert.-leucine
(Elsevier, 1963-10-08)
1. 1. Carboxyl-labeled ter.-leucine (pseudoleucine) has been synthesized by the reaction of pivaldehyde with K14CN, and the stereoisomers separated.2. 2. About 3% of the radioactive carbon injected into the rat in the form ...
Spectrophotometric studies of lower oxidation states of technetium
(Elsevier, 1963-11)
The spectrophotometric behaviour of lower oxidation states oftechnetium, obtained by reducing pertechnetate under different conditions by various methods, has been examined. Contrary to some of the previously advanced ...
Inhibition of protein synthesis in cell-free systems by homocitrullylamino adenosine
(Elsevier, 1963)
Homocitrullylamino adenosine inhibits the incorporation of [14C]amino acids into a hot acid-insoluble form in cell-free systems derived from Escherichia coli and rat liver. The concentration necessary for one-half maximal ...
Rapid activation analysis of trace vanadium in tissue using 3.8-minute vanadium-52
(Elsevier, 1963)
Submicrogram amounts of vanadium in rat liver tissue have been analyzed by rapid activation analysis. A 5-min radiochemical separation coupled with [gamma]-ray spectrometry permitted utilization of the 3.8-min vanadium-52 ...