Now showing items 41-50 of 318
Studies of the in vitro and in vivo effects of conjugated steroids and carboxylic acids on hepatic tyrosine transaminase in the rat
(Elsevier, 1967-11-14)
1. 1. Tyrosine transaminase (-tyrosine:2-oxoglutarate aminotransferase, EC 2.6.1.5) activity was lost rapidly in fresh rat-liver homogenates (pH 6.9), that were incubated at 38[deg]. The inactivation was paralled by the ...
Radiochemical separation of strontium by amalgam exchange
(Elsevier, 1963-07)
The radiochemical separation of strontium by an amalgam-exchange technique has been critically evaluated with a saturated aqueous solution of potassium chloride as an exchange medium. With an optimised procedure strontium ...
Modulation of the intrinsic viscosity of hyaluronic acid formed by human "fibroblasts" in vitro: The effects of hydrocortisone and colchicine
(Elsevier, 1964-07-07)
Data are presented to show that the intrinsic viscosity of hyaluronic acid elaborated into the culture medium supportinf human connective-tissue cells in vitro is modulated in a systematic manner by the cells. Intrinsic ...
Formation of Dg-1-amino-2-propanol by a highly purified enzyme from Escherichia coli
(Elsevier, 1968-05-14)
An alkaline phosphomonoesterase from Neurospora crassa
(Elsevier, 1961-11-25)
An alkaline phosphomonoesterase was purified 40-fold from mycelium of Neurospora crassa. The enzyme had a pH maximum of 8.9-9.0 with [beta]-glucerol phosphate as substrate and exhibited maximal activity in the presnece of ...
Zonal density gradient electrophoresis of intracellular membranes of brain cortex
(Elsevier, 1969-03-11)
Rat cerebral cortex was homogenized in a sucrose-free medium and a number of intracellular membrane fractions were isolated therefrom by means of differential and density-gradient centrifugation. The mitochondrial and ...
Formation of dehydroepiandrosterone sulphate by previable human foetuser
(Elsevier, 1967-06-06)
Characterization of a mutant human erythrocyte carbonic anhydrase: Carbonic anhydrase IcGuam: The amino acid substitution and carboxylesterase and hydratase activities
(Elsevier, 1966-11)
Evidence is presented which indicates that an arginine residue has substituted for a glycine residue in the abnormal human erythrocyte carbonic anhydrase, CA IcGuam. The ratio of the amount of mutant to normal enzyme ...
Studies on the synthesis and structure of cordycepin monophosphate
(Elsevier, 1963)
Cordycepin monophosphate has been synthesized by two methods. One of these was chemical and involved treatment of cordycepin with cyanoethyl phosphate in the presence of N,N'-dicyclohexylcarbodiimide with subsequent alkaline ...