Now showing items 31-40 of 233
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)
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 ...
The action of trypsin and neuraminidase on the synaptic membranes of brain cortex
(Elsevier, 1969-03-11)
The population of intracellular membranes of rat cerebral cortex which exhibited the highest relative specific concentration of bound N-acetylneuraminic acid (NANA) and the highest relative specific activity of ...
Thermal neutron-activation analysis of titanium using 5[middle dot]8-minute titanium-51 and rapid radiochemical separations
(Elsevier, 1963-01)
A nuclear reactor has been used to determine trace amounts of titanium by neutron-activation analysis in a variety of samples. A 10-min radiochemical separation procedure coupled with gamma-ray spectrometry permitted ...