Now showing items 41-50 of 274
Formation of dehydroepiandrosterone sulphate by previable human foetuser
(Elsevier, 1967-06-06)
Selected-area small-angle electron diffraction
(Kluwer Academic Publishers; Chapman and Hall ; Springer Science+Business Media, 1967-09)
Selected-area electron diffraction capable of resolving spacings up to 2000 Å from first-order discrete reflections has been achieved using a standard, double-condenser electron microscope. The technique allows photographing ...
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 ...
Determination of rhodium by thermal neutron activation analysis using g-ray spectrometry
(Elsevier, 1962)
Trace amounts of rhodium have been determined by thermal neutron activation analysis using both destructive and non-destructive methods. With a neutron flux of 1012 n cm-2 sec-1 the lower limits of detection are about 0.1 ...
Carbamyl phosphate synthesis in Nuerospora crassa I. Preliminary characterization of arginine-specific carbamyl phosphokinase
(Elsevier, 1965-08-24)
An enzyme from Neurospora crassa which catalyzes carbamyl phosphate formation is reported. Carbamyl phosphate formation by the enzyme is hown to be dependent upon ATP, ammonia, bicarbonate, and magnesium ions. Glutamine ...
The steady-state relaxation time and the product at equilibrium
(Elsevier, 1967-07-11)
1. 1. According to and his co-workers, the steady-state relaxation time (i.e. the reciprocal of the first-order process by which an enzyme reaction reaches equilibrium) determines, in part, the apparent metabolic flow ...
Thermodynamic properties of Uranium-Bismuth alloys
(Elsevier, 1961-03)
Thermodynamic properties of uranium-bismuth alloys were determined by measuring the vapor pressure of bismuth in equilibrium with the condensed phase. Classical methods based on the rate of sublimation, rate of evaporation ...