Now showing items 351-360 of 384
Rapid activation analysis of trace copper in tissue using 5.1-minute copper-66
(Elsevier, 1963-07)
Microgram amounts of copper have been analyzed by rapid activation analysis in rat kidney tissue. An 8-min radiochemical separation coupled with gamma-ray spectrometry permitted utilization of the 5.1-min copper-66 ...
Purification and properties of trehalase(s) from Neurospora
(Elsevier, 1963-09)
Trehalase has been obtained in crystalline form from the mycelium of Neurospora crassa. During elution from the first pass through a DEAE-cellulose column, two peaks with trehalase activity were obtained. When the first ...
Radiochemical separation of indium by amalgam-exchange
(Elsevier, 1962-01)
The radiochemical separation of indium by an amalgam-exchange technique has been critically evaluated for the aqueous hydrogen bromide system. The efficiency and contamination of the separation has been studied using tracers ...
Semipermeable ion-exchange membranes as a preconcentration matrix for trace analysis by electrochemical and neutron-activation techniques
(Elsevier, 1969-01)
Ion-exchange membranes were used in conjunction with neutron-activation analysis and anodic stripping voltammetry for the determination of certain trace metal ions. The various parameters which govern the applicability, ...
Stability of a fluid in a rectangular region heated from below
(American Institute of Chemical EngineersWiley Periodiocals, Inc., 1967-01)
Finite-difference methods were used to compute hydrodynamic instability due to natural convection in an enclosed horizontal rectangular region heated from below. Critical Rayleigh numbers were determined for a series of ...
Isotopic tracer studies on the biosynthesis of deoxyribose in the rat
(Elsevier, 1963)
The biosynthesis of deoxyribose, in vivo, was studied with NaH14CO3 as a tracer, in normal adult, starved adult, normal newborn, "thiamine-deficient" adult and "tumor bearing" rats and in Yoshida ascites-tumor cells. ...
Studies of the electron transport systems of heart muscle: Biochemical and antigenic properties of a soluble DPNH dehydrogenase
(Elsevier, 1968-04)
Highly purified DPNH dehydrogenase has been prepared from preparations of DPNH oxidase. The enzyme has an average molecular weight of 80,000 and contains flavin, nonheme iron, and labile sulfide groups in an approximate ...
A force field for secondary chlorides
(Elsevier, 1967-08)
A force field has been derived for monochloro- and 2,4-dichloro-hydrocarbons. The Snyder-Schachtschneider force field for hydrocarbons was used as a starting point, the constants associated with the secondary chlorine being ...
Tetrahedral approximation in normal coordinate calculations of high polymers
(Elsevier, 1965-06)
Two cases of changes in amino acid transport activity with tissue development
(Elsevier, 1965)
During the first day of extrauterine life the liver of the guinea-pig greatly intensifies the extent of the steady-state concentration of two amino acids, one normal and one non-metabolizable. Another change with tissue ...