Now showing items 531-540 of 584
Relativistically parameterized extended Huckel theory
(Elsevier, 1979-04-01)
A relativistically parameterized extended Huckel molecular orbital method is outlined. One-electron effective hamiltonian matrix elements are related to the corresponding overlap matrix elements calculated in an atomic ...
Cholesterol biosynthesis in human fetal liver and adrenal
(Elsevier, 1971-07)
Hepatic and adrenal cholesterol biosynthesis were investigated in the human fetus in vitro by measuring the incorporation of acetate-2-14C into cholesterol by slices of liver and adrenals from the same fetus. To differentiate ...
Sulfhydryl reactivity of human erythrocyte superoxide dismutase : On the origin of the unusual spectral properties of the protein when prepared by a procedure utilizing chloroform and ethanol for the precipitation of hemoglobin
(Elsevier, 1978-11-20)
1. 1.|During purification of human superoxide dismutase by the McCord-Fridovich procedure (McCord, J.M. and Fridovich, I. (1969) J. Biol. Chem. 244, 6049-6055) the `extra' sulfhydryl groups react with a variety of sulfur ...
Distinct testicular 17-ketosteroid reductases, one in interstitial tissue and one in seminiferous tubules : Differential modulation by testosterone and metabolites of testosterone
(Elsevier, 1976-10-21)
The final step in the biosynthesis of testosterone is the reduction of androstenedione, which is catalyzed by the microsomal enzyme 17-ketosteroid reductase. Evidence is presented which suggests that there are two distinct ...
An N-acetyl--glucosamine binding lectin from Bandeiraea Simplicifolia seeds
(Elsevier, 1976-11)
A second lectin with a high activity for nonreducing 2-acetamido-2-deoxy-[alpha]--glucopyranosyl residues has been isolated from the seed extracts of Bandeiraea simplicifolia by affinity chromatography on chitin. The lectin ...
The properties of parsley ferredoxin and its selenium-containing homolog
(Elsevier, 1971-08-06)
The ferredoxin from parsley has been purified to a high degree. The protein contains 2.0 iron atoms per molecule, has an iron to labile sulfide ratio of unity and consumes 9 moles of mercurial, leading to calculated molecular ...
Chemical modification studies on the [alpha]--galactopyranosyl binding lectin from the seeds of Bandeiraea simplicifolia
(Elsevier, 1976-07-19)
The role of amino, carboxyl and sulfhydryl groups in the binding of carbohydrate ligands to the [alpha]--galactopyranosyl binding lectin from Bandeiraea simplicifolia has been evaluated using specific chemical modification ...
Thermal expansion in (La0.62Pb0.38)MnO3: Possible evidence for a coupling between elastic and magnetic exchange forces
(Elsevier, 1973-05)
Using single-crystal, automated diffractometer techniques, the linear coefficient of thermal expansion has been determined for La0.62Pb0.38MnO3 from 298 to 627 K. The linear coefficient of thermal expansion is observed to ...