Now showing items 511-520 of 554
Interfacial fracture energy and the toughness of composites
(Kluwer Academic Publishers; Chapman and Hall ; Springer Science+Business Media, 1974-03)
The premises upon which prevailing composite toughness theories are based are discussed in the light of observed strength variations in boron-epoxy composites with differing shear strengths of the interfacial bond. None ...
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 ...
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 ...
Biphasic kinetic plots and specific analogs distinguishing and describing amino acid transport sites in S37 ascites tumor cells
(Elsevier, 1975-06-25)
Curve-fitting procedures indicated that exo-2-amino-bicyclo-(2,2,1)-heptane-2-carboxylic acid (BCH) modified V and Km for one of two systems serving for histidine transport into the S37 ascites tumor cells. When this system ...
A complete general valence force field for secondary chlorides
(Elsevier, 1973-12)
A general valence force field for secondary chlorides has been refined which includes torsional force constants based on assignments of low frequency modes in model compounds. This force field also incorporates force ...