Now showing items 31-40 of 66
Heat capacities and thermodynamic properties of Li0.5Fe2.5O4 and Li0.5Al2.5O4 from 5 to 545 K
(Elsevier, 1975-07)
The heat capacities of Li0.5Fe2.5O4 and Li0.5Al2.5O4 were measured by adiabatic calorimetry from 5 to 545 K and no transitions or thermal anomalies were found. The lowtemperature heat capacity of Li0.5Fe2.5O4 shows the ...
Studies on the reconstitution of bovine erythrocyte superoxide dismutase : V. Preparation and properties of derivatives in which both zinc and copper sites contain copper
(Elsevier, 1975-08-19)
1. 1. We have developed a procedure for preparing derivatives of bovine superoxide dismutase in which primarily the Cu binding sites are occupied by Cu2+ (2 Cu2+-) and in which both the Zn and Cu binding sites are occupied ...
Regulatory effects of steroids on the pituitary response to LH-RH
(Elsevier, 1975-06)
The pituitary response to a continuous i.v. LH-RH administration (15 [mu]g/h/3 h) associated with physiological or pharmacological doses of several steroid hormones such as estradiol (E2), progesterone, 17[alpha]OH-progesterone, ...
The behavior of holo- and apo-forms of bovine superoxide dismutase at low pH
(Elsevier, 1975-11-18)
1. 1. Holo-superoxide dismutase from bovine erythrocytes has been shown to undergo a reversible structural modification in the pH 3-5 range.2. 2. The spectral alterations observed on changing from neutrality to pH 3 were: ...
Adenosine 3',5'-monophosphate dependent phosphorylation of ribosomes and ribosomal subunits from bovine corpus luteum
(Elsevier, 1975-05-05)
In a previous publication the purification and properties of two protein kinases (KI and KII) from a soluble fraction of bovine corpus luteum and the stimulation of the latter fraction by cyclic AMP and luteinizing hormone ...
The relative utilization of the acyl dihydroxyacetone phosphate and glycerol phosphate pathways for synthesis of glycerolipids in various tumors and normal tissues
(Elsevier, 1975-03-24)
Rates of phosphatidate synthesis from dihydroxyacetone phosphate via acyl dihydroxyacetone phosphate or glycerol phosphate are compared in homogenates of 13 tissues, most of which are deficient in glycerol phosphate ...
Radioiodination of sulfhydryl-sensitive proteins
(Elsevier, 1975-08)
A new procedure is described for the radioiodination of proteins with sulfhydryl groups essential for their biological activity. Aniline is iodinated with 125I-labeled sodium iodide in the presence of chloramine-T, the ...
A physical explanation of the EPR spectrum observed during catalysis by enzymes utilizing coenzyme B
(Elsevier, 1975-08-26)
We have proposed that the "doublet" EPR spectra observed during catalysis by a number of coenzyme B1,2-requiring enzymes arises from a weak electrostatic exchange interaction between an organic free radical and low spin ...
Exciton states in organic alloys: Naphthalene-perdeuteronaphthalene
(Elsevier, 1975-11-15)
The lower band-edge energy of the first single exciton of naphthalene has been determined as a function of concentration in a C10H8/C10D8 alloy. Experimentally, the vibronic 0-512 fluorescence at 2 K and 1 cm-1 resolution ...
A microscale isolation of hemins from hemeproteins by use of polyacrylamide gel electrophoresis
(Elsevier, 1975)
An analytical and semipreparative procedure has been developed for the isolation of the prosthetic groups of various hemeproteins by use of polyacrylamide gel electrophoresis. Electrophoresis of erythrocyte formylhemeprotein ...