Now showing items 1-10 of 293
Role of gangliosides in gonadotropin and cholera enterotoxin stimulated steroidogenesis in isolated rat ovarian cells
(Elsevier, 1978-07-28)
Ovarian cells isolated from 26 day old rats responded to hCG (10 ng/ml) and cholera enterotoxin (100 ng/ml) with a forty-five to fifty-fold increase in progesterone production. Both cholera enterotoxin and hCG-stimulated ...
Development of crystalline inclusions (“ergosterol crystals”) in Neurospora crassa
(Springer-Verlag, 1976-09)
Development of crystalline inclusions (“ergosterol crystals”) in “snowflake”, a morphological mutant of Neurospora crassa has been examined. The inclusions which arise in membranebound organelles appear as electron dense ...
Effect of divalent metal ion binding on the Raman spectrum of ATP in aqueous solution
(Elsevier, 1970-01-23)
The apparent dissociation constants for the secondary H+ of HATP-3, CaHATP-1, MgHATP-1 and ZnHATP-1 were determined by studying the pH dependent frequency of a particular line in the Raman spectrum of ATP. We obtained the ...
Inhibition of cellular ATP-hydrolyzing activity by tricyclic antidepressants and phenothiazine tranquilizers
(Elsevier, 1975-05-01)
In a variety of cellular and subcellular preparations, total ATP-hydrolyzing activity was potently inhibited by tricyclic antidepressants (TA) and phenothiazine tranquilizers (PT). In leukocytes, preincubation of the cells ...
Two routes for synthesis of phosphoenolpyruvate from C4-dicarboxylic acids in
(Elsevier, 1974-08-19)
Mutants of defective in both phosphoenolpyruvate carboxykinase and phosphoenolpyruvate synthetase are unable to use C4-dicarboxylic acids such as succinate and malate as carbon and energy sources for growth. Revertants ...
The stimulation of cerebral N2-methyl- and N22-dimethyl guanine-specific tRNA methyltransferases by methionine sulfoximine: An study
(Elsevier, 1977-06-20)
The administration of a single convulsant dose or of multiple subconvulsant doses of L-methionine-dl-sulfoximine (MSO) to 18-day old rats results in a significant elevation of the specific activity of cerebral tRNA ...
Choosing category size in a stage projection matrix
(Springer-Verlag, 1978-01)
A basic problem associated with choosing category size in a stage projection matrix is described. “Errors of estimation” are large if the category size is chosen too small and “errors of distribution” are large if the ...
Comparative ultrastructural study of normal and grafted skin in the frog, Rana pipiens , with special reference to neuroepithelial connections
(Springer-Verlag, 1973-06)
Recent investigations have suggested specific differences in back and belly skin in anurans which appear to influence the quality of reflex responses obtained from various areas of the animals body. The present investigation ...