Now showing items 41-50 of 293
Immunocytochemical analysis of cells in the pars tuberalis of the rat hypophysis with antisera to hormones of the pars distalis
(Springer-Verlag, 1975-03)
The objective was to acquire evidence regarding the secretory capacity of cells in the pars tuberalis of the rat pituitary by the application of immunocytochemical staining. For this purpose the conjugated antibody and ...
Studies on the xanthine oxidase activity of mammalian cells
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1973-04)
Xanthine oxidase in man is confined to but a few tissues and is absent from cultured cell strains. In rodents, however, the enzyme is more widely distributed among the tissues and can be demonstrated in most cell lines. ...
Axon regeneration across the site of injury in the optic nerve of the newt Triturus pyrrhogaster
(Springer-Verlag, 1977-04)
The process by which axons regenerate following a freeze injury to the optic nerve of the newt was analyzed by light and electron microscopy. Freezing destroys cellular constituents in a one millimeter segment of the nerve, ...
Factors affecting body temperatures of toads
(Springer-Verlag, 1978-01)
Factors influencing levels and rates of variation of body temperature ( T b ) in montane Bufo boreas boreas and in lowland Bufo boreas halophilus were investigated as an initial step toward understanding the role of natural ...
Ecological specialization of Hawaiian Drosophila
(Springer-Verlag, 1975-03)
The ecological overlap of three species of Hawaiian Drosophila: D. mimica D. kambysellisi , and D. imparisetae , has been investigated by analysis of the community matrix. The basic model is a Lotka-Volterra formulation, ...
Insulin induction of tyrosine aminotransferase in synchronized hepatoma cells
(Elsevier, 1975-04-21)
Addition of insulin to unsynchronized rat hepatoma cells, previously incubated with dexamethasone, promotes a rapid increase in tyrosine aminotransferase activity. Mitotic cells in the presence or absence of colcemid are ...
Fruit production, migrant bird visitation, and seed dispersal of Guarea glabra in Panama
(Springer-Verlag, 1979-01)
The relationship between bird visitation and the size of the available fruit crop was studied at an understory tree ( Guarea glabra Vahl, Meliaceae) in the tropical wet forest of Barro Colorado Island, Panama Canal Zone. ...
DPNH peroxidase: Effector activities of DPN+
(Elsevier, 1977-09-09)
At suboptimal H2O2 concentrations, DPNH inhibits the peroxidase activity of the flavoprotein, DPNH peroxidase, by converting the enzyme to an unstable intermediate that decays slowly to inactive enzyme. It is postulated ...
Transport equations for a microbial predator-prey community
(Springer-Verlag; Springer-Verlag New York Inc., 1977-06)
A transport equation is used which describes the temporal behavior of interacting populations in changing environments. The formulation takes into account the internal state variables of the individuals. The general theory ...
Fatty acid and hydrocarbon hydroxylation in yeast: Role of cytochrome P-450 in
(Elsevier, 1971-02-05)
A soluble enzyme system which catalyzes the conversion of fatty acids to their [omega]-hydroxy derivatives and -alkanes to primary alcohols has been obtained from a strain of grown on tetradecane as the carbon source. The ...