Now showing items 51-60 of 330
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 ...
Kinetics of the conversion of glucose to gluconic acid by Pseudomonas ovalis
(Wiley Subscription Services, Inc., A Wiley Company, 1970-03)
The concept of a “critical oxygen concentration” is conventionally considered to hold for the submerged aerobic fermentation of glucose to gluconic acid. Above the critical level the fermentation rate is supposedly independent ...
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 ...
Presence of multiple protein kinase activities in rat liver nuclei
(Elsevier, 1972-02-25)
Protein kinase activity was found in the acidic nuclear protein fraction extracted from rat liver nuclei. Four distinct kinase activities were separated by phosphocellulose and DEAE-Sephadex chromatography. Additional ...
Aliphatic hydroxylation by highly purified liver microsomal cytochrome P-450. Evidence for a carbon radical intermediate
(Elsevier, 1978-03-15)
The oxidation of norbornane by a reconstituted liver cytochrome P-450 system affords - and -2-norborneol in a ratio of 3.4:1. The ratio of these products was found to be 0.76:1 when -2,3,5,6-tetradueteronorbornane was ...