Now showing items 11-20 of 33
Evolutionarily stable dispersal strategies
(Elsevier, 1980-01-21)
Using the idea that life-history parameters are subject to natural selection and should approach values that are stable optima, with the population immune to invasion by mutant individuals, we derive an analytic expression ...
Induction of both cytochromes P-450 and P-448 by 2,3',4,4',5-pentabromobiphenyl, a component of fireMaster
(Elsevier, 1980-01-15)
The synthesis and purification of a component of fireMaster BP-6 and fireMaster FF-1, 2,3',4,4',5-pentabromobiphenyl, is described. The compound was found to be a potent inducer of liver microsomal drug-metabolizing enzymes ...
The influence of hygroscopic movement on seed dispersal in Daucus carota (Apiaceae)
(Springer-Verlag, 1980-01)
The influence of hygroscopic movement on seed dispersal in Daucus carota was examined. When relative humidity increases, umbels containing mature fruits close; when relative humidity drops, umbels open. Tests of the ...
The in vitro loss of penicillamine in plasma, albumin solutions, and whole blood: Implications for pharmacokinetic studies of penicillamine
(Elsevier, 1980-07-21)
The recent development of a high performance liquid chromatography assay method for the analysis of penicillamine in biological samples such as plasma, whole blood, and urine has provided a specific and sensitive assay ...
Mathematical models for continuous culture growth dynamics of mixed populations subsisting on a heterogeneous resource Base: I. Simple competition
(Elsevier, 1980-02)
The classical Monod model for bacterial growth in a chemostat, based on a Michaelis-Menten kinetic analog, is restated in terms of an approximate Lotka-Volterra formulation. The parameters of these two formulations are ...
Effect of microtubule-disrupting drugs on protein and RNA synthesis in Physarum polycephalum amoebae
(Springer-Verlag, 1980-11)
The effects of the microtubule-disrupting drugs, colchicine, vinblastine, podophyllotoxin, griseofulvin, and lumicolchicine (10 -5 M), on protein and RNA synthesis were studied in Physarum polycephalum amoebae in culture. ...
Solubilization and chromatographic separation of gonadotrop in receptor from adenylate cyclase in ovarian preparations
(Elsevier, 1980-02-27)
The distribution of gonadotropin receptor and adenylate cyclase activities has been monitored in Sepharose 6B chromatographic eluates of a Lubrol solubilized fraction of 25 day old rat ovarian tissue. The receptor was ...
Purification of bovine liver microsomal NADH-cytochrome reductase using affinity chromatography
(Elsevier, 1980-07-16)
Microsomal NADH-cytochrome reductase has been purified from bovine liver by an improved procedure which employs affinity chromatography on ADP-agarose in combination with anion exchange chromatography. The reductase was ...
The effect of termination of membrane phospholipid synthesis on cell-dependent events in caulobacter
(Elsevier, 1980-04-05)
Membrane phospholipid synthesis in Caulobacter crescentus has been shown to be related to the expression of specific cell cycle events. DNA synthesis was immediately inhibited if phospholipid synthesis was terminated either ...
Altered purine and pyrimidine metabolism in erythrocytes with purine nucleoside phosphorylase deficiency
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1980-04)
Purine and pyrimidine metabolism was compared in erythrocytes from three patients from two families with purine nucleoside phosphorylase deficiency and T-cell immunodeficiency, one heterozygote subject for this enzyme ...