Now showing items 11-20 of 21
The effect of activity on oxygen consumption, oxygen debt, and heart rate in the lizards Varanus gouldii and sauromalus hispidus
(Springer-Verlag, 1972-09)
Oxygen consumption and heart rate were measured during rest and activity in the lizards Varanus gouldii and Sauromalus hispidus . Oxygen debt was calculated from postactive oxygen consumption. Standard metabolic rates of ...
Models of lon and substrate cotransport and the effect of the membrane potential
(Elsevier, 1972-02)
The implications of a carrier model of ion and substrate cotransport are worked out. Each carrier is assumed to have one ion and one substrate binding site. The model includes features that have not been included in ...
Genome amplification and gene expression in the ciliate macronucleus
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1972-06)
The focus of this review is on the micronucleus and macronucleus in the ciliated protozoa and the organization and function of the DNA molecules within them. We present (1) some of the structural and functional differences ...
Metabolic regulation of aminoacyl-tRNA synthetase formation in bacteria
(Elsevier, 1972-10-17)
The cellular levels of several aminoacyl-tRNA synthetases vary with the rate of growth of , and of , in different media. Over a seven-fold range in growth rate the levels of arginyl- and of valyl-tRNA synthetase change ...
Functional differential equations and age dependent population growth
(Elsevier, 1972-08)
Growth equations are established for a population of individuals that have fixed age dependent reproduction and mortality rates. Equations are obtained both for the population density and for the numerical size of the ...
Aerobic and anaerobic metabolism during activity in the lizard Dipsosaurus dorsalis
(Springer-Verlag, 1972-09)
1. Oxygen consumption and lactate content of the lizard Dipsosaurus dorsalis were determined under standard conditions and for a bout of maximal activity induced by a 2-min period of electrical stimulation. Observations ...
A possible role in the regulation of primary amination for a complex of glutamine: [alpha]-Ketoglutarate amidotransferase and glutamate dehydrogenase in
(Elsevier, 1972-07-11)
Both glutamine: [alpha]-ketoglutarate amidotransferase and glutamate dehydrogenase activities are obtained from grown in minimal medium containing glucose and ammonia. These activities are not additive, suggesting an ...
The effect of a fusion of subpopulations on the total fixation index
(Springer-Verlag, 1972-01)
A general mathematical expression is found for the decrease in the fixation index of a population where subpopulations with different gene frequencies fuse. It is shown that the use of Wright's formulas for a hierarchic ...
Morphogenic effects of halogenated thymidine analogues on Drosophila . I. Quantitative analysis of lesions induced by 5-bromodeoxyuridine and 5-fluorouracil
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1972-02)
When 5-fluorouracil (FU) is offered simultaneously with 5-bromodeoxyuridine (BUdR) to Drosophila larvae, a variety of bristle modifications and hyperplastic growths are found on the wings of the adult flies. Administration ...
Systems approach to the study of drug transport across membranes using suspension cultures of mammalian cells : I. Theoretical diffusion models
(Elsevier, 1972-03)
Some general physical models are described for the diffusional transport of drugs across membranes of cells in culture suspensions. The models provide a basis for the design and analysis of experiments that are aimed to ...