Now showing items 21-30 of 36
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 ...
Intersyngenic variations in the esterases of axenic stocks of Paramecium aurelia
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1971-04)
The esterase isozymes were surveyed in axenic stocks of syngens 1, 2, 4, 5, 6, and 8 of Paramecium aurelia by starch gel electrophoresis. In paramecia there appear to be four types of esterases which are clearer in axenic ...
Intersyngenic variations in the esterases and acid phosphatases of Tetrahymena pyriformis
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1971-04)
The esterase and acid phosphatase isozymes were surveyed in strains of syngens 2–12 under conditions found to be optimal for syngen 1. Both intersyngenic and intrasyngenic variations were found. Comparisons of the esterases ...
How to determine the compatibility of undirected character state trees
(Elsevier, 1979-10)
Methods for cladistic character compatibility analysis have required a priori estimates of the direction of evolutionary trends among the states of a character, in order to ensure consistency. Results are presented here ...
Roles of metabolic level and temperature regulation in the adjustment of Western plumed pigeons (Lophophaps ferruginea) to desert conditions
(Elsevier, 1973-02-01)
1. 1. Standard metabolic rate of western plumed pigeons (Lophophaps ferruginea) averages 0[middle dot]88 ml O2 (g hr)-1 during summer. This rate and the rate of evaporative water loss by these birds at 25[deg]C are well ...
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 ...
Seasonal acclimatization to temperature in cardueline finches
(Springer-Verlag, 1978-06)
1. Seasonal variation in body constituents and utilization of lipid, protein, and carbohydrate during cold stress in American goldfinches were studied to determine relations of these functions to the pronounced seasonal ...
Morphogenic effects of halogenated thymidine analogs on drosophila II. Incorporation of 5-bromodeoxyuridine into DNA
(Elsevier, 1972-01)
When 5-bromodeoxyuridine is fed to Drosophila larvae, a variety of morphogenic lesions are found in the hatching adults. Experiments were undertaken to determine whether 5-bromodeoxyuridine is incorporated into Drosophila ...
The interrelationship of cell growth and division in haploid and diploid cells of Saccharomyces cerevisiae
(Elsevier, 1977-05)
The coordination of cell growth and division has been examined in isogenic haploid and diploid strains of Saccharomyces cerevisiae. The average cell volume of the haploid and diploid cells was unaffected by a range of ...
Thermoregulation and heterothermy in some of the smaller flying foxes (Megachiroptera) of New Guinea
(Springer-Verlag, 1970-06)
Body temperature, heterothermy, oxygen consumption, heart rate, and evaporative water loss were studied in four species of flying foxes (Megachiroptera), Dobsonia minor, Nyctimene major, Nyctimene albiventer , and Paranyctimene ...