Now showing items 21-29 of 29
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 ...
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 ...
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 ...
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 ...
Electron microprobe analysis of silica cells in leaf epidermal cells of Cyperus alternifolius
(Martinus Nijhoff, The Hague/Kluwer Academic Publishers; Martinus Nijhoff ; Springer Science+Business Media, 1972-02)
Electron microprobe analysis was used to examine relative amounts of selected accessory elements (Ca, Mg, K, Na, P, Mn, and Fe) associated with silicon in silica cells in leaf epidermal cells of Cyperus alternifolius . In ...
Nucleotide sequence divergence among DNA fractions of different syngens of Tetrahymena pyriformis
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1974-09)
The magnitude of the differences in base sequence of DNA fractions derived from different syngens of the ciliated protozoan Tetrahymena pyriformis was investigated. Each DNA was fractionated into unique and repeated sequences ...