Now showing items 1-10 of 27
Seasonal variation of metabolism and thyroid activity in the Mexican ground squirrel Citellus mexicanus
Metabolic measurements in thermal neutrality for the Mexican ground squirrel, Citellus mexicanus, in-dicated a mean summer metabolism of 1.10± .08 cc 02/gm/hr and a mean winter metabolism of .56±.08 cc 02/gm/hr. Animals ...
Carbon dioxide fixation and glycogenesis in the flatworm Hymenolepis diminuta
The cyclophyllidean cestode Hymenolepis diminuta has been found to incorporate C1402 into organic acids, amino acids, and glycogen upon in vivo incubation. This incorporation was sensitive to incubation conditions, more ...
The water metabolism and temperature regulation of the primitive Heteromyids, Liomys irroratus and Liomys salvani
The Heteromyidae are a family of rodents which arose in the middle Oligocene. Some present day members of this family inhabit the deserts of southwestern North America. Studies on the water metabolism of these animas have ...
Some effects of light intensity and oxygen concentration of Chlorella sorokiniana and an oxygen resistant strain
Experiments were carried out to compare the thermotolerant unicellular green alga Chlorella sorokiniana and an oxygen resistant strain isolated from the species. Studies were made at 39°C over a range of light intensities ...
The effects of food and density on the population dynamics of Australorbis glabratus
The growth and fecundity of populations of Australorbis glabratus, snail vector of Schistosoma mansoni, were measured both in the laboratory and in the field to determine, in part, the effects of quality food and large ...
Genetic studies of mutants of Neurospora crassa lacking ornithine transcarbamylase
Arginine has long been of interest to chemists, biochemists and biologists because of its close relation-ship to urea. Srb and Horowitz (1944) isolated many arginineless mutants of Neurospora crassa and found the mutants ...