the effects of prolonged administration of methylthiouracil were studied on several physiological parameters pertinent to the thyroid function in dog. though the individual variations of the measured parameters were not consistent but the statistical differences of diminution of basal metabolism rate, respiration rate and erythrocyte count- were significant brief explanations for the mechanism ...

We have determined the prototype sequence of the DNA which is eliminated in the course of chromatin diminution in Ascaris suum. This DNA which is virtually absent from somatic cells but retained in the germ line consists predominantly of highly repetitive sequences which are variants of an AT rich 123 base pair repeat unit. Both major and minor variants have been sequenced. The overall structur...

The enzymes that methylate tRNA were studied during the life cycle of the colonizing slime mold, Dictyostelium discoideum. Total and base specific tRNA methylase activities were determined in extracts from cells in morphogenetic synchrony. Eight hours after enforced aggregation, the total methylase capacity is reduced by about 40 per cent. The diminution appears to be due to the presence of inh...

It has been shown in this paper that stimulation of the inhibitory nerves of the neurogenic heart of Limulus, which correspond to the vagus nerves of the vertebrate heart, results in a marked diminution of CO(2) production in the heart ganglion, while stimulation of the ganglion, leading to increased activity of the heart, leads also to increased CO(2) production by the ganglion. This shows tha...

Introduction Because of ageing and loss of teeth, alveolar bone volume has a tendency to decrease, contrary to basal bone volume which seems to have no significant modification. The practician will have, if possible, to intervene before bone anomaly installation by intercepting bone resorption. (1) Bone volume diminution in posterior maxillary alveolar ridge is a combination of several simultan...