It is well known that cold environments are predominant over the Earth and there are a great number of reports analyzing bacterial adaptations to cold. Most of these works are focused on characteristics traditionally involved in cold adaptation, such as the structural adjustment of enzymes, maintenance of membrane fluidity, expression of cold shock proteins and presence of compatible solutes. R...

Many morphological features of the Pleistocene fossil hominin Homo neanderthalensis, including the reputed large size of its paranasal sinuses, have been interpreted as adaptations to extreme cold, as some Neanderthals lived in Europe during glacial periods. This interpretation of sinus evolution rests on two assumptions: that increased craniofacial pneumatization is an adaptation to lower ambi...

HSIEH, A. C. L. AND L. D. CARLSON. Role of adrenaline and noradrenuline in chemical regulatz’mt of heat floduction. Am. J. Physiol. 190(2) : 243-246. 1957.-Cold-adapted spinal rats showed a greater increase in oxygen consumption following adrenaline than did warm-adapted ones. Thyroidectomy reduced the responses of warmand cold-adapted spinal rats to about the same levels. In curarized rats, ex...

Representative viruses from twelve RNA and two DNA virus genera have been successfully adapted to growth at sub-optimal temperature (cold-adapted). In almost every case, there was a correlation between acquisition of the cold-adaptation phenotype and loss of virulence in the normal host whether animal or man. Overall, the best method of cold adaptation to develop a live virus vaccine line appea...

1. Michaelis constants of goldfish brain choline acetyltransferase were found to depend on the concentration of the second substrate present and on the temperature to which the fish had been adapted. 2. Primary plots constructed from results obtained with enzyme prepared from cold-adapted or warm-adapted fish indicated that synthesis of acetylcholine took place by a sequential mechanism. 3. The...