Results 291 to 300 of about 1,249,488 (339)

Anoxia tolerance and freeze tolerance in hatchling turtles

Journal of Comparative Physiology B, 2005
Freezing survival in hatchling turtles may be limited by ischemic anoxia in frozen tissues and the associated accumulation of lactate and reactive oxygen species (ROS). To determine whether mechanisms for coping with anoxia are also important in freeze tolerance, we examined the association between capacities for freezing survival and anoxia tolerance ...
S A, Dinkelacker, J P, Costanzo, R E, Lee   +2 more
openaire   +2 more sources

Physically Crosslinked Silk Fibroin Based Tough Hydrogel Electrolyte with Exceptional Water-Retention and Freezing-Tolerance.

ACS Applied Materials and Interfaces, 2020
Flexible ionic conductive hydrogel is attracting massive interests as it could be one of the crucial components for multifunctional ionotronic devices. However, their features of inevitably drying out without package and freezing at subzero temperature ...
Wenqi Wang, Yizhuo Liu, Shiqiang Wang, Xuemei Fu, Tiancheng Zhao, Xin Chen, Z. Shao   +6 more
semanticscholar   +1 more source

Differential phosphorylation of Ca2+-permeable channel CNGC20 modulates calcium-mediated freezing tolerance in Arabidopsis.

The Plant Cell
Plants respond to cold stress at multiple levels, including increasing cytosolic calcium (Ca2+) influx and triggering the expression of cold-responsive genes.
Yue Peng, Yuhang Ming, Bochen Jiang, Xiuyue Zhang, Diyi Fu, Qihong Lin, Xiaoyan Zhang, Yi Wang, Yiting Shi, Zhizhong Gong, Yanglin Ding, Shuhua Yang   +11 more
semanticscholar   +1 more source

Freeze Tolerance and Freeze Avoidance in Ectotherms

1989
The vast majority of ectothermic animals on earth must elude exposure to subzero temperatures to prevent the lethal freezing of body fluids. For this reason the northern ranges of many ectotherms are limited; thus, few terrestrially-hibernating reptile and amphibian species are found in northern latitudes (Behler and King 1979) and the diversity of ...
K. B. Storey, J. M. Storey
openaire   +1 more source

Physiological responses of freeze-tolerant and -intolerant frogs: clues to evolution of anuran freeze tolerance

American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 1993
Freeze tolerance in the wood frog, Rana sylvatica, is promoted by multiple, integrated physiological responses to ice forming within body tissues. By analyzing the freezing responses of the sympatric, but freeze intolerant, leopard frog (R. pipiens), we sought clues to the evolution of anuran freeze tolerance.
J P, Costanzo, R E, Lee, P H, Lortz
openaire   +2 more sources

Organic Solutes in Freezing Tolerance

Comparative Biochemistry and Physiology Part A: Physiology, 1997
The accumulation of high levels of low-molecular-weight solutes (polyhydric alcohols, saccharides) provides cryoprotection to freeze-tolerant animals by minimizing, via colligative effects, the percentage of body water converted to extracellular ice and the extent of cell volume reduction.
openaire   +2 more sources

Plasma membrane aquaporins PIPs act in concert to regulate cold acclimation and freezing tolerance responses in Arabidopsis thaliana.

Plant and Cell Physiology, 2020
Aquaporins play a major role in plant water uptake at both optimal and environmentally stressed conditions. However, the functional specificity of aquaporins under cold remains obscure.
A. Rahman, Y. Kawamura, M. Maeshima, Abidur Rahman, M. Uemura   +4 more
semanticscholar   +1 more source

Freezing Tolerance in an Adult Insect

Science, 1969
The adult carabid beetle Pterostichus brevicornis tolerates freezing under natural conditions. Laboratory tests confirm that winter beetles tolerate temperatures below -35°C, whereas summer beetles die if frozen at -6.6°C. Winter beetles can be cooled to about -10°C before freezing, and they thaw near -3.5°C. Summer
openaire   +2 more sources

Freezing Tolerance in Some Antarctic Nematodes

Functional Ecology, 1993
Nematodes are an important component of the terrestrial Antarctic biota and must survive exposure to sub-zero temperatures. This paper shows that a number of Antarctic nematodes are freezing tolerant. The cold tolerance strategies of nine taxa of terrestrial Antarctic nematodes from a variety of mosses and an alga during freezing in contact with water ...
Wharton, D. A., Block, William
openaire   +2 more sources

Natural Freeze Tolerance in Ectothermic Vertebrates

Annual Review of Physiology, 1992
Amphibians and reptiles living in seasonally cold regions of the earth face several challenges to their continued survival. These include short summer seasons for the development of eggs and juveniles, long periods of fasting when food supplies are interrupted by winter, and months of cold exposure at environmental temperatures often well below the ...
K B, Storey, J M, Storey
openaire   +2 more sources