Results 131 to 140 of about 2,780 (171)
Some of the next articles are maybe not open access.
Natural hypometabolism during hibernation and daily torpor in mammals
Respiratory Physiology & Neurobiology, 2004(Uploaded by Plazi for the Bat Literature Project) Daily torpor and hibernation are the most powerful measures of endotherms to reduce their energy expenditure. During entrance into these torpid states metabolic rate is suppressed to a fraction of euthermic metabolism, paralleled by reductions in ventilation and heart rate.
Gerhard, Heldmaier +2 more
openaire +3 more sources
Metabolic adjustments during daily torpor in the Djungarian hamster
American Journal of Physiology-Endocrinology and Metabolism, 1999Djungarian hamsters ( Phodopus sungorus) acclimated to a short photoperiod (8:16-h light-dark cycle) display spontaneous daily torpor with ad libitum food availability. The time course of body temperature (Tb), metabolic rate, respiratory quotient (RQ), and substrate and enzyme changes was measured during entrance into torpor and in deep torpor.
G, Heldmaier +5 more
openaire +2 more sources
Reduction of metabolic rate and thermoregulation during daily torpor
Journal of Comparative Physiology B, 1995Physiological mechanisms causing reduction of metabolic rate during torpor in heterothermic endotherms are controversial. The original view that metabolic rate is reduced below the basal metabolic rate because the lowered body temperature reduces tissue metabolism has been challenged by a recent hypothesis which claims that metabolic rate during torpor
X, Song, G, Körtner, F, Geiser
openaire +2 more sources
Hibernation and Daily Torpor in Marsupials - a Review
Australian Journal of Zoology, 1994Most heterothermic marsupials appear to display one of the two patterns of torpor that have been described in placental mammals. During shallow, daily torpor body temperature (T(b)) falls for several hours from about 35-degrees-C to values between 11 and 28-degrees-C, depending on the species, and metabolic rates fall to about 10-60% of the basal ...
openaire +1 more source
Intracellular pH during daily torpor inPeromyscus maniculatus
Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology, 1990Intracellular and extracellular acid-base parameters during normothermy and daily torpor were examined in deer mice (Peromyscus maniculatus). [14C]Dimethyloxazolidinedione and [3H]inulin were used to assess intracellular pH in liver, heart, skeletal muscle, and brain. Buffering capacities were determined using tissue homogenates. A significant increase
exaly +3 more sources
Physiological Zoology, 1995
Hibernation and daily torpor are usually considered to be two distinct patterns of heterothermia. In the present comparison we evaluated (1) whether physiological variables of torpor from 104 avian and mammalian species warrant the distinction between hibernation and daily torpor as two different states of torpor and (2), if so, whether this ...
Fritz Geiser, Thomas Ruf
openaire +1 more source
Hibernation and daily torpor are usually considered to be two distinct patterns of heterothermia. In the present comparison we evaluated (1) whether physiological variables of torpor from 104 avian and mammalian species warrant the distinction between hibernation and daily torpor as two different states of torpor and (2), if so, whether this ...
Fritz Geiser, Thomas Ruf
openaire +1 more source
Leptin increases energy expenditure of a marsupial by inhibition of daily torpor
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 1998Leptin plays an important role in regulating body fat stores of placental mammals, but the contribution of changes in energy expenditure to this adjustment remains controversial. We were interested in how recombinant murine leptin would affect metabolic rate (MR) and body temperature (Tb) of a marsupial mammal ( Sminthopsis macroura, 25 g) known to ...
F, Geiser, G, Körtner, I, Schmidt
openaire +2 more sources
Daily torpor in a brazilian murine opossum (marmosa)
Comparative Biochemistry and Physiology, 19621. 1. Energy metabolism (oxygen consumption) and body temperature were studied in a single 13 g specimen of the mouse opossum, Marmosa, from Sao Paulo, Brazil. Ten day-long metabolic experiments (104 hr) were carried out. 2. 2. The animal could be characterized by a basal level of 1·80 cm3 O2/g-hr, a thermal conductance of 0·258 cm3 O2/g-hr-°C ...
P Morrison, B.K McNab
openaire +1 more source
Journal of Comparative Physiology B, 2014
The Djungarian hamster is a rodent species that expresses both spontaneous daily torpor (SDT) when acclimated to winter conditions as well as fasting-induced torpor (FIT) during summer. In an earlier report we argued that these two thermoregulatory phenomena differ in several parameters.
Victoria, Diedrich +2 more
openaire +2 more sources
The Djungarian hamster is a rodent species that expresses both spontaneous daily torpor (SDT) when acclimated to winter conditions as well as fasting-induced torpor (FIT) during summer. In an earlier report we argued that these two thermoregulatory phenomena differ in several parameters.
Victoria, Diedrich +2 more
openaire +2 more sources
Daily Torpor in the Marsupial Mouse, Sminthopsis larapinta (Spencer)
Nature, 1966A PERIODIC and often diurnal lowering of the body temperature has been reported in birds and bats1, rodents belonging to six different families2, and among marsupials (Eudromicia3;, Cercartetus3,4). The associated inactive state is known as torpor to distinguish it from hibernation and aestivation, which are seasonal phenomena.
openaire +2 more sources