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The effects of bromocriptine and prolactin on porphyrin biosynthesis in the Harderian gland of the male hamster, Mesocritecus auratus
Springer Science and Business Media LLC - Tập 164 - Trang 524-529 - 1995
F. A. Marr, S. W. Shah, J. McGadey, M. R. Moore, T. Houston, A. P. Payne
Porphyrin biosynthesis was examined in the Harderian gland of the male golden hamster by fluorometric assays of gland porphyrin content and by measuring the activity of a rate-limiting enzyme for haem biosynthesis, 5-aminolaevulinic acid synthase. Both porphyrin content and enzyme activity are low in normal male glands but were greatly raised in males castrated for 6 weeks. However, porphyrin synt...... hiện toàn bộ
Standard energetics of leaf-nosed bats (Hipposideridae): its relationship to intermittent- and protracted-foraging tactics in bats and birds
Springer Science and Business Media LLC - Tập 173 - Trang 43-53 - 2003
F. J. Bonaccorso, B. K. McNab
Basal rates of metabolism within the insectivorous genera Hipposideros and Ascelliscus, Old World leaf-nosed bats (Hipposideridae), ranged from 58% to 77% of the mammalian standard. The larger species, Hipposideros diadema and Hipposideros maggietaylori, effectively thermoregulated at ambient temperatures down to 9 °C, whereas two smaller species, Hipposideros galeritus and Hipposideros cervinus, ...... hiện toàn bộ
Nocturnal lizards from a cool-temperate environment have high metabolic rates at low temperatures
Springer Science and Business Media LLC - Tập 180 - Trang 1173-1181 - 2010
Kelly M. Hare, Shirley Pledger, Michael B. Thompson, John H. Miller, Charles H. Daugherty
Ectotherms from low-temperature environments have higher metabolic rates at low temperatures than those from warm-temperature environments. We predicted that nocturnal lizards, which are active at much lower environmental temperatures than diurnal lizards, would also have higher metabolic rates at low temperatures, and by association a lower thermal sensitivity (Q 10) than ...... hiện toàn bộ
Are summit metabolism and thermogenic endurance correlated in winter-acclimatized passerine birds?
Springer Science and Business Media LLC - Tập 171 - Trang 475-481 - 2001
David L. Swanson
Small birds exhibiting marked winter improvement of cold tolerance also show elevated summit metabolic rates (maximum cold-induced metabolic rate) in winter relative to summer. However, relatively large increases in cold tolerance can occur with only minor increments of maximum cold-induced metabolic rate and geographic variation in cold tolerance is not always positively correlated with variatio...... hiện toàn bộ
The emersion response of the Australian Yabby Cherax destructor to environmental hypoxia and the respiratory and metabolic responses to consequent air-breathing
Springer Science and Business Media LLC - Tập 168 - Trang 389-398 - 1998
S. Morris, J. Callaghan
The Australian Yabby Cherax destructor voluntarily emerges from water to breathe air with increased frequency as water PO2 decreases. When the water PO2 declined below 2.7 kPa the crayfish spent >50% of time breathing air. The respiratory gas transport, acid-base, ionic and energetic status were quantified in simulations of this emersion behaviour to determine the benefits that the crayfish may g...... hiện toàn bộ
The ionic hemolymph composition of the terrestrial isopod Porcellio scaber Latr. during molt
Springer Science and Business Media LLC - Tập 167 - Trang 536-542 - 1997
A. Ziegler, F. H. E. Scholz
We analyzed the ionic composition of the hemolymph of Porcellio scaber in four different stages of the molt cycle using capillary electrophoresis and calcium selective mini- and microelectrodes. The main ions in the hemolymph were K+, Ca2+, Na+, Mg+, and Cl−. The values for total calcium obtained by means of capillary electrophoresis and calcium selective minielectrodes did not differ significant...... hiện toàn bộ
The effects of salinity stress on the electrophysiological properties ofMya arenaria neurons
Springer Science and Business Media LLC - - 1981
Linda S. Beres, Sidney K. Pierce
Postnatal development of muscle biochemistry in nursing harbor seal (Phoca vitulina) pups: limitations to diving behavior?
Springer Science and Business Media LLC - Tập 180 - Trang 757-766 - 2010
J. S. Prewitt, D. V. Freistroffer, J. F. Schreer, M. O. Hammill, J. M. Burns
Adult marine mammal muscles rely upon a suite of adaptations for sustained aerobic metabolism in the absence of freely available oxygen (O2). Although the importance of these adaptations for supporting aerobic diving patterns of adults is well understood, little is known about postnatal muscle development in young marine mammals. However, the typical pattern of vertebrate muscle development, and r...... hiện toàn bộ
Cuticular permeability of the black widow spiderLatrodectus hesperus
Springer Science and Business Media LLC - - 1989
Neil F. Hadley, Michael Quinlan
Trehalase in the spermatophore from the bean-shaped accessory gland of the male mealworm beetle, Tenebrio molitor: purification, kinetic properties and localization of the enzyme
Springer Science and Business Media LLC - Tập 166 - Trang 1-10 - 1996
T. Yaginuma, T. Mizuno, C. Mizuno, M. Ikeda, T. Wada, K. Hattori, O. Yamashita, G. M. Happ
Trehalase from the bean-shaped accessory glands of the male mealworm beetle, Tenebrio molitor, was purified by acid treatment, with subsequent chromatography on columns of DEAE-cellulofine and Sephacryl S-300. The molecular masses of the native and the denatured forms were estimated to be 43 and 62 kDa by gel filtration and SDS-PAGE, respectively, an indication that the trehalase may be composed o...... hiện toàn bộ
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