Results 181 to 190 of about 15,605 (225)
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Gangliosides of dogfish (Squalus acanthias) brain
Neurochemistry International, 1997Eighteen gangliosides were isolated from dogfish (Squalus acanthias) brain, and their structures and compositions were determined by methylation analysis, enzymatic hydrolysis and partial hydrolysis with mild acid. Tetra- and pentasialogangliosides were also analysed by liquid secondary ion mass spectrometry.
K, Nakamura, Y, Tamai, T, Kasama
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Sound Reception in the Dogfish
Nature, 1963Kritzler and Wood1 succeeded recently in training a bull shark (Carcharhinus leucas) to respond to sine-wave sound signals emitted from a submerged loudspeaker. Responses occurred to frequencies between 100 and 1,500 c.p.s. A threshold curve shows that the animal was most sensitive to frequencies of 400–600 c.p.s.
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Urea transport in the dogfish kidney
Journal of Experimental Zoology, 1977AbstractThere is increasing evidence that urea movement across many epithelia involves more than passive diffusion. Of particular interest is the observation that urea transport across the erythrocyte membrane and across the vasopressin‐stimulated urinary bladder of the toad occurs by facilitated diffusion, and can be selectively inhibited by phloretin
R M, Hays +6 more
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Some kinetic properties of dogfish chymotrypsin
Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1987A comparison of some kinetic properties was made between bovine chymotrypsin and chymotrypsin isolated from the spiny dogfish (Squalus acanthias). The major difference between the two enzymes was observed in the molecular activity (kcat), with the dogfish enzyme being two to three times more active than the bovine enzyme.
M, Ramakrishna +2 more
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Angiotensin II releases catecholamines in dogfish
Comparative Biochemistry and Physiology Part C: Comparative Pharmacology, 1981Abstract 1. It has been suggested that the pressor response to angiotensin II in dogfish (Squalus acanthias) is due solely to catecholamine release from chromaffin bodies. 2. The concentration of plasma epinephrine and nonepinephrine was measured before and after injection of AII. 3.
D F, Opdyke +3 more
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Effects of Dogfish Urotensin II on Lipid Mobilization in the Fasted Dogfish, Scyliorhinus canicula
General and Comparative Endocrinology, 1994Previous studies, both in vitro and in vivo, have shown that urotensin II stimulates hepatic release of nonesterified fatty acids in teleost fish, but the effects of the peptide on lipid mobilization in elasmobranchs are unknown. Infusions of synthetic dogfish urotensin II (40 pmol/min/kg for 30 min followed by 400 pmol/min/kg for 30 min) into the ...
J M, Conlon +4 more
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Functional Organization of the Dogfish Vestibulocerebellum
Brain, Behavior and Evolution, 1982Electrophysiological and light microscopical studies were made on the dogfish vestibulocerebellum. The cell types, estimates of their numbers, and the organization of this part of the cerebellum are described and compared with the other lobes of the elasmobranch cerebellum.
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Nature, 1939
IN the course of a recent investigation, I have found that: (1) Migration of ova from the ovary to the cœlomic;lomic opening of the oviducts in Scylliorhynus canicula is entirely dependent upon ciliation, as it is in Amphibia1.
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IN the course of a recent investigation, I have found that: (1) Migration of ova from the ovary to the cœlomic;lomic opening of the oviducts in Scylliorhynus canicula is entirely dependent upon ciliation, as it is in Amphibia1.
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Intrinsic Vasomotion in the Dogfish Gill
Journal of Experimental Biology, 1962ABSTRACT It has been reported that fish may match the extent of their respiration to their need for gaseous exchange by failing to ventilate certain gills. One third of the respiratory movements of the lamprey (Lampetra fluviatilis), when in oxygenated tap water, consist of contractions of the anterior two or three branchial chambers ...
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