Results 181 to 190 of about 23,851 (230)
Toxicants and Osmoregulation in Fish [PDF]
Animal Biology, 1991 Fish are extremely sensitive to many water-borne toxicants, because these affect the gills by increasing the permeability to water and ions of the gill epithelium and by inhibition of the ion exchange activity of the chloride cells. The compensatory responses of the fish will significantly increase the energy required for maintenance of water and ion ...
R A C Lock, S E Wendelaar Bonga
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Osmoregulation in the Periplasm
2014The only periplasmic components whose synthesis was found to be induced by low osmotic pressure in various bacterial species are osmoregulated periplasmic glucans (OPGs). OPG structures found in different bacterial species share several common characteristics: (i) D-glucose is the only constituent sugar; (ii) glucose units are linked, at least ...
Bohin, Jean-Pierre, Lacroix, Jean-Marie
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1980
Various aspects of the involvement of ions in osmoregulation (turgor regulation, volume regulation) have been reviewed recently by Bisson and Gutknecht (1979), Cram (1976), Flowers et al. (1977), Hellebust (1976), Osmond (1979) and by Pitman and Cram (1977).
J A, Raven, F A, Smith, S E, Smith
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Various aspects of the involvement of ions in osmoregulation (turgor regulation, volume regulation) have been reviewed recently by Bisson and Gutknecht (1979), Cram (1976), Flowers et al. (1977), Hellebust (1976), Osmond (1979) and by Pitman and Cram (1977).
J A, Raven, F A, Smith, S E, Smith
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1980
For the purposes of this article, osmoregulation will be defined as the maintenance of approximately constant cell volume and turgor pressure in the face of changing water potential. Microorganisms must accomodate the entire range of environmental water potential whereas the range is narrowed for the cells of healthy higher plants and animals by ...
A D, Brown, M, Edgley
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For the purposes of this article, osmoregulation will be defined as the maintenance of approximately constant cell volume and turgor pressure in the face of changing water potential. Microorganisms must accomodate the entire range of environmental water potential whereas the range is narrowed for the cells of healthy higher plants and animals by ...
A D, Brown, M, Edgley
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Fish Physiology and Biochemistry, 2021
In most fish exhibiting external fertilization, spermatozoa become motile after release into water, triggered by differences between intracellular and extracellular conditions such as osmotic pressure, ion composition, and pH. The rapid change in osmolarity initiating spermatozoon motility induces osmotic pressure, resulting in active water movement ...
Fabio Herrera +2 more
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In most fish exhibiting external fertilization, spermatozoa become motile after release into water, triggered by differences between intracellular and extracellular conditions such as osmotic pressure, ion composition, and pH. The rapid change in osmolarity initiating spermatozoon motility induces osmotic pressure, resulting in active water movement ...
Fabio Herrera +2 more
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Thermodynamics and Osmoregulation
Nature, 1961DURING a recent meeting concerning renal function one of the speakers suggested that the reason for the high metabolic rate of the mammalian kidney might be further investigated since very little energy seems to be used in forming the urine. The allusion was to a computation by Borsook and Winegarten1 showing that the thermodynamic efficiency of the ...
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Molecular Biology of Osmoregulation
Science, 1984The drought of 1983 resulted in some 10 billion dollars in agricultural losses and has focused attention on the vulnerability of our major crops to this devastating form of environmental stress. This article is concerned with the molecular biology of a new class of genes, called osm (osmotic tolerance) genes, that ...
D, Le Rudulier +4 more
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Neurogenic disorders of osmoregulation
The American Journal of Medicine, 1982The osmolality of body fluids is normally maintained within a narrow range. This constancy is achieved largely via hypothalamic osmo-receptors that regulate thirst and arginine vasopressin, the antidiuretic hormone (ADH). Anything that interferes with the full expression of either osmoregulatory function exposes the patient to the hazards of abnormal ...
G L, Robertson, P, Aycinena, R L, Zerbe
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Osmoreceptors, Osmoreception, and Osmoregulation
Frontiers in Neuroendocrinology, 1994Mammals have evolved sophisticated behavioral and physiological responses to oppose changes in the osmolality of their extracellular fluid. The behavioral approach consists of regulating the intake of salt and water through changes in sodium appetite and thirst.
Bourque, Charles +2 more
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Biological Strategies for Osmoregulation
1980Green plants provide mankind with enormous quantities of food, fiber, oils, chemicals, and energy. Today there is great interest in increasing the productivity of the plant world, with plants, in essence, behaving as solar energy machines for capturing radiant energy and converting it into essential products. Unfortunately, one of the major barriers to
D W, Rains, R C, Valentine
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