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  • 1
    Digitale Medien
    Digitale Medien
    Electrophysiological abnormalities produced by ammonium in isolated perfused brook trout, Salvelinus fontinalis, hearts (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 28 (1986), S. 0 
    Details
    ISSN: 1095-8649
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Electrocardiographic (ECG) abnormalities and arrhythmias have been observed in hyperammonemic patients and in animals injected with ammonium salts. Ammonium is excreted directly into the environment by fish, and it is a potent fish toxin, but the effects of ammonium on the cardiovascular system of fish are unknown. This study investigated the cardiotoxic effects of ammonium on isolated perfused fish hearts. These were compared with ammonium-induced cardiac electrophysiological abnormalities observed in humans and other experimental animals. Isolated perfused fish hearts exhibit ammonium-induced cardiac abnormalities similar to the ammonium-induced abnormalities seen in the hearts of higher vertebrates. Therefore, we conclude that the myocardium of ammonotelic species does not possess a specialized ammonium detoxification mechanism, and that ammonium is cardiotoxic to salmonid fish.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1095-8649.1986.tb05140.x
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  • 2
    Digitale Medien
    Digitale Medien
    Relationship of environmental pCO2 to selected blood parameters of Oncorhynchus kisutch (Walbaum) (1979)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 15 (1979), S. 0 
    Details
    ISSN: 1095-8649
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Blood samples from sub-adult coho salmon (Oncorhynchus kisutch) were correlated with environmental conditions. Carbon dioxide tensions, pH and bicarbonate levels were determined in the blood for fish acclimated to environmental pCO2 levels of 2.49 and 2.74 mmHg. Fish were removed from the high pCO2 environment and placed in one with a low pCO2. Their blood pH and pCO2 were monitored during the course of acclimation. After 27 days of acclimation to a low pCO2 environment, a group of fish was sampled and compared to a group of fish acclimated to a high pCO2 environment. It was found that pCO2 in the environment affects the rate of diffusion of carbon dioxide from the blood to the water. Under the environmental conditions prescribed in these experiments no significant change in bicarbonate was noticed. It is postulated that a bicarbonate chloride exchange is not a major pathway for the removal of carbon dioxide from the blood of O. kisutch.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1095-8649.1979.tb03615.x
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  • 3
    Digitale Medien
    Digitale Medien
    Opioid Receptors on Murine Splenocytes (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 540 (1988), S. 0 
    Details
    ISSN: 1749-6632
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1749-6632.1988.tb27215.x
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