. "3"^^ . "Z(MSM6007665809)" . . "Kroupov\u00E1, Hana" . . . "M\u00E1chov\u00E1, Jana" . "12610" . "Nitrite infuence on fish: a review" . "3"^^ . "[A536556C6F49]" . . . . "Dusitany jsou p\u0159irozenou sou\u010D\u00E1st\u00ED kolob\u011Bhu dus\u00EDku v p\u0159\u00EDrod\u011B. V p\u0159\u00EDrodn\u00EDch vod\u00E1ch dusitany mezi anorganick\u00FDmi formami dus\u00EDku nikdy nedominuj\u00ED, proto\u017Ee v oxick\u00FDch podm\u00EDnk\u00E1ch jsou rychle transformov\u00E1ny nitrifikac\u00ED na dusi\u010Dnany a v anoxick\u00FDch podm\u00EDnk\u00E1ch prob\u00EDh\u00E1 biologick\u00E1 denitrifikace na element\u00E1rn\u00ED dus\u00EDk, resp. N2O. Sladkovodn\u00ED ryby p\u0159ij\u00EDmaj\u00ED dusitany z vody aktivn\u011B na \u00FAkor chlorid\u016F, z toho d\u016Fvodu p\u0159edstavuj\u00ED zv\u00FD\u0161en\u00E9 koncentrace dusitan\u016F ve vod\u011B potenci\u00E1ln\u00ED probl\u00E9m. Toxick\u00FD vliv dusitan\u016F je dob\u0159e pops\u00E1n v literatu\u0159e a je zn\u00E1m i jejich vliv na n\u011Bkter\u00E9 fyziologick\u00E9 funkce ryb. Dusitany ovliv\u0148uj\u00ED nap\u0159\u00EDklad regulaci hladiny iont\u016F v t\u011Ble ryb, respira\u010Dn\u00ED procesy, kardiovaskul\u00E1rn\u00ED funkce, funkci \u017El\u00E1z s vnit\u0159n\u00ED sekrec\u00ED a funkce vym\u011B\u0161ovac\u00ED. Dusitany ale v prvn\u00ED \u0159ad\u011B zp\u016Fsobuj\u00ED oxidaci krevn\u00EDho barviva hemoglobinu na methemoglobin a t\u00EDm sni\u017Euj\u00ED kapacitu krve pro transport kysl\u00EDku. Toxicita dusitan\u016F je v\u00FDrazn\u011B ovlivn\u011Bna mnoha v nit\u0159n\u00EDmi i vn\u011Bj\u0161\u00EDmi faktory. Mezi nejd\u016Fle\u017Eit\u011Bj\u0161\u00ED faktory ovliv\u0148uj\u00EDc\u00ED toxicitu dusitan\u016F p"@cs . . . "Veterin\u00E1rn\u00ED medic\u00EDna" . "Svobodov\u00E1, Zde\u0148ka" . "RIV/60076658:12610/05:00006293" . "Nitrite infuence on fish: a review"@en . . . "Nitrite infuence on fish: a review" . . . . . "11" . "CZ - \u010Cesk\u00E1 republika" . "50" . . . "dusitany; ryby; mechanismus toxick\u00E9ho p\u016Fsoben\u00ED; vodn\u00ED prost\u0159ed\u00ED; fyziologick\u00E9 poruchy; kvalita vody; v\u011Bk; d\u00E9lka expozice"@en . "RIV/60076658:12610/05:00006293!RIV06-MSM-12610___" . "11"^^ . "461-471" . "Nitrite infuence on fish: a review"@en . "Vliv dusitan\u016F na ryby - p\u0159ehled"@cs . "Nitrite is an intermediate in the oxidation of ammonium to nitrate. An elevated ambient nitrite concentration is a potential problem for freshwater fish since nitrite is actively taken up across the gills in competition with chloride. Nitrite is a well-known toxicant for fish as well as a disrupter of multiple physiological functions including ion regulatory, respiratory, cardiovascular, endocrine and excretory processes. One critical consequence of nitrite accumulation is the oxidation of haemoglobin to methaemoglobin, compromising blood oxygen transport. Nitrite toxicity to fish varies considerably and depends on a large number of external and internal factors. Among the most important ones are water quality (e.g. pH, temperature, cation, anion and oxygen concentration), length of exposure, fish species, fish size and age, and individual fish susceptibility. Chloride concentration in water is considered one of the most important factors influencing nitrite toxicity to fish. The importance of individ"@en . "532888" . "Vliv dusitan\u016F na ryby - p\u0159ehled"@cs . . . . . "Nitrite is an intermediate in the oxidation of ammonium to nitrate. An elevated ambient nitrite concentration is a potential problem for freshwater fish since nitrite is actively taken up across the gills in competition with chloride. Nitrite is a well-known toxicant for fish as well as a disrupter of multiple physiological functions including ion regulatory, respiratory, cardiovascular, endocrine and excretory processes. One critical consequence of nitrite accumulation is the oxidation of haemoglobin to methaemoglobin, compromising blood oxygen transport. Nitrite toxicity to fish varies considerably and depends on a large number of external and internal factors. Among the most important ones are water quality (e.g. pH, temperature, cation, anion and oxygen concentration), length of exposure, fish species, fish size and age, and individual fish susceptibility. Chloride concentration in water is considered one of the most important factors influencing nitrite toxicity to fish. The importance of individ" . . "0375-8427" .