"Avian Medicine: Principles and Application"@cs . . . . . "11"^^ . "Brno"@cs . "Vladim\u00EDr"@cs . . . . "Z. et al."@cs . "1994"^^ . "Dr\u016Fbe\u017E \u2013 zdravotn\u00ED problematika velkochov\u016F"@cs . "38"^^ . "vitam\u00EDnem E"@cs . . "Praha"@cs . "3309"^^ . "216"^^ . . . . "623524"^^ . . "B.W. et al."@cs . . . . . "vitam\u00EDnu E"@cs . . "Ritchie"@cs . . . . . . "Vitam\u00EDn E u pt\u00E1k\u016F"@cs . "1384"^^ . "Diseases of Poultry"@cs . "2003"^^ . . . . . . "Florida, USA"@cs . "167"^^ . "0"^^ . . "SZN"@cs . "Saif"@cs . "Iowa State Press, Blackwell Publ. Comp."@cs . . "13237674"^^ . . "Ko\u017Eu\u0161n\u00EDk"@cs . "Jurajda"@cs . . "1231"^^ . . "80"^^ . "anglicky"@cs . "Vitam\u00EDny E (tokoferoly) p\u0159edstavuj\u00ED skupinu l\u00E1tek odvozen\u00FDch od z\u00E1kladn\u00ED struktury naz\u00FDvan\u00E9 tokol. Podle po\u010Dtu methylov\u00FDch skupin na chromanov\u00E9m j\u00E1dru se rozezn\u00E1v\u00E1 n\u011Bkolik tokoferol\u016F, ozna\u010Dovan\u00FDch p\u00EDsmeny \u0159eck\u00E9 abecedy, kter\u00E9 maj\u00ED rozd\u00EDlnou \u00FA\u010Dinnost. Biologicky nej\u00FA\u010Dinn\u011Bj\u0161\u00ED je \u03B1-tokoferol.V\u00FDznam tokoferolu u pt\u00E1k\u016F spo\u010D\u00EDv\u00E1 zejm\u00E9na v jeho nitrobun\u011B\u010Dn\u00E9m antioxida\u010Dn\u00EDm p\u016Fsoben\u00ED, synergismu s vitam\u00EDnem A a selenem i spolu\u00FA\u010Dasti v \u0159ad\u011B enzymatick\u00FDch proces\u016F."@cs . . . "Wingers Publ."@cs . "ES VFU Brno"@cs . "Y.M. et al"@cs . . . . . "Vitam\u00EDn E u pt\u00E1k\u016F"@cs . "Nemoci dr\u016Fbe\u017Ee a ptactva \u2013 metabolick\u00E9 poruchy, parazit\u00E1rn\u00ED infekce nemoci tr\u00E1vic\u00EDho \u00FAstroj\u00ED"@cs . "Ames, USA"@cs . "Vitam\u00EDny E (tokoferoly) p\u0159edstavuj\u00ED skupinu l\u00E1tek odvozen\u00FDch od z\u00E1kladn\u00ED struktury naz\u00FDvan\u00E9 tokol. Podle po\u010Dtu methylov\u00FDch skupin na chromanov\u00E9m j\u00E1dru se rozezn\u00E1v\u00E1 n\u011Bkolik tokoferol\u016F, ozna\u010Dovan\u00FDch p\u00EDsmeny \u0159eck\u00E9 abecedy, kter\u00E9 maj\u00ED rozd\u00EDlnou \u00FA\u010Dinnost. Biologicky nej\u00FA\u010Dinn\u011Bj\u0161\u00ED je \u03B1-tokoferol.V\u00FDznam tokoferolu u pt\u00E1k\u016F spo\u010D\u00EDv\u00E1 zejm\u00E9na v jeho nitrobun\u011B\u010Dn\u00E9m antioxida\u010Dn\u00EDm p\u016Fsoben\u00ED, synergismu s vitam\u00EDnem A a selenem i spolu\u00FA\u010Dasti v \u0159ad\u011B enzymatick\u00FDch proces\u016F. Je nezbytn\u00FD pro rozmno\u017Eov\u00E1n\u00ED, l\u00EDhnivost, norm\u00E1ln\u00ED v\u00FDvoj embry\u00ED a metabolismus tuk\u016F. P\u0159\u00EDdavek vitam\u00EDnu E do krmn\u00E9 d\u00E1vky zvy\u0161uje kvalitu dr\u016Fbe\u017E\u00EDho masa a stabilitu tuku. M\u00E1 v\u00FDznam pro metabolismus kyseliny nukleov\u00E9 a pro enzymatick\u00E9 pochody oxidoreduk\u010Dn\u00EDho syst\u00E9mu a p\u0159i dal\u0161\u00EDch procesech.Tokoferoly maj\u00ED olejovitou konzistenci, jejich estery jsou krystalick\u00E9 l\u00E1tky. Jsou neoby\u010Dejn\u011B st\u00E1l\u00E9 p\u0159i zah\u0159\u00EDv\u00E1n\u00ED za nep\u0159\u00EDtomnosti kysl\u00EDku. P\u016Fsoben\u00EDm oxida\u010Dn\u00EDch \u010Dinidel a vzdu\u0161n\u00E9ho kysl\u00EDku p\u0159ech\u00E1zej\u00ED na slou\u010Deniny chinonov\u00E9ho typu. Antioxida\u010Dn\u00ED \u00FA\u010Dinek vitam\u00EDn\u016F E souvis\u00ED s jejich schopnost\u00ED zabra\u0148ovat oxidaci jin\u00FDch organick\u00FDch l\u00E1tek - tuk\u016F, vitam\u00EDnu A, karoten\u016F, nenasycen\u00FDch mastn\u00FDch kyselin a skupin -SH.P\u0159\u00EDrodn\u00ED \u03B1-tokoferol (C29H50O2) se vyskytuje v D-form\u011B, kde\u017Eto syntetick\u00FD v DL-form\u011B. Prvn\u00ED z nich je o 36 % \u00FA\u010Dinn\u011Bj\u0161\u00ED ne\u017E DL forma. Vitam\u00EDn E je dob\u0159e rozpustn\u00FD v olej\u00EDch a nerozpustn\u00FD ve vod\u011B. Je odoln\u00FD proti teplu, je v\u0161ak velmi citliv\u00FD na p\u0159\u00EDtomnost alk\u00E1li\u00ED, oxida\u010Dn\u00EDch \u010Dinidel, kysl\u00EDku a ultrafialov\u00FDch paprsk\u016F. Mnohem stabiln\u011Bj\u0161\u00ED, zejm\u00E9na k oxidaci, jsou estery tokoferol\u016F, nap\u0159. tokoferolacet\u00E1t, kter\u00FDm se proto d\u00E1v\u00E1 p\u0159ednost p\u0159i p\u0159im\u00EDch\u00E1v\u00E1n\u00ED do krmn\u00FDch sm\u011Bs\u00ED."@cs . "1"^^ . "1979"^^ . .