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Obsah polyaminů ve vybraných produktech
Popelková, Zuzana
The theoretical part of my thesis focuses on venison, its composition and effects and formation of polyamines in the body. The practical part deals with the content of polyamines (putrescine, spermidine, spermine) in roe deer, red deer and wild boar's ridge. Polyamines were determined by high performance liquid chromatogramy. The influence of the preservation method and the kind of venison was researched on the total amount of the polyamines and the contents of individual polyamines. The total amount of polyamines is decreased during storage in roe deer, red deer and wild boar. The highest concentrations were measured spermidine in roe deer and red deer, whether chilled or frozen meat. The boar ridge was found most spermine. Kind of venison did not affect the content of polyamines. Polyamines occurred about the same amount as in roe deer, red deer and boar meat.
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Obsah polyaminů ve vybraných produktech
Popelková, Zuzana
The theoretical part of my thesis focuses on venison, its composition and effects and formation of polyamines in the body. The practical part deals with the content of polyamines (putrescine, spermidine, spermine) in roe deer, red deer and wild boar's ridge. Polyamines were determined by high performance liquid chromatogramy. The influence of the preservation method and the kind of venison was researched on the total amount of the polyamines and the contents of individual polyamines. The total amount of polyamines is decreased during storage in roe deer, red deer and wild boar. The highest concentrations were measured spermidine in roe deer and red deer, whether chilled or frozen meat. The boar ridge was found most spermine. Kind of venison did not affect the content of polyamines. Polyamines occurred about the same amount as in roe deer, red deer and boar meat.
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Způsoby omračování jatečné drůbeže a jejich vliv na kvalitu masa
Popelková, Zuzana
Stunning renders poultry insensitive to pain allowing them to be killed by welfare. To stunning can be used electric, gas or mechanical methods of stunning. Electrical stunning of poultry is performed by passing electric current etiher cross the head (head -- only stunning) or through the whole body using water bath stunning supplied with high frequency currents. In both cases, the method involves the hanging up of live birds to overhead line, which has numerous negative aspects: poor animal welfare, considerable product damage and difficult working conditions. Gas stunning methods used for poultry are controlled atmosphere stunning and low atmosphere pressure stunning. Both methods improve welfare at slaughter and quality of carcass and meat. The main disadvantage of gas stunning compared with electrical stunning are high operating costs and complicated installation. In general, the mechanical captive bolt stunning is often used to kill injured poultry, but it can be used on a small scale to larger poultry such as ducks, geese and turkeys. And in some countries and cultures, stunning is not an issue anyway. In these countries like in the Middle East region, birds are slaughtered kosher/halal according to the Jewish/Islamic law without stunning.
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