|
|
Ovlivnění jakostních parametrů drůbežího masa netradičními krmivy
Voborná, Veronika
This bachelor thesis concerns with the effect of non-traditional feeds on the quality parameters of poultry meat. At this time, they are looking for non-traditional feeds, which could improve the quality of poultry meat or reduce overall price of feed. According to physical qualities, the poultry meat differ in pH, drip loss and shear force due to non-traditional feeds. Drip loss reduces adding Ligustrum lucidum, broccoli or Echinacea purpurea to the diet. Shear force of poultry meat reduces adding garlic bulb or garlic husk to the feed. Nutritional value of poultry meat differ in content of fat, cholesterol, proteins and minerals. Content of minerals increases adding guar korma meal and sugar syrup. Sensory properties differ especially in lightness of poultry meat, also in tenderness, juiciness, taste and flavour. From the technological properties differ water-holding capacity of poultry meat, which increases adding Echinacea purpurea to the diet.
|
|
|
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.
|
|
| |
|
| |
guest ::
