Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 14

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  zawartosc nitrozoamin
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
The aim of the study was to determine the influence that the species and sex of wild game, their feed, and living conditions and season of the year have on nitrosamine content: both dimethylonitrosamines (DMNA) and diethylonitrosamines (DENA) in raw meat and meat that has been frozen and subsequently thawed. The study was conducted on meat from three types and eight species of game, killed-culled at various different periods during the hunting season. Average nitrosamine content between DMNA 6.46 to 8.60 µg/kg and DENA 6.73 to 8.37 µg/kg was determined in the investigated meat samples. The results of the study indicate the occurrence of nitrosamine contamination and considerable variations in its levels (DMNA) and (DENA) in raw game meat of particular species, as well as the influence of freezing and thawing processes on diminishing the value of its content.
The aim of this study was the examination of what influence on the nitrozamines’ concentration in beef meat have the pasteurisation and combination of pasteurisation and the functional additives most often applied at industrial practice, such as: sodium chloride, sodium nitrite, polyphosphates, and sodium ascorbites. The nitrozamines (dimethyl-nitrozamine DMNA, diethyl-nitrozamine DENA) were extracted from the samples, distillated, concentrated under vacuum, and characterised throug gas chromatography using the Pancholy method. The results of the study demonstrate that the effective intensity of functional additives on volatile nitrozamines is related to the nitrite presence in the brine. A strong destructive activity of sodium ascorbite and sodium chloride against nitrozamines was determined, and a catalytic activity of polyphosphates in nitrozamines formation. The destructive activity of sodium ascorbate against nitrozamines formation was stronger than that of sodium chloride. The intensity of the activities of the technological additives is related to the sodium nitrite presence in the brine. When brine contains the nitrites, the destructive activity of sodium ascorbite and sodium chloride is smaller. Additionally, a strong destructive action of the pasteurisation treatment against nitrozamines was observed.
The aim of this study was to determine the influence of freezing and the most often used functional additives such as: sodium chloride, sodium nitrite, polyphosphates, and sodium ascorbateon in the nitrozamine content in cured pork and beef. The nitrozamines (dimethylnitrozamine DMNA, diethyl-nitrozamine DENA) were extracted from raw material, distilled concentrated in a vacuum and determined by gas chromatography according to the Pancholy method. The study showed that the addition of sodium chloride in the form of brine to meat caused a decrease in the content of short chain nitrozamines, i.e.: DMNA and DENA. During the curing of meat with nitrite the content of the nitrozamine increased as compared to the raw meat without additives. The concentration of the nitrozamines in meat can be significantly reduced through the addition of sodium ascorbate. The freezing itself has little influence on the nitrozamine content in meat.
The goal of the study was to determine the influence of baking, smoking and baking, as well as the most frequently used functional additives, such as sodium chloride, nitrite, polyphosphates and sodium ascorbate on the amount of nitrosamines in pork-loin meat. Nitrosamines (dimethyl-nitrosamine DMNA, diethyl-nitro- samine DENA) were extracted and distilled from raw meat and then concentrated in a vacuum and determined by gas chromatography by means of Pancholy’s method. The investigations revealed a clear influence of smoking on an increase of the nitrosamines in pork loin, and the effect of baking on their decrease. An addition of sodium nitrite as brine to the meat caused a decrease in nitrosamine contents as compared to meat without additives. Meat curing with nitrate considerably increased its level of short-chain nitrosamines, i.e. DMNA and DENA. Nitrosamine contents in cured meat may be decreased by an addition of sodium ascorbate to the brine.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.