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The studies were conducted in year 2003 on 5-6 year-old animals from private farms, located in the south-eastern part of Poland. The material for analyses consisted of 30 samples of storage (subcutaneous) fat and 30 samples of liver. The concentration of polychlorinated biphenyls (PC Bs) amounted to a mean of 0.0201 mg/kg fat, while individual values ranged from undetectable quantities to 0.077 mg/kg. The dominating compound (present in all the fat samples) proved to be p.p”-dichlorodiphenylene (p,p'DDE), the content of which ranged from 0.002 to 0.037 mgkg fat. No organophosphorus pesticides were found in liver samples.
The paper had the objective of determining the physicochemical parameters of colt meat during a five-day long cold storage, tantamount to its turnover period to, or time of its reaching, the western-European countries. Samples of the longest dorsal muscle from 29 colts 1.5-2 years old, from commercial breeding were investigated. Colt meat is characterized by high content of water and protein and low content of fat. That meat requires a longer period for ‘maturing’ and, with its value pH, indicates a potential for storage in cold condition for at least five days. Moreover, a five day maturing of colt meat in cold storage raises its water holding capacity, usability for processing and improves meat tenderness, as well as causes a dramatic darkening of meat color.
The objective of this paper was to determine the effect of cold-storage time (in frozen condition) on selected physical and chemical characteristics of horsemeat and fat. Samples of the longest dorsal muscle and nape fat from horse carcasses were tested. Two time periods of I and 3 months were applied as a comparative criterion for meat and fat. The research was performed on 26 carcasses of adult horses (8-10 years old). It has been shown that the frozen storage process causes darkening of meat color as well as reduces the meat capacity to bind and retain water. Moreover, the frozen storage improves the meat tenderness. With the time of cold storage the peroxide value and acid number were observed to rise as the evidence of oxidizing and hydrolytic processes taken place in horse fat.
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