ISSN:
1750-3841
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Three Suffolk (Ovis aries) castrate male animals (wethers) were used in this study. Following exsanguination, chilling and primal/subprimal processing, samples were taken from the subcutaneous adipose tissue (Punniculus adiposus) covering the thoraco-lumbar area, and randomly allotted to three low temperature (-29°C) storage treatments (0, 5 and 10 months). During the analyses, each sample was further separated and subjected to three heat/preparation treatments: cooked (163°C) tissue (CT), cooked (163°C) fat (CF), melted (50°C) fat (MF). Carbonyl analyses of each sample were conducted on hexane extracts passed over Celite impregnated with 2,4-DNPH to convert the carbonyls to their 2,4-DNPH derivatives. The monocarbonyl derivatives were eluted from the total carbonyls and were further fractionated into classes. The results indicated that after 5 months of storage the amount of total carbonyls was reduced by 52%, and after 10 months the amount present was only 21%. However, most of the monocarbonyls were present in greater amounts at 5 months than initially or after storage for 10 months. Generally, cooking was observed to increase the amount of all carbonyls present. In fact, alk-2,4-dienals were only detected in the cooked samples. Of the monocarbonyls usually detected in the various samples, the alk-2-ones and alkanals were the predominant classes.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2621.1978.tb02495.x
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