تأثير طريقة التعبئة في بعض الصفات الكيميائية النوعية لدهن الآلية و تحت الجلد لذكور الأغنام المخزن بالتجميد

Abstract EN

This study was conducted on tail tallow and subcutaneous tallow of the male awasi sheep at the age 10-12 month .

Two methods were used for packaging ( polyethylene bags and plastic containers ) were freeze storage at a temperature of -18 °c ± 2 °c for 90 days .

It was estimated some chemical tests of quality were , peroxide value , thiobarbituric acid , the percentage of free fatty acids and the percentage of volatile fatty acids of fresh and frozen samples .

This 4 tests were done , because of their importance during storage period .

These tests were carried out every 30 days.

Peroxide value , increased during the period of storage freeze and per treatments compared to treatments fresh where it was noted that the lower increase in the end of the storage period was when the treatment of subcutaneous tallow using packing sacks , amounting to 6.25 and the largest increase in the end of the storage period was when the treatment of tail tallow using packing containers , amounting to 7.55 .

thiobarbituric acid , increased during the period of the freeze storage and reached its lowest value 1.16 in the treatment of subcutaneous tallow using packing sacks .

The percentage of free fatty acids , less increase them at the end of the storage period was when the treatment of subcutaneous tallow using a packing sacks , amounting to 0.800 .

Either the percentage of volatile fatty acids were less increase and reached her at the end of the period of storage at 0.290 tallow treatment of subcutaneous using a packing sacks .

From all this we can say that less increase for the previous tests were treated at the use of polyethylene sacks in the packaging of subcutaneous tallow the biggest increase was at the treatment of the use of cans in the packaging for tail .

Finally conclude from these results that the best packaging in bags of packing containers , as well as the subcutaneous tallow changes occurred by the less quality compared to tail tallow during freezing storage.