Scientific papers details

  • Effect of Storage Temperature on Weight Loss, Chemical Composition, Microbiological
  • year : 2009
  • How to cite : , 2009 , 5 (4) ,pp: 498-505
  • Abstract : Effect of storage temperature on weight loss, chemical composition, microbiological properties and sensory characteristics was studied. The cheese was made from fresh raw cows milk with 6 % salt kept in ant-acid containers with its whey and stored at room (35-37C) and refrigerator (7C) temperatures for periods of 0, 60, 120, 180 and 240 days. Weight loss, chemical, microbiological and sensory characteristics were determined after each period. Storage temperature significantly (P<0.05) affected weight loss and chemical composition of the cheese. Weight loss, titratable acidity, total solids, crude protein and fat contents of the cheese samples stored at room temperature (35-37c ) were significantly (P<0.001) higher than those kept at refrigerator (7c). Soluble proteins and ash contents of the samples stored at refrigerator were significantly (P<0.001) higher than those kept at room temperature. Volatile fatty acids, tyrosine and tryptophane contents were higher in cheese samples stored at room temperature. Total bacterial count of the cheese stored at room temperature was lower than those stored at refrigerator at the end of storage period. Coliforms and E. coli counts were not detected at day 60 for the cheese samples stored at room temperature. Staphylococcus aureus was completely disappeared at day 60 and through out the storage. Moulds and yeasts were found to decrease in number in cheese stored at refrigerator and they disappeared in samples kept at room temperature at day 120. Color and texture of the cheese stored at refrigerator had higher scores than that kept at room temperature. The flavor and saltiness of the cheese samples were not affected by the storage temperature. Weight loss, chemical composition, microbial contents and sensory characteristics (ripening indices) of Gibna Bayda were significantly (P<0.001)affected by storage temperature. Storage of Gibna Bayda samples at room temperature decreased colifor
  • Author :
  • Osman A.O. El Owni
  • Omer I. A. Hamed
  • References :

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