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Articles by Ibtisam E.M. El Zubeir
Total Records ( 4 ) for Ibtisam E.M. El Zubeir
  Ibtisam E.M. El Zubeir , O.A.O. El Owni and G.E. Mohamed
  Milk and blood serum from forty five Friesian cows (15 healthy, 15 with subclinical mastitis and 15 with clinical mastitis) were used during the present study. Levels of micro minerals (Fe, Cu and Fe) were determined. The level of copper, iron and zinc in milk and blood serum of mastitis-infected cows (clinical and subclinical) and healthy cows were evaluated. When comparing healthy cows milk to those with subclinical mastitis, there was a significant decrease (p<0.05) in copper. Comparison between healthy and clinically infected cow`s milk samples revealed a significant increase (p<0.01) in zinc. Comparison of clinical and subclinical mastitis revealed a significant increase of copper (p<0.05). Blood serum samples from subclinically and clinically mastitis-infected cows showed a significant decrease (p<0.05) for zinc only.
  Lemya , M. Warsama , Ibtisam E.M. El Zubeir and O.A.O. El Owni
  Sanaa O. Yagoub , Fardous A. Bellow and Ibtisam E.M. El Zubeir
  The effect of incubation temperature and storage period on inoculated milk by Pseudomonas aeruginosa which well known as milk-spoilage microorganism was studied. Sterile milk sample were inoculated by 108-109 cfu mL-1 P. aeruginosa and stored at 0, 7, 12, 21, 37 and 45°C. The chemical analysis was conducted daily for all stored milk samples to investigate the effect of bacteria on milk constituents (fat%, protein% and acidity) and total bacterial count. The present results showed that milk which inoculated with P. aeruginosa and stored at different storage periods and temperatures, showed variations for fat, protein, acidity and bacterial count. Moreover, the inoculated milk samples showed a shelf life of 1-2 days at 37 and 21°C. However, the milk samples stored at 0, 7 and 12°C showed shelf life that ranged between 4-9 days. The present study concluded that the number of psychrotrophic bacteria significantly affected by both storage period and incubation temperature.
  M.S.A. Nour El Diam and Ibtisam E.M. El Zubeir
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