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Articles by Devrim Beyaz
Total Records ( 2 ) for Devrim Beyaz
  Ozcan Cengiz , Bekir Hakan Koksal , Orcun Yagin , Asli Sultan Bakirci , Devrim Beyaz , Sadik Buyukyoruk and Ahmet Gokhan Onol
  A trial was conducted to investigate the effects of a dietary prebiotic for a period of 14 d on the intestinal microflora, Dry Matter (DM) and Organic Matter (OM) digestibility and growth performance of male broiler chicks Delayed to Feed Access (DFA) after hatch. One hundred forty four 1-d-old broiler chicks (ROSS 308) were randomly distributed into 6 groups with 8 replicate pens having 3 birds in each. A 2 x 3 factorial design was implemented. Six experimental groups were formed by two levels of dietary prebiotic supplementation (Control and Agrimos®, 1 kg/ton) and three periods of DFA (0-, 24- and 48- h). Depending on the time interval between arrival to the experimental site and feeding, holding chicks prior to free access to water and feed had a negative impact (p<0.001) on the body weight. At the end of the trial, these differences remained significant for body weight (p<0.05) and feed consumption (p<0.001) of chicks with DFA. DM digestibility reduced significantly (p<0.05) in birds exposed to 24- and 48-hour delay prior to feeding. A significant decrease (6.2 vs. 5.5 log10cfu/g) in Enterobacteriaceae (p<0.01) and increase (5.5 vs. 5.9 log10cfu/g) in Lactobacilli count was noted in prebiotic supplemented groups on d 7. Dietary prebiotic supplementation improved DM (p<0.05) and OM (p<0.05) digestibility significantly. Relative weight of intestine was reduced (p<0.05) in birds fasted for 24- and 48-h after hatch. Overall, dietary prebiotic supplementation helped broiler chicks to develop a healthier intestinal microflora and this may, in turn, inhibit the DFA resulted decrease of dry matter digestibility in early growing period. However, prebiotic inclusion to broiler diets may not be a protective management practice in preventing DFA-related growth depression of broiler chickens.
  Devrim Beyaz and Mustafa Tayar
  This study was conducted to decontaminate sheep carcasses by spraying lactic acid solutions in two different concentrations (1 and 2%). The microbiological quality of carcasses and the effects of lactic acid spraying after slaughter and one day cold storage were determined. Commercial lactic acid solutions (1 and 2%) were sprayed to the sheep carcasses for 30 sec just before cold storage in a commercial slaughterhouse belonged to a private company located in Bursa. Sampling was carried out 30 min after spraying and after 24 h cold storage. A total of 400 samples were examined for Total Viable Count (TVC), the number of coliforms and Escherichia coli. A total of 1.57, 2.69 and 2.06 log cfu cm-2 reductions in the numbers of TVC, the number of coliforms and E. coli were obtained when 1% lactic acid concentration was applied. The reduction rates for these microorganisms were 1.77, 2.98 and 2.23 log cfu cm-2, respectively when 2% lactic acid was applied. Following a 24 h cold storage the TVC, the number of coliforms and E. coli numbers reduced 1.30, 2.16 and 1.59 log cfu cm-2 in the 1% lactic acid treated samples when compared with untreated control samples. The reductions in the numbers of TVC, the number of coliforms and E. coli in 2% lactic acid treated samples after 24 h of cold storage were 1.67, 2.31 and 1.76 log cfu cm-2, respectively. As a result, application of 2% lactic acid was more effective than 1% lactic acid application on the microorganisms investigated. It could be suggested that 2% lactic acid application with proper hygiene and handling procedures could provide safer meat/meat products.
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