Browsing by Author "Lotfi, Alireza"
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Item Effects of exposure to 50 hz electromagnetic fields during ıncubation on some of serum biochemical measures in newly-hatched chicks(Uludağ Üniversitesi, 2012) Lotfi, Alireza; Shahryar, Habib Aghdam; Rad, Mohammad NarimaniThe aim of present study was to determine the effect of intermitted exposure to 50 Hz, 0.5 mT electromagnetic fields (EMF) during different periods of incubation on serum biochemical parameters (glucose, total cholesterol, triglyceride, uric acid and iron concentration) in newly-hatched chicks. Experimental groups were: group 1 (control), with normal incubation process and without any exposing to EMF; group 2 included eggs exposed to 50Hz, 0.5 mT EMF, 2 h daily for 0-7 day of incubation; group 3 included eggs exposed for 2 h daily from day-8 to -14 of incubation; group 4; included eggs exposed from day-15 to -21 of incubation, and group 5 included eggs exposed from day-1 to -21 of incubation (whole incubation period). Incubation condition with exception to EMF exposing, was similar for all groups. At EMF exposure time, eggs were transferred to EMF emitter set and after exposure time, eggs were transferred to their rows (setter). Blood samples obtained from newly hatched chicks were analyzed. exposure to EMF: 50 Hz, 0.5 mT during embryonic life didn’t has considerable effect on total cholesterol, triglyceride, uric acid and Fe of newly hatched chicks. In present study, the only measure with significant changes was glucose concentration that had difference between group4 or 5 (exposed at 3rd or whole incubation period) and control group (P<0.05). It was concluded that exposure to EMF: 50 Hz, 0.5 mT during incubation with exception to glucose declining at late embryonic life (exposure at 3rd week), didn’t has any significant effect on plasma total cholesterol, triglyceride, iron or uric acid in hatched chicks.Item Possibilities of inclusion of saccharomyces cerevisiae as replacement for fish meal or poultry meat by-product in broiler chicken diet(Uludağ Üniversitesi, 2012) Shahryar, Habib Aghdam; Ahmadzadeh, Alireza; Lotfi, AlirezaThe aim of this experimental work was to evaluation of efficiency of dietary inclusion of SCY as replacement for fish meal or poultry meat by – product in broiler diet. A completely randomized design with five treatments, each with three replication of twelve chicks each was conducted from 7-49 day of age to investigate the effects of Saccharomyces cerevisiae yeast (SCY) as replacement with fish meal or poultry by – product protein on broiler performance. Treatments include: 1 control group 2 and 3: yeast in replace with 40 and 60 percent of fish meal protein 4and 5: yeast in replace with 40 and 60 percent of poultry by-product protein. Inclusion of SCY as fish meal replacement in two levels (treatment 2 or 3) didn’t have any negative effect on feed intake, weight gain or feed conversion ratio. Also dietary inclusion of SCY as replacement of poultry meat by-product (40% of poultry meat by-product proportion in diet) didn’t have any negative effect on performance. Only inclusion of 60% SCY as replacement for poultry meat by product had significant negative effect on performance includes feed intake, weight gain and feed conversion ratio (P<0.05).The results of this study indicated the use of SCY with 60 percent replacement of fish meal protein and poultry by-product protein can improve meat quality and broilers performance.Item Seasonal incidence of some economic bee diseases (Varroosis, Nosemosis and American Foulbrood) in honey bee colonies of Northwestern Iran(Uludağ Üniversitesi, 2011) Lotfi, Alireza; Shahryar, Habib AghdamThe aim of this review is to inform about the status of three economic bee diseases (Varroosis, Nosemosis and American foulbrood) in an important honey producing region, eastern Azerbaijan province (Northwestern Iran). These reports are based on colonies analysed for possible occurrence of these diseases. The major bee disease in the region is varroosis. Lowest rate of varroosis spread was in spring (7.72%) and it increases in the following seasons respectively and the highest rate was occurred in March (44%). Because of cold and semi-arid climate in northwestern Iran (such as eastern Azerbaijan province), Nosema apis has lower prevalence, but it can be hazardous at spring with about 59% incidence rate. About American foulbrood (AFB) 5.8% total infection rate was observed, AFB infection was started in May with highest incidence rate (17.3% of apiaries) and finished in July with 1%. With attention to these findings and reports of local veterinary organization, varroosis as the major bee disease in this region via impairing of bee population and stability in the colony, make susceptible conditions for secondary infection with Nosema apis at next spring.