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Articles by S. Hosseini
Total Records ( 5 ) for S. Hosseini
  S. Hosseini , J. Arshami and M.E. Torshizi
  The aim of this study was to evaluate the effects of graded Cu and Zn on immune system. A total of 360 day-old broilers were distributed into 9 treatments with 4 replicates using CRD design (3x3 factorial). Chicks for 42 days received Cu (35, 70, 105 mg kg-1 diet) and Zn (40, 80, 120 mg kg-1 diet). On days 8, 12 and 15, chicks were vaccinated against Newcastle Disease Virus (NDV), Infectious Bronchitis Virus (IBV) and Infectious Bursal Disease (IBD), respectively. Two chicks from each pen were bled on days 6 and 12 after vaccinations and collected sera were used in Hemaglutination Inhibition Test for NDV and ELISA test for IBV and IBD. On day 42, one bird from each pen was bled for counting leukocytes. Data analysis showed no significant interaction between graded Cu and zinc. The main effect means of titers increased by Cu at 105 ppm for NDV (day 12), IBV (days 6 and 12) and IBD (days 6 and 12). Zinc at 120 ppm slightly improved titers of NDV (day 6), IBV (day 6) and IBD (day 12). Graded Cu significantly enhanced number of heterophils and ratio of heterophil to lymphocyte (H:L), but reduced number of lymphocytes (p<0.05). Conversely, graded Zn significantly decreased H:L (p<0.05), but increased lymphocytes and monocytes and decreased heterophils. In conclusion, supplementations of Cu and Zn promoted immune system in broilers.
  J. Arshami , S. Hosseini and M.E. Torshizi
  A total of 400 pieces of day-old male broiler chicks were distributed into 9 treatments and one control diet with 4 replicates using a CRD design (3x3 factorial). Chicks for 42 days received graded levels of Cu (35, 70, 105 mg kg-1 diet) and Zn (40, 80, 120 mg kg-1 diet) in their diets (free of Cu and Zn mineral premix) to determine the antibody titer of SRBC and the weights of lymphoid organs (BW%) including: Thymus (TW), Bursa (BW), Spleen (SW) and Liver (LW). On days 28 and 35, two birds from each pen received SRBC (1 mL, 10%) injections and were bled 7 days after each inoculation to evaluate the primary and secondary responses for Total Immunoglobulin (TIg), Immunoglobulin M (IgM) and Immunoglobulin Y (IgY). On day 42, two birds from each pen were slaughtered to weigh the lymphoid organs. Since analysis of data showed no significant interaction between graded Cu and zinc, only the main effect of means were considered. The graded Cu increased titers of TIg and IgY linearly but reduced IgM titer quadratically in primary response. In secondary response, the titers of TIg and IgM decreased, but IgY increased quadratically. The graded Zn increased TIg and decreased IgM titers quadratically but the titer of IgY increased linearly in primary response. In secondary response, the graded Zn increased IgM titer but decreased TIg and IgY titers quadratically. The graded Cu enhanced TW and SW linearly but BW and LW (p<0.05) quadratically. The graded Zn increased TW and decreased BW linearly but decreased SW and LW quadratically. Overall results indicated that adding Cu at 70-105 ppm and Zn at 80-120 ppm improved SRBC titers and weights of lymphoid organs. In conclusion, adding Cu and Zn at recommended levels can be useful as immunomodulators in broiler chicks.
  S. Hosseini , J. Arshami and M.E. Torshizi
  A total of 400 pieces of 1 day old male broiler chicks were distributed into 9 treatments and 1 control diet with 4 replicates using a CRD design (3x3 factorial). Chicks for 42 days received graded levels of Cu (35, 70, 105 mg kg-1 diet) and Zn (40, 80, 120 mg kg-1 diet) in their diets (free of Cu and Zn mineral premix) to determine the antibody titer of SRBC and the weights of lymphoid organs (%BW) including: Thymus (TW), Bursa (BW), Spleen (SW) and Liver (LW). On days 28 and 35, two birds from each pen received SRBC (1 mL, 10%) injections and were bled 7 days after each inoculation to evaluate the primary and secondary responses for Total Immunoglobulin (TIg), Immunoglobulin M (IgM) and Immunoglobulin Y (IgY). On day 42, two birds from each pen were slaughtered to weigh the lymphoid organs. Since analysis of data showed no significant interaction between graded Cu and zinc, only the main effect of means were considered. The graded Cu increased titers of TIg and IgY linearly but reduced IgM titer quadratically in primary response. In secondary response, the titers of TIg and IgM decreased but IgY increased quadratically. The graded Zn increased TIg and decreased IgM titers quadratically but the titer of IgY increased linearly in primary response. In secondary response, the graded Zn increased IgM titer but decreased TIg and IgY titers quadratically. The graded Cu enhanced TW and SW linearly but BW and LW (p<0.05) quadratically. The graded Zn increased TW and decreased BW linearly but decreased SW and LW quadratically. Overall results indicated that adding Cu at 70-105 ppm and Zn at 80-120 ppm improved SRBC titers and weights of lymphoid organs. In conclusion, adding Cu and Zn at recommended levels may be useful as immunomodulators in broiler chicks.
  S. Hosseini , M. Ghorbani , M. Torshizi and N. Zargham
  This study investigated how the appropriate environmental policy may change during a long-term macroeconomic planning and under different policy weights. For this purpose, a simple general equilibrium model has been established. Results showed that choosing the appropriate policy is depend on preferences of government; so that when weight of environmental factors in policy making is less than 40% (weight of economic factors is more than 60%), lowland food production subsidies policy is preferable policy and when weight of environmental factors is more than 40%, upland food production tax policy is appropriate policy. Base on results of this study, as the weight of environmental and economic factors changed in this study, one can think about changing the weight of any of economic factors. For example, if PPI doesn`t have any importance in policy making, it can be eliminated and if government wants to give more attention to consumer prices than producer prices, policy maker can set the weight of CPI more than that of PPI in ranking.
  N.H. Jazani , M. Zartoshti , H. Babazadeh , N. Ali-daiee , S. Zarrin and S. Hosseini
  The aim of the present study was the evaluation of the antibacterial activity of Fennel essential oil on isolates of Acinetobacter baumannii. Forty eight isolates were collected from clinical specimens from burn wards of hospitals in Tehran, Iran between April and September, 2006. The susceptibility of isolates was determined using a broth microdilution method. Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) of isolates to Fennel essential oil were determined. The susceptibilities of isolates to different antibiotics were tested using agar disk diffusion method. The rates of resistance were determined to antibiotics as follows: cefazolin 100%, ciprofloxacin 100%, ofloxacin 95.8%, kanamycin 95.8%, carbenicillin 93.7%, ticarcillin 93.7%, piperacillin 88.9%, co-trimoxazole 79.1%, ceftizoxime 75%, gentamicin 70.8%, cefalotin 60.4%, amikacin 52% and imipenem 14.6%. Fennel essential oil possessed antibacterial effect against all isolates of A. baumannii. These results suggest the potential use of the Fennel essential oil for the control of multi-drug resistant A. baumannii infections. However, more adequate studies must be carried out to verify the possibility of using it for fighting bacterial infections in human.
 
 
 
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