Abstract: A feeding trial was conducted to investigate the effect
of periodically use of garlic on performance and carcass
characteristics in broiler chickens. 240 1-day-old Ross broiler chicks
randomly allocated into the 10 dietary treatments (A, B, C, D, E, F,
G, H, I and J) for 6 wk. Treatment A or control group, received basal
diet (based on standards of Ross management guidelines) without
supplementation of garlic powder while B, C and D dietary
treatments were basal diet supplemented with 0.5, 1 and 3% garlic
powder, respectively for the whole time of experiment (6 weeks).
Birds in group E, F and G were fed control diet supplemented with
0.5, 1 and 3% garlic powder, respectively just in their starter diet (0-
21d). Birds in three other treatments (H, I and J) received control diet
for the first 21 days and 0.5, 1 and 3% of garlic powder was added to
their finisher diets, respectively. 1 and 3% supplemented groups in
finisher period had better performance as compared with other
groups. Since present study conducted in optimum and antiseptic
conditions, it seems that better or more responses could be expected
in performance if the raising conditions would not be healthy.
Abstract: In this work, study the location of interface in a stirred vessel with Rushton impeller by computational fluid dynamic was presented. To modeling rotating the impeller, sliding mesh (SM) technique was used and standard k-ε model was selected for turbulence closure. Mean tangential, radial and axial velocities and also turbulent kinetic energy (k) and turbulent dissipation rate (ε) in various points of tank was investigated. Results show sensitivity of system to location of interface and radius of 7 to 10cm for interface in the vessel with existence characteristics cause to increase the accuracy of simulation.