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The research was conducted to study the effect of heat stress on blood parameters in indigenous sheep. Nine sheep were divided into three groups which were almost similar in age, sex and weight. Three groups were divided as zero hour (T0), four hours (T4) and eight hours (T8) heat exposure to direct sunlight. During experimental period temperature–humidity index (THI) value was calculated as 27.09 which indicate T4 and T8 groups were subjected to heat stress condition for at least four hours and eight hours respectively every day. The amount of red blood cell (RBC), hemoglobin (Hb%) and packed cell volume (PCV%) were increased significantly (p<0.05) with the increase of heat stress but the amount of white blood cell (WBC) had no significant difference (P>0.05) among the treatment groups. It can be concluded that heat stress had significant changes on some blood parameters in indigenous sheep. DOI: http://dx.doi.org/10.3329/jbau.v12i1.21253 J. Bangladesh Agril. Univ. 12(1): 91-94, June 2014

A number of composite propellant compositions based on various burn rate suppressants were formulated and studied with the aim to select a suitable burn rate suppressant for reducing the burn rate of the basic propellant composition. Theoretical properties of the compositions were computed by using NASA CEC-71 program and the burn rate performance was evaluated. In addition, sensitivity, thermal, and mechanical properties of the compositions were also evaluated. The composition containing 60% AP, 10% Al, 20% binder, and 10% burn rate suppressant (melamine) was insensitive to friction and impact (28.8 kg and 0.56 m) and showed 90% weight loss. The formulation was found to be relatively superior.

Meat production depends on several environmental factors and management practices. Meat animal carcasses vary in composition through genetic, age and sex of animal, nutritional, and environmental effects. Carcass composition of various species differs considerably in terms of carcass weight, percentages of fat, muscle and bone. As animals become older and heavier the proportion of fat in their carcasses increases and the proportion of muscles and bones decreases. Uncastrated male animals produce carcasses with more muscle than do castrated males. At a particular fat level the value of a carcass is influenced by the muscle: bone ratio. A higher ratio is obviously better since it equates to more saleable lean meat as well as better carcass conformation. Beef breeds have a higher ratio than dairy breeds and entire males have a higher ratio than castrates. Several factors within control of livestock producers may be manipulated to achieve desirable effects in carcass.