Judul: Karakteristik fisik daging sapi dara brahman cross dengan pemberian jenis konsentrat yang berbeda
Abstrak: This experiment was conducted to know physical characteristics of Brahman Cross heifer’s beef at different type of concentrate. Nine heads of Brahman Cross heifers (1.5-2 year of age) with initial weight of 330±26.93 kg and the final weight of 357±26.82 kg were used. They were devided into three groups subjected to three dietary treatment. P1 treatment concentrate with 11% of crude protein (CP) and 70.42% of Total Digestible Nutrient (TDN), P2 treatment concentrate with 13.03% of CP and 70% of TDN, and then P3 treatment concentrate with 16% of CP and 65% of TDN. The observation of fattening was done for 60 days (2 month). The data were analyzed by analysis variance based on general linear model procedure and Tukey test. The measurement of meat quality was included : value of pH, shearforce, cooking loss, water holding capacity, meat colour and marbling score. The value of pH P1 5,82±0,05 has a significantly higher result than P2 and P3 with 5,62±0,02; 5,60±0,03, the shearforce of P2 8,79±0,07 which was significantly higher than P1 and P3 which were 7,26±0,10; 7,33±0,26, the cooking loss were significantly different in each treatment of P1, P2, and P3, they are 37,23±0,09; 40,21±0,78; 44,04±0,66 respectively, the water holding capacity of P1 25,54±0,93 were significantly lower than P2 and P3, there are 30,67±0,23;31,50±1,24 respectively, while marbling measurement and meat colour were analyzed by using descriptive test with each of average value 1,33±0,5 and 5,33±0,5. Physical characteristics of Brahman Cross heifer’s beef in the range of normal meat.
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Judul: Penampilan bobot badan, pertambahan bobot badan dan karkas sapi brahman cross heifer dengan pemberian konsentrat yang berbeda
Abstrak: Beef cattle production in Indonesia can not meet the huge demand for beef. Increased consumption of beef in Indonesia must be balanced with the addition of an adequate production is by way of an increase in beef cattle population. Calves that are kept by the fattening of beef cattle industry in Indonesia generally come from Australia, for example, Brahman Cross cattle (BX). Given the stock price and the lack of beef steer at the time, then to overcome them been procured Heifer cows that have a fairly good quality with a cheaper price than the price of steer beef. This study aimed to study the appearance of body weight, body weight gain and carcass Heifer Brahman Cross cattle by administering different concentrtioans, the number of samples used as much as nine calves. Data obtained in this study treated descriptively. The mean, standard deviation and coefficient of variation was calculated using the formula Walpole (1992). With the treatment of three different types of concentrates. Variables observed in this study is the final weight, body weight gain, carcass weight, carcass percentage, meat percentage of carcass weight and carcass percentage of final weight. The results obtained in this study is the final weight of P1 (325.30±10.90) is relatively lower than P2 and P3 respectively (380.30±16,20; 365,66±7.47), of accretion P3 body weight (0.18±0.11) is relatively lower than P1 and P2 respectively (0.43±0,04; 0,79±0.11), carcass weight P1 (153.97±5.05) was relatively lower than P2 and P3 is (168.30±9.96; 173.30±1.91), percentage of carcass P2(43.70±1.18) was relatively lower than P1 andP3 is (47.33±0.51; 47.40±0.45), meat percentage of carcass weight P2 (62.90±1.82) is relatively lower than the P3 P1dan (63.50±1.30; 63.40±1.39), percentage of meat to cutting the weight of P2 (27.48±0.30) was relatively lower than P1 and P3 is (30.06±0.96; 30.42±0.40) , feed intake assessment conducted by a descriptive test with the amountof each P1, P2 and P2 is (7.42; 7.99; 7.38). Overall response Cross Heifer Brahman cattle on feed P2 feed tend to be better than the P1 and P3.
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Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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