Judul: Persentase karkas, potongan komersial serta kandungan kolesterol karkas ayam broiler yang diberi tepung daun salam (Syzygium polyanthum Wight) dalam ransum
Abstrak: Diarrhea is one of diseases in broiler chicken and a antibiotics are usually needed to cure the disease. However. there are many risks caused by the use of antibiotic in poultry industries for human health. The risks are teratogenic effect, carcinogenic effect, mutagenic effect and resistence to the antibiotics. Therefore the use of antibiotics need to be substituted by natural antimicrobes. One of the natural antimicrobes is bay leaves, which contains volatile oil, tannin, flavonoid, eugenol. This research \\.as conducted to study the effect of bay leaves powder addition in the diets on carcass percentage, carcass commercial cut and carcass cholesterol of the broiler using completely randomized design ulth six treatments and three replications. The research used 180 DOC (Day Old Chicken). The treatment diets were : RO (negative control): R1 (positif control), R2 (1 % bay leaves powder), R3 (2 % bay leaves powder), R4 (3% bay leaves leaves powder), R5 (antibiotic). The data were analyzed using analyses of variance and any significant difference were fixher tested by Duncan test. The result showed that the treatment diets did not significantly increase carcass percentage, carcass .commercial cut percentage, the treatment significantly decreased carcass cholesterol level, also decreased colony of E. coli in the broiler excreta on age 13 days and 35 days.
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Judul: Persentase Berat Karkas, Organ Dalam dan Lemak Abdominal Ayam Broiler yang Diberi Antibiotik Zinc Bacitracin, Probiotik Bacillus sp. dan Saccharomyces cerevisiae dalam Ransumnya
Abstrak: Pemberian probiotik yang merupakan zat tambahan pada pakan ayam broiler diharapkan dapat meningkatkan pertambaban berat badan dan efisiensi penggunaan ransum. Dewasa ini para peternak dan konsumen lebih menghendaki berat badan yang tinggi dengan nilai konversi ransum yang rendah serta karkas berkualitas baik. Penelitian ini dilakukan di Balai Penelitian Ternak (BPT) Bagian Unggas, Ciawi, Bogor dan pengolahan data dilakukan di Laboratorium Nutrisi Unggas, Fakultas Peternakan Institut Pertanian Bogor pada Juni sampai Juli 2000. Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan antibiotik zinc bacitracin 42 ppm, probiotik Bacillus sp. dan Saccharomyces cerevisiae dalam ransum ayam broiler terhadap persentase berat karkas, hati, rempela, ginjal, jantung dan lemak abdominal.
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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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