Judul: Pengaruh Pemberian Ketumbar (Coriandrum sativum L) terhadap Organ Dalam Ayam Broiler
Abstrak: Herb is plant used as a medicine, seasoning, or flavoring. When consumed by livestock in a normal dosage, it can reduce stress without any negative effects. In this study, coriander, a type of herb, was given to the broilers which were reared intensively. Coriander contains flavonoid, which is antibacterial in nature, and it also has an antioxidant that can enhance the work of immune system. The objective of this experiment was to study the effect of coriander seed in the diet on the internal organs of broilers. The research was conducted in the Laboratory of Poultry Production (Cage B), Faculty of Animal Science, Bogor Agricultural University. This study used by a completely randomized design (CRD). The study involved 120 DOC with 4 dietary treatments and 3 replication (10 broilers / cage). The dietary treatments consisted of P0 (control, without corianders seeds), P1 (1% coriander seeds), P2 (2% coriander seeds) and P3 (3% coriander seeds). The data obtained were analyzed using analysis of variance, ANOVA. The treatment that indicated a significant effect on the observed variables would be further tested by using Duncan. The research results show that the treatment of giving coriander seeds were not significant different (P> 0.05) compared to the control on gizzard, duodenum, jejenum, illeum, pancreas, seka, liver, heart and spleen. The coriander seeds treatment was significantly different (P <0.05) compared to the control on the bursa fabrisius and highly significantly different (P <0.01) on thymus weight. Coriander seeds treatment up to the level of 3% had no effects on the gizzard, duodenum, jejenum, illeum, pancreas, seka, liver, heart, kidneys, and spleen of broilers aged 5 weeks. The coriander seeds treatment up to the level of 2% increased the weight of bursa fabrisius and coriander seeds treatment up to the level of 3% increased the weight thymus.
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Judul: Penggunaan Biji Ketumbar (Coriander sativum Linn) Sangrai Dalam Ransum Terhadap Performa Ayam Broiler
Abstrak: Using antibiotics as a feed additive made residues in broiler’s carcass. If meat’s chicken being consumed, it made some worry about antibiotic resistance, so it should required feed additive non antibiotic which made from the natural materials (herbs), such as coriander. By using natural materials (herbs), made some benefits and advantages as well as being an alternative to antibiotics. Broiler chickens fed diets containing 0%, 2% and 2% roasted coriander with three replications. This research was conducted for five weeks. First week until third week was starter phase and fourth week and fifth week was the finisher phase. Variables observed in this research were body weight, body weight gain, consumption, feed conversion and mortality. The results of research on weight loss phase of starter looks significantly different (P<0.01), and for body weight gain, consumption, and feed conversion were significantly different (P<0.05). For the finisher phase of weight gain and increase body weight looked significantly different (P<0.05) and significantly different (p<0.01), except for consumption and feed conversion did not look significantly different (p>0.01). This result indicated that the addition of 2% toasted coriander seeds can not be used for the finisher phase.
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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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