Judul: Pengaruh penambahan kunyit dalam ransum sebagai antibakteri terhadap performaa ayam broiler yang diinfeksi dengan Eschericia coli
Abstrak: Curcuma domestica, Val can be used as nature antibacteria. The objective of the experiment was to determine the effect of Curcuma domestica in the diets on broiler performance. This research use 75 day old chicks (DOC) of Cobb strain which were kept in litter system during six weeks. The experiment used completely randomized design wth five treatment and three replicates which consisted of five (positive control), R0 = comersial diet without antibiotic (positive control), R1 = commercial diet without antibiotik (E. coli infected) (negative control), R2 = R0 + 1% Curcuma domestica (E. coli infected), R3 = R0 + 2% Curcuma domestica (E. coli infected), R4 = R0 + 0.01% antibiotic syntetic (bambermycin) (E. coli nfected) R4 = R0 + 0.01%
Keyword: 

Judul: Pengaruh Pemberian Prebiotik Dari Tongkol Jagung Terhadap Retensi Nitrogen Dan Energi Metabolis Ransum Ayam Broiler Pasca Infeksi Bakteri Escherichia Coli.
Abstrak: An experiment has been conducted to study the effect of feeding corncob prebiotic on nitrogen retention and metabolizable energy of broiler diet post-infected with Escherichia coli bacteria. Thirty broiler chickens at five week of age were used in this experiment and divided into six treatment groups and each consisted of five replications. The treatments were K1 (basal diet, non infected E. coli), K2 (basal diet, infected E. coli), P1 (basal diet + prebiotic 2.5%, non infected E. coli), P2 (basal diet + prebiotic 2.5%, infected E. coli), B1 (basal diet + antibiotic 0.05%, non infected E. coli), B2 (basal diet + antibiotic 0.05%, infected E. coli). The diets contained 3150 kcal/kg ME and 18% crude protein according to Leeson and Summers (2005). Antibiotic used in this experiment was Bambermycin. A Completely Randomized Factorial Design was used in this experiment and Duncan’s multiple range test used as further test. Adding prebiotics in the diet of broilers infected with E. coli significantly (P<0.05) increased metabolizable energy. Adding prebiotics in the diet of broilers significantly (P<0.01) decreased nitrogen consumption and nitrogen retention. The conclusion of this study is that prebiotics supplementation in the diet of broiler improved on metabolizable energy.
Keyword: 

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.
Keyword: