Judul: Pengaruh Suplementasi Mineral Zn dan Vitamin E terhadap Performa ayam Kampung (Gallus domesticus)
Abstrak: Zink and vitamin E plays an active role in the metabolism and protect blood cells whose function is to transport nutrients. The objective of this study was to evaluase the effect of Zn and vitamin E suplementation on performances of kampong chicken (Gallus domesticus) and the length of the shank. One hundred and sixty kampong chickens were used in this experiment and reared from 8 up to 10 weeks of age. The data analyzed with a Completely Randomized Design using 5 treatment diets and 4 replications, with 10 birds in each replicate. The experimental diets were : R1 ( control diet, without mineral Zn and vitamin E), R2 ( R1 + Zn 200ppm ), R3 ( R1+ vitamin E 200IU ), and R4 ( R1 + Zn 200ppm and vitamin E 200IU ). Parameter observed were feed intake, the final body weight, body weight gain, feed conversion, mortality, lenght of the shank.The results showed that Zn and vitamin E suplementation did not affect the performances of kampung chicken. There was no mortality due to treatments during the study. Mineral Zn and Vitamin E in the diets were already meet the requirement of kampong chicken
Keyword: vitamin E., performances, mineral Zn, kampong chicken

Judul: Fortifikasi Vitamin E dan Se sebagai Antioksidan terhadap Performa dan Kandungan Se Daging Ayam Kampung
Abstrak: Vitamin E and Se are antioxidant and essential micronutrient in poultry for normal health. The fortification of them was necessary to prevent the damage of phospholipid membranes, enzymes and other important molecules due to free radicals. One hundred and sixty Kampong chickens were used to evaluate the effects of dietary fortification of vitamin E, Se, and its combination on the performance of kampong chicken aged 8-13 weeks and Se content of the meat. The birds were fed control diet (P0); P0 + vitamin E 200 ppm (P1); P0 + Se organic 0.2 ppm (P2); and P0 + combination of vitamin E 200 ppm and Se organic 0.2 ppm (P3). This experiment used a Completely Randomized Design (CRD). The data were analyzed using Analysis of Variances (ANOVA). The parameters observed were feed consumption, body weight gain, feed conversion, final body weight, and Se content of the meat. The results showed that vitamin E and selenium fortification, or its combination did not affect (P> 0.05) the performance of kampong chickens, Se content of the meat increased 717.24% due to fortification of 0.2 ppm Se.
Keyword: vitamin E., Se organic, Se in meat, performance, kampong chicken

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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