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: Effect of Vitamin E and Selenium (Se) Fortification In The Diets on Native Chicken’s Giblet Age of 13 Weeks Old
Abstrak: Penelitian ini dilakukan untuk mengevaluasi pengaruh fortifikasi vitamin E dan mineral selenium pada pakan terhadap kondisi organ dalam ayam kampung. Vitamin E dan mineral selenium merupakan zat yang mampu menjadi antioksidan alami yang berperan sebagai pengendali cekaman panas yang terjadi akibat kondisi lingkungan. Penelitian dilakukan selama 5 minggu dengan memelihara ayam kampung sebanyak 160 ekor umur 8 minggu yang dialokasikan pada empat perlakuan yaitu, T1 (ransum basal), T2 (ransum basal + 0.2 mg Se organik kg-1), T3 (ransum basal + 200 IU vitamin E) dan T4 (ransum basal + 200 IU vitamin E + 0.2 mg Se organik kg-1). Peubah yang diamati meliputi persentase bobot karkas, hati, jantung, rempela, pankreas, limpa, usus halus, colon, cecum, lemak abdomen, kelenjar timus, empedu, proventikulus dan bursa fabrisius. Data yang diperoleh dianalisis menggunakan Rancangan Acak Lengkap (RAL), dan uji lanjut menggunakan uji duncan. Hasil penelitian menunjukan bahwa fortifikasi vitamin E dan mineral selenium pada taraf pemberian tersebut tidak mempengaruhi bobot organ dalam. Penambahan vitamin E 200 IU dan mineral selenium 0.2 mg kg-1 dalam ransum nyata (P<0.05) meningkatkan bobot lemak abdomen ayam kampung umur 13 minggu. Fortifikasi vitamin E dan mineral selenium pada taraf pemberian masing-masing 200 IU dan 0.2 mg kg-1 tidak memberikan pengaruh negatif terhadap organ dalam ayam kampung dan lemak abdomen ayam kampung umur 13 minggu.
Keyword: Bogor Agricultural University, IPB (Institut Pertanian Bogor), IPB, native chicken, giblet, selenium, vitamin E, Feed technology, Feedstuffs, Animal husbandry, Karkas, animal feeding

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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