Judul: Efektivitas Pemberian Plantarisin dalam Ransum sebagai Feed Additive terhadap Performa Ayam Broiler
Abstrak: Penelitian ini dilakukan untuk mengevaluasi pengaruh penggunaan plantarisin sebagai alternatif Antibiotic Growth Promotor terhadap performa ayam broiler. Ternak yang digunakan adalah ayam broiler jantan strain New Lohmann (MB 202) sebanyak 280 ekor. Penelitian dilakukan selama 5 minggu. Metode yang digunakan dalam penelitian adalah Rancangan Acak Lengkap (RAL) dengan 7 perlakuan dan 4 ulangan. Perlakuan yang digunakan adalah P0: Ransum Kontrol (ransum tanpa penambahan plantarisin), N1: Ransum Kontrol + Plantarisin Native 0.05%, N2: Ransum Kontrol + Plantarisin Native 0.10%, N3: Ransum Kontrol + Plantarisin Native 0.15%, R1: Ransum Kontrol + Plantarisin Rekombinan 0.05%, R2: Ransum Kontrol + Plantarisin Rekombinan 0.10% dan R3: Ransum Kontrol + Plantarisin Rekombinan 0.15%. Peubah yang diamati ialah konsumsi ransum, bobot badan, pertambahan bobot badan, konversi ransum dan mortalitas ayam broiler. Disimpulkan bahwa penambahan plantarisin sebagai feed additive tidak memberikan pengaruh terhadap konsumsi ransum, bobot badan, pertambahan bobot badan dan konversi ransum. Mortalitas ayam selama penelitian relatif tinggi, yaitu 10% dari populasi ayam yang dipelihara. Kata kunci: antibiotik, broiler, performa, plantarisin ABSTRACT MUHAMMAD JORDY ANDRIAN PAHLEVI. Effectiveness of Plantaricin Addition as Feed Additive in the Diet on Performance of Broiler Chicken. Supervised RITA MUTIA and WIDYA HERMANA. This research aims to evaluate the effectiveness of the use of plantaricin as an alternative to the use of Antibiotic Growth Promotor in feed to the performance of broiler chickens. This study used 280 male New Lohmann (MB 202) broiler chickens with completely randomized design (CRD) consisting of 7 treatments and 4 replications. The treatments were P0: Control (ration without addition of Plantaricin), N1: P0 + Plantaricin Native 0.05%, N2: P0 + Plantaricin Native 0.10%, N3: P0 + Plantaricin Native 0.15%, R1: P0 + Plantaricin Rekombinan 0.05%, R2: P0 + Plantaricin Rekombinan 0.10% and R3: P0 + Plantaricin Rekombinan 0.15%. The variables observed were feed consumption, body weight, body weight gain, feed conversion and broiler mortality. It concluded that the addition of plantaricin as a feed additive did not influence feed consumption, body weight, body weight gain and feed conversion ratio. Chicken mortality during the research was relatively high, ie 10% of the chicken population was maintained.
Keyword: antibiotics, broiler, performance, plantaricin

Judul: Persentase Karkas, Lemak Abdomen, dan Potongan Komersial Ayam Broiler yang Diberi Plantarisin sebagai Feed Additive
Abstrak: Penelitian ini bertujuan untuk mengevaluasi efektivitas penggunaan plantarisin sebagai alternatif penggunaan Antibiotik Growth Promotor di dalam pakan terhadap persentase karkas, lemak abdominal, dan potongan komersil (dada, paha, pangkal paha, sayap, punggung) ayam broiler. Penelitian ini menggunakan 280 ekor ayam broiler jantan strain Lohman MB 202 dengan rancangan acak lengkap (RAL) terdiri dari 7 perlakuan 4 ulangan. Perlakuan tersebut yaitu P0: Kontrol (ransum tanpa penambahan Plantarisin), N1 : P0 + Plantarisin Native 0.05 %, N2 : P0 + Plantarisin Native 0.10 %, N3 : P0 + Plantarisin Native 0.15 %, R1 : P0 + Plantarisin Rekombinan 0.05 %, R2 : P0 + Plantarisin Rekombinan 0.10 %, R3 : P0 + Plantarisin Rekombinan 0.15 %. Hasil yang diperoleh menunjukan pemberian plantarisin berpegaruh nyata (P<0.05) terhadap persentase paha dengan persentase tertinggi pada perlakuan R1, dan tidak berpengaruh nyata (P>0.05) terhadap persentase karkas, lemak abdomen, dada, pangkal paha, sayap, dan punggung ayam broiler. Penambahan plantarisin dalam pakan memberikan pengaruh yang sama dengan kontrol.
Keyword: Plantarisin, antibiotik, persentase karkas, lemak abdomen, potongan komersial, broiler

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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