Judul: Perbaikan performa ayam broiler melalui pemberian metionina sebagai imbuhan pakan
Abstrak: Methionine is a safe, economic, and high quality feed additive. A study on the effect of methionine supplementation on broiler chicken performance was conducted by using 30 broiler chickens. Broiler chickens were assigned into 3 groups: P1 (control, without methionine supplementation), P2 (0.2% methionine supplementation), and P3 (0.4% methionine supplementation). Parameters measured were growth rate, final body weight, feed efficiency (feed convertion ratio/FCR), and mortality rate. The result showed that 0.4% methionine supplementation significantly increased growth rate, final body weight, and feed efficiency (P<0.05). However, growth rate and final weight were not affected by 0.2% methionine supplementation (P≥0.05). Methionine supplementation increased broiler performance between 7-21 days of age and showed no effect after 21 days of age. It was concluded that methionine usage as a feed additive is recommended in broiler chicken with 0.4% of dose, between 7-21 days of age
Keyword: broiler chicken, methionine, FCR, body weight, mortality.

Judul: Influence of Liquid Methionine Supplementation in Drinking Water to Performance, Carcass Percentage and Viscera of Broiler Finisher Periods
Abstrak: Ayam broiler dibudidayakan karena memiliki sifat produski yang relatif cepat. Produksi ayam broiler ditentukan oleh berbagai faktor termasuk kualitas pakan. Umumnya nutrien dalam pakan komersil sudah mencukupi kebutuhan ayam broiler meskipun memiliki standard kebutuhan yang berbeda. Pakan komersil yang dipakai peternak kualitas nutriennya bisa menurun karena proses transportasi dan penyimpanan yang kurang baik. Penambahan metionin cair dalam air minum diharapkan dapat mengatasi penurunan kualitas metionin karena masalah diatas. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan metionin cair sebanyak 0,05% dan 0,1% terhadap performa, persentase karkas dan organ dalam ayam broiler periode finisher. Penelitian ini dilaksanakan dari bulan Juli hingga Agustus 2008 di kandang panggung peternak komersil di Desa Pamijahan, Leuwiliang, Kabupaten Bogor. Penelitian ini menggunakan ayam broiler umur sehari (DOC) strain Cobb sebanyak 3600 ekor yang dibagi ke dalam sembilan petak. Ransum yang digunakan adalah ransum periode finisher dari tiga pabrik yang berbeda. Penambahan metionin cair dalam air minum dengan konsentrasi 0%, 0,05% dan 0,1%. Rancangan yang digunakan adalah Rancangan Acak Kelompok (RAK). Peubah yang diukur adalah konsumsi ransum, konsumsi air minum, pertambahan bobot badan, konversi ransum, bobot hidup, bobot karkas, bobot hati, jantung, limpa, ginjal, lemak abdomen, pankreas, gizzard dan panjang usus halus. Pengambilan data untuk mengukur bobot badan menggunakan sampel sebanyak 10% dari populasi. Data yang diperoleh dianalisis dengan sidik ragam (ANOVA), jika berpengaruh nyata dilakukan uji kontras ortogonal. Penambahan metionin cair sebanyak 0,05% dan 0,1% dalam air minum tidak berpengaruh terhadap performa, persentase karkas dan organ dalam ayam broiler periode finisher, hal ini disebabkan karena kualitas pakan sama baik dan tidak terjadi perubahan kandungan mentionin dalam ransum akibat pengiriman dan penyimpanan.
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Judul: Persamaan Korteweg-de Vries Orde Tinggi untuk Menggambarkan Gerak Gelombang Internal
Abstrak: The ocean can be considered of layers of fluid that each layer has a constant density. Internal waves are waves occur in the interface of every'two layers with different density. Because it occures underneath the surface of the ocean, it is invisible. One of internal waves is internal solitary waves. One of formulation that can describe intemal waves movement is KdV equation. KdV equation is derived from governing equations of ideal fluid in Lagrange formulation using asymptotic method. On this thesis, KdV equation is derived in higher order and then its solution is derived by using internal solitary waves assumption. An example of a two-layer fluid is a case will be used. By using Mathematica6 software, for this case will be obtained the coefficients in lower and higher order explicitly and the corresponding between coefficients and relative lower layer depths and fluid depths, the corresponding between coefficients and relative densities, and also observed the different between solitary waves in lower and higher order.
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