Judul: Kandungan lemak, kolestrol daging serta penampilan ayam broiler umur 3 minggu sampai 5 minggu yang diberi daun katuk (Souropus androgynus) dalam ransumnya
Abstrak: Perbaikan tingkat pendapatan dan pendidikan turut serta mempengaruhi permintaan dan preferensi terhadap daging ayam broiler berkadar lemak sedang dan kolesterol yang rendah. Sekarang ini terdapat kecenderungan permintaan konsumen terhadap karkas yang besar terutama pada industri olahan bahan pangan asal unggas. Untuk memenuhi kebutuhan tersebut dibutuhkan ayam yang dipelihara sampai umur 8 minggu. Pada umur tersebut ayam broiler cenderung menimbun lemak dalam jumlah banyak sehingga perlu diturunkan. Daun katuk atau Sauropus androgynus bukan hanya dikenal sebagai tanaman obat, sayuran dan pelancar ASI tetapi juga mampu menurunkan kandungan lemak dan kolesterol pada produk-produk ayam petelur. Kualitas daging broiler yang baik mengandung lemak dan kolesterol dalam jumlah yang mencukupi. Respon daun katuk terhadap penampilan ayam broiler sampai umur 8 minggu belum diketahui. Penelitian ini bertujuan untuk mengetahui pengaruh pemberian tepung daun katuk (TDK) dalam ransum ayam broiler yang dipelihara dari umur 3 minggu sampai 8 minggu. Sebanyak 160 ekor ayam broiler yang berumur 3 minggu dibagi secara acak ke dalam 4 buah perlakuan dan 4 buah ulangan dengan satuan percobaan sebanyak 10 ekor. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap (Completely Randomized Design). Penelitian terdiri atas 4 buah perlakuan yang dibedakan atas tingkat pemberian TDK, yaitu (a) PO (ransum basal kontrol), (b) P1 (ransum basal yang mengandung 5% tepung daun katuk), (c) P2 (ransum basal yang mengandung 10% tepung daun katuk) dan (d) P3 (ransum basal yang mengandung 15% tepung daun katuk). Peubah yang diukur adalah pertambahan berat badan, konsumsi ransum, konversi ransum, persentase berat karkas, persentase berat lemak abdominal serta kadar air, lemak, protein dan kolesterol total daging. Data yang diperoleh diuji sebaran normalnya terlebih dahulu, kemudian dianalisis dengan Sidik Ragam serta Uji Kontras Ortogonal. ...
Keyword: katuk, lemak, kolesterol, penampilan

Judul: Kandungan Vitamin A, Kolcsterol, Lernak dan Profil Asam Lernak Karkas Broiler yang Diberi Tepung Daun Katuk (Sauropus androgvnus L. Merr) &am Ransum
Abstrak: Katuk leaf (Sauropus andvogynus L. Merr) has known as a medicinal plant that can improve breast milk production. The study was designed to evaluate the use of katuk leaf meal in reducing fat and cholesterol in broiler chickens. This experiment is important because broilers contain high fat and cholesterol. The objectives of this experiment were to improve broiler carcass quality with reduced fat and cholesterol and improved vitamin A content in meat and liver. A Completely Randomized Design was used in this study followed by Analysis of Variance (ANOVA) and a Contrast Orthogonal for the statistical analysis. One hundred and sixty unsexed broiler chickens were divided into 4 treatment groups with 4 replications and 10 chickens in each replicate. Four treatment diets were 0%, 5%, 10% and I 5% of katuk leaf meal in the diet. The treatment diets were formulated during grower phase (3-6 weeks) and finisher phase (6-8 weeks). An adaptive period from 2-3 weeks of age was applied before giving the treatment diets. The parameters observed were feed consumption, weight gain, final body weight at 56 days old, feed conversion, vitamin A, cholesterol, fat, abdominal fat, protein, Fe contents and fatty acid profile. The results of this research showed that the feed consumption was not significantly different for all treatment diets. The weight gain and final body weight at 56 days old were highly significantly decreased (P<0.01). The feed conversion was highly significantly improved (P<O. 0 I). The analysis on carcass quality showed that the addition of katuk leaf meal gave better results as compared to that of the control group. Vitamin A content in meat and liver was h e highest when 15% of katuk leaf meal was added in the diet. Meat and liver cholesterol were significantly decreased. The fat content in the carcass decreased up to 28.30% from the control group. The abdominal fat was highIy significantly decreased (P<0.01) but the Fe content in meat and liver was not significantly different than that of the control group. This result showed that katuk leaf meal could reduce the meat and liver cholesterol content as well as the abdominal fat. This results showed that 15% katuk leaf meal in ration gave the best quality of carcass than the other treatment groups because it contained the highest vitamin A, the lowest cholesterol and the lowest abdominal fat.
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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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