Judul: Pengaruh Pemberian Tepung Daun dan Bunga Marigold (Tagetes erecta) dalam Pakan terhadap Kualitas dan Kandungan Vitamin A Telur Ayam
Abstrak: Marigold (Tagetes erecta) merupakan tanaman yang telah lama dikenal dan telah dimanfaatkan untuk berbagai kepentingan dan tujuan. Masyarakat pada umumnya menggunakan marigold sebagai anti nematoda, fungisida, dan insektisida karena kandungan terpenoidnya. Marigold juga biasa digunakan sebagai pewarna makanan karena terdapat karotenoid. Dalam bidang peternakan karotenoid dapat digunakan untuk menghasilkan warna yang diinginkan pada produk unggas dan menjadi sumber provitamin A yang dapat diubah menjadi vitamin A dalam tubuh hewan yang pada akhirnya dapat meningkatkan kandungan vitamin A pada produk peternakan. Penelitian ini bertujuan untuk membandingkan pengaruh penggunaan tepung daun, tepung bunga, dan campuran tepung daun dan bunga marigold dalam pakan ayam terhadap kualitas dan kandungan vitamin A pada telur ayam. Penelitian ini menggunakan 48 ekor ayam petelur fase produksi jenis Hy-Line Brown mulai umur 19 minggu yang dilakukan di Laboratorium Lapang Ilmu Nutrisi Ternak Unggas, Fakultas Peternakan, Institut Pertanian Bogor dengan pemeliharaan selama 11 minggu dari bulan April sampai Juli 2011. Penelitian terdiri dari 4 perlakuan, dan 3 ulangan, setiap ulangan terdiri dari 4 ekor ayam. Perlakuan yang diberikan terdiri atas R0 (perlakuan kontrol), R1 (pakan dengan 5% tepung daun marigold), R2 (pakan dengan 5% tepung bunga marigold), dan R3 (pakan dengan 2,5% tepung daun + 2,5% tepung bunga marigold). Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap (RAL). Data yang diperoleh dianalisis secara statistik menggunakan sidik ragam (Analysis of Variance/ANOVA), jika didapat hasil yang berpengaruh nyata maka dilakukan uji lanjut dengan menggunakan uji Duncan.
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Judul: Persentase Organ Dalam serta Kandungan Vitamin A Hati Ayam Petelur yang Diberi Pakan Mengandung Marigold (Tagetes erecta)
Abstrak: Marigold is an ornamental plant that contains carotenoids, carotene and xantofil. The purpose of this research were the used of marigolds as feed and evaluate its effect on the internal organs of laying hens and the storage vitamin A on liver. This study used 48 laying hens (19 weeks Hy-Line Brown type on production phases) which were treated for 11 weeks. The experimental design used a completely randomized design (CRD) with four treatments and three replications. The treatments were R0 : control diet without marigold meal, R1 : diet contained 5% leaf meal (TDM), R2 : diet contained 5% flower meal (TBM), R3 : diet contained 2.5% leaf meal (TDM) and 2.5% flower meal (TBM). The result of analysis showed the increment of marigold mixture 2.5% leaf meal (TDM) and 2.5% flower meal (TBM) significantly affected (P<0.05) diets and consumption of provitamin A. Vitamin A on liver was analyzed by HPLC method and descriptively showed the increment of 5% flower meal and marigold mixture 2.5% leaf meal (TDM) and 2.5% flower meal (TBM) had the highest amount. The addition of marigold significantly affected (P<0.05) weight of the bile and the spleen of internal organs. As the result it can be concluded the addition of marigold mixture 2.5% leaf meal (TDM) and 2.5% flower meal (TBM) has better effect than other treatments.
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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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