Judul: Kecernaan energi semu marmot (Cavia porcellus) jantan dan betina lokal pada berbagai level pemberian vitamin C
Abstrak: The object of this research is to compare the effect of vitamin C intake at numerous levels to apparent energy digestible of male and female indigenous guinea pig. The animals that used in this research are 18 indigenous male guinea pigs and 18 indigenous female guinea pigs. The average guiaea pig weight at the beginning of the research is around 250 to 500 gmms. The treatments are RO (complete ration without vitamin C adding), R1 (complete ratio with vitamin C 3 mg/animdday), R2 (complete ration with vitamin C 4 mglanimallday), R3 (complete ration with vitamin C 5 mglanimal/day), R4 (complete ration with vitamin C 6 mglanimalld~y) and RS (complete ration with vitamin C 7 mglanimallday). Research desiy used is Factorial Completely Randomize Design, with factor A as genitalia male and female and factor B as vitamin C intake level, which divided into 3 groups based on v.eight, high (450-500g), medium (350-450g) and low (250-350g). The result shows rnat vitamin C intake From 4 mglanimal/day to 7 mglanimallday can increase erergy cmsumption and do not effect fecei energy and digest coefficient of apparent energy of male and female guinea pig. Energy consumption and feces energy of male guinea pig is higher than the female, but the digest coefficient of apparent energy of female guinea pig is higher than the male. Besides that, there's no interaction behveen vitamin C intake level and the genitalia of guinea pig. From this research, we can conclude that 3 ,4, 5, 6 and 7 mglanimallday of vitamin C intake do not effect apparent energy digestible of .nale ;md female indigenous guinea pig.
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Judul: Persentase Karkas dan Komposisi Kimia Daging Marmot Lokal Jantan Pada Berbagai Level Pemberian Vitamin C
Abstrak: Marmot sebagai ternak penghasil daging pengganti yang kualitas dagingnya perlu diperhatikan karena berhubungan langsung dengan kesehatan konsumen. Kandungan lemak dan kolesterol yang tinggi dapat dijadikan indikator konsumen untuk mengkonsumsi daging, karena kekhawatiran akan penyakit jantung dan arteriklorosis. Vitamin C merupakan faktor yang dapat menurunkan kadar lemak dan kolesterol dalam tubuh, oleh karena itu penambahannya dalam ransum komplit marmot diharapkan dapat menurunkan kadar lemak dan kolesterol daging yang dihasilkan. Tujuan dari penelitian ini adalah untuk mempelajari pengaruh penambahan vitamin C terhadap persentase karkas dan komposisi kimia daging marmot lokal jantan. Penelitian dilakukan di Laboratorium Lapang Nutrisi Ternak Daging dan Kerja, Departemen Ilmu Nutrisi dan Teknologi Pakan, Institut Pertanian Bogor, selama 10 minggu dari bulan Januari - Maret 2006. Rancangan yang digunakan adalah Rancangan Acak Kelompok (RAK) dengan enam perlakuan yaitu level vitamin C : 0, 3, 4, 5, 6 dan 7 mg/hari dan tiga kelompok yaitu bobot badan tinggi (460-500 g), sedang (360-450 g) dan rendah (250-350 g). Pengaruh perlakuan dianalisa dengan sidik ragam (ANOVA) dan jika terdapat perbedaan terhadap perlakuan dilakukan uji lanjut Duncan. Hasil secara keseluruhan menunjukan bahwa suplementasi vitamin C tidak berpengaruh terhadap bobot hidup akhir (391,67-470 g), kadar abu (1,27-1,56 %), protein (17,74-20,24%) dan lemak (1,32-1,81%), tetapi memberikan pengaruh yang nyata (p<0,05) terhadap kadar air daging (73,64-76,83%) serta sangat nyata (p<0,01) terhadap persentase karkas (37,96-40,42 %) dan kolesterol daging (1,07-1,59 mg%). Untuk menghasilkan daging yang berkualitas disarankan penambahan vitamin C 6 mg/ekor/hari pada ransum untuk marmot dewasa.
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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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