Judul: Pendugaan Kadar Neutral Detergent Fiber dan Acid Detergent Fiber pada Pakan Berdasarkan Hasil Analisa Proksimat
Abstrak: Feed is an important component in animal husbandry industry. Feed quality can be evaluated by physical characteristic, chemical composition and biological values. Proximate analysis is one of chemical analysis to counting chemical composition in the feed. Van Soest analysis is one of chemical analysis to evaluate fiber in the feed. This study was aimed to determine the relationship beetwen proximate analysis and Van Soest’s fiber component in feed and to predict Van Soest’s fiber component (NDF and ADF) from proximate analysis component such as Ash, Crude Protein (CP), Ether Extract (EE), Crude Fiber (CF) and Nitrogen Free Extract (NFE). This study used database of feed ingredients from Laboratory of Feed Science and Technology, Departement of Nutrition and Feed Technology, Faculty of Animal Husbandry, Bogor Agricultural University. Data were analyzed by correlation analysis and regression (linier regression with single and multiple variables). Accuracy levels of the relationships between variables were expressed as coefficient determination (r2), P Values and Root Mean Square Error (RMSE). The result showed that Neutral Detergent Fiber (NDF) had a strong correlation with Ash, Extract (EE), Crude Fiber (CF) and Nitrogen Free Extract (NFE). Acid Detergent Fiber (ADF) component had a strong correlation with Ash, Crude Fiber (CF) and Nitrogen Free Extract (NFE). NDF can be predicted using a model NDF = -3.925 + 1.64 Ash + 1.528 CF – 0.02 EE + 0.399 NFE (r2=0.814; P=0.002; RMSE = 14.20) and ADF can be predicted using a model ADF = 24.937 + 1.082 Ash + 0.645 CF – 0.077 NFE (r2=0.319; P<0,001; RMSE=12.67). It concluded that proximate analysis component can be used to predict Van Soest’s component in the fee
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Judul: Analisis Kandungan Nitrogen Dinding Sel pada Sumber Pakan Hijauan dan Hubungannya dengan Pencernaan Protein di Rumen secara in Vitro
Abstrak: The purpose of this experiment was to study regarding the correlation between the nitrogen content of the cell wall, proximate components, and fibre Van Soest components with feed protein digestibility in the rumen. The materials which used in this research are leaves of gamal, trikantera, indigofera, kaliandra, daun pepaya, daun singkong, and lamtoro. Proximate analysis is conducted to measure the content of water, ash, crude protein, crude fibre, and crude fat that contain in the sample. Van Soest analysis is conducted to measure the value of NDF (Neutral Detergent Fibre), ADF (Acid Detergent Fibre), NDICP (Neutral Detergent Insoluble Crude Protein), and ADICP (Acid Detergent Insoluble Crude Protein). In vitro analysis is conducted to measure the degradation and digestibility’s value of dry material and organic material, and also the value of crude protein digestibility, NH3 and VFA (Volatile Fatty Acid) components. The result of this research showed that cassava leaves (Manihot utilisima) has the highest level of crude protein and NDICP, the lowest level of ADICP and also high enough level of KCPK. It can be concluded that cassava leaves are the best forage in this research for ruminant
Keyword: NDICP, KCPK, ADICP

Judul: Formulasi Hamiltonian untuk Menggambarkan Gerak Gelombang Soliter Dimensi Tiga di Permukaan Laut
Abstrak: Gelombang permukaan adalah gelombang yang terjadi perbedaan rapat massa antara air dan udara. Salah satu gelombang permukaan yang ditinjau adalah gelombang soliter. Formulasi gelombang soliter dilakukan dengan menggunakan formulasi Hamiltonian.
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