Judul: Sintesis Protein Mikroba dan Aktivitas Enzim Selulase Rumen Sapi Nama NIM Bali In Vitro dengan Penambahan Sabun Kalsium-Minyak Kedelai
Abstrak: Soybean oil-calcium soap is soap-protected soybean oil as a source of polyunsaturated fatty acids. Provision of soybean oil-calcium soap can removes negative effects of unsaturated fatty acids on rumen microbes and optimize rumen fermentation. The research was aimed to study the effect of soybean oil calcium soap on ammonia concentration, microbial protein synthesis and the activity of cellulase enzymes in vitro. The experiment was designed in completely randomized block design (RBD) with 3 treatments and 4 block based on time rumen sampling. The treatments were control diet (C), C + 5% soybean oil (M), and C + calcium-soap of 5% soybean oil (S). The results showed that supplementation of calcium-soap soybean oil at level 5% did not significantly affect the pH value, NH3 concentration and microbial protein synthesis. Mean while it could increase the activity of cellulase enzyme.
Keyword: Bogor Agricultural University (IPB), rumen microbial protein synthesis, soybean oil, calcium soap

Judul: In vitro nutrient digestibility of bali cattle ration addition with calcium soap of soybean oil in vitro
Abstrak: Penelitian ini bertujuan untuk mengkaji pengaruh penambahan minyak kedelai yang diproteksi dengan sabun kalsium pada ransum terhadap kecernaan nutrien yaitu kecernaan bahan kering (KcBK), kecernaan bahan organik (KcBO), kecernaan protein kasar (KcPK), kecernaan lemak kasar (KcLK), dan kecernaan serat kasar (KcSK) secara in vitro. Penelitian ini menggunakan Rancangan Acak Kelompok dengan 3 perlakuan dan 4 ulangan. Perlakuan yang diberikan meliputi Perlakuan ransum kontrol (K), K + minyak kedelai 5% (M), dan K + sabun kalsium minyak kedelai 5% (S). Hasil penelitian menunjukkan bahwa penggunaan minyak kedelai pada tingkat 5% baik proteksi maupun tanpa proteksi dengan teknik sabun kalsium tidak mempengaruhi kecernaan bahan kering dan bahan organik, kecernaan protein kasar, serat kasar dan lemak kasar. Hasil ini menunjukkan bahwa penambahan sabun kalsium minyak kedelai tidak memiliki efek negatif pada aktivitas rumen dalam degradasi pakan., The research was aimed to evaluate the effect of soybean oil addition with and without protection using calcium soap in the diet on in vitro dry matter digestibility (DMD), organic matter digestibility (OMD), crude protein digestibility (CPD), ether extract digestibility (EED) and crude fiber digestibility (CFD). This study used randomized block design with 3 treatments and 4 replications. The treatments were control diet (C), C + 5% soybean oil (M), and C + Calcium soap of soybean oil 5% (S). The result showed that use of soybean oil at level 5% either with or without protection using calsium soap did not affect dry and organic matter digestibility, crude protein digestibility, crude fiber digestibility and ether extract digestibility. This result indicating that the addition of soybean oil calcium soap didn’t have negative effect on feed degradation by rumen microbe.
Keyword: kecernaan nutrien, minyak kedelai, sabun kalsium, sapi bali

Judul: Cycle Hamilton pada Graf Lengkap, Graf Regular, dan Graf 2-Connected 4-Regular Berorder Kurang dari Sepuluh.
Abstrak: Suatu graf disebut graf Hamilton apabila graf tersebut memuat cycle Hamilton, yaitu cycle yang melewati setiap vertex tepat satu kali. Menentukan keberadaan cycle Hamilton pada suatu graf dapat menggunakan syarat cukup yang berupa teorema-teorema yang telah diperkenalkan sejak tahun 1950-an. Beberapa syarat cukup yang dibahas dalam karya ilmiah ini adalah syarat cukup yang berhubungan dengan graf lengkap dan graf regular. ,,,
Keyword: graf Hamilton, graf regular, graf lengkap, graf 2-connected 4-regular.