Judul: Fermentabilitas, Populasi Protozoa, Alantoin Urin, dan Neraca Nitrogen Domba Lokal Calon Induk yang Diberi Sumber Asam Lemak Tak Jenuh Berbeda
Abstrak: The addition of poly unsaturated fatty acid (PUFA) in feed is needed for energy source and reproductive function. However, fat supplementation to the diet can disrupt the fermentation system, microbial population in the rumen, and limit the synthesis by rumen microbes. The objective of this research was to study the influences of feed containing different sources of unsaturated fatty acid on protozoa population, rumen fermentability, the urinary allantoin excretion rate, and the nitrogen (N) balance in the body. Twelve three-months old post weaning local female sheep were used in this study. The sheep were allocated in a Randomized Block Design and divided into three groups based on body weight and subjected to four treatments. Four treatments were M0 = control diet, MJ = diet containing 1.5% corn oil, MIL = diet containing 1.5% lemuru fish oil, MILT = diet containing 1.5% protected lemuru fish oil. Data were analyzed using analysis of variance and any significant differences were further tested using contrast orthogonal. The results showed that the protozoa population, ruminal NH3 level, excretion of allantoin, and N retention were not affected (P>0.05) by dietary supplementation, but the volatile fatty acid (VFA) level was very significantly (P<0.01) increased with the addition of corn oil (171.49 mM) and lemuru fish oil (141.42 mM). It is concluded that different sources of unsaturated fatty acid supplementation had no influence in protozoa population, rumen activity, and urinary allantoin, but could improve the rate of VFA.
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Judul: Pengaruh rasio pemberian pakan yang berbeda terhadap produksi VFA dan NH3 rumen serta kapasitas lambung domba lokal jantan
Abstrak: The objective of this experiment was to different the VFA and NH3 production of rumen and stomach capacity of local male sheep. This experiment had held on March until may 2008. This experiment used complete randomized design and descriptive with three treatments and three replication. Significant differences among treatments further tested with Duncant test. This research used 9 local ram with two dietary treatments included: 80% grass and 20% complete feed for two months (PI), 20% grass 80% complete feed for two months (P2), 20% grass and 80% complete feed for one months and 80% grass and 20% complete feed for one months (P3). This treatment have done in two months of study. The main goal of in this research is to discover the effect of not different feed ratio to VFA and NH3 production rumen, and stomach capacity local male sheep. The treatment give not effect to volatile fatty acid and NH3 local male sheep, the results showed that relative volume of total stomach and weights of tissue to empty body weight were not significantly differents, weights of tissue retikulu-rumen, omasum and abomasum.
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Judul: Closed Knight’s Tour pada Papan Catur Berbentuk Persegi Panjang dengan Ukuran Maksimal 8 × 8
Abstrak: Closed Knight’s Tour merupakan langkah kuda yang mengunjungi setiap kotak pada papan catur tepat satu kali dengan langkah kuda berawal dan berakhir pada kotak yang sama. Graf yang terbentuk dari closed knight’s tour dinotasikan sebagai graf G(m,n), dengan m adalah banyaknya baris dan n adalah banyaknya kolom. Graf tersebut memuat Hamiltonian cycle. Sebuah graf terhubung G adalah graf bipartite jika dan hanya jika graf tersebut tidak memiliki cycle dengan panjang ganjil. Papan catur yang memenuhi syarat cukup untuk memiliki closed knight’s tour adalah papan catur berukuran 5 × 6, 5 × 8, 6 × 6, 6 × 7, 6 × 8, 7 × 8, dan 8 × 8.
Keyword: bipartite, closed knight’s tour, hamiltonian cycle, knight’s tour, teori graf