Judul: Performa Kerbau Rawa dan Sapi Peranakan Ongole yang Digemukkan Secara Feedlot Menggunakan Ransum yang Disuplementasi Minyak Ikan Lemuru Terproteksi
Abstrak: The study was aimed to examine the performance of local cattle and buffalo fattened in feedlot which using ration suplemented by protected Lemuru fish oil in the form of dried carboxylate salt mixture (DCM). Eight onggole grade cattle and six local swamp buffalo were used in this study. They were assigned to 2x2 factorial model with two level animal class (cattle and buffalo) and two level ration (suplemened and non suplemened ration with dried carboxylate salt). The results of this study showed that the feed consumption, nutrient intake, and daily gain were not affected by the interaction between animal class and ration. The feed consumption, nutrient intake, and daily gain of the buffaloes had significantly higher (P<0,05) than Peranakan Ongole cattle. However, the feed convertion and income over feed cost were not influenced by animal class and ration or their interaction effects. It was concluded that at similar maturity the local buffalo performed better than local cattle (PO) when fattened in feedlot.
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Judul: Kandungan Nutrisi dan Asam Lemak Daging Kerbau Rawa dan Sapi Peranakan Ongole yang Digemukkan dengan Suplementasi Campuran Garam Karboksilat Kering
Abstrak: Buffalo is a potential meat producing animal. There is an increasing demand of buffalo meat in Indonesian. The study was aimed to examine the fatty acids composition and chemical characteristic of meat from cattle and buffalo fatten on feedlot ration supplemented by protected lemuru fish oil in the form of dried carboxylate salt mixture (DCM). The research used six swamp buffalo and eight Ongole grade cattle. They were assigned to 2x2 factorial model with two animal species (cattle and buffalo) and two level ration (suplemented and not supplemented ration with dried carboxylate salt).The results of this study showed that swamp buffalo and Peranakan Ongole cattle fatten on feedlot ration using protected lemuru fish oil in the form of DCM, produced meat with similar chemical characteristic. Meanwhile, they were significant interaction between ruminant species and ration on fatty acid composition. In buffaloes the addition of the protected lemuru fish oil could significantly decreased (p<0,05) the saturated fatty acid but significantly (p<0,05) increased the unsaturated fatty acid in meat. However, this was not the case for cattle.
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Judul: Solusi Geometri Schwarzschild untuk Dimensi 4+1 dengan Invarian Rotasi Isotropik
Abstrak: Metrik Schwarzschild merupakan solusi eksak pertama dari persamaan medan Einstein dengan mangasumsikan metrik statik dan simetris. Metrik Schwarzschild yang ditemukan oleh Karl Schwarzschild masih dalam dimensi 3+1, namun seiring dengan teori-teori terbaru yang menunjukkan bahwa alam semesta tidak hanya di dimensi 3+1. Maka melalui penambahan dimensi, tujuan penelitian ini memperoleh solusi pada geometri Schwarzschild untuk dimensi 4+1 dengan memodifikasi koordinat bola yang invarian rotasi isotropik dan melalui penurunan rumus seperti koordinat bola, simbol Christoffel, dan tensor Ricci. Selain mendapatkan solusi ini, metrik Schwarzschild dimensi 4+1 dapat digunakan sebagai metrik dasar untuk memperoleh solusi blackhole dan wormhole pada dimensi 4+1. Hasil akhirnya, dengan memanfaatkan modifikasi koordinat bola, metrik Schwarzschild dapat dibentuk sehingga diperoleh solusi geometri Schwarzschild untuk dimensi 4+1.
Keyword: metrik Schwarzschild, persamaan medan Einstein, modifikasi koordinat bola, penambahan dimensi, invarian rotasi isotropik