Judul: Perdagingan dan Distribusi Daging Kerbau Rawa dan Sapi Peranakan Ongole yang Digemukkan Menggunakan Ransum dengan Suplementasi Campuran Garam Karboksilat Kering
Abstrak: Swamp buffalo is commonly regarded as an animal with relatively low productivity. The objective of the study was to examine the meat yield and it’s distribution within carcass from Swamp buffalo and Ongole Grade cattle fed concentrate containing protected lemuru fish oil in the form of dry carboxylate salt mixture (DCM). Fourteen animal were used in the study comparising eight Ongole Grade cattle and six Swamp buffalo. Each group of animal was allotted to control ration and control ration plus DCM. They were set up in a factorial design with species and ration as the factors. The result showed that administration of protected lemuru fish oil in the ration did not obviously influence meat yield and each distribution carcass. However Swamp buffalo had significantly higher slaughter weight but lower carcass weight (P<0,05). The Swamp buffalo carcass yield were significantly lower weight of striploin, tenderloin, silverside and topside if compared to Ongole Grade cattle.
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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: Nanokristalin Pirit (FeS2) sebagai Material Semikonduktor Fotovoltaik.
Abstrak: Teknologi fotovoltaik adalah suatu proses yang dapat mengubah sinar matahari menjadi energi listrik dengan media semikonduktor. Penggunaan sel surya untuk fotovoltaik hanya dapat mengonversi radiasi matahari menjadi energi listrik kurang dari 20%. Efisiensi akan meningkat ketika material semikonduktor untuk fotovoltaik dibuat menjadi ukuran nano. Pirit merupakan salah satu material semikonduktor fotovoltaik yang memiliki energi pita celah (Eg) dalam kisaran 0.8–0.95 eV. Energi pita celah tersebut terbukti meningkat ketika disintesis dengan metode hidrotermal menggunakan beragam molar [S]:[Fe] pada suhu 200 °C dalam 24 jam. Nilai energi pita celah yang dihasilkan adalah 1.58–2.073 eV. Ukuran nanokristalin pirit yang dihasilkan berada pada kisaran 21.04–58.77 nm menurut data Particle Size Analyzer. Besarnya ukuran nanokristal pirit yang tumbuh kurang dari 50 nm merupakan poin penting untuk aplikasi fotovoltaik.
Keyword: Hidrotermal, fotovoltaik, nanokristal, pirit