Judul: Penambahan Cocktail Enzyme pada Kulit Buah Kakao, Tongkol Jagung, dan Bungkil Biji Karet yang Digunakan sebagai Bahan Baku Pakan Ikan Gurame
Abstrak: The aim of this research was to increase the digestibility of local feedstuff (cocoa pods, corn cobs, and rubber seed) by the addition of cocktail enzyme. Fish used in this study was giant gourami Osphronemus goramy with an average body weight of 20,65±0,75 g. Cocktail enzyme used was a mixture of enzymes, which consisted of xylanase, manannase, ligninase, and pectinase. Previously milled feedstuff was incubated with cocktail enzyme at a concentration of 2 g/kg material at room temperature for 24 hours. Subsequently, the incubated feedstuffs were dried, mixed with reference diet with a ratio of 30:70 and Cr2O3as a marker at a concentration of 0,5%, and used as the feed for digestibility test. Feeding was performed for 15 days and the feces were collected since the 6th day. The results show that the addition of cocktail enzyme could increase crude protein content of feedstuff with a range of 10-55%, and decrease crude fiber content of cocoa pods and corn cobs meals with a range of 17-41%. Furthermore, cocktail enzyme could also increase the feed digestibility by the giant gourami.
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Judul: Evaluasi kecernaan bungkil biji karet, kulit buah kakao, dan bonggol jagung yang difermentasi dengan cairan rumen domba pada pakan ikan nila
Abstrak: Penelitian ini bertujuan untuk mengevaluasi kecernaan bahan bungkil biji karet, Kulit buah kakao, dan bonggol jagung yang difermentasi dengan cairan rumen domba pada pakan ikan nila. Cairan rumen domba disaring kemudian digunakan intuk fermentasi bahan uji yaitu bungkil biji karet, kulit buah kakao, dan bonggol gung dengan konsentrasi 400mL/kg bahan selama 24 jam. Bahan yang belum dun sudah difermentasi kemudian digunakan untuk uji biologis dengan komposisi 10% bahan uji, 67,5% pakan komersial, 0,5% Cr:O, dan 2% binder. Ikan nila dengan ukuran rata-rata 7,310,267g/ekor digunakan sebagai ikan uji dan diberi kan perlakuan selama 20 hari dengan pengambilan feses dimulai pada hari keenam. Hasil penelitian menunjukkan bahwa fermentasi dapat meningkatkan Radar protein semua bahan sebesar 13,72-50,09%, dan menurunkan serat kasar semua bahan sebesar 20,83-28,05% kecuali pada bungkil biji karet. Hasil uji ologis pada ikan nila menunjukkan bahwa fermentasi dapat meningkatkan Recernaan protein, kecernaan energi, dan kecernaan total ketiga bahan yang diuji.
Keyword: Rubber seed, Cocoa pod, Corncob, Fermentation, Digestibility

Judul: Truncated Stop Loss as a Optimal Solution of Reinsurance Agreement in One-Period Model
Abstrak: Reinsurance is one of risk management efforts of an insurance company, which is called the cedent. Similar with insurance, reinsurance constitutes the cedent to pay the premium. We consider one-period reinsurance model and derive a rule which minimizes the ruin probability of the cedent for a fixed reinsurance premium. Therefore, it is needed to construct an optimal reinsurance agreement for the cedent. The premium is calculated according to four different principles, i.e. economic, generalized zero-utility, Esscher, and mean-variance principles. Stop loss is a reinsurance contract which protect the insurance company for losses that exceed a certain amount. The result of this research shows that a truncated stop loss is an optimal agreement in the class of all reinsurance contracts with various premiums calculated using above mentioned principles.
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