Judul: Evaluasi Kualitas dan Kecernaan Kulit Singkong, Biji Karet, Kopra, Biji Kapuk, dan Palm Kernel Meal Difermentasi Saccharomyces cerevisiae pada Juvenil Ikan Nila Oreochromis
Abstrak: Feed becomes the most expensive factor in freshwater aquaculture production. It often costs from 45% to 85% of total variable expensis, depending on its intensity of culture operation. The high price is caused by materials which used in this operation. The materials availability still rely on imports such as fish meal, soybean meal, and flour. This makes price of feedstuff is not competitive. Therefore, an alternative local’s feedstuffs which could potentially reduce or even replace imported feedstuff composition in diets is needed. However, the low quality of local’s feedstuffs nutrition make it difficult to developed. This low quality caused by high crude fiber content and the presence of anti-nutritional substances factor, so it needs to be processed first by fermentation methods. This study used five treatments, two factors, and one replicates. Fish used in this study were juvenile of nile tilapia Oreochromis niloticus which has weight about 16,26±2,43 grams. Diets given at satiation, three times a day. The feedstuffs used are cassava peel, rubber seed, cottonseed, copra, and (Palm Kernel Meal, PKM). The result of this study showed some enhancements in fish content. The fermentation by Saccharomyces cerevisiae can increase fish (test material) protein around 16,85%-31,11%, decrease crude fiber around 2,46%-31,65%, increase protein digestibility around 0,25%-11,7%, increase digestibility of energy around 4,29%-11,17% (except for digestibilty in the cassava peel) and also increase the digestibility of feedstuffs around 1,37%-61,19% in juvenile of nile tilapia O. niloticus.
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Judul: Evaluation of quality and digestibility of cassava peel, rubber seed, copra, cottonseed, and palm kernel meal fermented by Saccharomyces cerevisiae in juvenile of nile tilapia Oreochromis niloticus.
Abstrak: Feed becomes the most expensive factor in freshwater aquaculture production. It often costs from 45% to 85% of total variable expensis, depending on its intensity of culture operation. The high price is caused by materials which used in this operation. The materials availability still rely on imports such as fish meal, soybean meal, and flour. This makes price of feedstuff is not competitive. Therefore, an alternative local’s feedstuffs which could potentially reduce or even replace imported feedstuff composition in diets is needed. However, the low quality of local’s feedstuffs nutrition make it difficult to developed. This low quality caused by high crude fiber content and the presence of anti-nutritional substances factor, so it needs to be processed first by fermentation methods. This study used five treatments, two factors, and one replicates. Fish used in this study were juvenile of nile tilapia Oreochromis niloticus which has weight about 16,26±2,43 grams. Diets given at satiation, three times a day. The feedstuffs used are cassava peel, rubber seed, cottonseed, copra, and (Palm Kernel Meal, PKM). The result of this study showed some enhancements in fish content. The fermentation by Saccharomyces cerevisiae can increase fish (test material) protein around 16,85%-31,11%, decrease crude fiber around 2,46%-31,65%, increase protein digestibility around 0,25%-11,7%, increase digestibility of energy around 4,29%-11,17% (except for digestibilty in the cassava peel) and also increase the digestibility of feedstuffs around 1,37%-61,19% in juvenile of nile tilapia O. niloticus.
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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.