Judul: Pengaruh Perlakuan Kimiawi dan Biologis terhadap Penyusutan Bahan, Kandungan Antitripsin, Lektin dan Nutrien Bungkil Biji Jarak Pagar (Jatropha curcas L.)
Abstrak: The Jatropha curcas meal is by product of Jatropha curcas oil production and contain high amount of nutrient (56-68% protein). The problem in using of Jatropha curcas meal as feed is its antinutritive content and toxic compounds such as lectin (curcin) and trypsin inhibitor. This experiment was conducted to evaluate the effectiveness of chemical and biological methods in decreasing or eliminating antinutrient content and to know the change of nutrient content due to processing of Jatropha curcas meal. This research consisted of four treatments : P0 (control, non treated meal), P1 (methanol 90% extraction, with the proportion of meal and methanol was 1:4), P2 (fermentation using Rhizopus oryzae) and P3 (fermentation using Trichoderma viride). The parameters observed were weight loss, trypsin inhibitor, lectin activity and nutrient content. The data were analyzed with descriptive analysis. The results showed that chemical and biological treatments decreased the weight with the values P1 (3.18%), P2 (14.44%) and P3 (3.7%). The results showed that fermentation using Rhizopus oryzae was the most effective in decreasing the activity of trypsin inhibitor (67.95%). However, this treatment decreased protein content (9.39%), increased crude fiber (35.73%) and it did not influence lectin activity. The fermentation using Trichoderma viride was the most effective in degrading lectin activity with the value of 50% compared to the untreated meal. The conclusion of this experiment is that fermentation Jatropha curcas meal using Rhizopus oryzae could decrease the trypsin inhibitor up to 67.95% and the fermentation Jatropha curcas meal using Trichederma viride could decrease lectin activity up to 50%.
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Judul: Kandungan nutrisi, fermentabilitas, dan kecernaan in vitro bungkil biji jarak pagar (Jatropha curcas L.) terdetoksifikasi
Abstrak: Jatropha curcas meal has a great potential as animal feedstuff. So far, there are no approriate detoxification methods available. Curcin and phorbolester are the main toxic compounds that could be eliminated by physical, chemical and biological methods. However, the treatment is economically not feasible. Alternative detoxification method using turmeric and alhali had been done. Three origins of indonesia jatropha curcas (Lampung=L, Kebumen=K, and Lombok Timur-LT) were used to investigate the effect of five levels detoxivication methods.
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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.