Judul: Pemanfaatan Sekam Padi yang Difermentasi Rhizopus oligosporus dalam Pakan terhadap Pertumbuhan Ikan Nila
Abstrak: This research evaluated the effect of rice husk fermented by Rhizopus oligosporus utilization in feed on the growth, feed efficiency and feed digestibility of Nile tilapia (Oreochromis niloticus). The fish with an initial body weight of 10.00 ± 0.01 g were reared for 60 days in aquaria with the size of 100x40x60 cm3. Fish were fed with diets containing fermented rice husk meal at different concentration, i.e. 0%, 2.5%, 5%, 7.5%, and 10%, respectively. The fish were fed to satiation with frequency three times a day. The results showed that utilization of the fermented rice husk in feed did not affect the average weights, feed consumption, fat retention, daily growth rate, survival, and feed efficiency (P > 0.05). However, the utilization of fermented rice husk in feed affected energy digestibility, protein digestibility, and protein retention (P < 0.05). Based on the results, utilization of fermented rice husk in the feed gave the same result. Utilization of rice husk up to 10% was still in the range of optimum because it resulted in similar daily growth rate and feed efficiency as the control of Nile tilapia.
Keyword: rice husk, Rhizopus oligosporus, fermentation, growth, Nile tilapia

Judul: Efektivitas Penggunaan Sekam Padi yang Difermentasi Trichoderma reesei dalam Pakan terhadap Pertumbuhan Ikan Nila
Abstrak: Penelitian ini mengevaluasi efektivitas tingkat penggunaan sekam padi yang difimentasi Trichoderma reesei dalam pakan terhadap pertumbuhan, efisiensi, dan kecemaan pakan pada ikan nila (Oreochromis niloticus). Ikan nila dengan bobot rata-rata 6,58±0,01 gram dipelihara dalam akuariian berukuran 60x50x40 cm³ yang dilengkapi sistem resirkulasi selama 60 hari. Ikan uji diberi lima jenis pakan yang mengandung sekam padi difermentasi T. ressei sebagai pengganti dedak halus masing-masing sebesar 0%, 2,5%, 5%, 7,5%, dan 10%. Pemberian pakan dilakukan secara at satiation sebanyak tiga kah sehari Hasil penelitian menunjukkan bahwa mai efisiensi pakan dan retensi lemak dari setiap perlakuan tidak berbeda nyata. Peningkatan mai kecemaan protein, kecemaan energi, dan retensi protein tertinggi ditunjukkan pada pakan yang mengandung sekam padi fermentasi sebesar 7,5% yaitu secara bertaut-turut 88,71±0,23%, 82,29±0,43%, dan 21,21±0,60% Penambahan sekam padi fermentasi 7,5% pada pakan juga meningkatkan laju pertumbuhan harian ikan nila yaitu sebesar 2,17±0,07%. Dengan demikian, penggunaan sekam padi fermentasi 7,5% efektif untuk pertumbuhan ikan mla….
Keyword: Growth, Oreochromis niloticus, rice husk, Trichoderma reesei, Feed efficiency, Nile tilapia, Digestibility, Fish feeding, Recirculation system, Satiation method

Judul: Pelabelan Super Vertex Magic
Abstrak: Super vertex magic labeling is labeling on graph with is a set of edges mapped into and is a set of vertices mapped into . It has a vertex magic labeling in which and represents the size and order of the graph respectively. This manuscript proves that paths, cyclics, and disjoint union of cyclics have a super vertex magic labeling. There are four theorems to be discussed. The first theorem proves that path is super vertex magic if and only if is odd and . The second theorem proves that cyclic is super vertex magic if and only if is odd. The third theorem proves that bijection function from an edge set onto of graph can be extended to a super vertex magic labeling if and only if the set amount of edge label that incidents with a vertex in the graph, consists of sequential integers as many as vertices in the graph. The fourth theorem proves that disjoint union of the cyclics consists of cyclics with each cyclic has vertices is super vertex magic if and only if and are odd.
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