Judul: Evaluasi tepung bungkil biji karet Hevea brasiliensis yang difermentasi cairan rumen domba sebagai pengganti bungkil kedelai dalam pakan ikan lele Clarias sp.
Abstrak: The study evaluates the utilization of fermented defatted rubber seed meal (FDRSM) as soybean meal replacement on growth performance of catfish Clarias sp. The effect of FDRSM on feed digestibility was observed as well. A thirty day feeding experiment was performed to observe the effect of partial replacement of defatted soybean meal as protein source by FDRSM. Five isonitrogenous and iso energy of diet were used in this experiment. Diet A all plan protein come from SBM. Diet B, C, D and E soybean meal was replaced by FDRSM at the level of 12, 23, 34, and 44% respectively. Cr2O3 were used as a tracer for measuring digestibility. Fish were fed experimental diet three times dialy at satiation level. Growth and feeding performance of fish fed with diets containing 12-23% FDRSM protein replacement was comparable to that of control. Increasing level of FDRSM to more than 23% resulted in a decreased in growth performance and feed digestibility.
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Judul: Evaluasi tepung biji kapuk Ceiba Petandra Gaertn yang difermentasi cairan rumen domba sebagai pengganti bungkil kedelai dalam pakan ikan bawal Collosoma Macropomum
Abstrak: This study aimed to evaluate performance of kapok seed meal (KSM) which has been fermented with sheep rumen liquor as a feed of red belly fish. Treatments consisted of 0% KSM, 10% KSM, 20% KSM, 30% KSM, and 40% KSM. Protein content and amount of energy in each treatment targeted by 33±0,34% and 3800±240 kcal/kg feed. A total of 20 red belly fish (7,84 ± 0,18 gram) was reared for 40 days in 200 L tank, which has been equiped with aeration and recirculation sytem and heater (28 - 30°C). Fish feeding was conducted three times at 08.00, 12:00, and 16:00 (at satiation). The experimental design was a completely randomized design with 5 treatments and triplicate. The results showed that, the amount of feed intake, feed efficiency, protein retention, daily growth rate and survival in KSM 30% not significantly different from controls (P> 0,05). However, the daily growth rate and fat retention in KSM 40% was declining if compared with controls (P<0,05). Conclusion is kapok seed meal as much as 30% can be used as a replacement of soy bean meal in red belly feed,
Keyword: sheep rumen liquor, fermentation, kapook seed meal, Collosoma macropomum, Ceiba petandra Gaertn

Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology