Judul: Pengaruh pemberian bungkil bijji jarak pagar (Jatropha curcas Linn) dalam ransum terhadap persentase bobot organ dalam serta histopatologi hati dan ginjal ayam broiler
Abstrak: Jatropha curcas L. meal contains high crude protein (53-58 %), but this can not be used properly because of curcin and phorbolester contained in the Jatropha. that interfere the protein synthesis in the body. This research was conducted to observe the effect of Jatropha curcas Linn meal in the diet on internal organ (liver, heart, spleen, kidney, bile, gizzard, pancreas and secca) and histopatology of liver and kidney. This research used 96 broilers strain CP 707 which were reared for four weeks. The data internal organ percentage with curcin consumption were analyzed using regression analysis and quantitative descriptive for histopatology.
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Judul: Uji biologis bungkil biji jarak pagar (Jatropha curcas L.) dengan pengolahan ekstrak metanol dan fermentasi menggunakan Rhizopus oryzae serta Trichoderma viride pada ayam broiler
Abstrak: The utilization of Jatropha curcas meal as feedstuff is restricted by anti nutrients such as saponin, protease inhibitor, phytic acid and toxic substances like curcin and phorbolester contained in the Jatropha curcas meal. This experiment was aimed to evaluate the biological value of Jatropha curcas meal treated with methanol extraction and fermentation using Rhizopus oryzae and Trichoderma viride on broiler chickens. The biological test used twenty broiler chickens of four weeks of age and using after Sibbald method (1980). The treatments were P0 (Jatropha curcas meal without treatment), P1 (extracted Jatropha curcas meal using methanol), P2 (fermented Jatropha curcas meal using Rhizopus oryzae), and P3 (fermented Jatropha curcas meal using Trichoderma viride). Design of this study was completely randomized design, with four treatments and four replications. The data were analyzed using Analysis of Variance (ANOVA), and differences among treatments were further tested using Duncan Multiple Range test. The parameters observed were dry matter digestion, nitrogen retention, Apparent Metabolizable Energy (AME), calcium and phosporus absorption. The P1, P2 and P3 treatments highly significantly (P<0.01) reduced the dry matter digestion, AME and phosphorus absorption. The treatments significantly (P<0.05) reduced nitrogen retention, however its did not affect the calcium absorption. The values of dry matter digestion were 21.92% (P1), 8.88% (P2) and 21.88% (P3). The values of nitrogen retention were 36.39% (P1), 12.71% (P2) and 40.14% (P3). The values of apparent metabolizable energy were 1299.23 kcal/kg (P1), 1009.62 kcal/kg (P2) dan 1593.72 kcal/kg (P3). The values of calcium absorption were 41.04% (P1), 22,71% (P2) and 64.63% (P3). The values of absorptin phosphorus were -27.26% (P1), -95.4% (P2) and -3.94% (P3). These low values because of crude fiber contained in the treated Jatropha curcas meal. The conclusion of this experiment was Jatropha curcas meal as a single feedstuff of broiler chickens had low dry matter digestion, nitrogen retention, Apparent Metabolizable Energy, calcium and phosporus absorption. The usage of treated Jatropha curcas meal should be mixed.
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Judul: Pembuatan Film Tipis Cu2ZnSnS4 sebagai Lapisan Penyerap Cahaya pada Sel Surya Menggunakan Metode Elektrodeposisi
Abstrak: Thin film of Cu2ZnSnS4 (CZTS) is an alternative semiconductor used as light absorber layer on solar cell. CZTS can replace silicon that commonly used as commercial semiconductor. The advantage of using CZTS as absorber layer is due to the abundance of its chemical composer on earth, and its high value of absorption coefficient. The absorber layer was made by using electrodeposition method on ITO glass substrates. The films were deposited at room temperature using potentiostatic mode with a potential of –1.05 V for 30, 45, and 60 minutes. After that, the films were annealed at two different temperatures, 180 ºC and 500 °C, for 45 minutes in N2/H2S atmosphere. Based on X-ray diffraction analysis, the polycrystalline thin film obtained fall into kesterite crystal phase. This type of crystal was obtained when the CZTS was annealed at 500 °C in H2S/N2 atmosphere. The value of optical band gap energy for the CZTS thin film was 2.2 eV with the film thickness about 1.228–6.366 μm. The sample of CZTS with electrodeposition time of 45 minutes and annealing temperature of 500 °C showed the best result and in conformity with absorber layers criteria for solar cells.
Keyword: semiconductor, ITO glass, CZTS thin film, electrodeposition