Judul: Pengaruh rasio pemberian pakan yang berbeda terhadap produksi VFA dan NH3 rumen serta kapasitas lambung domba lokal jantan
Abstrak: The objective of this experiment was to different the VFA and NH3 production of rumen and stomach capacity of local male sheep. This experiment had held on March until may 2008. This experiment used complete randomized design and descriptive with three treatments and three replication. Significant differences among treatments further tested with Duncant test. This research used 9 local ram with two dietary treatments included: 80% grass and 20% complete feed for two months (PI), 20% grass 80% complete feed for two months (P2), 20% grass and 80% complete feed for one months and 80% grass and 20% complete feed for one months (P3). This treatment have done in two months of study. The main goal of in this research is to discover the effect of not different feed ratio to VFA and NH3 production rumen, and stomach capacity local male sheep. The treatment give not effect to volatile fatty acid and NH3 local male sheep, the results showed that relative volume of total stomach and weights of tissue to empty body weight were not significantly differents, weights of tissue retikulu-rumen, omasum and abomasum.
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Judul: Performa domba jantan lokal dengan perlakuan pakan yang berbeda selama dua bulan penggemukan
Abstrak: The aims of this study were to observe the performance of local male sheep, fed with experimental diets which were differentiated according the ratio of complete ration and grass (Brachiaria hurnidicola). The 12 local male sheep under one year old with average body weight of 15.87 1.00 kg (CV = 7.15%) were used in this study and allotted to the four experimental ration there were P1 (Complete feed 20% : Brachiaria humidicola 80%); P2 (Complete feed 80% : Brachiaria humidicola 20%); P3 (Complete feed 80% : Brachiaria humidicola 20% was given in the first month of the experiment then followed by Complete feed 20% : Brachiaria hurnidicola 80% for following month). The parameters measured were body weight gain, feed consumption, feed conversion ratio and Income Over Feed Cost. Randomized Complete Design were used in this experiment and the data were analyzed with analysis of variance (ANOVA). The result showed that the experimental treatment significantly (Pi0.05) affected daily feed consumption but the were no differences between treatments on body weight gain as well as feed conversion ratio. The highest profit was found in P2
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Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4