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: Kadar VFA dan N - NH3 rumen dan sekum domba yang diberi ransum berbahan dasar rumput lapangan dengan level ampas tahu yang berbeda
Abstrak: Penelitian ini dilakukan di Labolatorium Ilmu Produksi Ternak Ruminansia Kecil dan Labolatorium Ilmu Makanan Ternak, Fakultas Peternaken, Institut Pertanian Bogor, selama empat bulan mulai dari tanggal 18 Nopember 1986 sampai dengan tanggal 18 Maret 1987. Tujuan penelitian ini adalah untuk mengetahui kadar VFA total (Volatile Fatty Acid/Asam Lemak Atsiri/Asam Lemak Terbang) dan N-NH, (N-Amonia) cairan rumen dan sekum domba yang mendapat ransum berbahan dasar rumput lapangan (diberikan ad libitum) dengan ampas tahu dalam jumlah yang berbeda, yang diukur 24 jam setelah pemberian ransum dengan pemuasaan selama 16 jam. Rancangan Percobaan yang digunakan dalam penelitian ini adalah "Mixed Model Least-Squares and Maximum Likeli- hood" menurut Harvey, dengan empat perlakuan dan ulangan yang tidak sama. Dalam penelitian ini digunakan 16 ekor domba lokal jantan lepas sapih. Perlakuan yang diterapkan adalah pemberian ampas tahu kering matahari pada tingkat 0, 100, 200 dan 300 g/ekor/hari sedangkan rumput lapangan kering matahari diberikan ad libitum. Pemuasaan ransum dilakukan selama 16 jam yaitu mulai jam. 17.00 sampai jam 09.00. Hasil penelitian menunjukan bahwa pemberian tingkat ampas tahu yang berbeda, tidak menimbulkan perbedaan terhadap produksi VFA total dan N-NH cairan rumen atau sekum domba yang diukur 24 jam setelah pemberian ransum dengan pemuasaan selama 16 jam. Produksi VFA total cairan rumen (189.20±9.14 mM/L) lebih tinggi (P0.05) dari sekum (153.00 + 8.51 mM/L) pada pemberian tingkat ampas tahu ransum yang sama. Produksi N-NH3 cairan sekum (20.32 + 2.80 mM/L) cecderung lebih tinggi dari rumen (11.25 + 1.98 m/L) pada pemberian tingkat ampas tahu ransum yang sama…
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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