Judul: Pengaruh Tingkat Pemberian Protein Ransum Terhadap Laju Pertumbuhan Dan Komposisi Karkas Domba Priangan
Abstrak: A research about the effect of dietary protein level on the growth rate and carcass composition of Priangan Sheep was carried out at the Faculty of Animal Husbandry, Padjadjaran University, Jatinangor-Sumedang, from July 21 to November 15, 1991. Twenty four Priangan Sheep 6-7 month old and 11-12 kilogram of body weight were used in this experiment, in Completely Randomized factorial design with three dietary protein levels ( 13.35; 16.46 and 19.40) %, Four slaughter weight 13, 15, 17 and 19 kg and two replication of each variables in this experiment are body weight gain, feeding period, dry matter intake, protein intake and carcass composition. The Regression Analysis Allometric Huxley were used to follow the growth and development of body composition, The results of this study, that the protein level of ration at 13.35; 16.46, and 19.40 per cent were not significantly different body weight gain, dry matter consumption and efficient use of rations, but significantly different (P> 0.5) for protein intake ration. Protein levels of 13.35; 16.46 and 19.40 per cent, giving a coefficient of relative growth vary in development time, which is to empty body weight, carcass weight, meat weight, fat weight, tissue weight, oval weight the slaughter weight to provide value b> 1. The growth rate increased with increasing relative slaughter weight, high growth potential and growth, including late maturing period, the percentage of relative growth increases with the slaughter weight. As for the bone weights, gastrointestinal weight and body weight beyond providing value b <1 the slaughter weight. The growth rate decreases with increasing relative slaughter weight, low growth potential and a growth include early maturing, the percentage of relative growth decreases with increasing slaughter weight.
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Judul: Pengaruh jenis kelamin dan pengelompokan bobot potong terhadap komposisi karkas domba lokal Priangan
Abstrak: Suatu penelitian tentang pengaruh jenis kelamin dan pengelompokan bobot potong terhadap komposisi karkas (dan juga komposisi tubuh) domba lokal Priangan dilakukan di Departemen Ilmu Produksi Ternak Fakultas Peternakan IPB. Penelitian dilakukan dari 6 April 1980 sampai dengan 29 Janu ari 1981. Analisis data dilakukan dengan klasifikasi dwi-arah dengan anak sampel. Sebagai perlakuan adalah jenis kelamin dan pengelompokan bobot potong (15.00, 16.50 .. 26.57). Bobot potong yang satu dengan berikutnya berjenjang 10 persen (Bj = 15.00 kg (1+ 0.10 )j -1; j=1,2, .... 7). Tekhnik pemotongan seri dilakukan terhadap domba teracak dengan mengikuti tatacara Natasasmita (1978). Analisis re grasi setelah sidik ragam dilakukan untuk pendekatan pada persamaan alometrik Huxley seperti dilakukan Natasasmita (1978). Interpretasi terhadap kriteria pertumbuhan perkem bangan, waktu perkembangan dan potensi pertumbuhan dilakukan melalui pengujian terhadap hipotesis Hø : b = ø dan Hø : b = 1. Sebanyak 42 ekor domba lokal priangan terlibat dalam penelitian, yaitu 21 ekor domba jantan (11.86 1.31 kg) dan 21 ekor domba betina (11.10 1.37 kg) de ngan umur 68 bulan. Selama penelitian domba diberi pakan formula Sugana et al (1979) terdiri rumput lapangan ke ring matahari (10.63 protein kasar) dan konsentrat (14.31 protein kasar) yang mengandung 30 persen tinja ayam kering. Pakan diberikan secara ad libitum. Hasil penelitian menunjukkan (1) pada rentangan bobot potong 15.00 26.57 kg, bobot dan persentase bobot karkas domba lokal Priangan betina lebih besar dari pada domba jantan. Sebaliknya, pada bobot potong yang sama, bobot komponen non-karkas domba betina lebih rendah dari pada domba jantan. (2) Pertumbuhan karkas tergolong masak lambat dengan potensi pertumbuhan yang tinggi, sementara pertumbuhan komponen non-karkas tergolong masak dini sampai sedang. (3) Pertumbuhan tulang tergolong masak dini, fasia masak sedang dan daging maupun lemak tubuh termasuk masak lambat. Dua komponen tubuh tersebut terakhir tadi memiliki potensi pertumbuhan yang tinggi. (4) Bobot daging, lemak dan tulang karkas domba lokal Priangan jantan relatif sama dengan komponen serupa pada domba betina. (5) Bo bot optimal domba lokal Priangan betina dicapai pada bobot yang lebih rendah dari pada bobot optimal domba jantan. (6) Dari berbagai data dapat disimpulkan bahwa domba lokal Priangan memiliki potensi pedaging yang tinggi. ...
Keyword: Sheep, Sex sheep, Carcasses

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