Judul: The Relative Superiority of Milk ProductioD of Priangan Cross with St.Croix and Moulton Charollais Sheep.
Abstrak: Priangan sheep is one of some native sheep that had been well known to the people of West Java. This sheep have some advantages including their ability to produce multiple birth, reach sexual maturity faster and resistant to internal parasite. However, this sheep have also some disadvantages including low milk production, high bawl mortality and low mature weight Crossbreeding is one way to improve the genetic qnality of this sheep. The objective of this study is to evalnate whether the Priangan, St.Croix, and Moulton Charollais cross are superior in milk production when compared to Priangan sheep. This study was conducted at small rwninant experimental station of Research Institute for Animal production from June to August 2002. The superiority of the crossed sheep was detennined by subtracting the average milk production of the crossed sheep and Priangan sheep and then divided the values by the average milk production of Priangan sheep. The data had heen corrected by parity and type of birth. The General Linear model of SAS were used to calculate the least square means. The result shows that the superiority of Moulton Charollais-Priangan cross (MP), St.Croix-Priangan cross (HP), StCroix-Moulton Charollais crossing (MHP) for milk production were 59.48 (11%), 55.89 (5%) and 54.66 I (2%), respectively when compared to Priangan. However, the Moulton Charollais-St.Croix-Priangan cross (MHP) had lower milk production (44.87 I or -16%) when comprued to Priangan. Key words: milk production, St. Croix, Moulton Charollais, Priangan, crossing
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Judul: Genetic evaluation of priangan sheep and its crossbred with St. Croix and Moulton Charollais
Abstrak: Domba Priangan (P) memiliki keunggulan jumlah anak sekelahiran tinggi, dapat beranak sepanjang tahun, cepat dewasa kelamin dan resisten terhadap parasit internal. Namun demikian, domba ini memiliki kelemahan produksi susu terbatas, sehingga daya hidup dan laju pertumbuhan anak rendah. Untuk mengatasi masalah tersebut telah dilakukan persilangan dengan domba St. Cmix (menghasilkan domba HP) dan Moulton Charollais (menghasilkan domba MP), kemudian persilangan dilanjutkan untuk membentuk domba komposit tiga bangsa MHP (MP X HM) dan HMP (HP X MP) dengan komposisi gen 50% P : 25% M dan 25% H). Diharapkan hasil persilangan masih memiliki jumlah anak yang tinggi dengan laju pertumbunan anak yang cepat sehingga produktivitas induk meningkat.
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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