Judul: evaluasi potensi genetik sifat pertumbuhan pejantan kambing PE dan Saanen di balai penelitian ternak, Ciawi- Bogor
Abstrak: Etawah Grade (EG) and Saanen goats are two types of small ruminant commonly raised for producing milk in Indonesia. Milk yield can be increased by doing selection programs based on breeding value (EBV) in order to obtain superior bukcs. The objective of this research was to evaluate the genetic quality growth trait of EG and Saanen bucks at the Research Institute for Animal Production (RIAP), Ciawi-Bogor. This research used 136 kids from 8 EG buks and 48 kids from 2 Saanen bucks from RIAP, Ciawi-Bogor. The data came from the recording in 2006 until 2009. Variables measured were birth weight and weaning weight then analyzed by t-test, weaning weight data were standardized to the age of 120 days and corrected to the type of single births and male (Saanen), and corrected to the type of twin births and female (EG). Heritability was calculated by the method of paternal half sibs, and the value of breeding (Breeding Value) was calculated by the Contemporary Comparison method. The results showed that male EG birth weight was 3,20±0,67 kg, while female birth weight was 2,87±0,60 kg. Male Saanen birth weight was 3,31±0,39 kg, while female birth weight was 2,98±0,39 kg. Etawah Grade birth weight in single birth was 3,28±0,69 kg and twins was 2,83±0,53 kg. Saanen birth weight in single birth was 3,33±0,69 kg, and twins was 2,94±0,21 kg. Heritability of EG birth weight and weaning weight were classified as high (0,50±0,34 and 0,56±0,36). Heritability of Saanen birth weight was 0,36 ± 0,68, this value was classified as moderate. Etawah Grade bucks with high breeding value (BV) was the identity number 261 (0,77), whereas that in Saanen buck was the identity number 9021 (0,49).
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Judul: Keragaan Kualitas Susu Segar dan Mentega Berdasarkan Genotipe Gen GH dari Kambing Saanen dan Peranakan Etawah (PE)
Abstrak: Hormon Pertumbuhan (Growth Hormone/GH) merupakan hormon yang disekresikan oleh kelenjar hipofisis serta memainkan peranan penting dalam laktasi. Tujuan penelitian ini adalah untuk menganalisis kualitas susu segar (lemak, protein, BJ dan bahan kering), mempelajari karakteristik mentega dari kambing Saanen dan Peranakan Etawah (PE) serta menganalisis pengaruh keragaman gen GH terhadap kualitas susu. Evaluasi DNA dari 89 kambing (Saanen dan PE) menggunakan metoda Single-strand Conformation Polimorphysm (SSCP) untuk mengidentifikasi polimorfisme pada gen hormon pertumbuhan kambing (gGH). Amplifikasi gen GH exon 4 pada kambing perah (Saanen dan PE) menghasilkan ruas DNA sepanjang 200 bp. Berdasarkan hasil SSCP pada gen GH mendapatkan lima pita DNA yang menunjukkan pola migrasi yang berbeda, disebut tipe gen CE, BC, CD, BB dan CC. Gen CD hanya dijumpai pada bangsa kambing Saanen sedangkan tipe gen CC hanya terdapat pada kambing PE. Keragaman genotipe ini tidak berpengaruh terhadap kualitas susu kedua bangsa kambing Saanen dan PE. Keragaman genotipe gen GH juga tidak berpengaruh terhadap karakteristik mentega susu kambing Saanen.
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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