Judul: Produktivitas Kambing Peranakan Etawah Jantan dan Betina dengan Pemberian Ransum Grower Komplit Tinggi Energi dan Protein
Abstrak: Etawah goats in growing phase require a complete and balance nutrition for growth and preparation for reproduction phase, especially energy and protein. This research aimed to compare the productivity of Etawah growing kids fed with high energy and proteins complete rations based on NRC (2006). This research used 4 male and 4 female goats at 4 months age with initial body weight of 11.38±3.15 kg and 12.13±2.70 kg, respectively the data were analyzed with TTest with 2 treatments (male and female) and 4 groups. Concentrate and forages ratio was 90% and 10% from total feed. Parameters in this research were dry matter intake, body weight gain, protein efficiency ratio, and feed conversion ratio. Statistical analysis showed that no significant results for dry matter intakes (g day- 1), but body weight gain (g day-1), feed conversion ratio and protein efficiency ratio of male goats was significantly (P<0.05) better than female group. These results indicated that consumption and body weight gain were in line with NRC (2006) recomendation so as to the implementation in Indonesia needs to be further investigated.
Keyword: Bogor Agricultural University (IPB), performance, high energy protein rations, feed conversion, etawah growing kids

Judul: Konsumsi dan Pertumbuhan Kambing Peranakan Etawa Periode Prasapih yang diberi Ransum Strater dengan Cara Bebas Pilih
Abstrak: One of the ways to satisfy the needs of livestock, But befitting with a preferred feed livestock is to use the cafeteria feeding system. The cafeteria feeding give opportunity for animal to choose his favorite feed ingredients. The research worked on two groups of goat kids (6 goat kids) fed a starter ration mix and cafeteria feeding. The observed variables were body weight gain, feed intake, consumption of nutrients, and feed efficiency. This study aims to provide information feedstuffs favored by the kid and get a starter ration composition using the cafeteria feeding system. The results showed a propensity to consume pollard and soybean meal. The cafeteria feeding system generates the following composition of feed ingredients pollard (49.62%), corn (2.41%), soybean meal (20.96%), cassava (23.56%), and coconut meal (3.45%). The performance of the two treatments is cafeteria feeding and mix body weight 10.67 (kg) and 11.177 (kg) and feed efficiency of 0.48 and 0.46.
Keyword: Bogor Agricultural University (IPB), starter fed., etawa breed goat, goat kids, cafeteria feeding, Animal welfare

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