Judul: Analysis of Carcass Weight Percentage and Commercial Cuts of Chickens Crossed with IPB-D2 Chicken and IPB-D3 Chicken and their Reciprocals
Abstrak: Peningkatan mutu genetik ayam lokal telah dilakukan dengan mengembangkan ayam IPB-D1 sebagai rumpun baru ayam lokal unggul yaitu IPB-D2 dan IPB-D3. Ayam IPB-D2 sebagai calon galur yang memiliki titer antibodi tinggi dan ayam IPB-D3 memiliki pertumbuhan yang cepat. Pertumbuhan bobot badan yang cepat akan memengaruhi persentase karkas dan potongan komersial. Penelitian bertujuan untuk mengkaji respon produksi karkas antar persilangan. Data yang diperoleh dalam penelitian ini dianalisis deskriptif dengan menyajikan nilai rata-rata (x¯), simpangan baku (sb) dan koefisien keragaman (KK) serta uji-T dengan setiap persilangan sebanyak 10 ulangan. Variabel karkas yang diamati adalah bobot potong, karkas, dada, paha atas, paha bawah, sayap, punggung, dan variabel non karkas yaitu kepala, kaki, usus, hati, jantung, serta ampedal. Ayam hasil persilangan ayam IPB-D2 dengan ayam IPB-D3 dan resiprokalnya tidak memberikan perbedaan nyata pada bobot potong, persentase karkas, dan persentase non karkas. Perbedaan nyata hanya pada komponen dada yang disebabkan terdeposisinya daging pada bagian dada. Simpulan bahwa ayam hasil persilangan ayam IPB-D2 dengan ayam IPB-D3 memiliki persentase potongan dada yang lebih tinggi dibanding resiprokalnya. The genetic quality of local chickens has improved by developing IPB-D1 chickens as a new line of superior local chickens. The IPB-D2 chicken is the offspring of IPB-D1 chicken selected based on high antibody titer of body resistance. Meanwhile, the IPB-D3 chicken is the offspring of IPB-D1 chicken chosen based on the production of fast meat growth. This research contains information on measuring the percentage of carcass, non-carcass, and commercial cuts of chickens from the cross of IPB-D2 chickens with IPB-D3 chickens and their reciprocals at 12 weeks of age. The research objective was to see the response of carcass production between crossbreeds. The data were analyzed descriptively by presenting the mean value (x¯), standard deviation (sd) coefficient of variation (cv), and t-test with each cross including ten replicates. The carcass variables observed weight carcass, breast, thigh, drumstick, wing, dorsal, and non-carcass variables were head, leg, intestine, liver, heart, and gizzard. The crossing of IPB-D2 chicken with IPB-D3 chicken and its reciprocal did not significantly differ in weight, carcass percentage, and non-carcass percentage. There was only a significant difference in the breast component due to the deposition of the meat on the breast.
Keyword: ayam IPB-D2, ayam IPB-D3, persentase karkas, potongan komersial

Judul: Analysis of Carcass Weight and Commercial Cuts Percentage of IPB-D1 Chickens Reared on a Free-Range System.
Abstrak: Ayam IPB-D1 merupakan rumpun baru lokal komposit yang memiliki keunggulan lebih dari tetuanya. Pemeliharaan ayam ini dilakukan dengan sistem free-range untuk mengurangi tingkat stres. Penelitian ini bertujuan menganalisis persentase bobot karkas dan potongan komersial ayam IPB-D1 umur 12 minggu dengan pemeliharaan sistem free-range di UP3J Fakultas Peternakan IPB. Bahan yang digunakan terdiri dari masing-masing 15 ekor ayam IPB-D1 setiap jenisnya. Data pada penelitian ini dianalisis secara deskriptif untuk membandingkan persentase bobot karkas ayam jantan dan ayam betina. Ayam IPB-D1 jantan dan betina memiliki bobot potong sebesar 901,33 g dan 639,13 g. Persentase bobot karkas ayam IPB-D1 jantan dan betina berturut-turut sebesar 59,82% dan 57,42%. Persentanse bobot karkas ini tidak menunjukkan perbedaan yang nyata antara jantan dan betina, namun terdapat perbedaan yang nyata pada persentase bobot potongan komersial bagian paha atas, paha bawah, dan bagian ceker. Ayam IPB-D1 jantan memiliki persentase bobot potongan komersial lebih tinggi daripada ayam IPB-D1 betina free-range., IPB-D1 chicken is a new local composite breed that has superiority compared to its predecessor. The chickens were reared with a free-range system to lower the stress level. The aim of this study is to analyze the carcass weight and commercial cuts percentage of 12-week-old IPB-D1 chickens which was reared on a free-range system UP3J Faculty of Animal Science, IPB University. The materials that were used were 15 IPB-D1 chickens for each sex. Data was analyzed descriptively to compare the carcass weight percentage of female and male chickens. Male and female IPB-D1 chickens had slaughter weight of 901,33 g and 638,12 g respectively. The carcass weight percentages of male and female IPB-D1 chickens carcasses were 59,82% and 57,42% respectively. The carcass weight percentage of 12-week-old IPB-D1 chickens reared on a free-range system didn’t show significant difference between males and females. But, there were significant differences on the commercial cuts namely, thigh, drumstick, and feet. Male IPB-D1 chickens had a higher commercial cut weight percentage than the females in free-range.
Keyword: Carcass weight, Commercial cut percentage, Free-range, IPB-D1 chicken

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