Judul: The Growth Rate of Sixth-Generation Merawangarab Chicken Cross Breeding at The Age of 1 to 12 Week
Abstrak: Ayam merawangarab sebagai ayam silangan dari dua rumpun ayam lokal merawang dan arab merupakan upaya pengembangan kualitas ayam kampung di bidang genetika. Penelitian ini bertujuan untuk menganalisis laju pertumbuhan hasil persilangan antara ayam merawangarab generasi enam dengan perbedaan komposisi genetik merawang (M) dan arab (A) pada umur 1 sampai 12 minggu. Penelitian ini menggunakan hasil persilangan ayam arab dengan ayam merawang dengan rasio genetik yang berbeda yaitu M (merawang) 25%, 50% 62,5% dan 75% pada umur 1 sampai 12 minggu. Peubah meliputi konsumsi pakan, bobot badan, pertambahan bobot badan, konversi pakan, dan mortalitas. Hasil penelitian menunjukkan komposisi genetik yang berbeda pada ayam merawangarab generasi enam tidak berpengaruh terhadap pertumbuhan ayam. Pertumbuhan ayam merawangarab generasi enam dengan komposisi genetik merawang 25%, 50%, 62,5%, dan 75% sama.
Keyword: ayam merawangarab, laju pertumbuhan, persilangan

Judul: Body Size of The Sixth Generation Merawangarab Chicken Interse Mating at The Age of 2 Weeks to 12 Weeks
Abstrak: Ayam merawangarab sebagai ayam silangan dari dua rumpun ayam lokal merawang dan arab merupakan upaya pengembangan kualitas ayam kampung di bidang genetika. Penelitian ini bertujuan mengkaji pengaruh komposisi genetik yang berbeda yaitu merawang 25%, 50%, 62,5%, dan 75% terhadap ukuran tubuh ayam merawangarab generasi enam. Penelitian berupa pengukuran terhadap peubah berupa panjang shank, lingkar shank, panjang femur, panjang tibia, lingkar dada, panjang dada, dalam dada, lebar dada, panjang punggung, panjang sayap, dan bobot badan dari ayam berumur 2 minggu sampai 12 minggu. Hasil penelitian menunjukkan ukuran tubuh ayam merawangarab dengan komposisi genetik yang berbeda mengalami pertambahan ukuran seiring pertambahan umur. Komposisi genetik yang berbeda pada ayam merawangarab generasi enam tidak berpengaruh terhadap ukuran tubuh ayam. Ukuran tubuh pada ayam dengan komposisi genetik merawang 25%, merawang 50%, merawang 62,5%, dan merawang 75% sama dan mendekati seragam., Merawangarab chicken is a crossed breed chicken from two local breeds, merawang, and arab chicken families that had been an effort to develop the quality of native chickens in genetics. This study examines the effect of different genetic compositions, namely merawang 25%, 50%, 62.5%, and 75% on the body size of sixth-generation merawangarab chickens. The study was in the form of body parts measurements of merawangarab chickens including shank length, shank circumference, femur length, tibia length, chest circumference, chest-length, chest depth, chest width, back length, wing length, and body weight during the age of 2 weeks to 12 weeks. The results showed that the body size of merawangarab chickens with different genetic compositions increased in size with age. The different genetic compositions of the sixth generation of merawangarab chickens had no effect on the body size of the chickens. The diversity of body size in chickens with the genetic composition of merawang 25%, merawang 50%, merawang 62.5%, and merawang 75% were same and close to uniform.
Keyword: arab chicken, body size, merawang chicken, merawangarab chicken

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