Judul: Morphometrics of Fifth Prospective Generation IPB D2 Chickens Aged 4 to 12 Weeks
Abstrak: Ayam IPB-D2 merupakan ayam lokal hasil seleksi ayam IPB-D1 yang ditujukan untuk memiliki keunggulan tahan penyakit, pertumbuhan cepat, dan mampu beradaptasi pada lingkungan tropis. Penelitian ini bertujuan mengkaji dan mengevaluasi ukuran tubuh ayam IPB-D2 generasi kelima umur 4 sampai 12 minggu. Peubah yang diukur mencakup panjang shank, lingkar shank, panjang femur, panjang tibia, panjang dada, lebar dada, dalam dada, lingkar dada, panjang punggung, panjang sayap. Data peubah diukur setiap 2 minggu dan dianalisis secara deskriptif dan uji-t. Hasil penelitian menunjukkan 3 dari 10 peubah meliputi lingkar shank, panjang dada, dan dalam dada memiliki ukuran yang lebih rendah dibandingkan ayam IPB-D2 G4. Koefisien keragaman ayam IPB-D2 G5 pada umur 12 minggu berkisar 4,56%-9,79%. Nilai koefisien tersebut menunjukkan populasi yang sudah mendekati seragam dari segi karakteristik ukuran sehingga ayam IPB-D2 G5 bisa diajukan sebagai calon galur., IPB-D2 chickens are local chickens resulting from IPB-D1 chicken selection, which are intended to be disease-resistant, fast-growing, and able to adapt to tropical environments. This study aims to study and evaluate the body size of fifth-generation IPB-D2 chickens aged 4 to 12 weeks. The variables measured include shank length, shank circumference, femur length, tibia length, chest-length, chest width, chest depth, chest circumference, back length, and wing length. Variable data was measured every 2 weeks and analyzed descriptively and analyzed by t-test. The results showed that 3 out of 10 variables including shank circumference, breast length, and chest depth were lower than IPB-D2 G4 chickens. The diversity coefficient of IPB-D2 G5 chickens at 12 weeks of age ranges from 4.56% to 9.79%. This coefficient value shows that the population is nearly uniform in terms of size characteristics, which means IPB-D2 G5 chickens can be proposed as a candidate strain.
Keyword: IPB-D2 chickens, selection, morphometrics, crossing

Judul: Morphometrics of Fourth Prospective Generation IPB-D3 Chickenss Aged 2 to 12 Weeks
Abstrak: Ayam lokal IPB-D3 merupakan ayam PSKB generasi ketiga hasil persilangan antara jantan (pelungx sentul) dan betina (kampungxras pedaging) dengan komposisi genetik masing-masing 25%. Persilangan ayam ini bertujuan untuk menghasilkan ayam lokal dengan kualitas bobot badan seperti ayam broiler. Penelitian dilaksanakan pada bulan November 2023 sampai Februari 2024 di Laboratorium Pemuliaan Ternak dan Genetika Fakultas Peternakan Institut Pertanian Bogor. Variabel yang diukur setiap 2 minggu sekali adalah panjang betis, lingkar betis, panjang badan tibia, panjang tulang paha, panjang dada, lebar dada, dada, lingkar dada, panjang punggung, panjang sayap, dan panjang leher. Pengukuran berat badan dilakukan setiap minggu. Data dianalisis deskriptif dan uji t. Hasil penelitian menunjukan ukuran tubuh ayam IPB-D3 G4 relatif lebih besar dibandingkan dengan ukuran tubuh ayam IPB-D3 G2. Pada umur 12 minggu hasil penelitian menunjukan hanya ukuran panjang dada dan lingkar shank yang memiliki ukuran lebih kecil dibandingkan penelitian sebelumnya. Berdasarkan 10 peubah yang diukur selama 12 minggu, morfometrik ayam IPB-D3 generasi ke-4 memiliki koefisien keragaman rendah. Ukuran tubuh lebar dada memiliki keragaman terendah dan keragaman lingkar shank tinggi. Ukuran tubuh ayam IPB-D3 antar generasi masih beragam., The local IPB-D3 chicken is a third generation PSKB chicken resulting from a cross between a male (pelungx sentul) and a female (kampungxras broiler) with a genetic composition of 25% each. This chicken crossing aims to produce local chickens with body weight qualities like broiler chickens. The research was carried out from November 2023 to February 2024 at the Animal Breeding and Genetics Laboratory, Faculty of Animal Husbandry, Bogor Agricultural Institute. Variables measured every 2 weeks were calf length, calf circumference, tibial body length, femur length, chest length, chest width, chest circumference, back length, wing length and neck length. Body weight measurements were carried out every week. Data were analyzed descriptively anad by t test. The research results showed that the body size of IPB-D3 G4 chickens was relatively larger than the body size of IPB-D3 G2 chickens. At 12 weeks of age, the results of the study showed that only the chest length and shank circumference were smaller than in previous studies. Of the 10 variables measured over 12 weeks, the morphometrics of the 4th generation IPB-D3 chickens had a low coefficient of variation. Body size, chest width, has the lowest diversity and the highest diversity in shank circumference. The body size of IPB-D3 chickens between generations still varies.
Keyword: crosses, fourth generation, IPB-D3 chicken, morphometrics

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