Judul: Ukuran dan Bentuk Tubuh Kambing Perah Peranakan Etawah Di Peternakan Doa Anak Yatim Farm dan Cordero Farm
Abstrak: The study observed body size and shape variability of Etawah Grade dairy goat in Doa Anak Yatim Farm (DAYF) in Waru Tegal village, District Ciampea and Cordero Farm (CF) in Ciapus, Bogor. EG dairy goat consisted of 185 heads were divided into 97 heads in DAYF (45 males and 52 females) and 88 heads in CF (35 males and 53 females). Goat was not randomly selected (purposive sampling). Descriptive statistics indicated that body measurements of PE dairy goat in CF was higher and selected strict than in DAYF. T2-Hotelling showed highly significant (P<0.01) differences in linear measurements of body surface of EG dairy goat in DAYF and CF. Principal Component Analysis showed that the size discriminator of EG dairy goat in DAYF and in CF was similar, namely body length and chest circumference. Eigen vector of body length and chest circumference of EG dairy goat in DAYF were +0.528 and +0.550 respectively, and that of in CF were +0.476 dan +0.522 respectively. The possibility proportion of Ettawa and Local (Kacang) blood goats observed was the same. The range of PE goat size in DAYF obtained at 58.722 to 185.974 wider than those found in CF at 76.323 to 182.257. The shape discriminator of EG dairy goat in DAYF and CF was different. The shape discriminator of EG dairy goat in DAYF was 0.768, whereas that of body length in CF was 0.837. Clustered diagram showed that the body size will increase and its shape will change as the EG dairy goats from both farm are getting older.
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Judul: Variabel Pembeda Ukuran Tubuh Kambing Peranakan Etawah (PE) Betina di Tiga Peternakan Berbeda
Abstrak: The purpose of this research was to determine the differences among surface linear measurement body morphometric characteristics of BPTU KDIHPT Pelaihari, Cordero Farm, and Doa Anak Yatim Farm Etawah Grade goat females. Number of Etawah Grade goat females be observed were 90 heads (30 heads of each). Variables measured were shoulder height, hip height, body length, chest width, depth chest, hip width, rump length, chest circumference and cannon circumference. The data was analyzed with T2-Hotelling test, Fisher discriminan analysis, Wald-Anderson and D2-Mahalanobis minimum distance. Discriminator variables between BPTU KDI-HPT Pelaihari vs Cordero Farm Etawah Grade goat females were depth chest, rump length, chest circumference and cannon circumference, whereas those of BPTU KDI-HPT Pelaihari vs Doa Anak Yatim Farm Etawah Grade goat females were shoulder height, hip height, rump length and chest circumference, and those of Cordero Farm vs Doa Anak Yatim Farm Etawah Grade goats were shoulder height and hip height. Unsimilarity body morphometric distance between BPTU KDI-HPT Pelaihari vs Cordero Farm Etawah Grade goat females was 4.617, whereas that of BPTU KDI-HPT Pelaihari vs Doa Anak Yatim Farm Etawah Grade goat females was 5.952 and that of Cordero Farm vs Doa Anak Yatim Farm Etawah Grade goat females was 2.265. BPTU KDI-HPT Pelaihari Etawah Grade goat females was separated from Cordero Farm and Doa Anak Yatim Farm ones . Cordero Farm Etawah Grade goat females formed a category together with Doa Anak Yatim Farm ones conjecturable purpose milk production, whereas BPTU KDI-HPT Pelaihari formed category 2 as Etawah Grade goat females conjecturable purpose meat production.
Keyword: Bogor Agricultural University (IPB), Etawah Grade goat, discriminant analysis, body size discriminator

Judul: Sintesis Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) dengan Variasi Konsentrasi Sulfur pada Substrat Kaca ITO
Abstrak: Film tipis Cu2ZnSnS4 (CZTS) merupakan bahan alternatif semikonduktor sebagai lapisan penyerap cahaya pada sel surya. CZTS dapat menggantikan senyawa silikon yang biasa digunakan sebagai bahan penyusun semikonduktor komersial. Kelebihan CZTS sebagai lapisan penyerap cahaya ialah ketersediaan bahan yang berlimpah di alam dan nilai koefisien absorpsi yang tinggi. Film tipis CZTS dibuat dengan variasi konsentrasi larutan sulfur menggunakan metode sol- gel dan spin coating sederhana pada substrat kaca inidium timah oksida (ITO). Setelah itu, film dikeraskan pada suhu 550 °C, selama 60 menit dengan dialiri gas N2. Difraktogram sinar X menunjukkan bahwa film tipis CZTS yang terbentuk dari kedua sampel memiliki struktur kristal kasterit dengan persentase yang kecil dibandingkan literatur. Sampel dengan konsentrasi sulfur 6M memiliki jumlah persen kristal yang lebih tinggi, yaitu 13,257% dengan ketebalan film 3,726–4,732 µm, sedangkan sampel dengan konsentrasi 3M memiliki persentase 7,538%. Sampel film tipis CZTS dengan konsentrasi sulfur 6M memiliki energi celah pita sebesar 1,876 eV dan nilai koefisien absorpsi sebesar 29,49 × 104 cm-1 menunjukkan hasil terbaik dan sesuai dengan kriteria film tipis CZTS komersil.
Keyword: CZTS thin films, ITO glass, Semiconductors, Sol-gel, Spin coating