Judul: Population Structure of Madura Cattle in Burneh Sub-District Bangkalan District
Abstrak: Sapi madura merupakan salah satu sapi lokal Indonesia yang memiliki keunggulan daya adaptasi yang baik terhadap lingkungannya. Penelitian ini bertujuan mengkaji populasi sapi madura di Kecamatan Burneh Kabupaten Bangkalan. Sampel yang digunakan dalam penelitian ini adalah sapi madura di Desa Arok, Desa Perreng dan Kelurahan Tunjung. Penelitian ini dilakukan dengan metode survei dengan purposive sampling. Variabel yang dihitung dalam penelitian yaitu jumlah sapi jantan (Nm), jumlah sapi betina (Nf), jumlah sapi jantan dan betina muda, jumlah pedet jantan dan betina, ukuran populasi aktual (Na), ukuran populasi efektif (Ne), dan laju inbreeding (ΔF). Hasil penelitian menunjukkan jumlah populasi sapi madura di Kecamatan Burneh sebanyak 272 ekor, dengan struktur populasi sapi madura jantan dewasa sebanyak 8 ekor (2,94%), betina dewasa sebanyak 208 ekor (76,47%), jantan muda sebanyak 3 ekor (1,10%), betina muda sebanyak 16 ekor (5,88%), anak jantan sebanyak 12 ekor (4,41%) dan anak betina sebanyak 25 ekor (9,19%). Ukuran populasi aktual (Na) sapi madura adalah 216 ekor. Ukuran populasi efektif (Ne) sapi madura adalah 30 ekor. Laju inbreeding sapi madura di Kecamatan Burneh adalah 1,67%., Madura cattle is one of the Indonesia’s local cattle that have been the advantage of good adaptability to their environment. This study aims to examine the population of madura cattle in Burneh sub-district, Bangkalan district. The samples used in the research were madura cattle in Arok village, Perreng village and Tunjung urban village. This research conducted was survey method with purposive sampling. The variables were calculated in the study, namely the number of bulls (Nm), number of cows (Nf), number of bulls and heifer, number of male and female calves, actual population size (Na), effective population size (Ne), and the rate of inbreeding (ΔF). The results showed that the total population of madura cattle in Burneh sub-district is 272 heads of cattle, with a population structure of 8 bulls (2,94%), 208 cow (76,47%), 3 bulls (1,10%), 16 heifer (5,88%), 12 male calves (4,41%) and 25 female calves (9,19%). The actual population (Na) of madura cattle is 216 heads of cattle. The effective population of madura cattle is 30 heads of cattle. Rate of inbreeding of madura cattle in Burneh sub-district is 1,67%.
Keyword: madura cattle, population structure, rate of inbreeding, population structure, rate of inbreeding, madura cattle

Judul: Physiological Adaptation of Local Female Cattle Based on Age Groups in Wadung Village Jenu District Tuban Regency
Abstrak: Daging sapi merupakan penyumbang utama daging ruminansia di Indonesia. Meskipun potensi pengembangan ternak sapi cukup besar, adaptasi sapi terhadap iklim tropis Indonesia menjadi tantangan. Penelitian ini mengidentifikasi kemampuan adaptasi fisiologis sapi betina lokal berdasarkan kelompok umur di Desa Wadung Kecamatan Jenu Kabupaten Tuban. Penelitian ini melibatkan tiga ekor sapi betina dalam setiap kelompok usia (pedet, dara, dan induk), parameter yang dianalisis mencakup kondisi lingkungan, respons fisiologis, dan adaptasi fisiologis. Data yang diperoleh dianalisis menggunakan One-way ANOVA. Hasil menunjukkan bahwa sapi induk memiliki kapasitas adaptasi yang lebih tinggi daripada sapi dara, sementara sapi dara menunjukkan adaptasi yang lebih baik daripada sapi pedet., Beef is the primary contributor to ruminant meat in Indonesia. Despite the considerable potential for cattle farming development, the adaptation of cattle to the tropical climate of Indonesia poses a challenge. This study identifies the physiological adaptation abilities of local female cattle based on age groups in Wadung Village, Jenu District, Tuban Regency. The research involves three female cattle in each age group (calf, heifer, and cow), with analyzed parameters including environmental conditions, physiological responses, and physiological adaptations. Data obtained were analyzed using One-way ANOVA. The results indicate that cows have a higher adaptation capacity than heifers, while heifers show better adaptation than calves.
Keyword: local cattle, physiological adaptation, physiological response

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