Judul: Prevalensi Infeksi Bakteri Patogen pada Ikan Patin (Pangasius hypophthalmus) di Kawasan Minapolitan Kabupaten Banjar
Abstrak: Numbers of 160 samples of Pangasius hypophthalmus were taken from 16 groups of fish (Pokdakan) in Minapolitan Area of Banjar District. Fish samples were taken selectively (which showed clinical symptoms of disease) or taken randomly if the symptoms of disease did not show. Bacterial isolates were made from organ of fish samples, and then were identified by the morphology, physiology and biochemistry test. Measurement of water quality parameters were also conducted directly in the respective pools/sampling sites. Eight types of pathogenic bacterial were found in Minapolitan Area of Banjar District with prevalence of 50.00%. The pathogenic bacterial were Plesiomonas shigelloides (26.88%), Aeromonas caviae (8.13%), Flavobacterium columnare (5.00%), Citrobacter freundii (3.13%), Corynebacterium sp (2.50%), Micrococcus sp (1.88%), Aeromonas hydrophilla (1.88%) and Pasteurella multocida (1.88%). Prevalence of pathogenic bacterial in West Martapura Subdistrict (52.5%) was higher than Martapura Subdistrict (42.5%). There were significant correlation between water turbidity and prevalence of pathogenic bacterial.
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Judul: Aplikasi Mannanoligosakarida dan Bacillus NP5 terhadap Pertumbuhan dan Respons Imun Benih Ikan Patin (Pangasianodon hypophthalmus) yang Diinfeksi Aeromonas hydrophila
Abstrak: Salah satu permasalahan dalam budidaya ikan patin adalah tingkat kematian larva hingga benih yang cukup tinggi yakni mencapai 40-80% yang diakibatkan oleh serangan bakteri Aeromonas hydrophila. Salah satu alternatif preventif dan ramah lingkungan dibutuhkan untuk mengatasi masalah tersebut, misalnya menggunakan prebiotik, probiotik dan sinbiotik. Penelitian ini bertujuan untuk menguji pengaruh pemberian prebiotik mannanoligosakarida (MOS) dan probiotik Bacillus NP5 terhadap pertumbuhan dan respons imun benih ikan patin yang diinfeksi bakteri A. hydrophila. Penelitian terdiri atas empat perlakuan yakni kontrol (tanpa pemberian prebiotik dan probiotik), prebiotik MOS, probiotik NP5, dan kombinasi keduanya. Larva ikan patin dengan bobot rata-rata 1.09±0.05 mg dan panjang rata-rata 0.54±0.01 cm dipelihara dengan padat tebar 150 ekor/akuarium. Ikan diberi pakan Artemia sp. dan pakan buatan yang telah diperkaya dengan prebiotik MOS, probiotik NP5, dan kombinasi keduanya selama 28 hari kemudian diuji tantang dengan bakteri A. hydrophila. Parameter yang diamati selama penelitian meliputi tingkat kelangsungan hidup, laju pertumbuhan harian, pertumbuhan panjang mutlak, jumlah konsumsi pakan, total kelimpahan bakteri, koefisien keragaman, aktivitas fagositosis, dan respiratory burst. Hasil penelitian menunjukkan bahwa pemberian mannanoligosakarida dan Bacillus NP5 dapat meningkatkan kinerja pertumbuhan dan respons imun benih ikan patin yang diinfeksi bakteri A. hydrophila dengan hasil terbaik pada perlakuan kombinasi keduanya.
Keyword: Aeromonas hydrophila, Bacillus NP5, mannanoligosakarida (MOS), Pangasianodon hypophthalmus

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