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.
Keyword: 

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: Separation of Neodymium from U3Si2/Al Fuel Plate for Burn-Up Determination
Abstrak: Neodymium is a common fission product produced in nuclear fission reactions. Neodymium in this study was chosen as a burn-up indicator for U3Si2/Al fuel element plates because the neodymium isotope is a stable fission product with a fairly high yield. Some procedures were carried out to separate neodymium, starting with the separation of cesium isotopes (137Cs, 134Cs) through the precipitation method, then separation of uranium isotopes (235U, 238U) and plutonium isotopes (239Pu, 238Pu) with Dowex 1x8 ion exchange resin, and separation of neodymium (Nd), samarium (Sm), as well as cerium (Ce) with Dowex 1x4 ion exchange resin. The Cs recovery reached 99.95%. The U and Pu isotopes resulting from the separation are subjected to an electrodeposition process and the weight of each isotope can be measured with an alpha spectrometer. The separation results of Nd from Sm and Ce have been proven using an XRF spectrometer. The neodymium isotopes separation was corrected using the standard addition method, and an average total Nd content of 2.4 ppm was obtained in the PEB U3Si2/Al bottom solution. It is hoped that this separation method can be applied in determining burn-up of nuclear fuel.
Keyword: neodymium, burn-up indicator, U3Si2/Al fuel plate