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: Bakteri dan cacing parasitik pada insang dan saluran pencernaan ikan patin (Pangasius sp.)
Abstrak: The present study was conducted to isolte, culture and identificatify of bacteria and parasitic worm from gills and digestive tract of catfish. A group of 10 of catfish were used, each gills and digestive tract was collected. The parasitic worms were colored with Semichon’s Acetocarmine for permanent staining. Differentiations and characterizations of variants isolate were based on biochemical reactions and Gram staining technique. Parasitic worms that can be identified from gills were Dactylogyrus sp. and Pseudodactylogyrus sp. The laboratory result shows that the gills and digestive tract of catfish were predominantly contaminated with Aeromonas sp. and Staphylococcus epidermidis, followed by Streptococcus sp., Edwardsiella tarda, Escherichia coli, Basillus sp. dan Vibrio cholerae.
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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