Judul: Keragaman kucing (Felis domesticus) di Kecamatan Bogor Tengah  berdasarkan karakter morfologi
Abstrak: Karakter morfologi memberikan ciri khusus pada setiap kucing dan dapat menggambarkan karakter dari suatu populasi. Penelitian ini mempelajari mengenai 11 lokus yang mengekspresikan karakter morfologi, yaitu lokus w~W, o~O, A~a, B~b, C~cs~ca~c, Ta~T~tb, i~I, D~d, s~S, L~l, dan m~M. Karakter tersebut diamati melalui video dan frekuensi alel dianalisis menggunakan metode square-root. Keragaman kucing di Kecamatan Bogor Tengah dilihat dari nilai heterozigositas (h) dan heterozigositas rataan (Ĥ). Dari 11 kelurahan administratif di Kecamatan Bogor Tengah diperoleh 514 individu kucing. Pola warna Siam yang jarang ditemukan di Indonesia, terdapat pada Kelurahan Tegalega dan Gudang. Ekor pendek di Kecamatan Bogor Tengah memiliki nilai frekuensi yang tinggi seperti halnya pada kucing-kucing di Asia. Nilai heterozigositas (h) pada lokus w~W sebesar 0.7%, lokus o~O sebesar 43.2%, lokus A~a sebesar 49.9%, lokus B~b sebesar 31.7%, lokus C~cs~ca~c sebesar 9.7%, lokus Ta~T~tb sebesar 39.4%, lokus i~I sebesar 1.8%, lokus D~d sebesar 27.7%, lokus s~S sebesar 49.2%, lokus L~l sebesar 11.2%, dan lokus m~M sebesar 45.3%. Nilai heterozigositas rataan (Ĥ) di Kecamatan Bogor Tengah relatif tinggi, yaitu sebesar 28.2%. Hal ini disebabkan adanya karakter-karakter tipe mutan dari setiap kelurahan.
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Judul: Morfogenetik Kucing (Felis domesticus) di Tiga Kecamatan di Kabupaten Wonogiri
Abstrak: Felis domesticus was originated from domestication of Felis silvestris (European wild cat). Usually, cats were utilized as pets and mice controller by humans. This study aimed to estimate cat diversity in three districts in Wonogiri based on morphological characters expressed by 11 loci: A~a, B~b~bl, C~cb~cs~ca~c, D~d, i~I, L~l, m~M, o~O, s~S, Ta~T~tb, and w~W. Estimation of allele frequencies were performed using square root and maximum likelihood methods. Heterozygosity (h) and average heterozygosity (Ĥ) were applied to determine alleles diversity. FST was used to estimate genetic diversity among three districts; Wonogiri, Ngadirojo, and Selogiri. Among 11 observed loci, new alleles that found were b, cs, d, I, l, tb, W. Mostly wild type allele revealed higher frequency than mutan type allele, except m~M locus. Heterozygosity (h) on each loci were A~a= 0.491, B~b= 0.294, C~cs= 0.167, D~d= 0.227, i~I= 0.021, L~l= 0.238, m~M= 0.501, o~O= 0.470, s~S= 0.499, Ta~T~tb= 0.311, and w~W= 0.002. The highest allele diversity (h) was revealed in m~M locus. Average heterozygosity (Ĥ) over 11 loci and 9 loci were 0.261 and 0.268, respectively. The difference of average heterozygosity (Ĥ) was due to allele distribution and influenced by geography. FST of A~a, B~b, C~cs, i~I, L~l, Ta~T~tb, and m~M loci were smaller than 0.05 meaning that low genetic diversity detected upon loci. The negative FST in D~d, o~O, s~S, and w~W loci indicated that there were no difference on genetic diversity.
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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