Judul: Variation of BoLA DRB 3.2 Alleles in Madura Cattle
Abstrak: Variation of BoLA DRB 3.2 alleles was investigated in madura cattle by PCR-RFLP and was compared with variation of BoLA DRB 3.2 alleles in limousin and FH cattle. The result indicated that BoLA DRB 3.2 was highly polymorphic in madura cattle and also in limousin and FH cattle. Thirty four BoLA DRB 3.2 alleles were identified with frequencies ranging from 1.47 to 22.00%. Thirty of thirty four alleles were similar to those reported earlier. Four alleles were new and had not been reported previously, those were *dbd, *kea, *kba, and *iaa. Three alleles were shared between madura, limousin, and FH cattle (*11, *23, and *37). Eight alleles were shared between madura and limousin cattle (*06, *16, *17, *20, *28, *34, *36, and *40). Two alleles were shared between madura and FH cattle (*12 and *25). Eleven alleles were only found in madura cattle (*04, *08, *21, *26, *27, *39, *43, *44, *50, *53, and *dbd). BoLA DRB 3.2*39 was the most frequent allele in madura cattle (17.65%).
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Judul: Keragaman Gen Branched Chain Ketoacid Dehydrogenase E1-α Polypeptide (BCKDHA) Ekson 2 dan 3 pada Sapi Madura
Abstrak: Branched Chain α-Ketoacid Dehydrogenase (BCKD) enzyme complex have a role in metabolism of Branched Chain Amino Acid (BCAA). BCKDHA gene encoding the first subunit of these enzyme complex within mithochondrion. Mutation in BCKDHA gene caused deficiency of BCKD complex that caused Maple Syrup Urine Disease (MSUD). The aim of this research is to detect variability of BCKDHA gene in madura cattle using Polymerase Chain Reaction-Single Strand Conformation Polymorphism (PCR-SSCP) method. According to migration pattern of single strand in PAGE 9%, there was four types found in exon 2 and 3 BCKDHA gene in madura cattle, that is A, B, C and D. There was two types of gene found in cattle that its origin from Bangkalan, which is A and C, whereas type that found in Sampang was four, which is A, B, C and D. The highest frequency in two locations is type A, in Bangkalan (83%) and in Sampang (50%).
Keyword: BCKDHA, exon 2, exon 3, gene, madura cattle, SSCP, gene type.

Judul: Nanokristalin Pirit (FeS2) sebagai Material Semikonduktor Fotovoltaik.
Abstrak: Teknologi fotovoltaik adalah suatu proses yang dapat mengubah sinar matahari menjadi energi listrik dengan media semikonduktor. Penggunaan sel surya untuk fotovoltaik hanya dapat mengonversi radiasi matahari menjadi energi listrik kurang dari 20%. Efisiensi akan meningkat ketika material semikonduktor untuk fotovoltaik dibuat menjadi ukuran nano. Pirit merupakan salah satu material semikonduktor fotovoltaik yang memiliki energi pita celah (Eg) dalam kisaran 0.8–0.95 eV. Energi pita celah tersebut terbukti meningkat ketika disintesis dengan metode hidrotermal menggunakan beragam molar [S]:[Fe] pada suhu 200 °C dalam 24 jam. Nilai energi pita celah yang dihasilkan adalah 1.58–2.073 eV. Ukuran nanokristalin pirit yang dihasilkan berada pada kisaran 21.04–58.77 nm menurut data Particle Size Analyzer. Besarnya ukuran nanokristal pirit yang tumbuh kurang dari 50 nm merupakan poin penting untuk aplikasi fotovoltaik.
Keyword: Hidrotermal, fotovoltaik, nanokristal, pirit