Judul: The relationship among three populations of climbing perch fish (Anabas testudineus) based on analysis of Random Amplified Polymorphic DNA (RAPD) and morphometric characters.
Abstrak: Penelitian ini bertujuan untuk mengevaluasi hubungan 3 populasi ikan betok (Anabas testudineus) yang berasal dari Jawa, Sumatera, dan Kalimantan dengan metode RAPD (Random Amplified Polymorphic DNA) dan karakter morfometrik. Hasil penelitian menunjukkan bahwa tingkat heterozigositas populasi ikan betok berkisar antara 0,088-0,109, sedangkan polimorfisme genetik populasi ikan betok Kalimantan merupakan yang tertinggi (25,93%) dibandingkan dengan populasi dari Sumatera (22,22%) dan Jawa (18,52%). Hubungan kekerabatan ketiga populasi menunjukkan jarak genetik antara populasi ikan betok Jawa dan Sumatera (0,279) lebih dekat dibandingkan dengan Kalimantan terhadap Jawa (0,398) dan Sumatera (0,551). Berdasarkan analisis dendrogram UPGMA mengelompokkan populasi Jawa dan Sumatera terpisah dari populasi Kalimantan. Dalam hal ini, 3 karakter morfometrik menunjukkan perbedaan populasi dan 18 karakter kemiripan, serta terdapat indeks kemiripan antara Sumatera dan Jawa sebesar 10%
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Judul: Karakterisik Fenotip Morfometrik dan Genotip RAPD (Random Amplified Polymorphic DNA) Ikan Betok Anabas testudineus (Bloch, 1792)
Abstrak: The identification of phenotype and genotype is needed for mapping the population structure geographically of a fish species in the waters territory. The purpose of this research was to analyze the genetic variability based on the morphometric phenotype characteristics and RAPD genotypes of climbing perch fish population of Kalimantan, Java and Sumatera. Characterization of phenotypes were conducted using a method of morphometric truss and typing of genotype by using three primers of RAPD (OPA-07, OPA-02, and OPC 05). The polymorphism level and heterozygosity of climbing perch fish population of Kalimantan was higher than the population of Java and Sumatera, wich reached 39,29% and 0,16. The genetic distance between climbing perch fish population of Kalimantan, Java and Sumatera ranged from 0,17 to 0,39. The population of Kalimantan showed the similarity of morphometric truss with Sumatera population about 49,97%, while with the population of Java was 24,96%.
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Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4