Judul: Struktur Genetika Populasi Ikan Malalugis (Decapterus macarellus) di Perairan Sekitar Pulau Sulawesi Berdasarkan Mt-DNA Marker
Abstrak: Studies on genetic diversity of Malalugis (Decapterus macarellus) has been undertaken around Sulawesi to obtain population genetic structure of the study area. The study was based on RFLP analysis of mitochondrial genome DNA extracted from fish tissue (meat, fins). Fish samples collected from several populations of small-scale fisheries captured in several locations around Sulawesi. The results showed that the genetic diversity obtained by including low, ie between 0 to 0.3698. Provided two major groups in the population structure Malalugis fish in the waters around Sulawesi Island, namely: the first group is represented by a population of Makassar Strait,Bone Bay, Flores Sea, Banda Sea, Tolo Bay, Molucca Sea and Tomini Bay and the second group is represented by the Celebes Sea population. The population of the Bone Bay, Flores Sea, Banda Sea, Tolo Bay and Molucca Sea has a very close kinship, so that probably originated from the same stock. In the population there Tomini Bay locals, because there is little difference with adjacent populations (Maluku Sea and Banda Sea).
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Judul: Studi keragaman genetika populasi udang galah, Macrobrachiumm rosenbergii berdasarkan Polimorfisme Mitokondria DNA
Abstrak: Indonesia dikenal sebagai pusat keberadaan spesies asli udang galah karena masih terdapat 19 spesies asli Indonesia. Udang galah Macrobrachium rosenbergii merupakan salah satu jenis udang Palaemonid air tawar yang umum dibudidayakan di Indonesia. Di alam bebas udang galah sering ditangkap di sekitar sungai, danau, dan rawa - rawa. Di Indonesia udang galah banyak terdapat di wilayah Pulau Sumatra, Pulau Kalimantan, sedangkan di Pulau Jawa, Sulawesi, dan Papua hanya sedikit ditemukan. Keragaman populasi genetik sangat penting untuk menjaga populasi, yang akan memberikan respon paralel terhadap perubahan parameter-parameter lingkungan. Pengamatan variasi atau keragaman genetik dapat dilakukan dengan dua cara yaitu melalui keragaman ale! (allelic diversity) dan heterozigositas. Estimasi keragaman genetik dapat dilakukan dengan menggunakan penanda­penanda molekuler. Salah satu penanda molekuler yang umum digunakan dalam bidang manajemen dan budidaya perikanan adalah penanda DNA mitokondria (mtDNA). Sekuens mtDNA CO-I udang galah yang diperoleh dari hasil amplifikasi memiliki panjang susunan basa antara 700-1500 bp. Dari tujuh enzim restriksi yang digunakan untuk memotong sekuens tersebut (Hae III, Rsa I, Mbo I, Taq I, Alu I, Sac I, dan Hin6 I), hanya terdapat empat enzim yang memberikan situs pemotongan pada sekuens mtDNA CO-I. Lokasi pengambilan koleksi udang galah akan mempengaruhi tingkat variasi haplotype dari tipe restriksi sekuens mtDNA CO-I udang galah.
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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