Judul: Keragaman morfologi dan DNA mitokondria kebah apis cerana (Fab.) (Hymenoptera: Apidae) di Jawa Barat
Abstrak: Apis cerana mempakan lebah lokal Asia yang berpotensi tinggi untuk dikembangkan karena persebaran lebah ini masih sangat luas di Indonesia dan merniliki ketahanm terhadap tungau Vamhoa. Potensi suatu organisme dalam berbagai hd dipengar& oleh keragaman organisme tersebut. Penelitian ini bertujuan untuk mempelajari keragaman populasi A. cerana di Jawa Barat berdasarkan morfologi dan genetik DNA mitokondria. Koloni A. cerana yang diteliti b e d dari enam lokmi di Jawa Bamt, tiga lokasi di dataran rendah (0- < 700 m dpl) dan tiga lokasi di dataran tinggi (700-1500 m dpl). Analisis morfologi dilakukan berdasarkan ukwan bagian-bagian tubuh lebah yaitu: probosis, tungkai belakang (femur, tiba, metatarsus), sayap depan dan beberapa tergit dan sternit abdomen lebah. DNA mt diperoleh dari bagian toraks lebah pekerja. Ehtmbi DNA mt mengihxti metode Tomura Sr. Aotsuka (1988) modifikasi Duryadi et al. (1998). Amplifikasi DNA mt menggunakan metode PCR-RAPD dengan tujuh belas penanda random primer.
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Judul: Geometric Morphometrics Wing Venation of Bali Honey Bees Apis cerana
Abstrak: Apis cerana merupakan lebah madu yang tersebar di Asia. Di Indonesia, A. cerana tersebar di Sumatra, Kalimantan, Jawa, Bali, Lombok, Flores, dan Sulawesi. Lebah madu termasuk dalam Ordo Hymenoptera, Famili Apidae, Genus Apis dengan ciri khas yaitu adanya sengat pada lebah betina. Lebah Apis cerana banyak dibudidayakan di Indonesia karena potensinya sebagai lebah penghasil madu dan dapat hidup di dataran tinggi maupun dataran rendah. Penelitian ini bertujuan untuk menganalisis variasi landmark venasi sayap A. cerana serta analisis kekerabatannya dari tiga desa di Bali. Sayap depan lebah pekerja A. cerana dianalisis menggunakan morfometrik geometris berdasarkan 19 landmark venasinya. Analisis morfometrika geometris berdasarkan pergerakan landmark grid deformasi venasi sayap A. cerana berhasil menunjukkan perbedaan intraspesies pada lebah yang berasal dari lokasi berbeda. Variasi landmark pada A. cerana yang berasal dari Pitra dan Tenganan memiliki pergerakan landmark yang menjauhi nilai rerata. Hasil ini berbeda dengan A. cerana asal Melaya yang memiliki pergerakan landmark mendekati nilai rerata. Landmark venasi sayap A. cerana asal Bali yang paling berkontribusi terhadap pergerakan landmark adalah 8, 10, dan 11. Nilai bending energy tertinggi terlihat pada A. cerana Tenganan., Apis cerana (honey bee) spread across Asia. In Indonesia, A. cerana spread around Sumatra, Kalimantan, Java, Bali, Lombok, Flores and Sulawesi. Honey bees belong to the Hymenoptera Order, Apidae Family, Apis Genus with distinctive feature, sting on the female bee. Apis cerana are widely cultivated in Indonesia because of their potential as honey-producing bees and ability to live in the highlands and lowlands. This study aims to analyze variations in the landmark venation of A. cerana wings and kinship analysis of the bee from three villages in Bali. The fore wings of worker bee A. cerana were analyzed using geometric morphometrics based on 19 landmarks. Geometric morphometric analysis based on the deformation grid landmark movement of the wing venation of A. cerana succeeded in showing intraspecies differences in bees from different locations. Landmark variations in A. cerana from Pitra and Tenganan have landmark displacement that move away from the mean value. This result is different from A. cerana from Malaya which has movement of landmarks close to the mean value. The wing venation landmarks of A. cerana from Bali that contribute the most to the movement of landmarks are 8, 10, and 11. The highest bending energy values were seen in A. cerana Tenganan.
Keyword: Apis cerana, Geometric, Morphometrics, Wing Venation

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