Judul: Keanekaragaman Amfibi di Kabupaten Murung Raya, Kalimantan Tengah
Abstrak: Species diversity is one of variable that needed for conservation management. The research about amphibian diversity is still lack, especially on Kalimantan. The objective of this study is to identify amphibian diversity on aquatic and terrestrial habitats also level of amphibian diversity. The research conducted on 1st August until September 30rd 2011. The study shows that Leptolalax hamidi classified as Vulnereable base on IUCN Red List and 11 amphibian species are endemic on Kalimantan. Satai river have the highest number of diversity, about 2,47 and Luan river is the lowest, about 2,05. The diversity number in this study is better than another amphibian research in the diferent location on Kalimantan
Keyword: diversity, Central Kalimantan, amphibian

Judul: Keanekaragaman Amfibi pada Beberapa Tipe Habitat di Taman Nasional Kutai Kalimantan Timur
Abstrak: Keberadaan amfibi di Taman Nasional Kutai masih belum banyak diketahui karena minimnya penelitian amfibi di TN Kutai. Informasi mengenai amfibi penting bagi upayapengelolaan konservasi jenis. Penelitian ini bertujuan untuk mengidentifikasi komposisi jenis amfibi, mengukur nilai keanekaragaman amfibi pada beberapa tipe habitat dan mengidentifikasi faktor-faktor penentu kehadiran jenis amfibi di TN Kutai. Metode yang digunakan dalam penelitian ini yaitu Visual Encounter Survei (VES) yang dikombinasikan dengan panjang jalur transek. Penelitian ini dilakukan di empat tipe habitat yaitu hutan dataran rendah, hutan rawa, hutan mangrove dan hutan kerangas. Ditemukan 22 jenis amfibi (N= 146 individu) yang berasal dari 6 famili. Jenis yang paling banyak ditemukan yaitu Amnirana nicobariensis. Nilai keanekaragaman amfibi tertinggi adalah pada tipe habitat hutan dataran rendah (H’=2.63) dibandingkan dengan tipe habitat lain. Faktor dominan yang paling berperan dalam kehadiran jenis yaitu kelembaban relatif (jalur terestrial) dan keberadaan substrat batu (jalur akuatik).
Keyword: Amphibian, diversity, Kutai National Park

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