Judul: Genetic Differentiation and Labi-Labi  Distribution Amyda cartilaginea in Populations in Northern Kalimantan
Abstrak: Labi-labi is a freshwater turtle with a soft shell and is widespread in some Asian countries. Indonesia has a species of labi-labi that is spread naturally, one of which is Amyda cartilaginea. The research was conducted using mitochondrial d loop DNA as a genetic marker. The study aims to study the genetic variation and the phylogeographic relationship of A. cartilaginea in the Kalimantan population. Peripheral samples of carapace and liver labi-labi A. cartilaginea are collected in the laboratory as a source of DNA molecules. DNA amplification is performed using the primary pairs AF574 (forward) and AF575 (reverse). The sequencing results had a length of 377 bp and all samples were confirmed as species A. cartilaginea. The genetic variation of A. cartilaginea populations in Northern Kalimantan contains 27 polymorphic sites that form six haplotipes with a haplotype diversity of 0.8444 and a nucleotide variety of 0.02107. The resulting genetic distance ranges from 0.000–0.061 with the phylogeographic tree A. cartilaginea Northern Kalimantan forming a single cluster compared to the distance., Labi-labi merupakan kura-kura air tawar dengan cangkang yang lunak dan tersebar luas di beberapa negara Asia. Indonesia memiliki spesies labi labi yang tersebar secara alami, salah satunya Amyda cartilaginea. Penelitian dilakukan dengan memanfaatkan ruas d-loop DNA mitokondria sebagai penanda genetik. Penelitian ini bertujuan mempelajari variasi genetik serta hubungan filogeografi A. cartilaginea pada populasi Kalimantan. Sampel perifer karapas dan hati labi-labi A. cartilaginea koleksi laboratorium sebagai sumber molekul DNA. Amplifikasi DNA dilakukan menggunakan pasangan primer AF574 (forward) dan AF575 (reverse). Hasil sekuensing memiliki panjang 377 bp dan semua sampel terkonfirmasi sebagai spesies A. cartilaginea. Variasi genetik A. cartilaginea populasi Kalimantan Utara terdapat 27 situs polimorfik yang membentuk enam haplotipe dengan keragaman haplotipe sebesar 0,8444 dan keragaman nukleotida sebesar 0,02107. Jarak genetik yang dihasilkan berkisar 0,000–0,061 dengan pohon filogeografi A. cartilaginea Kalimantan Utara membentuk satu klaster yang dibandingkan dengan jarak.
Keyword: filogeografi, molekuler, mtDNA, PCR, phylogeography, molecular

Judul: Karakteristik Habitat Tangkap dan Parameter Demografi Populasi Panenan Labi-labi Amyda cartilaginea (Boddaert 1770) di Provinsi Kalimantan Tengah.
Abstrak: Amyda cartilaginea (Boddaert 1770) is one of harvested turtle species in Indonesia, mainly for consumption purpose in oriental countries. In order to prevent over-exploitation and the declining of the population, harvesting has been limited by quota. However, there is still too few supporting data, that can be used as a basis to determine the quota. The research was aimed to identify characteristics of catchment habitat, and also the demography and morphometric parameters of A. cartilaginea in Central Kalimantan Province. The result showed that harvested population of A. cartilaginea was dominated by adult females within the range weight of 3 – 5 kilograms of body mass. Two statistical tests were applied to describe the characteristic of catchment habitat of A. cartileginea in Central Kalimantan. Chi-square test on the types of land cover suggested that A. cartileginea catchment habitat had a specific condition. Index Neu showed that the catchment habitat were swamp and river (w=10,17; w=6,28 respectively). Binary logistic regression was used to construct a model which explained the dominant variables influencing the number of A. cartileginea at a certain point of habitat. There were four biophysical variables that significantly drove the number of catchment of A. cartileginea, and all were negatively correlated with number of catchment.
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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