Judul: Studi Populasi dan Habitat Lutung Jawa (Trachypithecus auratus sondaicus) di Cagar Alam Pananjung Pangandaran, Jawa Barat
Abstrak: Javan langur (Trachypithecus auratus sondaicus) is one of the endemic primate species in West Java and is listed as Vulnerable status of IUCN 2013. The purpose of this research was to study the population and habitat of javan langur at Pananjung Pangandaran Nature Reserve. Observation had been done in June-July 2013. Population density of javan langur was estimated using line transect sampling method. Population density of javan langur in Pangandaran Nature Reserve was divided based on location of observation: Karang Pandan, Tadah Angin, and Cikamal. Karang Pandan has the highest density with 8ndividulas/ha, followed by Cikamal with 4 individuals/ha, and Tadah Angin with 2 individuals/ha. The existence of javan langur in Pangandaran Nature Reserve was supported by its habitat, including the vegetation. There were some trees that become the feeding tree of javan langur, the most frequently eaten by javan langur were Ficus sumatrana and Vitex pubescens
Keyword: population, javan langur, habitat, density

Judul: Mapping the Habitat Suitability of the Javan Langur (Trachypithecus auratus Geoffroy, 1812) in the Mount Gede Pangrango National Park
Abstrak: Lutung jawa (Trachypithecus auratus) merupakan satwa endemik Indonesia yang dapat ditemukan di Taman Nasional Gunung Gede Pangrango (TNGGP) dan saat ini memiliki status konservasi rentan. Salah satu upaya konservasi untuk menjaga populasi satwa ini yaitu dengan studi kesesuaian habitat. Penelitian ini bertujuan untuk mengetahui komponen yang mempengaruhi sebaran lutung jawa dan kesesuaian habitatnya di TNGGP. Analisis yang digunakan pada variabel lingkungan yaitu analisis multikolinearitas dan pembangunan model kesesuaian habitat diolah dengan Maximum Entropy. Hasil menunjukkan bahwa komponen habitat dengan peluang kehadiran lutung jawa paling tinggi berada pada habitat yang dekat dengan primata lain dan lokasi wisata, berada pada hutan dengan kerapatan hutan tinggi, ketinggian kanopi 26 m, ketinggian tempat 700 mdpl, kelerengan agak curam (17%), memiliki jarak 110 m dari sungai, 4500 m dari perkebunan, 150 m dari semak belukar, serta 500 m dari pemukiman atau lahan terbangun. Hasil pemodelan di TNGGP menunjukkan terdapat kawasan seluas 589,54 ha sangat sesuai, 1.080,35 ha sesuai, 2.533,31 ha cukup sesuai dan 20.075,64 ha kurang sesuai., Javan langur (Trachypithecus auratus) is an endemic species in Indonesia that can be found in the Mount Gede Pangrango National Park (TNGGP) and currently classified as vulnerable. The way to maintain this species population is identify the suitability of its habitat. This research aims to identify the factors that affect distribution of javan langur and their habitat suitability in TNGGP. Environmetal variable was analyzed using multicollinearity analysis and habitat suitability model build using Maximum Entropy. The results show that the habitat components with the highest probability of javan langur presence are habitats that close to other primates and tourist sites, and near from forests with high forest density, an forest canopy height of 26 m, an elevation of 700 masl, moderate steep slope (17%), a distance of 110 m from rivers, 4.500 m from plantations, 150 m from shrubland, and 500 m from settlements and built-up land. The modeling results indicate there are areas of 589,54 ha that are highly suitable, 1.080,35 ha that are suitable, 2.533,31 ha that are moderately suitable, and 20.075,64 ha that are less suitable in TNGGP.
Keyword: habitat, habitat suitability, javan langur, modeling

Judul: Membran Komposit Kitosan-Zeolit untuk Aplikasi Direct Methanol Fuel Cell
Abstrak: Direct methanol fuel cell (DMFC) is a fuel cell that utilize methanol as the fuel source. The electrolyte membrane used in the DMFC system in this research was chitosan-zeolite composite membrane. The composite membrane was synthesized with chitosan-zeolite composition variation of 1:1, 1:2, 1:3, and 2:1. The membranes were analyzed by Fourier transform infrared spectrophotometer (FTIR) and scanning electron microscope, and for the specific gravity. Membrane performances were tested with methanol uptake, methanol permeability, conductivity, and potential difference in the DMFC system. The FTIR spectrum showed no formation of new functional groups inducating that the composite membrane was a result of physical mixing. Morphological analysis showed that the membrane was nonporous. Chitosan-zeolite 1:3 composite membrane had the highest specific gravity and methanol uptake, 1.4226 g/mL and 41.44%, respectively. The highest proton conductivity was showed by the 1:2 chitosanzeolite composite membrane, namely 7.2946× 10-7 S/cm. Based on this research results, chitosan-zeolite composite membrane can be applied in DMFC system.
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