Judul: Aktivitas harian dan wilayah jelajah Lutung Jawa (Trachypithecus auratus Raffles 1821) di Resort Bama Taman Nasional Baluran
Abstrak: Baluran National Park particuralry Bama Resort is one of Javan Ebony leaf monkey (T.auratus Raffles 1821) habitat. This research purposes were to study daily behavior and homerange of Ebony leaf monkey group. The observation was conducted using Focal animal sampling method, the observation target is the activity of each Ebony leaf monkey group recorded continuously. Homerange was recorded by tracking and following the Ebony leaf monkey group while mapped using GPS (Global Positioning System). The average active time between two groups was around 12 hours 12 minutes, activity percentage from highest to lowest were 40% of feeding activity, 26% of moving activity, 22% of resting activity, and 12% of social activity. Average homerange from group I was 7,46 ha and group II is 13,15 ha. Main foods for Ebony leaf monkey were contains of Asam Jawa, Kesambi, Mimbo, Pilang, Kepuh, Walikukun, Akasia, and Jerukan
Keyword: Bogor Agricultural University (IPB), homerange, ebony leaf monkey, daily behavior

Judul: Pemodelan Spasial Kesesuaian Habitat Lutung Jawa (Trachypithecus auratus Geoffroy, 1812) di Resort Rowobendo Taman Nasional Alas Purwo
Abstrak: One of the Ebony leaf monkey habitat is Rowobendo Resort in Alas Purwo National Park. The research objectives are mapping habitat suitability, to identifying factors which highly influence habitat suitability and to determining area of Ebony leaf monkey habitat suitability. Ebony leaf monkey habitat suitability mapping was initiated by collection data, such as digital map, data survey and literature. This mapping was based on some habitat variables, namely NDVI, altitude, slope, distance from road, distance from river, and distance from village. The value from each points then being analyzed by using principal component analysis (PCA) to get the weight of each variable. Habitat suitability model of ebony leaf monkey was Y = (1.189*FkNDVI) + (2.546*Fkaltitude) + (1.058*Fkslope) + (1.058*Fkriver) + (2.546*Fkroad) + (2.546*Fkvillage). The habitat suitability map were reclassified into three suitability classes. The result showed that there were 953.60 ha of low habitat suitability, 1899.35 ha of medium habitat suitability, 859.43 ha of high habitat suitability. The habitat suitability map could be accepted by showing the validation about 87,10%.
Keyword: spatial modelling, habitat suitability, ebony leaf monkey

Judul: Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance
Abstrak: Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
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