Judul: Sebaran Populasi dan Karakteristik Habitat Monyet Ekor Panjang Di Taman Nasional Gunung Merapi
Abstrak: Long-tailed macaque (Macaca fascicularis) is a widely distributed primate species which experiencing rapid population decline due to habitat loss and degradation, pharmaceutical usage and conflicts with human. Many researches regarding this species has been carried out, but not a particular topic on how volcanic eruptions affected its habitat. Gunung Merapi, a volcano located in Yogyakarta Province and was known as long-tailed macaque habitat, erupted in 2010 and made a massive destruction to the forest ecosystem. This research was aimed to identify the distribution of population, habitat characteristic and the correlation of habitat components to the existence of this monkey in Gunung Merapi forest ecosystem after the eruption took place. Spatial analysis was used to describe the distribution of population, while habitat characteristic was identified using vegetation analysis followed by chi square test. The result showed that 5 groups of this macaque were found spreading in 5 resorts of Gunung Merapi of which these regions were classified as slightly-damaged and moderately-damaged habitat. As for the diversity of plant species, an amount of 85 species was able to be identified and these species were found at the slightly-damaged and moderately-damaged habitats within a group of 82 and 29 species respectively. Of all these species only 21 and 11 species in each group were identified as the macaques’ diet. The result of Chi square test suggested a significant correlation between the existence of long-tailed macaque with habitat components of altitude, temperature, humidity, distance to farm, distance to water, plant species for diet, the number of vegetation species, and vegetation density (seedlings, saplings and trees).
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Judul: Studi Populasi dan Habitat Monyet Ekor Panjang (Macaca fascicularis) di Cagar Alam Pananjung Pangandaran Jawa Barat
Abstrak: Pananjung Pangandaran Nature Reserve is one of natural habitat for long-tailed macaque (Macaca fascicularis). This wildlife was listed as Least Concern status in IUCN (2013) and Appendix II in CITES. The result of the research, which was done in three observation tracks, showed a different density of long-tailed macaque. The greatest population density was found as Karang Pandan (22 ind/ha), while at second track (Tadah Angin) were 4 individuals/ha, and at the third track (Cikamal) there were 19 individuals/ha. The range of population at the first track as many as 22 ± 9 individuals, at the second track as many as 4 ± 2 individuals, and third track as many as 7 ± 4 individuals. The adult long-tailed macaque was found at most in this research. Sex ratio of long-tailed macaque at the first and third track was 1:4, and at the second track was 1:3. There were 48 plant species that were found in the area where the long-tailed macaque carried out their activity, and 22 of the species had potential for long-tailed macaque feed.
Keyword: population, Macaca fascicularis, habitat, density

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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