Judul: Kajian populasi dan habitat Rafflesia patma Blume di cagar alam Pananjung Pangandaran Jawa Barat
Abstrak: RafJlesia patma Blume is placed as one of the CRB2c endagered status. it refers to the taxon who face the highest extinction in the short period of time. The flower scarce is caused by a live factor of R. patma that need specific habitants such as physical and biotic factors. The habitats and population of R. patma will be change on fluctuation due to the higher men activities and nature's changes. On the other hand, as an endagered species, we need to focus on population watching and do the research in CA Pananjung Pangandaran (CAPP) in order to avoid from the extinction. The research was held in CAPP on July - September 2008. Using purposive sampling method to get the data with a round plotting. Inside the plot was held a population measurement of R. patma and also valuing the physical and biotical components with quantitive descriptive and also qualitative descriptive. Lastly, valuing INP (the important of value index) and diversity for the vegetation level. From the assesment research founded the anlount of individual population is 3 12 spreading in 6 locations. The vegetation in R. patma habitants is classified into the lowlm~d rain forest vegetation with the normal standing structure. The composition of vegetation level for the trees is 47 species the the highest INP came from Vitexpubescens Vahl(26.24%), 35 species on the stake level with INP (22.67%) from Euphorbia chasembila species and on seedling level is 32 species with the highest WP from Pterospermum javanicum (82.51%) species. There are 2 species of host of R.patma, Kibalera (Tetrastigma leucostaphylum) and Tali koja (Tetrastigma sp.). There are 2 flies species that help for Lucilia sp dan Sarcophaga sp. Porcupine, chipmunk, black ant, deer, and squirrel are predicted as a component for spreading seed of R. patma. the physical condition have a topography between 0-100 mdpl and flat slope, slope slightly until a little steep (4-35%). Soil condition is loam texture, the acidity level is quite acid until acid and the primary element have medium concentration until low concentration, on the other hand for the secondarv structure have low until high co~lcentrations. Including climate b type with avkrage temperature between 23;7 OC - 25 OC, and humidity between 8 1,7%-90%. The management activities for R. patnza are focus on security advance and protecting flowerkith its population and the habitants. From the result describes in 2008, the increasing of individual population in CAPP is happen. Located ill the type of lowland vegetation forest in 0-100 mdpl which have B-climate type, medium temperature, high humidity and also can grow on the flat until quite steep slope. There are 2 plants species host of R. patnza and animal species for spreading, net decomposition of R. patma. Beside management level, manager is more focus on land security and R. patma itself.
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Judul: Karakteristik Habitat Rafflesia (Rafflesia Patma Blume.) Di Cagar Alam Bojonglarang Jayanti, Cianjur, Jawa Barat
Abstrak: Cagar Alam (CA) Bojonglarang Jayanti merupakan salah satu habitat Rafflesia patma. Tujuan dari penelitian ini untuk mengidentifikasi karakteristik komponen habitat biotik dan abiotik R. patma di CA Bojonglarang Jayanti. Penelitian dilakukan pada bulan Maret-April menggunakan plot tunggal analisis habitat untuk mengambil data fisik dan biotik serta studi literatur untuk pengambilan data iklim. Tipe vegetasi pada habitat R. patma adalah hutan dataran rendah dan hutan pantai dengan spesies dominan Cyathocalis biovulatus. Fauna yang ditemukan sebanyak 19 spesies dari 15 famili. Jumlah individu yang ditemukan sebanyak 90 individu R. patma pada ketinggian 0-100 mdpl, kemiringan rata-rata 14.73%, jarak dari pesisir pantai 758 m, jarak dari sumber air 12 m, ketebalan serasah 1.7 cm, dan jenis tanah Podsolik dengan kandungan hara rendah dan pH asam. Tipe iklim pada habitat R. patma adalah tipe iklim C dengan curah hujan 1 988.5 mm per tahun. Ancaman terhadap populasi R. patma di CA Bojonglarang Jayanti adalah perambahan hutan serta kurangnya pengelolaan dan perlindungan habitat.
Keyword: abiotik, biotik, habitat, R patma

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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