Judul: Standing and Habitat Condition of Sugar Palm (Arenga pinnata. (Wurmb.) Merr.) ‎in Hariang Village, Sobang District, Lebak Regency, Banten Province.
Abstrak: Pemanfaatan nira aren di desa hariang sudah dilakukan untuk waktu yang ‎cukup lama, oleh karena itu dilakukan penelitian untuk mengetahui seberapa besar ‎potensi nira aren yang dapat di manfaatkan. Penelitian ini bertujuan untuk ‎menduga potensi tegakan aren yang dapat di produksi niranya, mengidentifikasi ‎tingkat regenerasi serta pola persebaran, mengetahui tipologi habitat aren, serta ‎mengidentifikasi spesies vegetasi yang tumbuh di sekitar habitat aren. Penelitian ‎dilakukan pada kedua lereng yang menghadap kearah mata angin barat dan timur ‎dengan menggunakan metode observasi lapang, wawancara kepada beberapa ‎narasumber, analisis vegetasi dengan ukuran plot 20m x 20m, serta mencari ‎beberapa literatur yang sebagai acuan dan pendukung untuk hasil yang di dapat ‎dalam penelitian. Pada hasil penelitian di temukan persentase potensi tumbuhan ‎aren yang dapat di produksi sebesar 3% pada desa Hariang. Tingkat regenerasi ‎aren yang di dapat berada pada kategori bagus dengan pola persebaran yang ‎seragam. Sebanyak 48 jenis tumbuhan di temukan pada habitat aren. Vegetasi ‎hutan di sekitar desa hariang tergolong kedalam hutan rakyat dengan pola kebun ‎campuran. Hasil dari penelitian ini dapat dijadikan sebagai data tambahan dalam ‎upaya pengelolaan habitat aren.‎, Utilization of palm sap in Hariang village has been carried out for quite a ‎long time, therefore a study was conducted to find out how much potential palm ‎sap can be utilized. This study aims to estimate the potential of sugar palm stands ‎that can be produced for sap, identify the level of regeneration and distribution ‎patterns, determine the typology of sugar palm habitat, and identify vegetation ‎species that grow around the sugar palm habitat. The study was conducted on ‎both cliffs, each facing the west and east cardinal directions using field ‎observation methods, interviews with several sources, analysis of vegetation with ‎a plot size of 20m x 20m, and looking for some literature that can be used as a ‎reference and support for the results obtained. obtained in research. In the results ‎of the study, it was found that the percentage of potential sugar palm plants that ‎could be produced was 3% on Hariang village. The level of regeneration of sugar ‎palm that can be obtained is in the good category with a regular distribution ‎pattern. A total of 48 species of plants were found in the sugar palm habitat. The ‎forest vegetation around Hariang village is classified as community forest with ‎mixed garden pattern. The results of this study can be used as additional data ‎needed in efforts to manage sugar palm habitat.‎
Keyword: potential, sugar palm, typology

Judul: Stand Potential  Aren (Arenga pinnata Merr.) in Beruas and Teru Villages, Central Bangka Regency
Abstrak: Aren merupakan tumbuhan palma dari famili Arecaceae yang memiliki banyak manfaat dan bernilai ekonomi bagi masyarakat Desa Beruas dan Teru. Pemanfaatan aren bergantung pada aren yang tumbuh liar sehingga tingkat produksi aren rendah. Tujuan penelitian untuk menduga potensi tegakan dan produksi nira aren dan menyusun rencana pengembangan aren. Pengambilan data dilakukan dengan studi literatur, analisis vegetasi, pengamatan lapang, dan wawancara. Data dianalisis secara deskripsi kualitatif dan kuantitatif meliputi pendugaan tegakan aren, pola sebaran, kategori kelestarian, produksi nira aren, dan rencana pengembangan tegakan aren. Penelitian menemukan bahwa Desa Beruas memiliki 252 pohon aren dengan klasifikasi kelestarian fair, sementara Desa Teru memiliki 116 pohon dengan kelestarian good. Pola persebarannya cenderung mengelompok. Rata-rata produksi nira aren di Desa Beruas mencapai 11,38 liter per pohon per hari, sementara di Desa Teru belum ada tegakan yang menghasilkan nira aren. Pengembangan agroforestri dapat dilakukan di Desa Beruas, tetapi tidak memungkinkan di Desa Teru karena kondisi tempat tumbuhnya tidak sesuai., Aren is a palm plant from the Arecaceae family that has many benefits and economic value for the people of Beruas and Teru villages. Aren utilization depends on wild-growing aren palm so that the level of aren palm production is low. The aim of the study was to estimate the potential of aren palm stands, the production of aren palm sap, and to compose the development plan of aren palm. Data were collected through literature study, vegetation analysis, field observation, and interview. Data were analyzed qualitatively and quantitatively including estimation of palm stands, distribution patterns, sustainability categories, palm juice production, and development plans for palm stands. The study found that Beruas village has 252 aren palm trees with fair sustainability classification, while Teru village has 116 trees with good sustainability. The distribution pattern tends to be clustered. The average production of palm sap in Beruas village reached 11.38 liters per tree per day, while in Teru village there were no stands producing palm sap. Agroforestry development is possible in Beruas village, but not in Teru village due to the unsuitable growing conditions.
Keyword: aren, nira, pola sebaran, potensi

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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