Judul: Penyebaran Jenis Jirak (Symplocos Fasciculata Zoll.) di Resort Kawah Ratu Taman Nasional Gunung Halimun Salak, Jawa Barat
Abstrak: Jirak (Symplocos fasciculata Zoll.) adalah salah satu jenis asli di Taman Nasional Gunung Halimun Salak, terutama pada Resort Kawah Ratu. Tumbuhan ini dapat dimanfaatkan sebagai bahan pewarna alami, selain itu bagian tumbuhan seperti daun juga dapat dimakan dan dijadikan obat. Oleh karena manfaat yang dimiliki jirak, tumbuhan ini dirasa penting untuk dibudidayakan . Penelitian ini bertujuan menganalisis kerapatan dan pola persebaran jirak (Symplocos fasciculata Zoll.) di Resort Kawah Ratu Taman nasional Gunung Halimun Salak . Pengambilan data dilakukan di dua blok yang terdapat di Resort Kawah Ratu TNGHS , yaitu blok Leles dan blok Pamengpeuk dengan menggunakan metode petak tunggal . Hasil penelitian menunjukkan pola persebaran jirak pada kedua plok pengamatan adalah mengelompok., Jirak (Symplocos fasciculata Zoll) is one of the native species in the Gunung Halimun Salak National Park, especially in the Kawah Ratu resort. This plant can be used as a natural coloring agent, in addition to plant parts such as leaves can also be eaten and used as medicine. Because of the benefits of jirak, this plant is considered important to be cultivated. This study aims to analyze the density and distribution pattern of jirak (Symplocos fasciculata Zoll) at Kawah Ratu Resort, Gunung Halimun Salak National Park. Data collection was carried out in two blocks located at the Kawah Ratu Resort of Mount Halimun Salak National Park, namely the Leles block and the Pamengpeuk block using the single plot method. The results showed that jirak distribution pattern in the two observation blocks was grouped.
Keyword: Distribution, Jirak, Kawah Ratu Resort, Symplocos fasciculata Zoll, Gunung Halimun Salak National Park

Judul: Studi Populasi dan Distribusi Palahlar (Dipterocarpus hasseltii Blume) di Resort Gunung Salak I, Taman Nasional Gunung Halimun Salak
Abstrak: Taman Nasional Gunung Halimun Salak (TNGHS) merupakan kawasan konservasi yang berpotensi sebagai habitat dari berbagai jenis flora maupun fauna langka dan dilindungi. Palahlar (Dipterocarpus hasseltii Blume) menjadi salah satu jenis tumbuhan langka yang terdapat di kawasan TNGHS dengan status konservasi genting (endangered) dengan tren populasi yang menurun. Penelitian ini bertujuan menganalisis kondisi habitat, kondisi populasi, serta pola sebaran D. hasseltii di Resort Gunung Salak I, TNGHS. Pengambilan data dilakukan secara purposive sampling berdasarkan keberadaan jenis D. hasseltii. Analisis vegetasi menggunakan metode jalur berpetak sebanyak 5 jalur berukuran masing-masing 100 m × 20 m, sehingga total luas petak pengamatan seluas 1 ha. Kondisi umum lokasi didominasi oleh puspa (Schima wallichii) yang memiliki Indeks Nilai Penting (INP) tertinggi pada tingkat pertumbuhan semai, pancang, dan pohon masing-masing sebesar 26,80%, 24,04%, dan 53,86%. Laju regenerasi D. hasseltii berdasarkan tingkat pertumbuhannya menunjukkan kondisi yang tidak normal, karena jumlah semai lebih sedikit dibanding jumlah pancang. Sebanyak 28 individu D. hasseltii ditemukan di lokasi penelitian yang terdiri atas 4 individu semai, 15 individu pancang, 3 individu tiang, dan 6 individu pohon. Hasil penelitian menunjukkan pola sebaran D. hasseltii adalah mengelompok., Gunung Halimun Salak National Park (GHSNP) is a conservation area that potentially becomes a habitat for rare and protected flora and fauna. Palahlar (Dipterocarpus hasseltii Blume) is a rare plant species found in the GHSNP area with an endangered conservation status and declining population trend. This study aimed to analyze habitat conditions, population conditions, and distribution patterns of D. hasseltii at Gunung Salak I Resort of GHSNP. Data were collected by purposive sampling method based on the presence of D. hasseltii. Vegetation analysis used the grid-lined method of 5 lanes measuring 100 × 20 m, each so that the total area of the observation plots was 1 ha. The observation plots were dominated by puspa (Schima wallichii), which had the highest Importance Value Index (IVI) at the growth rate of seedlings (26,80%), saplings (24,04%), and trees (53,86%). The regeneration rate of D. hasseltii, based on its growth rate, showed an abnormal condition, because the number of seedlings was less than the number of saplings. A total of 28 individuals of D. hasseltii were found at the observation plots consisted of 4 individual seedlings, 15 individual saplings, 3 individual poles, and 6 individual trees. The results showed that the distribution pattern of D. hasseltii was clustered.
Keyword: conservation area, Dipterocarpaceae, distribution, endangered species

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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