Judul: Evaluasi keragaan karakter dua lanras kacang bogor (Vigna subterranea (L.) Verdcourt) pada dua lingkungan tumbuh berbeda
Abstrak: Kacang bogor merupakan legume sumber karbohidrat yang dapat dikembangkan menjadi tanaman pangan baru. Penelitian ini bertujuan untuk mengevaluasi keragaan karakter dua lanras kacang bogor yang ditanam pada dua lingkungan tumbuh berbeda. Kedua lanras tersebut didapatkan dari petani yang ada di Sumedang dan Sukabumi. Penelitian dilaksanakan di Kebun Percobaan Leuwikopo Kampus IPB Darmaga dari bulan Juni hingga Oktober 2010. Setiap tanaman dijadikan satu satuan amatan. Setiap lanras ditanam pada dua lingkungan dengan dosis pemupukan berbeda, sehingga terbentuk empat populasi berbeda. Karakter yang diamati meliputi lebar kanopi, panjang tangkai, jumlah cabang, jumlal buku, panjang ruas, jumlah polong per tanaman, bobot polong basah per tanaman dan bobot polong kering per tanaman. Hasil uji nilai tengah menunjukkan bahwa lanras Sumedang di lingkungan marjinal memiliki potensi untuk dikembangkan berdasarkan karakter lebar kanopi, jumlah cabang, jumlah buku, bobot polong basah dan bobot polong kering. Pada lanras Sukabumi, tanaman pada lingkungan marjinal memiliki potensi untuk dikembangkan berdasarkan karakter jumlah polong dan tanaman pada lingkungan optimal memiliki potensi untuk dikembangkan berdasarkan karakter panjang tangkai daun dan panjang ruas. Hasil analisis korelasi antar karakter, menunjukkan bahwa karakter vegetatif yang konsisten berkorelasi positif dengan hasil adalah lebar kanop dan jumlah buku.
Keyword: Canopy width, Correlation, Marginal, Sukabumi, Sumedang

Judul: Evaluasi Keragaan Karakter Dua Lanras Kacang Bogor (Vigna subterranea (L.) Verdcourt) pada Dua Lingkungan Tumbuh Berbeda.
Abstrak: Bambara is legume carbohydrate source which can be developed into new crop. The objective of this experiment was to evaluate the characters of two landraces bambara groundnut in two different growing environments. The two landraces were obtained from farmers in Sumedang and Sukabumi. The experiments were conducted at Leuwikopo, IPB Darmaga, from June - October 2010. Each plant used as a unit of observation. Each landraces is planted on two environment with different fertilizer dosage, thus forming four different populations. The characters observed were width of canopy, stem length, number of branches, number of nodes, internode length, number of pods, weight of fresh pods/plant and weight of dry pods/plant. Result showed Sumedang landraces in the marginal environment has the potential to be developed based on width of canopy, number of branches, number of node, weight of fresh pods, and weight of dry pods. In Sukabumi landrace, crops in marginal environment has the potential to be developed based on number of pods and crops in optimal environment has the potential to be developed based on petiol length character and internodes length. Result of correlation analysis between the characters, the vegetative characters which consistent positively correlated with the crop yield are the width of canopy and number of nodes.
Keyword: canopy width, correlation, marginal, sukabumi, sumedang

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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