Judul: Karakter anatomi daun dan morfologi Phalaenopsis dan kerabatnya di Indonesia
Abstrak: Kajian taksonomi Phalaenopsis dan kerabatnya di Indonesia dilakukan dengan pendekatan struktur anatomi daun dan morfologi. Karakter anatomi daun meliputi ukuran stomata, bentuk dan susunan sel epidermis, tebal helai daun dan jaringan mesofil. Ciri-ciri tadi dapat dijadikan bukti taksonomi untuk membedakan marga Paraphalaenopsis, Doritis dan Phalaenopsis, tetapi tidak untuk membedakan antara Kingidium clan jenis-jenis Phalaenopsis. Hasil analisis filogenetik yang menggunakan karakter anatomi daun pada 4 marga tersebut dengan Vanda sebagai outgroup menghasilkan kladogram dengan panjang 10 langkah clan berakhir dengan 3 marga yang berkerabat yaitu Doritis, Kingidium d Phalaenopsis. Pendekatan morfologi terhadap jenis-jenis Phalaenopsis Indonesia berhasil mendata 19 jenis Phalaenopsis dengan Kalimantan sebagai pusat persebarannya. Analisis filogenetik pada jenis Phalaenopsis berdasarkan karakter morfologi dengan P. laycockii sebagai outgroup menghasilkan kladogram dengan panjang 51 langkah dan dengan percabangan 3 kelompok utama.
Keyword: anatomi daun, epidermis dan stomata, morfologi, phalaenopsis

Judul: Karakterisasi Morfologi Anggrek Phalaenopsis Hibrid
Abstrak: Orchid is one of ornamental plants that have a high aesthetic value and Phalaenopsis hybrid is one type of orchid that was famous in Indonesia. Characterization of Phalaenopsis hybrid should be made to determine the similarity between hybrids and as a basic information on plant breeding activities. The purpose of this study was to study the morphological character and similarity of 5 gentype of Phalaenopsis hybrid i.e, four genotype white flowering hybrid, one genotype yellow flowering hybrids and Phalaenopsis amabilis ‘Cidaun’ ecotype. Based on the morphology of leaves and flowers, two of the four genotype white flowering hybrid have similarity coefficient 1.00, without observation on flower color. Every Phalaenopsis hybrid clustered together on the similarity coefficient 0.729, but one of three replications yellow flowering hybrids have similarity coefficient 0.47 with main differences in leaf shape and flowering types. Phalaenopsis amabilis ‘Cidaun’ ecotype have similarity coefficient 0.528 with main differences with Phalaenopsis hybrid in flowers shape and flowering types.
Keyword: Phalaenopsis hybrid, morphological character, leaves, flowers, Coefficient similarity

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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