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 spp. Spesies Asli Indonesia
Abstrak: Crossing artificial propagation is an attempt to produce a better hibrid, but it often fails because of incompatibity of the parent. This could be minimized by performing characterization to determine the relationship between parental crosses. The purpose of this research was to study the morphological characters of 14 accessions of the Phalaenopsis orchid species i.e, Ph. gigantea A, Ph. bellina, Ph. amabilis ‘Halong’, Ph. violacea, Ph. doritis, Ph. schilleriana, Ph. modesta, Ph. cornu-cervi, Ph. pantherina, Ph. tetraspis, Ph. pulchra, Ph. amabilis ‘Cidaun’, Ph. amabilis ‘Treanggalek’ and Ph. gigantea B. The results showed that each member of each accession in Phalaenopsis species have a very close genetic relationship that is 100%, except Ph. tetraspis 87% relation due to the different tip shape of the leaves, Ph. gigantea A with Ph. bellina (87%), Ph. amabilis with Ph. gigantea B (87%), Ph. violacea with Ph. pulchra (87%) and Ph. amabilis Halong with Ph. pantherina (87% ). Based on the flower classification, Ph. violacea and Ph. modesta (78%) has close genetic relationship. While the classification based on leaf and flower, showed that Ph. violacea and Ph. modesta had close genetic relationship of 70%
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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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