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%
Keyword: 

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: Pemanasan Sekunder Reaksi Fusi Plasma dengan Menggunakan Radio Frequency
Abstrak: Plasma merupakan bentuk ke-empat dari materi setelah padat, cair dan gas yang terbentuk dari proses ionisasi gas. Plasma dapat digunakan dalam reaksi fusi, yaitu reaksi penggabungan dua inti atom ringan menjadi inti atom yang lebih berat sambil melepaskan energi. Untuk mendapatkan energi dari reaksi fusi, inti yang akan direaksikan harus dipanaskan pada temperatur yang sangat ekstrem tingginya. Salah satu cara agar dapat mencapai kondisi ini adalah memberikan pemanasan tambahan atau pemanasan sekunder kepada plasma dalam reaksi fusi tersebut. Nilai daya serap rata-rata ion Deuterium yang sesuai dengan selang nilai daya dari data ITER adalah daya yang menggunakan frekuensi 50 MHz sampai dengan 60 MHz. Dengan menggunakan frekuensi 60 Hz diperoleh nilai daya rata-rata yang diserap sebesar 1,235.10-12 W.
Keyword: gelombang radio, pemanasan sekunder, plasma, reaksi fusi