Judul: Karakterisasi Morfologi dan Pertumbuhan Populasi Planlet Anggrek Phalaenopsis Hasil Persilangan Selama Tahap Aklimatisasi
Abstrak: This research was conducted at the Orchids House, KP. Leuwikopo, Bogor from December 2013 until May 2014. This research was conducted to study the morphological character and the effect of leaf fertilizer on growth of hybrid population of Phalaenopsis plantlets. This research consisted of 2 experiments, the first one was morphological characterization and the second was population growth of orchid plantlets. Morphological characterization was conducted according to Balithi guidance for Phalaenopsis characteristic (Balithi 2007). The morphological data was analysed by using NTSYSpc 2.02 version the results were be presented in dendogram. The population growth use a Completely Randomized Factorial Design consisting of two treatments, namely population and leaf fertilizers. The data was analyzed by variance analysis and further testing by DMRT (Duncan Multiple Range Test). The results of data analysis in morphological characterization showed that individuals in the each population has a high of similarity coefficient, which is in population P4 (76-100%), D015 (59- 100%), D022 (78-100%), TSW-1103 (63-100%), and A001 (80-100%). High level of similarity indicates that individuals in the population is relatively uniform for the characters observed. The second experiment showed that fertilizer treatment Supertonik 3 ml l-1 and a combination of fertilizer Supertonik 3 ml l-1 + 3 ppm chitosan increase the number of leaves in the population TSW-1111 (Phal. ‘Timothy Christopher’ x Phal. ‘Leopard Prince’) of 4.60 leaves at 12 weeks after treatment (WAT). Treatment of four types foliar fertilizer composition gives the same number of leaves in the population TSW-1107 (Phal. ‘Taipei Gold’ x Phal. venosa) and populasi TSW-1113 (Phal. Shin Spotted deer siblings cross).
Keyword: foliar fertilizer, growth of planlet, Bogor Agricultural University (IPB), similarity, morphological characterization, acclimatization

Judul: Pertumbuhan Beberapa Populasi Hibrida Phalaenopsis dan Pengaruh Bahan Organik terhadap Pertumbuhan PLBs Phalaenopsis amabilis (L.) Blume In Vitro
Abstrak: Anggrek Phalaenopsis merupakan salah satu genus anggrek yang sangat populer dalam famili Orchidaceae, karena bentuk bunga yang indah dan bunganya yang tahan lama. Perbanyakan anggrek Phalaenopsis umumnya dilakukan secara in vitro melalui multiplikasi Protocorm Like Bodies (PLBs). Penelitian ini bertujuan untuk membandingkan pertumbuhan beberapa populasi hibrida Phalaenopsis dan menganalisis pengaruh kombinasi bahan organik nabati dan emulsi ikan terhadap pertumbuhan Protocorm Like Bodies (PLBs) Phalaenopsis amabilis. Penelitian ini dilaksanakan di Laboratorium Kultur Jaringan Departemen Agronomi dan Hortikultura pada bulan Maret hingga Juli 2016. Penelitian ini terdiri atas dua percobaan yang keduanya disusun dalam rancangan acak lengkap (RAL). Percobaan 1 terdiri atas satu faktor yaitu genotipe hibrida Phalaenopsis dengan penggunaan media MS1/2 sebagai media dasar. Populasi yang digunakan antara lain populasi 1136 (Phal. ‘Jenco Arctic’ x Phal. bellina), 1137 (Phal. ‘Mab Eagle Calza’ x Phal. ‘Sogo Diamond’), 1138 (Phal. ‘Salu Spot’ x Phal. ‘Golden Sun – Ching Het Budha’), dan 1139 (Phal. ‘Leopard Prince’ x Phal Sunrise Star’). Percobaan 2 terdiri atas dua faktor. Faktor pertama adalah bahan organik terdiri dari ekstrak pisang, kentang, dan ubi jalar sebanyak 50 g L-1. Faktor kedua adalah bahan organik hewani berupa emulsi ikan dengan empat taraf konsentrasi yaitu 0 ml L-1, 2 ml L-1, 4 ml L-1, dan 6 ml L-1. Media dasar yang digunakan adalah 2 g L-1 pupuk daun Hyponex (NPK = 20:20:20). Hasil percobaan 1 menunjukkan populasi 1136 menghasilkan jumlah daun dan jumlah akar terbanyak dibandingkan dengan populasi lain yaitu sebanyak 3,6 daun planlet-1 dan 2,4 akar planlet-1. Hasil percobaan 2 menunjukkan bahwa perlakuan media terbaik untuk pertumbuhan PLBs adalah perlakuan media dengan penambahan 50 g L-1 kentang. Perlakuan media tersebut menunjukkan persentase hidup PLBs mencapai 100%; jumlah daun 3,2 planlet-1; dan jumlah akar 2,2 planlet-1. Penambahan media dengan 50 g L-1 kentang + 4 ml L-1 emulsi ikan menghasilkan persentase multiplikasi paling tinggi yaitu sebesar 77%.
Keyword: emulsi ikan, kentang, pisang, planlet, protocorm like bodies (plbs), ubi jalar

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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