Judul: Aplikasi 1-Methylcyclopropene untuk Meningkatkan Vase Life Bunga Potong Zingiber spectabile Griff. Silvana
Abstrak: The freshness of Zingiber spectabile Griff Silvana (bihip) as cut flowers must be maintained by the appropriate post-harvest treatment. One of the post-harvest technologies that is commonly used is the treatment of use chemicals 1-Methylcyclopropene (1-MCP). This study aims to extend the vase life of bihip flowers using 1-MCP, to gain optimum concentration of 1-MCP that can extend the vase life of bihip flowers, and to find the best application technique of 1-MCP for longest vase life of bihip flowers. This study used a completely randomized design (CRD) factorial with two factors. The first factor is the concentration of 1-MCP consists of five levels; 0 ppm (A0), 0.001 ppm (A1), 0.002 ppm (A2), 0.003 ppm (A3), and 0.004 ppm (A4). The second factor is application technique of 1-MCP consists of two levels : sprayed (B1) and soaked (B2). The results showed that 1-MCP can significantly extend the vase life of cut flowers bihip up to 11.30 day compared to control which is only 9.55 day. Concentration 0.004 ppm of 1-MCP was able to extend optimum vase life of cut flowers bihip until 11.30 day. Method 1-MCP application to efficiently extend until 11.10 day bihip flowers are soaking in a solution of 1-MCP. The combination treatment of 1-MCP to extend the vase life of flowers bihip that 1-MCP treatment concentration of 0.004 ppm by soaking treatment
Keyword: Silvana, Zingiber spectabile Griff, vase life, bihip, Aplikasi 1-Methylcyclopropene

Judul: Aplikasi 1-Methylcyclopropene untuk meningkatkan vase life bunga potong Tapeinochilos anannaceae K.Schum
Abstrak: Kualitas bunga Tapeinochilos anannaceae K. Schum (kasturi) sebagai bunga potong harus dipertahankan kesegarannya selama masa simpan, sehingga perlu diaplikasikan perlakuan pasca panen yang tepat. Salah satu perlakuan pasca panen yang dapat digunakan adalah pemberian 1-Methylcyclopropene (1-MCP). Posisi bunga selama penyimpanan diduga dapat mempengaruhi vase life bunga potong. Penelitian ini bertujuan untuk memperpanjang vase life bunga potong kasturi dengan menggunakan 1-MCP, mendapatkan konsentrasi 1-MCP optimum dan mencari posisi yang terbaik untuk memperpanjang vase life bunga potong kasturi. Penelitian ini menggunakan rancangan acak lengkap (RAL) faktorial yang terdiri dari dua faktor dan sepuluh ulangan, faktor pertama adalah konsentrasi 1- MCP yang terdiri dari lima taraf: 0 ppm (A0), 0.1 ppm (A1), 0.2 ppm (A2), 0.3 ppm (A3) dan 0.4 ppm (A4). Faktor kedua yaitu posisi penyimpanan secara vertikal dan horizontal. Hasil penelitian menunjukkan bahwa aplikasi 1-MCP pada bunga potong kasturi secara nyata dapat memperpanjang vase life bunga potong kasturi hingga 1.2-1.8 kali lipat dibandingkan tanpa perlakuan 1-MCP. Kombinasi perlakuan yang optimum untuk memperpanjang vase life bunga potong kasturi adalah 1-MCP dengan konsentrasi 0.3 ppm dan disimpan dengan posisi vertikal.
Keyword: Bogor Agricultural University, Institut Pertanian Bogor, IPB, 1-Methylcyclopropene, Kasturi, Storage position, Vase life

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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