Judul: Studi Bahan Oksidan Etilen dan Pengisi pada Penyimpanan Pisang Raja Bulu (Musa sp. AAB Group)
Abstrak: The objective of this research was to find out the effectivity of ethylene oxidant material and filler on storage of Raja Bulu banana. This research was conducted at Post Harvest Laboratory, Agronomy and Horticulture IPB, Darmaga, Bogor from March 2013 to May 2013. The experiment was arranged in completely randomized block design with single factor, consists of seven treatments and four replications. The shelf life was 11-19 days. Based on contrast orthogonal, treatment with oxidant ethylene material and HVS paper filler indicates 7-8 days longer than control and 4-6 days longer than treatment with oxydant ethylene material and newspaper filler.
Keyword: raja bulu banana, storage, filler, ethylene oxidant material

Judul: Penggunaan Kalium Permanganat sebagai Oksidan Etilen untuk Memperpanjang Daya Simpan Pisang Raja Bulu
Abstrak: Banana is a climacteric fruit which has an advance rate of respiration. The increasing of respiration rate in the ripening process is triggered by emission of ethylene in autocatalytic. The respiration rate of the banana can be inhibited by deactivated the ethylene using chemical treatments, such as KMnO4. The aim of this study are to study the inhibition of Raja Bulu banana respiration rate during storage using KMnO4 and have KMnO4 concentration to extend the shelf-life of Raja Bulu banana. This study was conducted during a month since from February until March 2013 at Postharvest Laboratory, Department of Agronomy and Horticulture, Faculty of Agriculture, Bogor Agricultural University. The experimental design was arranged in a randomized complete block design with 4 treatments and 5 replications, which were KMnO4 7.5%, 15%, 22.5%, and control (without KMnO4). Collected data was analyzed using F test method and if the treatments result showed a significantly affect was analyzed by Duncan Multiple Range Test (DMRT) test method. Parameters measured was the respiration rate, peel color index, shelf-life, weight reduction, edible part, rind firmness, total soluble solids, total titratable acids, and vitamin C. The results showed that the use KMnO4 of 7.5%, 15%, and 22.5% can inhibited the respiration rate of banana during storage so that suspend the peak of the climacteric Raja Bulu banana 1-2 days compared to control. The use KMnO4 of 7.5%, 15%, and 22.5% was not affect the quality of the physical and chemical of Raja Bulu banana
Keyword: ripening, respiration rate, postharvest, climacteric

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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