Judul: Pengaruh Aplikasi KMnO4 dengan Media Pembawa Tanah Liat terhadap Umur Simpan Pisang Mas (Musa sp. AA Group).
Abstrak: Banana includes of five main food commodity in Indonesia besides wheat, cassava, sweet potato and corn so that banana need special treatment in order to get good quality, this experiment examined effect of KMnO4 with clay media conveyor to storage time for Mas bananas (Musa sp. AA GROUP). Experiment including storage time, index of color scale, mass reduction, hardness, fruit ratio, edible part, Total Disolved Solid, titratable acidity and Vitamin C. Monitoring of mass reduction and index of color scale did 3, 6 and 9 days after experiment, while hardness, fruit ratio, edible part, Total Disolved Solid, titratable acidity and Vitamin C did 6 and 12 days after experiment. Result shown KMnO4 has not effect to storage time, vitamin C and total of solid dissolved but it affected to index of color scale, mass reduction, hardness, fruit ratio and edible part. This experiment should be continue in order to get better result.
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Judul: Study of Banana (Cv. Mas Kirana) Storage in Active Modified Atmosphere Packaging using Potassium Permanganate
Abstrak: Cv. Mas Kirana is one of popular banana variety commonly grown in Indonesia and the mainstay of banana industry for both domestic and export trades. Major constraints and problem associated with postharvest handling of fresh banana are short shelf life and lack of postharvest handling. There is a need to find appropriate storage method in order to extend the storage life to mantain the fruit quality for retail packaging for domestic market. Modified atmosphere packaging (MAP) is an ideal preservation technique and is known to have great potential to extending the postharvest life of banana with potassium permanganate (KMnO4) sachets as ethylene absorbent were used in MAP to absorb endogenously produced ethylene. The purpose of this study was to evaluated for fruit quality and shelf life under MAP packaging, with or without an (KMnO4). The data obtained from physico chemical analysis and sensory evaluation were analyzed statically for analysis of variance with Duncan test (p<0.05) was used to detect significant differences for the treatment means. The results indicate that the shelf life of fruits packed under White Stretch Film (WSF) with KMnO4 (active MAP) at 28 °C could be extended up to 10 days compared to 6 days for banana control packed under WSF without KMnO4 (passive MAP), and the shelf life of fruits packed under active MAP at 15 °C could be extended up to 24 days compared to 16 days for passive MAP. Active MAP treatments delayed weight loss, colour, texture, starch content, total soluble solids (TSS), ascorbic acid (Vitamin C) and pulp of water content as compared to control banana (passive MAP). Sensory quality (colour, texture, aroma, and taste) of fully ripe fruits of both WSF without KMnO4 and WSF with KMnO4 was very good.
Keyword: Active modified atmosfir packaging, potassium permanganate, ethylene absorbent, banana

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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