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The Fourth International Conference on Applied Electrostatics

作者： T.G.Kang D.H.Lee K.Y.Ryu H.J.Kim C.S.Lee J.D.Moon National agricultural Mechanization Research Institute Suwon Gyeonggi-Do 441-100 Korea National agricultural Mechanization Research Institute Suwon Gyeonggi-Do 441-100 Korea National agricultural Mechanization Research Institute Suwon Gyeonggi-Do 441-100 Korea National agricultural Mechanization Research Institute Suwon Gyeonggi-Do 441-100 Korea National agricultural Mechanization Research Institute Suwon Gyeonggi-Do 441-100 Korea Dept. of Electrical Eng. Kyungpook National University Daegu 702-701 Korea

＜正＞Spraying is one of the most efficient methods for pesticide and insecticide control. Generally, Speed Sprayer （Air carrier sprayer） is used for spraying in Korea when Speed Sprayer is used but chemical deposition amount on crops is only 20% of total spraying amount. agricultural chemicals which fail to reach the crops not only cause environmental contamination but losses of agricultural chemicals by lower deposition efficiency. In this research, laboratory test was carried out to determine the optimum design conditions of electrostatic agricultural nozzles for orchard applications. Parameters studied were type of electrode, the diameter of nozzle, and tilt angle of metal leaf. The results showed that the coverage area ratios and number of droplets for electrostatic nozzle were increased proportionally with the charging voltage. However, it appeared those electrical potentials higher than 4.5kV caused electrical discharge between nozzle body and electrode. Electrostatic nozzles resulted in significantly higher coverage area ratios than that of conventional nozzles. The optimum nozzle diameter and charging voltage in pin type electrode were found to be 0.59 mm and 4.0 kV, respectively.

关键词： agricultural machine Speed Sprayer (Air carrier sprayer) Electrostatic agricultural chemicals

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Reduction of Aromatic Nitro Compounds under Solvent-free Condition Using Almnina-suppored Hydrazine/Fe2 (NO3)3· 9H2O

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有机化学 2003年第Z1期23卷 109-109页

作者： WANG Yu-Lu ZHANG Chang-Rui Department of Chemical and Environmental Science Henan Normal University Xinxiang 453002 Department of Chemical and Environmental Science Henan Normal University Xinxiang 453002

　　The application of microwave techniques for chemical synthesis has attracted considerable interest in recent years because of their enhanced selectivity, reduced reaction time, easier work-up procedure. Aromatic amines are widely used as intermediate for dyes, photographic materials, pharmaceutical and agricultural chemicals and as antioxidants. So, particularly intense interest has been directed toward the synthesis of these compounds. Reduction of aromatic nitro compounds is one of the important routes to prepare them. Generally, the processes have been carried out in solvent. [ 1 ～ 6] The drawback of these methods is long reaction time.……

关键词： reaction time aromatic nitro compounds agricultural chemicals chemical synthesis

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