Masahiko Baba

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Metallic niobium powder was produced for applications in electric capacitors via calciothermic reduction of niobium hydroxide in molten CaCl2. Sub-micrometer spherical metallic particles with coral-like morphologies reflected the particle size of the starting oxide powder. A fine powder was obtained from the mixtures of niobium hydroxide and CaO or Ca(OH)2,(More)
Oviposition habits and seasonal changes in wing length, head width, and number of ovarioles of Simulium kawamurae Matsumura were investigated in Kyushu Island, Japan. Gravid flies swarmed over turbulent water and laid eggs on rock surfaces in the splash zone. Large, irregular egg masses often resulted from the mass oviposition by many females within the(More)
Seven larval instars were detected for a natural population of Prosimulium kiotoense Shiraki in Kyushu, Japan, from the size frequency distribution of postgenal lengths. Growth in P. kiotoense larvae followed a geometric progression from first to sixth instars, but the size ratio between sixth and seventh instars was smaller than between other successive(More)
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