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197 results on '"Hayashi, Terutake"'

190. Karyotype of Achalinus spinalis from Japan

Author

OTA, HIDETOSHI, primary, KAMEZAKI, NAOKI, additional, HIKIDA, TSUTOMU, additional, MATSUI, MASAFUMI, additional, MORI, AKIRA, additional, HAYASHI, TERUTAKE, additional, and TANABE, SHINGO, additional

Published
1991
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191. Biochemical Differentiation in Japanese Newts, Genus Cynops (Salamandridae)

Author

Hayashi, Terutake and Matsui, Masafumi

Abstract

Genetic variation was surveyed in 38 populations of Japanese newts of the genus Cynops using starch gel eletrophoresis. C. ensicauda from the Ryuku Archipelago was shown to be genetically well differentiated from C. pyrrhogaster from the Japanese main islands. Separation of these two forms at the species level is supported. C. ensicauda is genetically divided into two groups, each of which corresponds to previously recognized subspecies. On the contrary, protein variation patterns in C. pyrrhogaster are not consistent with the previously recognized subspecies or local races. From available geological information, the electrophoretic clock is calibrated at 1D = 13-22 MY in Japanese Cynops.

Published
1988

196. Profile measurement using standing wave trapping

Author

Washitani, Taisuke, Michihata, Masaki, Hayashi, Terutake, and Takaya, Yasuhiro

Abstract

Various products have been miniaturized in recent years. And, the measurement technology for surface profile of micro components is highly demanded. Then, we proposed a new measurement technique for surface profile using the standing wave trapping. The high-accuracy scale and the high-sensitive sensor are required in the profile measurement. In our measurement system, the optical trapping particle is used as the sensor. The standing wave pattern is used as the measurement scale, which has wavelength-determined intensity pitch of interference field (/2). Therefore, this measurement technique is expected to perform the high-accuracy measurement. It was experimentally found that the vertical measurement range is about 250 m. The uncertainty of the sensor is ±/100. Thus, this technique is capable of measuring large objects in height. When measuring the continuous surface, the sensor particle is scanned in the horizontal direction above the measured surface. The trapped sensor particle in the standing wave field axially moves to follow the measured surface topography. The particle jumps when the surface profile exceeds the pitch of the standing wave pattern. Therefore, the surface profile can be calculated based on the measurement of the particle motional variation. As pre-measurement, the dependency of the scale pitch on measured surface angles was investigated. A microlens was measured with the angle dependency correction. This shows the improvement of the measurement accuracy.

Published
2011
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