Mineo Imamura

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The color properties of aging wood samples from historical buildings have been compared with those of recent wood samples that were heat treated at temperatures ranging from 90 to 180°C. The results of kinetic analysis obtained by the time-temperature superposition method showed that the color change during natural aging was mainly due to a slow and mild(More)
The use of optoelectrostatic micromanipulation, i.e. electric force in combination with the optical pressure of a focused laser beam, for manipulating biological cells was studied experimentally. The optical pressure has two components, the optical confinement pressure and the optical drift pressure. Cells are confined in the focused laser beam by the(More)
AMS (Accelerator Mass Spectrometry) radiocarbon dates for eight potsherds from a single piece of pottery from a wetland archaeological site indicated that charred material from the inner pottery surfaces (5052 ± 12 BP; N = 5) is about 90 (14)C years older than that from the outer surfaces (4961 ± 22 BP; N = 7). We considered three possible causes of this(More)
This paper deals with the mechanical properties of naturally aged wood and thermally treated wood wood. Naturally aged wood samples delivered from Japanese historical buildings are precise dating with using both radioactive carbon dating 14 C and dendrochronology methods. And Hinoki (Chamaecyparis obtusa Endl.) specimens cut out from recently felled down(More)
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