A tomographic visualization of electric discharge sound fields in atmospheric pressure plasma using laser diffraction

The phase modulation of transparent gas can be detected using Fraunhofer diffraction technique, which we call optical wave microphone (OWM). The OWM is suitable for the detection of sonic wave from audible sound to ultrasonic wave. Because this technique has no influence on sound field or electric field during the measurement, we have applied it to the sound detection for the electric discharges. There is almost no research paper that uses the discharge sound to examine the electrical discharge phenomenon. Two-dimensional visualization of the sound field using the OWM is also possible when the computerized tomography (CT) is combined. In this work, coplanar dielectric barrier discharge sin different gases of Ar, N2, He were characterized via the OWM as well as applied voltage and discharge current. This is the first report to investigate the influence of the type of the atmospheric gas on the two-dimensional sound field distribution for the coplanar dielectric barrier discharge using the OWM with CT

Two Forms of NAD-Dependent d-Mandelate Dehydrogenase in Enterococcus faecalis IAM 10071

Two forms of NAD-dependent d-mandelate dehydrogenase (d-ManDHs) were purified from Enterococcus faecalis IAM 10071. While these two enzymes consistently exhibited high activity toward large 2-ketoacid substrates that were branched at the C3 or C4 position, they gave distinctly different K(m) and V(max) values for these substrates and had distinct molecular weights by gel electrophoresis and gel filtration

MuPS Typing of Cutting Cultivars and Plus Tree Clones of Japanese Cedar (Cryptomeria japonica D. Don) in Kyushu Region

九州の各県の公的研究機関が保存している九州地域のスギ(Cryptomeria japonica D. Don) 在来品種75品種のMuPS分析を行い,DNA型(MuPS型)を決定した.また,林木育種センター九州育種場に集植されている九州産スギ精英樹589クローンについてもMuPS型を決定した.今回決定したMuPS型データベースを用いることにより,九州地域のほとんどの在来品種と精英樹クローンの鑑定が可能になった.By using MuPS analysis, DNA typing of 75 cutting cultivars of Japanese Cedar(Cryptomeria japonica D. Don) raised in Kyushu region was performed. Almost all of the plus tree clones (589 clones) selected in Kyushu region by the plus tree selective breeding program were also typed by MuPS. These DNA types (MuPS types) are useful as a database to identify the cutting cultivars and plus tree clones