JaLCDOI 10.18926/AMO/32174
フルテキストURL fulltext.pdf
著者 Mori, Tadashige| Matsuda, Akira| Akashi, Shinji| Ogata, Masana| Takeoka, Kiyoshi| Yoshinaka, Masaru|
抄録 <p>In the present study, the fumes generated from manual metal arc (MMA) and submerged metal arc (SMA) welding of low temperature service steel, and the chromium and nickel percentages in these fumes, were measured at various horizontal distances and vertical heights from the arc in order to obtain a three dimensional distribution. The MMA welding fume concentrations were significantly higher than the SMA welding fume concentrations. The highest fume concentration on the horizontal was shown in the fumes collected directly above the arc. The fume concentration vertically was highest at 50 cm height and reduced by half at 150 cm height. The fume concentration at 250 cm height was scarcely different from that at 150 cm height. The distribution of the chromium concentration vertically was analogous to the fume concentration, and a statistically significant difference in the chromium percentages was not found at the different heights. The nickel concentrations were not statistically significant within the welding processes, but the nickel percentages in the SMA welding fumes were statistically higher than in the MMA welding fumes. The highest nickel concentration on the horizontal was found in the fumes collected directly above the arc. The highest nickel concentration vertically showed in the fume samples collected at 50 cm height, but the greater the height the larger the nickel percentage in the fumes.</p>
キーワード chromium and nickel alloy manual are (MMA) welding submerged metal arc (SMA) welding three dimensional disribution welding fume
Amo Type Article
発行日 1991-08
出版物タイトル Acta Medica Okayama
45巻
4号
出版者 Okayama University Medical School
開始ページ 233
終了ページ 240
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
論文のバージョン publisher
査読 有り
PubMed ID 1962531
Web of Science KeyUT A1991GD78000005
JaLCDOI 10.18926/AMO/32162
フルテキストURL fulltext.pdf
著者 Mori, Tadashige| Matsuda, Akira| Akashi, Shinji| Ogata, Masana| Takeoka, Kiyoshi| Yoshinaka, Masaru|
抄録 <p>In the present study, the fumes generated from manual metal arc (MMA) and submerged metal arc (SMA) welding of low temperature service steel, and the chromium and nickel percentages in these fumes, were measured at various horizontal distances and vertical heights from the arc in order to obtain a three dimensional distribution. The MMA welding fume concentrations were significantly higher than the SMA welding fume concentrations. The highest fume concentration on the horizontal was shown in the fumes collected directly above the arc. The fume concentration vertically was highest at 50 cm height and reduced by half at 150 cm height. The fume concentration at 250 cm height was scarcely different from that at 150 cm height. The distribution of the chromium concentration vertically was analogous to the fume concentration, and a statistically significant difference in the chromium percentages was not found at the different heights. The nickel concentrations were not statistically significant within the welding processes, but the nickel percentages in the SMA welding fumes were statistically higher than in the MMA welding fumes. The highest nickel concentration on the horizontal was found in the fumes collected directly above the arc. The highest nickel concentration vertically showed in the fume samples collected at 50 cm height, but the greater the height the larger the nickel percentage in the fumes.</p>
キーワード chromium and nickel alloy manual are (MMA) welding submerged metal arc (SMA) welding three dimensional disribution welding fume
Amo Type Article
発行日 1991-08
出版物タイトル Acta Medica Okayama
45巻
4号
出版者 Okayama University Medical School
開始ページ 233
終了ページ 240
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
論文のバージョン publisher
査読 有り
PubMed ID 1962531
Web of Sience KeyUT A1991GD78000005
JaLCDOI 10.18926/AMO/31753
フルテキストURL fulltext.pdf
著者 Ogata, Masana| Fujii, Yasuhito| Meguro, Tadamichi| Kira, Shohei| Matsuda, Akira| Izushi, Fumio| Kimoto, Tetsuo| Takahara, Shigeo|
抄録 In an attempt to determine the level and heat stability of residual catalase in somatic cells of acatalasemic Japanese, skin fibroblasts from an acatalasemic subject were cultured, and the catalase activity of the cultured fibroblasts was compared with that of cultured normal fibroblasts. Catalase activity was determined using an oxygen electrode. The residual catalase activity in cultured acatalasemic fibroblasts was 10% of the normal. The heat stability at 55 degrees C of residual catalase in the acatalasemic fibroblasts was similar to that of normal fibroblasts.
キーワード tissue culture skin fibroblast actalasemia catalase
Amo Type Article
発行日 1987-10
出版物タイトル Acta Medica Okayama
41巻
5号
出版者 Okayama University Medical School
開始ページ 201
終了ページ 204
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
著作権者 Copyright© 1999 Okayama University Medical School
論文のバージョン publisher
査読 有り
PubMed ID 3687491
Web of Science KeyUT A1987K590100003
関連URL http://ousar.lib.okayama-u.ac.jp/metadata/5561