JaLCDOI 10.18926/AMO/32174
FullText URL fulltext.pdf
Author Mori, Tadashige| Matsuda, Akira| Akashi, Shinji| Ogata, Masana| Takeoka, Kiyoshi| Yoshinaka, Masaru|
Abstract <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>
Keywords chromium and nickel alloy manual are (MMA) welding submerged metal arc (SMA) welding three dimensional disribution welding fume
Amo Type Article
Published Date 1991-08
Publication Title Acta Medica Okayama
Volume volume45
Issue issue4
Publisher Okayama University Medical School
Start Page 233
End Page 240
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
File Version publisher
Refereed True
PubMed ID 1962531
Web of Science KeyUT A1991GD78000005
JaLCDOI 10.18926/AMO/32162
FullText URL fulltext.pdf
Author Mori, Tadashige| Matsuda, Akira| Akashi, Shinji| Ogata, Masana| Takeoka, Kiyoshi| Yoshinaka, Masaru|
Abstract <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>
Keywords chromium and nickel alloy manual are (MMA) welding submerged metal arc (SMA) welding three dimensional disribution welding fume
Amo Type Article
Published Date 1991-08
Publication Title Acta Medica Okayama
Volume volume45
Issue issue4
Publisher Okayama University Medical School
Start Page 233
End Page 240
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
File Version publisher
Refereed True
PubMed ID 1962531
Web of Science KeyUT A1991GD78000005
JaLCDOI 10.18926/AMO/31753
FullText URL fulltext.pdf
Author Ogata, Masana| Fujii, Yasuhito| Meguro, Tadamichi| Kira, Shohei| Matsuda, Akira| Izushi, Fumio| Kimoto, Tetsuo| Takahara, Shigeo|
Abstract 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.
Keywords tissue culture skin fibroblast actalasemia catalase
Amo Type Article
Published Date 1987-10
Publication Title Acta Medica Okayama
Volume volume41
Issue issue5
Publisher Okayama University Medical School
Start Page 201
End Page 204
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
Copyright Holders Copyright© 1999 Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 3687491
Web of Science KeyUT A1987K590100003
Related Url http://ousar.lib.okayama-u.ac.jp/metadata/5561