scholarly journals Selection criteria of oxygen carriers utilizable for autotrophic growth improvement of Alcaligenes eutrophus under lowered oxygen partial pressure.

1995 ◽  
Vol 28 (2) ◽  
pp. 218-220 ◽  
Author(s):  
Shinjiro Yamamoto ◽  
Hajime Kurihara ◽  
Takashi Furuya ◽  
Xin-Hui Xing ◽  
Hiroyuki Honda ◽  
...  
Keyword(s):  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Selection Criteria ◽  
Alcaligenes Eutrophus ◽  
Oxygen Carriers ◽  
Autotrophic Growth

Enhancement of autotrophic growth rate ofAlcaligenes eutrophus in a medium containing perfluorocarbon under low oxygen partial pressure

1992 ◽  
Vol 14 (8) ◽  
pp. 733-736 ◽  
Author(s):  
Shinjiro Yamamoto ◽  
Hiroyuki Honda ◽  
Naohiro Shiragami ◽  
Hajime Unno
Keyword(s):  
Growth Rate ◽  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Autotrophic Growth ◽  
Low Oxygen

scholarly journals Effect of Hot-Dip Galvanizing Process on Selective Oxidation and Galvanizability of Medium Manganese Steel for Automotive Application

Coatings ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1265
Author(s):  
Zhang Chen ◽  
Yanlin He ◽  
Weisen Zheng ◽  
Hua Wang ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Surface Oxidation ◽  
Steel Sample ◽  
Dew Point ◽  
Manganese Steel ◽  
Automotive Application ◽  
Stable Phase ◽  
Annealing Atmosphere ◽  
Medium Manganese Steel

A medium manganese steel with 7.5 wt.% Mn for automobile application was galvanized in a continuous Hot Dip Galvanizing (HDG) simulator under different galvanizing conditions. It was shown that the effects of dew point, annealing temperature and annealing atmosphere on the surface oxidation of steel could be comprehensively evaluated by the consideration of oxygen partial pressure P(O2). Although Mn2SiO4 was a thermodynamic stable phase when P(O2) varied from 10−28 to 10−21 atm, it was difficult to form Mn–Si–O composite oxide because there was no enrichment of silicon on the steel surface. So, this oxide was generally formed in the Fe substrate and had little effect on the galvanizability. With the increase in P(O2) above 10−25 atm, MnO particles in the form of the thermodynamic stable phase became coarser and tended to aggregate, which hindered the formation of a continuous inhibition layer, resulting in the defects of bare spots on the galvanized surface of the steel. When the oxygen partial pressure greater than 10−22 atm, film-like MnO layer was formed on the surface of steel sample, which obviously deteriorated the galvanizability. The galvanizability of the steel can be improved by the regulation of oxygen partial pressure; based on this, the reasonable zinc plating process parameters can be developed.

Quantitative evaluation of the oxidation behavior of ZrB2-15 vol.%SiC at a low oxygen partial pressure

Vacuum ◽  
2013 ◽  
Vol 88 ◽  
pp. 98-102 ◽  
Author(s):  
Ai Momozawa ◽  
Rong Tu ◽  
Takashi Goto ◽  
Yuuki Kubota ◽  
Hiroshi Hatta ◽  
...  
Keyword(s):  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Quantitative Evaluation ◽  
Oxidation Behavior ◽  
Low Oxygen
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