924 Determination of Condensation Coefficient for Methanol : Measurement of Liquid film Growth By using Optical Interferometer at the Shock Tube Endwall

2005 ◽  
Vol 2005.7 (0) ◽  
pp. 85-86
Author(s):  
Satoru MIKAMI ◽  
Tatsuki OTA ◽  
Kazumichi KOBAYASHI ◽  
Sigeo FUJIKAWA ◽  
Takeru YANO ◽  
...  
Keyword(s):  
Liquid Film ◽  
Shock Tube ◽  
Film Growth ◽  
Condensation Coefficient ◽  
Optical Interferometer

925 Determination of Condensation Coefficient for Methanol : Numerical Analysis Based on Molecular Gas Dynamics for Shock Tube Experiment

2005 ◽  
Vol 2005.7 (0) ◽  
pp. 87-88
Author(s):  
Kazumichi KOBAYASHI ◽  
Satoru MIKAMI ◽  
Tatsuki OTA ◽  
Takeru YANO ◽  
Shigeo FUJIKAWA ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Shock Tube ◽  
Gas Dynamics ◽  
Molecular Gas ◽  
Condensation Coefficient ◽  
Shock Tube Experiment

Determination of Condensation Coefficient of Methanol Vapor by Shock Tube and Molecular Gas Dynamics

2004 ◽  
Vol 2004.2 (0) ◽  
pp. 375-376
Author(s):  
Tatsuki OTA ◽  
Satoru MIKAMI ◽  
Sigeo FUJIKAWA ◽  
Takeru YANO ◽  
Makoto ICHIJO
Keyword(s):  
Shock Tube ◽  
Gas Dynamics ◽  
Molecular Gas ◽  
Condensation Coefficient ◽  
Methanol Vapor

Volume measurements of28Si-enriched spheres using an improved optical interferometer for the determination of the Avogadro constant

Metrologia ◽  
2017 ◽  
Vol 54 (2) ◽  
pp. 193-203 ◽  
Author(s):  
Naoki Kuramoto ◽  
Yasushi Azuma ◽  
Hajime Inaba ◽  
Kenichi Fujii
Keyword(s):  
Optical Interferometer ◽  
Avogadro Constant ◽  
Volume Measurements

Ellipsometric Measurement of Bacterial Films at Metal-Electrolyte Interfaces

1998 ◽  
Vol 64 (10) ◽  
pp. 3690-3697 ◽  
Author(s):  
J. P. Busalmen ◽  
S. R. de Sánchez ◽  
D. J. Schiffrin
Keyword(s):  
Film Growth ◽  
Film Formation ◽  
High Sensitivity ◽  
Bacterial Attachment ◽  
Optical Measurements ◽  
Ellipsometric Measurement ◽  
Effective Medium Model ◽  
Bacterial Films ◽  
Bacterial Film

ABSTRACT Ellipsometric measurements were used to monitor the formation of a bacterial cell film on polarized metal surfaces (Al-brass and Ti). Under cathodic polarization bacterial attachment was measured from changes in the ellipsometric angles. These were fitted to an effective medium model for a nonabsorbing bacterial film with an effective refractive index (nf ) of 1.38 and a thickness (df ) of 160 ± 10 nm. From the optical measurements a surface coverage of 17% was estimated, in agreement with direct microscopic observations. The influence of bacteria on the formation of oxide films was monitored by ellipsometry following the film growth in situ. A strong inhibition of metal oxide film formation was observed, which was assigned to the decrease in oxygen concentration due to the presence of bacteria. It is shown that the irreversible adhesion of bacteria to the surface can be monitored ellipsometrically. Electrophoretic mobility is proposed as one of the factors determining bacterial attachment. The high sensitivity of ellipsometry and its usefulness for the determination of growth of interfacial bacterial films is demonstrated.

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