Kinetics of the reactions of hydroxyl radicals with aliphatic ethers studied under simulated atmospheric conditions

1989 ◽  
Vol 8 (1) ◽  
pp. 87-94 ◽  
Author(s):  
Paul J. Bennett ◽  
J. Alistair Kerr
Keyword(s):  
Hydroxyl Radicals ◽  
Atmospheric Conditions ◽  
Kinetics Of ◽  
Aliphatic Ethers

Reactivity studies of organic substances towards hydroxyl radicals under atmospheric conditions

1982 ◽  
Vol 16 (3) ◽  
pp. 545-550 ◽  
Author(s):  
I. Barnes ◽  
V. Bastian ◽  
K.H. Becker ◽  
E.H. Fink ◽  
F. Zabel
Keyword(s):  
Hydroxyl Radicals ◽  
Organic Substances ◽  
Atmospheric Conditions

In vivo assessment of human vaginal oxygen and carbon dioxide levels during and post menses

2005 ◽  
Vol 99 (4) ◽  
pp. 1582-1591 ◽  
Author(s):  
Donna R. Hill ◽  
Marianne E. Brunner ◽  
Deborah C. Schmitz ◽  
Catherine C. Davis ◽  
Janine A. Flood ◽  
...  
Keyword(s):  
Animal Studies ◽  
Pathogenic Bacteria ◽  
Sensor Technology ◽  
Atmospheric Conditions ◽  
Bacterial Virulence Factor ◽  
Carbon Dioxide Levels ◽  
Kinetics Of ◽  
Insertion Process

Previous in vitro and in vivo animal studies showed that O2and CO2concentrations can affect virulence of pathogenic bacteria such as Staphylococcus aureus. The objective of this work was to measure O2and CO2levels in the vaginal environment during tampon wear using newly available sensor technology. Measurements by two vaginal sensors showed a decrease in vaginal O2levels after tampon insertion. These decreases were independent of the type of tampons used and the time of measurement (mid-cycle or during menstruation). These results are not in agreement with a previous study that concluded that oxygenation of the vaginal environment during tampon use occurred via delivery of a bolus of O2during the insertion process. Our measurements of gas levels in menses showed the presence of both O2and CO2in menses. The tampons inserted into the vagina contained O2and CO2levels consistent with atmospheric conditions. Over time during tampon use, levels of O2in the tampon decreased and levels of CO2increased. Tampon absorbent capacity, menses loading, and wear time influenced the kinetics of these changes. Colonization with S. aureus had no effect on the gas profiles during menstruation. Taken collectively, these findings have important implications on the current understanding of gaseous changes in the vaginal environment during menstruation and the potential role(s) they may play in affecting bacterial virulence factor production.

Sorption Kinetics of High Pressure Gases in Polymeric Tubing Materials

2006 ◽  
Author(s):  
P. Jaeger ◽  
S. Buchner ◽  
R. Eggers
Keyword(s):  
Diffusion Coefficients ◽  
Gas Permeability ◽  
Gravimetric Method ◽  
Sorption Kinetics ◽  
Operating Pressure ◽  
Gas Solubility ◽  
Atmospheric Conditions ◽  
High Solubility ◽  
Industrial Practice ◽  
Kinetics Of

A gravimetric method was applied to determine the sorption kinetics of gases into polymers. Diffusivity as well as sorption capacity are determined directly. Data of gas permeability that are required for calculating leakage rates in polymeric flexile gas and oil ducts may be retrieved by multiplying the obtained diffusion coefficients and the gas solubility. In general carbon dioxide enters polymers to the highest extent. In industrial practice, the high solubility of CO2 e.g. may lead to explosive decompression of sealings once the operating pressure is reduced to atmospheric conditions. Diffusion coefficients are presented in the range of 75 to 130°C at 2 to 30 MPa.

scholarly journals Kinetics of the Reactions of Hydroxyl Radicals with Furan and Its Alkylated Derivatives 2-Methyl Furan and 2,5-Dimethyl Furan

2020 ◽  
Vol 124 (37) ◽  
pp. 7416-7426
Author(s):  
Charlotte A. Whelan ◽  
Julia Eble ◽  
Zara S. Mir ◽  
Mark A. Blitz ◽  
Paul W. Seakins ◽  
...  
Keyword(s):  
Hydroxyl Radicals ◽  
Kinetics Of
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