Interactions between organized, surface-confined monolayers and vapor-phase probe molecules. 7. Comparison of self-assembling n-alkanethiol monolayers deposited on gold from liquid and vapor phases

1993 ◽  
Vol 115 (26) ◽  
pp. 12459-12467 ◽  
Author(s):  
Orawon Chailapakul ◽  
Li Sun ◽  
Chuanjing Xu ◽  
Richard M. Crooks
Keyword(s):  
Vapor Phase ◽  
Probe Molecules ◽  
Self Assembling ◽  
Liquid And Vapor Phases

scholarly journals Validation of Qualitative Broth Volatilization Checkerboard Method for Testing of Essential Oils: Dual-Column GC–FID/MS Analysis and In Vitro Combinatory Antimicrobial Effect of Origanum vulgare and Thymus vulgaris against Staphylococcus aureus in Liquid and Vapor Phases

Plants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 393
Author(s):  
Marie Netopilova ◽  
Marketa Houdkova ◽  
Klara Urbanova ◽  
Johana Rondevaldova ◽  
Ladislav Kokoska
Keyword(s):  
Staphylococcus Aureus ◽  
Essential Oils ◽  
Vapor Phase ◽  
Antimicrobial Agents ◽  
Gas Chromatography Mass Spectrometry ◽  
Thymus Vulgaris ◽  
Origanum Vulgare ◽  
Dual Column ◽  
Liquid And Vapor Phases

Combinatory action of antimicrobial agents such as essential oils (EOs) show to be an effective strategy to overcome the problem with increasing antibiotic resistance of microorganisms, including Staphylococcus aureus. The objective of this study was to evaluate in vitro antimicrobial interactions between Origanum vulgare and Thymus vulgaris EOs against various S.aureus strains in both liquid and vapor phases using the broth volatilization checkerboard method. Fractional inhibitory concentrations (FICs) were determined for both liquid and vapor phases, and the composition of EOs was analyzed by gas chromatography-mass spectrometry using dual-column/dual-detector gas chromatograph. Results of oregano and thyme EOs combination showed additive effects against all S. aureus strains in both phases. In several cases, sums of FICs were lower than 0.6, which can be considered a strong additive interaction. The lowest FICs obtained were 0.53 in the liquid phase and 0.59 in the gaseous phase. Chemical analysis showed that both EOs were composed of many compounds, including carvacrol, thymol, γ-terpinene, and p-cymene. This is the first report on oregano and thyme EOs interactions against S. aureus in the vapor phase. It also confirms the accuracy of the broth volatilization checkerboard method for the evaluation of combinatory antimicrobial effects of EOs in the vapor phase.

The Local Evaporation Flux Along the Interface of a Droplet

2009 ◽  
Author(s):  
Fei Duan
Keyword(s):  
Vapor Phase ◽  
Thermal Conduction ◽  
Thermocapillary Convection ◽  
Water Evaporation ◽  
Rate Theory ◽  
Statistical Rate Theory ◽  
Turbulent Transition ◽  
State Water ◽  
Evaporation Flux ◽  
Liquid And Vapor Phases

In steady-state water evaporation, the local evaporation flux is found uniform before the thermocapillary convection transition at the droplet. If the thermocapillary flow is present, the local evaporation flux becomes nonuniform as a result of effects of thermal conduction from liquid and vapor phases, thermocapillary convection at interface, or the viscous dissipation after the interfacial turbulent transition. The local vapor-phase pressures predicted from statistical rate theory become nonuniform after the thermocapillary convection transition. But, the average predicted pressure agrees with the measured vapor-phase pressure.

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