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dilational-visco-elasticity
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Bacteria cell hydrophobicity and interfacial properties relationships: A new MEOR approach
, Article Colloids and Interfaces ; Volume 5, Issue 4 , 2021 ; 25045377 (ISSN) ; Javadi, A ; Jahanbani Veshareh, M ; Ayatollahi, S ; Miller, R ; Sharif University of Technology
MDPI
2021
Abstract
For microbial enhanced oil recovery (MEOR), different mechanisms have been introduced. In some of these papers, the phenomena and mechanisms related to biosurfactants produced by certain microorganisms were discussed, while others studied the direct impacts of the properties of microorganisms on the related mechanisms. However, there are only very few papers dealing with the direct impacts of microorganisms on interfacial properties. In the present work, the interfacial properties of three bacteria MJ02 (Bacillus Subtilis type), MJ03 (Pseudomonas Aeruginosa type), and RAG1 (Acinetobacter Calcoaceticus type) with the hydrophobicity factors 2, 34, and 79% were studied, along with their direct...
Fast dynamic interfacial tension measurements and dilational rheology of interfacial layers by using the capillary pressure technique
, Article Colloids and Surfaces A: Physicochemical and Engineering Aspects ; Volume 407 , August , 2012 , Pages 159-168 ; 09277757 (ISSN) ; Krägel, J ; Makievski, A. V ; Kovalchuk, V. I ; Kovalchuk, N. M ; Mucic, N ; Loglio, G ; Pandolfini, P ; Karbaschi, M ; Miller, R ; Sharif University of Technology
Elsevier
2012
Abstract
The oscillating drop and bubble analyzer (ODBA) is an experimental set-up based on the measurement of capillary pressure under static and dynamic conditions. It allows studies of slow and fast dynamic surface and interfacial tensions, following different growing and oscillating drop or bubble protocols, as well as determination of the dilational interfacial visco-elasticity of liquid interfacial layers. For the visco-elasticity studies, drops or bubbles are subjected to harmonic oscillations of area or volume in a broad frequency range, and the resulting harmonic capillary pressure response is analyzed by Fourier analysis. Also, transient relaxations can be easily performed, which are of...