Structure of Ultrafine Bubbles and Their Effects on Protein and Lipid Membrane Structures Studied by Small- and Wide-Angle X-ray Scattering
| Autor: | Noboru Ohta, Noriyuki Igarashi, Rika Kawai-Hirai, Nobutaka Shimizu, Satoshi Ajito, Kosuke Takahashi, Mitsuhiro Hirai, Durige Wen, Tatsuo Iwasa, Xing Li |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
010402 general chemistry 01 natural sciences Ion chemistry.chemical_compound X-Ray Diffraction Scattering Small Angle 0103 physical sciences Materials Chemistry Physical and Theoretical Chemistry Wide-angle X-ray scattering Lipid bilayer chemistry.chemical_classification Aqueous solution 010304 chemical physics Scattering Cell Membrane Membrane Proteins 0104 chemical sciences Surfaces Coatings and Films Hydrocarbon chemistry Chemical physics Liposomes Hydroxide Absorption (chemistry) |
| Zdroj: | The Journal of Physical Chemistry B. 123:3421-3429 |
| ISSN: | 1520-5207 1520-6106 |
| DOI: | 10.1021/acs.jpcb.9b00837 |
| Popis: | Ultrafine bubbles (UFBs) are defined as small gas-filled bubbles with a diameter smaller than 1 μm. UFBs are stable for several weeks in aqueous solutions due to their small size. Although the mechanism of the stability of UFBs remains under intensive investigation, industrial applications of UFBs have recently arisen in various fields such as agricultural and fishery industries and medical therapy. The relevance of ions (protons and hydroxide anions) in UFB solutions has been discussed; however, the mechanism underlying the behavior of UFBs is still ambiguous and there is little direct evidence of the effect of UFBs on biological materials. This study deals with gaseous UFBs in aqueous solutions. Using small- and wide-angle X-ray scattering, we have investigated the structures of UFBs (air-UFBs, O2-UFBs, and N2-UFBs) and their effect on protein and lipid membrane structures. X-ray scattering and modeling data suggest that UFBs present a dynamic diffusive boundary (interface) due to the continuous release and absorption of gas. UFBs were found to not affect the structures of proteins at all hierarchal structure levels (from quaternary to tertiary, to internal, to secondary), whereas they did influence the packing and fluctuation of the hydrocarbon chains in the liposomes but not their shapes. |
| Databáze: | OpenAIRE |
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