Výsledky vyhledávání - "Robert K. Thomas"

Strong synergistic interactions in zwitterionic–anionic surfactant mixtures at the air–water interface and in micelles: The role of steric and electrostatic interactions

Autor: Kun Ma, Peixun Li, Zi Wang, Yao Chen, Mario Campana, James Doutch, Robert Dalgliesh, Armando Maestro, Robert K Thomas, Jeff Penfold

Publikováno v: Journal of Colloid and Interface Science. 613:297-310

[Hypothesis]: The milder interaction with biosystems makes the zwitterionic surfactants an important class of surfactants, and they are widely used in biological applications and in personal care formulations. An important aspect of those application

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::776435474d6b44a2439f61ae5418fd5c
https://doi.org/10.1016/j.jcis.2022.01.045

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In-Membrane Nanostructuring of Cationic Amphiphiles Affects Their Antimicrobial Efficacy and Cytotoxicity: A Comparison Study between a De Novo Antimicrobial Lipopeptide and Traditional Biocides

Autor: Ke Fa, Huayang Liu, Haoning Gong, Lin Zhang, Mingrui Liao, Xuzhi Hu, Daniela Ciumac, Peixun Li, John Webster, Jordan Petkov, Robert K. Thomas, Jian Ren Lu

Publikováno v: Fa, K, Liu, H, Gong, H, Zhang, L, Liao, M, Hu, X, Ciumac, D, Li, P, Webster, J, Petkov, J, Thomas, R K & Lu, J R 2022, ' In-Membrane Nanostructuring of Cationic Amphiphiles Affects Their Antimicrobial Efficacy and Cytotoxicity: A Comparison Study between a De Novo Antimicrobial Lipopeptide and Traditional Biocides ', Langmuir, vol. 38, no. 21, pp. 6623-6637 . https://doi.org/10.1021/acs.langmuir.2c00506

Cationic biocides have been widely used as active ingredients in personal care and healthcare products for infection control and wound treatment for a long time, but there are concerns over their cytotoxicity and antimicrobial resistance. Designed li

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7016aab6d2505e4079a56427edf2e420
https://doi.org/10.1021/acs.langmuir.2c00506

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Neutron reflection and the thermodynamics of the air-water interface

Autor: Jeffrey Penfold, Robert K. Thomas

By means of isotopic substitution, measurements of the neutron reflectivity (NR) from a flat water surface generally give model independent measurements of the amount of a chosen solute at the surface irrespective of whether the layer is a mixture or

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73cbe44f7a83894a7c4f9ad0981d078d
https://doi.org/10.1039/d2cp00053a

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Multivalent electrolyte induced surface ordering and solution self-assembly in anionic surfactant mixtures: Sodium dodecyl sulfate and sodium diethylene glycol monododecyl sulfate

Autor: Peixun Li, Mario Campana, Zifeng Yan, A. L. Washington, Jeffrey Penfold, Kun Ma, Zi Wang, John R. P. Webster, Yao Chen, Robert K. Thomas

Publikováno v: Journal of Colloid and Interface Science

The formation of surface multilayer structures, with the addition of multivalent electrolytes, has been observed in a range of different anionic surfactants; and notably the sodium oxyethylene glycol alkyl sulfate, SAES, and alkyl ester sulfonate, AE

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f73e09c4399bf902e3897ab1dd3f2fd4
https://doi.org/10.1016/j.jcis.2020.01.032

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Ground Water Recharge for Oklahoma--an Analysis of Past and Future Methodology

Autor: Robert K. Thomas

Publikováno v: Ground Water Quality and Agricultural Practices ISBN: 9781003069782
Ground Water Quality and Agricultural Practices

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cb5ce3af484b70e01036519cca4c77c0
https://doi.org/10.1201/9781003069782-6

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Surfactant/biosurfactant mixing: Adsorption of saponin/nonionic surfactant mixtures at the air-water interface

Autor: Kun Ma, Ian M. Tucker, Jeffrey Penfold, A. Burley, S.L. Hosking, Robert K. Thomas, Peixun Li, Rebecca J. L. Welbourn, J.R.P. Webster, R.E. Petkova

Saponins are naturally occurring biosurfactants present in a wide range of plant species. They are highly surface active glycosides, and are used to stabilise foams and emulsions in foods, beverages and cosmetics. They have great potential for an eve

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f9e479b62e0609a80c17988de4895848
https://doi.org/10.1016/j.jcis.2020.04.061

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Recent developments and applications of the thermodynamics of surfactant mixing

Autor: Robert K. Thomas, Jeffrey Penfold

In their diverse domestic, industrial and technological applications surfactants are invariably used as mixtures which optimise different aspects of their performance. The neutron scattering techniques of reflectivity and small-angle scattering have

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f91cbfa7296584d5f169a0ad66ad21f
https://ora.ox.ac.uk/objects/uuid:02e55b0e-2c04-4c93-874d-3c007454b93c

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The structure of alkyl ester sulfonate surfactant micelles: The impact of different valence electrolytes and surfactant structure on micelle growth

Autor: Zi Wang, David W. Roberts, Hui Xu, Zifeng Yan, Jeffrey Penfold, Diego Alba Venero, Robert K. Thomas, Jordan T. Petkov, Peixun Li, Yao Chen, Kun Ma

Publikováno v: Journal of Colloid and Interface Science

The ester sulfonate anionic surfactants are a potentially valuable class of sustainable surfactants. The micellar growth, associated rheological changes, and the onset of precipitation are important consequences of the addition of electrolyte and esp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3473b71e57f382876126af1bee511921
https://pubmed.ncbi.nlm.nih.gov/31518834

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Impact of molecular structure, headgroup and alkyl chain geometry, on the adsorption of the anionic ester sulfonate surfactants at the air-solution interface, in the presence and absence of electrolyte

Autor: David W. Roberts, Hui Xu, Mario Campana, Robert K. Thomas, Jeffrey Penfold, Kun Ma, Yao Chen, Zi Wang, Peixun Li, Zifeng Yan, Jordan T. Petkov

Publikováno v: Journal of Colloid and Interface Science

The transition from monolayer to multilayer adsorption at the air-water interface in the presence of multivalent counterions has been demonstrated for a limited range of anionic surfactants which exhibit increased tolerance to precipitation in the pr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::75eee34139575cf14739abdc9210c343
https://pubmed.ncbi.nlm.nih.gov/30861434

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