Comparison of positional surfactant isomers for displacement of rubisco protein from the air–water interface

He, Lizhong; Onaizi, Sagheer A.; Dimitrijev-Dwyer, Mirjana; Malcolm, Andrew S.; Shen, Hsin‐Hui; Dong, Chu Chuan; Holt, Stephen A.; Thomas, Robert K.; Middelberg, Anton P. J.

doi:10.1016/j.jcis.2011.04.060

Cited by 14 publications

(6 citation statements)

References 39 publications

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“…This could be caused by the charge screening due to the presence of a high concentration of the counter-ion [39]. The molecular surface area of SDBS estimated using the Frumkin model is strikingly the same as that reported using NR by He et al [40] for one of the SDBS isomers adsorption at the liquid-air interface. However, the molecular surface area of SDBS at the interface estimated using the Gibbs or Langmuir-Szyszkowski models (Eqs.…”

Section: Resultssupporting

confidence: 80%

“…Unlike the limited number of published studies on biosurfactant adsorption, the adsorption of synthetic surfactants at different interfaces has been widely studied (see for examples [6][7][8][9][10][11][12]). Adsorption from synthetic surfactants [7,13,14] or protein-surfactant [15,16] mixtures has been also addressed in some of the previously published studies. Additionally, a few studies have been conducted to investigate the adsorption of synthetic surfactant-biosurfactant mixtures at liquid-air interfaces [5,17,18].…”

Section: Introductionmentioning

confidence: 99%

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Benchmarking the Self‐Assembly of Surfactin Biosurfactant at the Liquid–Air Interface to those of Synthetic Surfactants

Onaizi

Nasser

Al-Lagtah

2016

J Surfact & Detergents

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The adsorption of surfactin, a lipopeptide biosurfactant, at the liquid–air interface has been investigated in this work. The maximum adsorption density and the nature and the extent of lateral interaction between the adsorbed surfactin molecules at the interface were estimated from surface tension data using the Frumkin model. The quantitative information obtained using the Frumkin model was also compared to those obtained using the Gibbs equation and the Langmuir–Szyszkowski model. Error analysis showed a better agreement between the experimental and the calculated values using the Frumkin model relative to the other two models. The adsorption of surfactin at the liquid–air interface was also compared to those of synthetic anionic, sodium dodecylbenzenesulphonate (SDBS), and nonionic, octaethylene glycol monotetradecyl ether (C14E8), surfactants. It has been estimated that the area occupied by a surfactin molecule at the interface is about 3- and 2.5-fold higher than those occupied by SDBS and C14E8 molecules, respectively. The interaction between the adsorbed molecules of the anionic biosurfactant (surfactin) was estimated to be attractive, unlike the mild repulsive interaction between the adsorbed SDBS molecules.

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Section: Resultssupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Benchmarking the Self‐Assembly of Surfactin Biosurfactant at the Liquid–Air Interface to those of Synthetic Surfactants

Onaizi

Nasser

Al-Lagtah

2016

J Surfact & Detergents

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“…The estimated molecular area using the Frumkin model is exactly the same as that reported by He et al [8] for one of the SDBS isomers adsorption at the air-liquid interface under similar experimental conditions using neutron reflectivity. However, Zhang et al [15] reported a molecular area of ≈53 Å 2 for SDBS adsorption at the air-water interface using neutron reflectivity; this area is slightly higher than that estimated using the Langmuir-Szyszkowski model.…”

Section: Sdbs Adsorption At the Air-liquid Interfacesupporting

confidence: 79%

“…Sodium dodecylbenzenesulphonate (SDBS), which might contain different isomers [7][8][9], was purchased from Sigma and used as received. The buffer ingredients (NaH 2 PO 4 and Na 2 HPO 4 ) were of analytical grades.…”

Section: Methodsmentioning

confidence: 99%

Adsorption of an anionic surfactant at air-liquid and different solid-liquid interfaces from solutions containing high counter-ion concentration

2015

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The self-assembly (adsorption) of the anionic surfactant, sodium dodecylbenzenesulphonate (SDBS), at airliquid and different (octadecanethiol, β-mercaptoethanol, α-lipoic acid) solid-liquid interfaces from aqueous solutions containing high concentrations of counter-ion has been investigated. SDBS adsorption at the solid-liquid interfaces was obtained using surface plasmon resonance (SPR) while its adsorption at the air-liquid interface was extracted from surface tension measurements. The results have demonstrated that SDBS packing at the air-liquid interface is similar to its packing at the hydrophobic octadecanethiol-liquid interface. Additionally, SDBS packing at the three solid-liquid interfaces increases with increasing surface hydrophobicity, irrespective whether the surface is neutral or negatively charged. Nonetheless, SDBS adsorption is always within monolayer coverage (no evidence of bilayer or admicelle formation). The results have also revealed that SDBS affinity for the solid-liquid interfaces increases with increasing surface hydrophobicity. Furthermore, SDBS affinity for the air-liquid interface is more than 10-fold its affinity for the solid-liquid interfaces.

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“…The phenomena of structural- (Barakat et al, 1983;De et al, 2010;He et al, 2011;Jie et al, 2005;Ma et al, 2006;Wu et al, 2005) and stereo-isomerism (Qi et al, 2011;Tickle et al, 1998) can be seen in surfactants of anionic (Barakat et al, 1983;Jie et al, 2005;Ma et al, 2006;Tickle et al, 1998), cationic (De et al, 2010;Qi et al, 2011;Zhang et al, 2010), zwitterionic (Amrhar et al, 1994), and nonionic (Wu et al, 2005), as well as giant surfactants (Wang et al, 2017;Zhang, Shan, et al, 2019), which offers an interesting chance to study SPR in surfactants. The properties, including adsorption at gas-liquid (He et al, 2011;Ma et al, 2006), liquid-liquid (Jie et al, 2005) and solid-liquid (Zhang et al, 2010) interfaces, the water solubility (Amrhar et al, 1994;Ma et al, 2006), the critical micelle concentration (cmc) (Amrhar et al, 1994;De et al, 2010;Ma et al, 2006), aggregation (De et al, 2010;Ma et al, 2006;Qi et al, 2011), and solubilization (Barakat et al, 1983) are remarkably different among the surfactant isomers. Obviously, studies of the aforementioned isomeric surfactants have shown that properties of solution and interface can be significantly altered by even small changes in the molecular structure of isomeric surfactants.…”

Section: Introductionmentioning

confidence: 99%

Effect of selenium‐position on the redox responsivity of isomeric selenium‐containing anionic surfactants

Chen

Zhu

Zhang

et al. 2021

J Surfact & Detergents

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The effect of Se-position on the redox responsivity of three isomeric seleniumcontaining surfactants (C m SeC n SO 4 Na, n = 3, 8, and 11, m + n = 15) was investigated under the conditions of monomer, micelle, and adsorbed layer at the liquid paraffin-water interface. The divalent selenide group in C m SeC n SO 4 Na (the reduction form, C m SeC n SO 4 Na-Re) was oxidized to a more hydrophilic tetravalent selenoxide by the oxidation with H 2 O 2 to afford C m SeOC n SO 4 Na (the oxidation form, C m SeC n SO 4 Na-Ox), and the selenoxide group of C m SeC n SO 4 Na-Ox could be reduced to selenide by the reduction with Na 2 SO 3 to form C m SeC n SO 4 Na-Re again. In the oxidation process of the monomeric C m SeC n SO 4 Na in water, no obvious difference in the oxidation responsivity among three Se-position isomers was observed. In contrast, a remarkable effect of the Se-position on the oxidation responsivity was observed in the cases of C m SeC n SO 4 Na self-assemblies, including micelles and adsorbed layers at the liquid paraffin-water interface. Both the steric hindrance of the well-organized self-assemblies and the hydrophobic microenvironment of the selenide group in the self-assemblies hindered the Se atom from reacting with H 2 O 2 . The greater n, the harder was the oxidation of Se with H 2 O 2 . In the reduction process of C m SeC n SO 4 Na-Ox, the hydrophilic selenoxide group was exposed outright to water, allowing the selenoxide group to readily react with Na 2 SO 3 regardless of whether C m SeC n SO 4 Na-Ox was self-assembled or not.

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Comparison of positional surfactant isomers for displacement of rubisco protein from the air–water interface

Cited by 14 publications

References 39 publications

Benchmarking the Self‐Assembly of Surfactin Biosurfactant at the Liquid–Air Interface to those of Synthetic Surfactants

Benchmarking the Self‐Assembly of Surfactin Biosurfactant at the Liquid–Air Interface to those of Synthetic Surfactants

Adsorption of an anionic surfactant at air-liquid and different solid-liquid interfaces from solutions containing high counter-ion concentration

Effect of selenium‐position on the redox responsivity of isomeric selenium‐containing anionic surfactants

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