Two-dimensional surface properties of PEO–PPO–PEO triblock copolymer film at the air/water interface in the absence and presence of Tyr-Phe dipeptide, Val-Tyr-Val tripeptide, SDS and stearic acid

James, Jilly; Ramalechume, C.; Mandal, Asit Baran

doi:10.1016/j.colsurfb.2010.09.007

Cited by 12 publications

(7 citation statements)

References 44 publications

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“…This concentration is known as extended CMC or CMC e which is higher than the CMC of pure HTAB solution. Such types of curvatures are observed for the systems of pepsin–HTAB, NaCMC–HTAB, myoglobin–gemini surfactants, lysozyme–SDS, and many other systems. − …”

Section: Resultsmentioning

confidence: 89%

Interaction of Myoglobin with Cationic and Nonionic Surfactant in Phosphate Buffer Media

et al. 2016

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Interaction of myoglobin with cationic surfactants hexadecyltrimethylammonium bromide (HTAB), gemini surfactant 16-2-16 (dimethylene-1,2-bis(hexadecyldimethylammonium bromide)) and nonionic surfactant Mega 10 (N-decanoyl-N-methylglucamine) have been studied in phosphate buffer at pH 7.4 using surface tension, UV−visible, fluorescence, and circular dichroism spectroscopies and differential scanning calorimetry. With increasing concentration of HTAB, metal ion of the heme group changes its spin states; but in case of 16-2-16 and Mega 10, spin change does not occur. Fluorescence spectra clearly denote the unfolding process in HTAB media. With increasing HTAB concentration, α-helicity of myoglobin decreases with the appearance of β-sheet and random coil more rapidly than other two surfactants. Melting temperature of myoglobin is reduced drastically upon interaction with HTAB than their corresponding gemini and nonionic surfactants.

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Section: Resultsmentioning

confidence: 89%

Interaction of Myoglobin with Cationic and Nonionic Surfactant in Phosphate Buffer Media

et al. 2016

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“…We herein add that the two-dimensional surface properties of the pluronic Langmuir monolayer film at the air/water interface in the absence and presence of di- and tripeptide as well as SDS and stearic acid have been studied in detail by Mandal et al The pluronic concentration below and above the CMC made a difference in the monolayer properties. They have also studied insoluble and soluble monolayers of geminis and the antidepressant drug hydantoin, which led to concept of dry micelle formation at the interface.…”

Section: Resultsmentioning

confidence: 97%

Solution Behavior of Normal and Reverse Triblock Copolymers (Pluronic L44 and 10R5) Individually and in Binary Mixture

2012

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Solution properties of pluronics L44 or L [(PEO)(10)(PPO)(23)(PEO)(10)] and 10R5 or R [(PPO)(8)(PEO)(22)(PPO)(8)] were studied individually as well in their binary mixtures in aqueous medium. The critical micelle concentration (CMC), critical micelle temperature, and cloud point (CP) were determined. Ideal and nonideal behaviors of their mixtures in the formation of CMC and CP were observed; the energetics of the studied processes were determined. Spectrophotometry, isothermal titration calorimetry and dynamic light scattering (DLS) methods were used for evaluations. Morphologies of the dispersed L, R, and their mixtures along with their polydispersities were determined from DLS measurements. Atomic force microscopy was also employed. The interfacial properties of L and R were investigated forming Langmuir monolayers in a surface balance. The surface pressures (π) generated by the compounds were moderate, the area per molecule was higher for R than L. R has shown antibacterial activity against both gram positive and gram negative bacteria whereas L was inactive in this respect.

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“…In the past two decades, biocompatible polymers have attracted great attention in the field of medical applications, such as drug delivery, gene therapy, surface coatings, and tissue engineering. , Amphiphilic and biodegradable polymers are attractive candidates for drug delivery systems with potential to improve drug circulation time, increase drug solubility, and reduce toxicity and side effect. , Among a large family of these polymers, nonionic triblock copolymers composed of poly(propylene oxide) (PPO) hydrophobic midblock and two poly(ethylene oxide) (PEO) hydrophilic end blocks (PEO–PPO–PEO, commercially known as Pluronic or Poloxamer) are of particular interest for properties of adsorption, self-assembly, and micellization. − More recently, PEO–PPO–PEO has been found to be able to seal damaged cell membrane with low toxicity, which is probably due to its surface activity and adsorption capacity into the bilayer of the damaged cell. , …”

Section: Introductionmentioning

confidence: 99%

Interaction between Graphene Oxide and Pluronic F127 at the Air–Water Interface

Guo

Patel

et al. 2013

Langmuir

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Triblock copolymer Pluronic F127 (PF127) has previously been demonstrated to disperse graphene oxide (GO) in electrolyte solution and block the hydrophobic interaction between GO and l-tryptophan and l-tyrosine. However, the nature of this interaction between PF127 and GO remains to be characterized and elucidated. In the present study, we aimed to characterize and understand the interaction between GO and PF127 using a 2-dimensional Langmuir monolayer methodology at the air-water interface by surface pressure-area isotherm measurement, stability, adsorption, and atomic force microscopy (AFM) imaging. Based on the observation of surface pressure-area isotherms, adsorption, and stability of PF127 and PF127/GO mixture at the air-water interface, GO is suggested to change the conformation of PF127 at the air-water interface and also drag PF127 from the interface to the bulk subphase. Atomic force microscopy (AFM) image supports this assumption, as GO and PF127 can be observed by spreading the subphase solution outside the compressing barriers, as shown in the TOC graphic.

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Two-dimensional surface properties of PEO–PPO–PEO triblock copolymer film at the air/water interface in the absence and presence of Tyr-Phe dipeptide, Val-Tyr-Val tripeptide, SDS and stearic acid

Cited by 12 publications

References 44 publications

Interaction of Myoglobin with Cationic and Nonionic Surfactant in Phosphate Buffer Media

Interaction of Myoglobin with Cationic and Nonionic Surfactant in Phosphate Buffer Media

Solution Behavior of Normal and Reverse Triblock Copolymers (Pluronic L44 and 10R5) Individually and in Binary Mixture

Interaction between Graphene Oxide and Pluronic F127 at the Air–Water Interface

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