Self-association of sodium deoxycholate with EHEC cellulose cooperatively induced by sodium dodecanoate

Modolon, Samuel de Medeiros; Felippe, Arlindo C.; Fizon, Tiago E.; Silva, Luciano da; Paula, Marcos Marques da Silva; Dal-Bó, Alexandre Gonçalves

doi:10.1016/j.carbpol.2014.04.023

Cited by 5 publications

(4 citation statements)

References 39 publications

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“…Examination of surface tension has also shown evidence of molecular association between the BS, NaDC, and ethylhydroxyethyl cellulose in aqueous basic solutions. This was reflected in the observation of a first plateau in the surface tension-log BS concentration curve, followed by a decrease in surface tension above the concentration of cellulose ether saturation by NaDC, and a second plateau corresponding to the formation of pure BS micelles [56]. This could be considered a typical trend, similar to that shown in Figure 4 (middle panel) for mixtures of polymers and surfactants.…”

Section: Bs and Cellulose Etherssupporting

confidence: 56%

Bile salts in digestion and transport of lipids

Macierzanka

Torcello‐Gómez

Jungnickel

et al. 2019

Advances in Colloid and Interface Science

123

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Section: Bs and Cellulose Etherssupporting

confidence: 56%

Bile salts in digestion and transport of lipids

Macierzanka

Torcello‐Gómez

Jungnickel

et al. 2019

Advances in Colloid and Interface Science

123

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“…As a consequence, CAC in our system will only be related to the formation of pure polymer clusters and the occurrence of CMC must be ruled out. Such behavior has been widely reported in the literature [41][42][43][44].…”

Section: Resultssupporting

confidence: 62%

Coil Interpenetration, Segment Aggregation and Adsorption of PEG at Water/Air Interface

Rego

Melo

Neto

et al. 2017

J Surfact & Detergents

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Poly(ethylene glycol) (PEG), both as an oligomer and as a high molecular weight polymer, has been used as a surfactant active component in many applications, in its pure and unmodified structure, or as a block segment within more complex structures. Apart from assuming helical or coil conformations it may also undergo aggregation, depending on the solvent. In this work, we characterized the aggregation of PEG in water using surface tensiometry and turbidimetry. Aggregation was characterized by a non‐persistent surface tension plateau at higher PEG contents and confirmed by turbidimetry, which was correlated to the derivative of osmotic pressure in relation to concentration. One can divide a surface tension‐concentration curve into two regions, delimited by a characteristic concentration: one following a Langmuir adsorption isotherm (starting from a plateau equal to pure water surface tension) ending in a second plateau, and a second one (beginning at this plateau) following a Freundlich isotherm. The calculated surface excess for PEG segment adsorption was consistent with segment aggregation, indicating more two characteristic concentrations correlated to this occurrence. A total of three characteristic mer concentrations were found (6.2 × 10−7, 6 × 10−6, and 2 × 10−4mol L−1) and related to PEG segment aggregation states.

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“…SEC is a molecular-weight-based separation technique that is not used as an analytical technique but as a cleanup technique . SEC is important in purifying complex seafood matrices characterized with complex biopolymers, like sugars, lipids, and proteins, , that may bind to the stationary phase or co-elute with analytes of interest . Rigorous cleanup of extracts is necessary to prolong the lifetime of LC columns, minimize matrix interferences during detection, reduce deterioration of chromatographic resolution, and fractionate highly concentrated extracts before separation of AsLipids in lipid fractions, which will ensure achievement of good separation of arsenic by reversed-phase liquid chromatography (RP-LC) on C8 or C18 columns. ,,, …”

Section: Sample Cleanup Proceduresmentioning

confidence: 99%

Analytical Methodologies for the Determination of Organoarsenicals in Edible Marine Species: A Review

Luvonga

Rimmer

et al. 2020

J. Agric. Food Chem.

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Setting regulatory limits for arsenic in food is complicated, owing to the enormous diversity of arsenic metabolism in humans, lack of knowledge about the toxicity of these chemicals, and lack of accurate arsenic speciation data on foodstuffs. Identification and quantification of the toxic arsenic compounds are imperative to understanding the risk associated with exposure to arsenic from dietary intake, which, in turn, underscores the need for speciation analysis of the food. Arsenic speciation in seafood is challenging, owing to its existence in myriads of chemical forms and oxidation states. Interconversions occurring between chemical forms, matrix complexity, lack of standards and certified reference materials, and lack of widely accepted measurement protocols present additional challenges. This review covers the current analytical techniques for diverse arsenic species. The requirement for high-quality arsenic speciation data that is essential for establishing legislation and setting regulatory limits for arsenic in food is explored.

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Self-association of sodium deoxycholate with EHEC cellulose cooperatively induced by sodium dodecanoate

Cited by 5 publications

References 39 publications

Bile salts in digestion and transport of lipids

Bile salts in digestion and transport of lipids

Coil Interpenetration, Segment Aggregation and Adsorption of PEG at Water/Air Interface

Analytical Methodologies for the Determination of Organoarsenicals in Edible Marine Species: A Review

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