Micellar properties of octylglucoside in aqueous solutions

Kameyama, Keiichi; Takagi, Toshio

doi:10.1016/0021-9797(90)90037-o

Cited by 126 publications

(138 citation statements)

References 19 publications

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“…This is in accord with the observations reported by other authors for nonionic surfactants containing the saccharide moiety in their molecules (19,22,28), and it means that in the system a phase separation does not occur at higher temperatures, which is a common feature of oxyethylene chains containing nonionic surfactants.…”

Section: Resultssupporting

confidence: 93%

Synthesis and Surface Properties of N-Alkyl-N-methylgluconamides and N-Alkyl-N-methyllactobionamides

Burczyk

Wilk

Sokołowski

et al. 2001

Journal of Colloid and Interface Science

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Section: Resultssupporting

confidence: 93%

Synthesis and Surface Properties of N-Alkyl-N-methylgluconamides and N-Alkyl-N-methyllactobionamides

Burczyk

Wilk

Sokołowski

et al. 2001

Journal of Colloid and Interface Science

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“…However, we observed no cloud point for any of the 1% aqueous saccharide surfactant solutions with increasing temperature up to the boiling point of water. Similar behavior, with the absence of a cloud point up to 100ЊC, was reported for other saccharide-based nonionic surfactants, such as Nalkanoyl-N-methylglucamines (28), octylgucoside (29), and alkylglucamide (30). We attribute this result to the more favorable interactions between water molecules and hydroxyl groups in saccharides, compared with the corresponding interactions between water molecules and the oxygen atoms in polyoxyethylene.…”

Section: Surface Active Propertiessupporting

confidence: 81%

Novel Polysaccharide Surfactants: The Effect of Hydrophobic and Hydrophilic Chain Length on Surface Active Properties

Zhang

Marchant

1996

Journal of Colloid and Interface Science

127

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“…Dynamic light scattering yielded hydrodynamic radii of 23 ( 3, 28 ( 3, and 31 ( 3 Å for the OG micelles at concentration of 1, 2, and 5%(w/v), respectively (18). Similar measurement revealed a range of molecular weight from 25 000 to 36 000, depending on the temperature, for the OG micelles at low concentration (∼1%) (19). The molecular weights were also confirmed by a combination of sedimentation velocity and diffusion experiments (18).…”

Section: Estimation Of the Micelle Sizes Of Og Alone At High Concentrmentioning

confidence: 67%

Determination of the B820 Subunit Size of a Bacterial Core Light-Harvesting Complex by Small-Angle Neutron Scattering

et al. 2003

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The B820 subunit is an integral pigment-membrane protein complex and can be obtained by both dissociation of the core light-harvesting complex (LH1) in photosynthetic bacteria and reconstitution from its component parts in the presence of n-octyl -D-glucopyranoside (OG). Intrinsic size of the B820 subunit from Rhodospirillum rubrum LH1 complex was measured by small-angle neutron scattering in perdeuterated OG solution and evaluated by Guinier analysis. Both the B820 subunits prepared by dissociation of LH1 and reconstitution from apopolypeptides and pigments were shown to have a molecular weight of 11 400 ( 500 and radius of gyration of 11.0 ( 1.0 Å, corresponding to a heterodimer consisting of one pair of R -polypeptides and two bacteriochlorophyll a molecules. Molecular weights of micelles formed by OG alone in solutions were determined in a range from 30 000 to 50 000 over concentrations of 1-5% (w/v), and thus are much larger than that of the B820 subunit. Similar measurement on the pigment-depleted apopolypeptides revealed highly heterogeneous behavior in the OG solutions, indicating that aggregates with various sizes were formed. The result provides evidence that bacteriochlorophyll a molecules play a crucial role in stabilizing and maintaining the B820 subunits in the dimeric state in solution. Further measurements on individual R-and -polypeptides exhibited a marked difference in aggregation property between the two polypeptides. The R-polypeptides appear to be uniformly dissolved in OG solution in a monomeric form, whereas the -polypeptides favor a self-associated form and tend to form large aggregates even in the presence of detergent. The difference in aggregation tendency was discussed in relation to the different behavior between R-and -polypeptides in reconstitution with bacteriochlorophyll a molecules.Despite intense interest and continuing investigation, controversy over the nature of an intermediate form of bacterial core light-harvesting complexes (LH1 1 ) has not been settled. The LH1 complex, serving as highly efficient molecular machinery for collection and transfer of solar energy to photochemical reaction centers in photosynthetic bacteria, is a large multimer of a minimal unit composed of two small integral membrane polypeptides (R and , ca. 6 kDa) associated with two bacteriochlorophyll (BChl) and one carotenoid molecule. Upon addition of detergents, the LH1 multimer can be dissociated into a structural subunit characterized by a Q y absorption band at 820 nm (1). Both the subunit (referred to as B820) and LH1 complex can be reversibly dissociated and reconstituted from the their components (2). Early chromatographic studies by gel filtration estimated a range of molecular weight from 32 to 65 kDa for the B820 subunit, roughly corresponding to a tetramer composed of two minimal structural units (1, 3). In contrast, spectroscopic evidence suggested that the B820 is a heterodimer consisting of two interacting BChl a molecules linked to one R -polypeptide pair (4,5). Recently, ide...

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Micellar properties of octylglucoside in aqueous solutions

Cited by 126 publications

References 19 publications

Synthesis and Surface Properties of N-Alkyl-N-methylgluconamides and N-Alkyl-N-methyllactobionamides

Synthesis and Surface Properties of N-Alkyl-N-methylgluconamides and N-Alkyl-N-methyllactobionamides

Novel Polysaccharide Surfactants: The Effect of Hydrophobic and Hydrophilic Chain Length on Surface Active Properties

Determination of the B820 Subunit Size of a Bacterial Core Light-Harvesting Complex by Small-Angle Neutron Scattering

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