Some observations on the effect of the trivalent counterion Al3+ to the self-assembly of sodium dodecyl sulphate in water

2004 ◽  
Vol 245 (1-3) ◽  
pp. 49-60 ◽  
Author(s):  
Daniel Angelescu ◽  
Horia Caldararu ◽  
Ali Khan
Keyword(s):  
Sodium Dodecyl Sulphate ◽  
Self Assembly ◽  
Sodium Dodecyl ◽  
The Self

Creation of hollow microtubular iron oxalate dihydrate induced by a metallo-supramolecular micelle based on the self-assembly of potassium ferrioxalate and sodium dodecyl sulphate

RSC Advances ◽  
2015 ◽  
Vol 5 (48) ◽  
pp. 38006-38010 ◽  
Author(s):  
Yue Teng ◽  
Le Xin Song ◽  
Wei Liu ◽  
Juan Xia ◽  
Li Zhao ◽  
...  
Keyword(s):  
Sodium Dodecyl Sulphate ◽  
Self Assembly ◽  
Room Temperature ◽  
Sodium Dodecyl ◽  
The Self ◽  
Iron Oxalate ◽  
Oxalate Dihydrate

A novel metallo-supramolecular micelle PF–SDS–SM was formed at room temperature through the self-assembly of potassium ferrioxalate and sodium dodecyl sulphate.

Impact of Model Perfume Molecules on the Self-Assembly of Anionic Surfactant Sodium Dodecyl 6-Benzene Sulfonate

Langmuir ◽  
2013 ◽  
Vol 29 (10) ◽  
pp. 3234-3245 ◽  
Author(s):  
Robert Bradbury ◽  
Jeffrey Penfold ◽  
Robert K. Thomas ◽  
Ian M. Tucker ◽  
Jordan T. Petkov ◽  
...  
Keyword(s):  
Anionic Surfactant ◽  
Self Assembly ◽  
Sodium Dodecyl ◽  
The Self ◽  
Benzene Sulfonate

Self-Assembly of Pulp Derivatives as Amphiphilic Compounds: Verification of Molecular Association and Complexation with Low and High Molecular Mass Compounds

Holzforschung ◽  
2000 ◽  
Vol 54 (5) ◽  
pp. 535-540 ◽  
Author(s):  
Y. Uraki ◽  
A. Hanzaki ◽  
K. Hashida ◽  
Y. Sano
Keyword(s):  
Molecular Mass ◽  
Self Assembly ◽  
Sodium Dodecyl ◽  
High Molecular Mass ◽  
Water Soluble ◽  
The Self ◽  
Reduced Viscosity ◽  
Amphiphilic Compounds ◽  
Initial Stage ◽  
Ph Conditions

Summary Acetic acid pulps (AAPs) have been converted to amphiphiles by hydroxypropylation. The resulting hydroxypropyl derivatives (HP-AAPs) formed self-aggregates in water. The interaction of HP-AAP molecules was investigated by a viscometric method. The reduced viscosity (η sp/c) of HP-AAP in both water and chloroform was increased remarkably above a concentration of 0.1%. This implies that HP-AAP molecules strongly interact with each other, caused by the hydrophobic interaction of residual lignins in water and by hydrogen bonding of polysaccharides in chloroform. The self-aggregates adsorb water-soluble fluorescent agents. The highest adsorption capacity was observed at the lowest pH among three pH conditions investigated. They also solubilized sparingly water-soluble fluorescent agents in water in larger amounts than did sodium dodecyl sulfate when used as a surfactant. These results suggest that the self-aggregates of HP-AAP adsorb low molecular mass compounds as inclusion compounds. To clarify the interaction of HP-AAP with biopolymers as high molecular mass compounds, the change in the activity of papain, a protease, in phosphate buffer (pH 6.2) was examined in the presence and absence of HP-AAP. HP-AAP acted as an inhibitor of papain at the initial stage of mixing. After mixing for 24 hours, however, the papain activity was revived and preserved for 6 days. In contrast, the papain activity vanished in the absence of HP-AAP after 24 hours because of autolysis. Therefore, HP-AAP protects papain against autolysis, resulting from tight complexation with the biopolymer.

scholarly journals Effect of [Zr(α-PW11O39)2]10− Polyoxometalate on the Self-Assembly of Surfactant Molecules in Water Studied by Fluorescence and DOSY NMR Spectroscopy

Inorganics ◽  
2018 ◽  
Vol 6 (4) ◽  
pp. 112 ◽  
Author(s):  
Thomas Quanten ◽  
Pavletta Shestakova ◽  
Aleksandar Kondinski ◽  
Tatjana Parac-Vogt
Keyword(s):  
Nmr Spectroscopy ◽  
Self Assembly ◽  
Aqueous Media ◽  
Sodium Dodecyl ◽  
Critical Micellar Concentration ◽  
The Self ◽  
Catalytically Active ◽  
Keggin Polyoxometalate ◽  
Kinetics Of ◽  
And Diffusion

The catalytic fragmentation of hydrophobic proteins by polyoxometalates (POMs) requires the presence of surfactants in order to increase the solubility of the protein. Depending on the nature of the surfactant, different effects on the kinetics of protein hydrolysis are observed. As the molecular interactions between the POMs and surfactants in solutions have been scarcely explored, in this study, the interaction between the catalytically active Keggin polyoxometalate [Zr(α-PW11O39)2]10− and four different surfactants—sodium dodecyl sulfate (SDS), dodecyldimethyl(3-sulfopropyl)ammonium (Zw3-12), dodecyldimethyl(3-sulfopropyl) ammonium (CHAPS), and polyethylene glycol tert-octylphenyl ether (TX-100)—have been studied in aqueous media. The effect of polyoxometalate on the self-assembly of surfactant molecules into micelles and on the critical micellar concentration (CMC) has been examined by fluorescence spectroscopy and diffusion ordered NMR spectroscopy (DOSY).

scholarly journals Promoted Disappearance of CO2 Hydrate Self-Preservation Effect by Surfactant SDS

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3909
Author(s):  
Xueping Chen ◽  
Shuaijun Li ◽  
Peng Zhang ◽  
Wenting Chen ◽  
Qingbai Wu ◽  
...  
Keyword(s):  
Silica Gel ◽  
Sodium Dodecyl Sulphate ◽  
Shell Theory ◽  
Pure Water ◽  
Sodium Dodecyl ◽  
The Self ◽  
Uniform Heating ◽  
Co2 Gas ◽  
Gas Molecules ◽  
Ice Shell

The capture, storage and utilization of CO2 through hydrate-related technology is a promising approach to addressing the global warming issue. Dissociation is required after the transportation of CO2 gas in the form of a self-preserving hydrate. In order to investigate the dissociation behaviors as the self-preservation effect is removed, CO2 hydrates were frozen, and then the self-preservation effect was removed through uniform heating. An evident dependence of hydrate dissociation duration on the initial dissociation rates after losing the preservation effect was observed. The results in the silica gel powder and sodium dodecyl sulphate solution showed significant reductions in the initial dissociation temperatures and a slight decrease in the initial dissociation rates when compared with those of pure water. The reductions in the former were 2.88, 2.89, and 5.73 °C in silica gel, sodium dodecyl sulphate, and a combination of the two, respectively, while the reductions in the latter were 0.12, 0.12, and 0.16 mmol/min, respectively. As the results are inconsistent with the conventional mechanism elucidating a self-preservation effect, the ice shell theory was hence further supplemented by introducing innovative contribution factors—nonenclathrated liquid water and gas molecules dissolved inside. These findings are expected to provide references for CO2 gas transportation and usage of the self-preservation effect.

The Nature of Rapidly Extracted Phycocyanin from the Blue-Green Alga Plectonema Boryanum

1971 ◽  
Vol 29 ◽  
pp. 366-367
Author(s):  
M. Kessel ◽  
R. MacColl
Keyword(s):  
Self Assembly ◽  
Analytical Ultracentrifugation ◽  
Uranyl Acetate ◽  
The Self ◽  
Major Protein ◽  
Subunit Structure ◽  
Blue Green Alga ◽  
Thin Sections ◽  
Blue Green Algae ◽  
Cacodylate Buffer

The major protein of the blue-green algae is the biliprotein, C-phycocyanin (Amax = 620 nm), which is presumed to exist in the cell in the form of distinct aggregates called phycobilisomes. The self-assembly of C-phycocyanin from monomer to hexamer has been extensively studied, but the proposed next step in the assembly of a phycobilisome, the formation of 19s subunits, is completely unknown. We have used electron microscopy and analytical ultracentrifugation in combination with a method for rapid and gentle extraction of phycocyanin to study its subunit structure and assembly.To establish the existence of phycobilisomes, cells of P. boryanum in the log phase of growth, growing at a light intensity of 200 foot candles, were fixed in 2% glutaraldehyde in 0.1M cacodylate buffer, pH 7.0, for 3 hours at 4°C. The cells were post-fixed in 1% OsO4 in the same buffer overnight. Material was stained for 1 hour in uranyl acetate (1%), dehydrated and embedded in araldite and examined in thin sections.

Interrelationship of the cellular distribution and secretion of regular structure (RS) protein in Bacillus licheniformis nm 105

1992 ◽  
Vol 50 (1) ◽  
pp. 712-713
Author(s):  
Xiaorong Zhu ◽  
Richard McVeigh ◽  
Bijan K. Ghosh
Keyword(s):  
Alkaline Phosphatase ◽  
Bacillus Licheniformis ◽  
Self Assembly ◽  
Gel Electrophoresis ◽  
Culture Supernatant ◽  
Regular Structure ◽  
The Self ◽  
Cellular Distribution ◽  
Structural Protein ◽  
Laboratory Cultures

A mutant of Bacillus licheniformis 749/C, NM 105 exhibits some notable properties, e.g., arrest of alkaline phosphatase secretion and overexpression and hypersecretion of RS protein. Although RS is known to be widely distributed in many microbes, it is rarely found, with a few exceptions, in laboratory cultures of microorganisms. RS protein is a structural protein and has the unusual properties to form aggregate. This characteristic may have been responsible for the self assembly of RS into regular tetragonal structures. Another uncommon characteristic of RS is that enhanced synthesis and secretion which occurs when the cells cease to grow. Assembled RS protein with a tetragonal structure is not seen inside cells at any stage of cell growth including cells in the stationary phase of growth. Gel electrophoresis of the culture supernatant shows a very large amount of RS protein in the stationary culture of the B. licheniformis. It seems, Therefore, that the RS protein is cotranslationally secreted and self assembled on the envelope surface.

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