Synthesis, Surface Properties, and Hydrolysis of Chemodegradable Anionic Surfactants:  Diastereomerically Pure Sodiumcis- andtrans-(2-n-Alkyl-1,3-dioxan-5-yl) Sulfates†

Langmuir ◽  
1997 ◽  
Vol 13 (6) ◽  
pp. 1434-1439 ◽  
Author(s):  
Andrzej Piasecki ◽  
Adam Sokołowski ◽  
Bogdan Burczyk ◽  
Roman Gancarz ◽  
Urszula Kotlewska
Keyword(s):  
Surface Properties ◽  
Anionic Surfactants ◽  
Hydrolysis Of

Synthesis, Surface Properties, and Hydrolysis of Chemodegradable Anionic Surfactants: Diastereomerically Purecis- andtrans-2,5-Disubstituted-1,3-dioxanes

1997 ◽  
Vol 192 (1) ◽  
pp. 74-82 ◽  
Author(s):  
Andrzej Piasecki ◽  
Adam Sokołowski ◽  
Bogdan Burczyk ◽  
Roman Gancarz ◽  
Urszula Kotlewska
Keyword(s):  
Surface Properties ◽  
Anionic Surfactants ◽  
Hydrolysis Of

The influence of negatively charged silica nanoparticles on the surface properties of anionic surfactants: electrostatic repulsion or the effect of ionic strength?

2020 ◽  
Vol 22 (4) ◽  
pp. 2238-2248 ◽  
Author(s):  
Milad Eftekhari ◽  
Karin Schwarzenberger ◽  
Aliyar Javadi ◽  
Kerstin Eckert
Keyword(s):  
Ionic Strength ◽  
Silica Nanoparticles ◽  
Surface Properties ◽  
Surface Activity ◽  
Aqueous Phase ◽  
Anionic Surfactants ◽  
Electrostatic Repulsion ◽  
Charged Nanoparticles

The presence of negatively charged nanoparticles affects the surface activity of anionic surfactants in an aqueous phase. This effect is mainly caused by the change in ionic strength of the system resulted from the addition of nanoparticles.

Surface properties of the system Al2O3—TiO2 prepared by the hydrolysis of metal alkoxides

1970 ◽  
Vol 32 (3) ◽  
pp. 470-476 ◽  
Author(s):  
Hiroyoshi Murayama ◽  
Koichi Kobayashi ◽  
Masumi Koishi ◽  
Kenjiro Meguro
Keyword(s):  
Surface Properties ◽  
Metal Alkoxides ◽  
Hydrolysis Of Metal Alkoxides ◽  
Hydrolysis Of

Modification of Milk and Whey Surface Properties by Enzymatic Hydrolysis of Milk Phospholipids

2007 ◽  
Vol 55 (8) ◽  
pp. 2970-2978 ◽  
Author(s):  
Hanna M. Lilbæk ◽  
Tine M. Fatum ◽  
Richard Ipsen ◽  
Niels Kristian Sørensen
Keyword(s):  
Enzymatic Hydrolysis ◽  
Surface Properties ◽  
Hydrolysis Of

scholarly journals Interaction of activating protein and surfactants with human liver hexosaminidase A and GM2 ganglioside

1980 ◽  
Vol 185 (3) ◽  
pp. 583-591 ◽  
Author(s):  
Peter Hechtman ◽  
Zarin Kachra
Keyword(s):  
Human Liver ◽  
Anionic Surfactants ◽  
Sodium Taurocholate ◽  
Ionic Surfactants ◽  
Enzymic Hydrolysis ◽  
Gm2 Ganglioside ◽  
Activator Protein ◽  
Hexosaminidase A ◽  
Triton X ◽  
Hydrolysis Of

The effects of surfactants on the human liver hexosaminidase A-catalysed hydrolysis of Gm2 ganglioside were assessed. Some non-ionic surfactants, including Triton X-100 and Cutscum, and some anionic surfactants, including sodium taurocholate, sodium dodecyl sulphate, phosphatidylinositol and N-dodecylsarcosinate, were able to replace the hexosaminidase A-activator protein [Hechtman (1977) Can. J. Biochem.55, 315–324; Hechtman & Leblanc (1977) Biochem. J.167, 693–701) and also stimulated the enzymic hydrolysis of substrate in the presence of saturating concentrations of activator. Other non-ionic surfactants, such as Tween 80, Brij 35 and Nonidet P40, and anionic surfactants, such as phosphatidylethanolamine, did not enhance enzymic hydrolysis of Gm2 ganglioside and inhibited hydrolysis in the presence of activator. The concentration of surfactants at which micelles form was determined by measurements of the minimum surface-tension values of reaction mixtures containing a series of concentrations of surfactant. In the case of Triton X-100, Cutscum, sodium taurocholate, N-dodecylsarcosinate and other surfactants the concentration range at which stimulation of enzymic activity occurs correlates well with the critical micellar concentration. None of the surfactants tested affected the rate of hexosaminidase A-catalysed hydrolysis of 4-methylumbelliferyl N-acetyl-β-d-glucopyranoside. Both activator and surfactants that stimulate hydrolysis of Gm2 ganglioside decrease the Km for Gm2 ganglioside. Inhibitory surfactants are competitive with the activator protein. Evidence for a direct interaction between surfactants and Gm2 ganglioside was obtained by comparing gel-filtration profiles of 3H-labelled GM2 ganglioside in the presence and absence of surfactants. The results are discussed in terms of a model wherein a mixed micelle of surfactant or activator and GM2 ganglioside is the preferred substrate for enzymic hydrolysis.

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