In the present work, we propose a simplified spectrophotometric method for determining anionic surfactants, based on the formation of the ionic pair anionic surfactant-methylene blue (AS-MB). This method, in relation to the conventional analytic procedure, considerably reduces not only the quantity of chloroform used in extracting the ionic pair formed, but also the time and the quantity of sam...

This paper overviews solution additives that affect protein stability and aggregation during refolding, heating, and freezing processes. Solution additives are mainly grouped into two classes, i.e., protein denaturants and stabilizers. The former includes guanidine, urea, strong ionic detergents, and certain chaotropic salts; the latter includes certain amino acids, sugars, polyhydric alcohols,...

On admixture of non-ionic surfactant of the alkyl or dialkyl polyglycerol ether class and cholesterol with subsequent hydration in aqueous media, microscopic lamellar structures formed are known as niosomes or non-ionic surfactant vesicles. Method of preparation of niosome is same as of liposome technology i.e. hydration by aqueous phase of the lipid phase which may be either a pure surfactant ...

Cellulose has been directly converted into environmentally friendly alkyl glycoside surfactants in a one pot transformation. By working in ionic liquid media with Amberlyst 15Dry (A15) as catalyst and coupling the rate of cellulose hydrolysis and the rate of glycosidation of the monosaccharides formed with C(4) to C(8) alcohols, it was possible to obtain 82% mass yield of octyl-alpha,beta-gluco...

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Environmental concerns on contamination of subsurface porous media by toxic chemicals have motivated the petroleum industry to replace them with environmentally sustainable (green) and biodegradable alternatives. Green surfactants emerged such as sugar, enzymatic, microbial based surfactants. However, their emulsification different oils salinity conditions is unknown. In this study, oil brine s...

Glucosides are non-ionic surfactants formed by the condensation of fatty acids with glucose (1). They have cleansing and emulsifying properties, and are used in shampoos and soaps, as well as in leave-on products such as lotions, and sunscreen agents. They are completely biodegradable, making them ecofriendly. Although contact allergies to glucosides have been reported, they are uncommon (2–6)....

The interaction between non-ionic surfactants and cholesterol has been studied by reversed-phase thin-layer chromatography (RP-TLC) using cholesterol impregnated TLC plates and methanol–water mixtures as mobile phases. The RM values obtained were in linear correlation with the methanol concentration of the mobile phase. The intercept obtained from linear regression analysis (RM0), being charact...

lkylphenol ethoxylates are nonA ionic surfactants widely used in many institutional and household cleaning products and industrial processes. They have been popular for their effectiveness, economy and ease of handling and formulating for more than 40 years. They function as emulsifiers, detergents, wetting agents and dispersants. One of the largest application areas for alkylphenol ethoxylates...