High performance liquid chromatography (HPLC) is the preferred analytical technique for the separation and identification of surfactants in consumer products. Although many HPLC columns are available for surfactant analysis, none of these columns provide optimal selectivity for the analysis of anionic, nonionic, cationic, and amphoteric surfactants. This article describes an HPLC column, Acclai...

A series of hydrocarbon and fluorocarbon carbohydrate surfactants with different headgroups (i.e., gluco-, galacto- and maltopyranoside) and (fluorinated) alkyl tails (i.e., C7 and C14 to C19) was synthesized to investigate trends in their cytotoxicity and haemolytic activity, and how surfactant-lipid interactions of selected surfactants contribute to these two measures of biocompatibility. All...

Surface tension (ST) measurements were carried out on various binary mixtures of the "normal" surfactants, such as nonionic surfactant, hexaethylene glycol mono-n-dodecyl ether(C12EO6), and cationic surfactant, tetradecyltrimethylammonium bromide (TTAB), and polymeric copolymer, Pluronic F127, F127(PPO)-g-PVP, and F127(PEO)-g-PVP. In all cases mixed micellar aggregates were formed and critical ...

We synthesized polythiophene (PTh) films on stainless steel electrodes using chronoamperometry in boron trifluoride diethyl etherate (BFEE) electrolyte with anionic surfactants. The presence of the anionic surfactants in BFEE reduced the oxidation potential of thiophene and increased the oxidation current during electropolymerization. The measured in-plane electrical conductivity of PTh films s...

Addition of sugar surfactants, sucrose fatty acid esters and alkylpolyglucosides to a calcium phosphate cement, designed for bone reconstruction, is described. Thanks to their adsorption at the surface of the calcium phosphate particles, the sugar surfactants allowed a full injectability and brought a very good workability. Injectability was measured by monitoring force-distance curves. With so...

Abstract This work focuses on the improvement of electrospinnability low-sulfonate lignin (LSL)/polyvinylpyrrolidone (PVP) solutions by addition surfactants (SDS, CTAB and Tween-20) as well ability resulting nanofibers to structure castor oil. Solutions with two LSL/PVP weight ratios (70:30 90:10) in DMF were prepared adding variable surfactant concentrations (0–1 wt.%), physicochemically chara...

Respiratory distress syndrome (RDS) is the most common cause of respiratory insufficiency in preterm infants, especially those born at <30 weeks of gestation. Continuous positive airway pressure has been used since the 1970s as a primary mode of treatment for RDS. Surfactant therapy became available in the 1980s and has become the standard care for infants with or at risk for RDS. Surfactant th...

This paper describes a revision of the Hill-type muscle model so that it will describe the chemo-mechanical energy conversion process (energetic) and the internal-element stiffness variation (viscoelastic) during a skeletal muscle isometric force twitch contraction. The derivation of this energetic-viscoelastic model is described by a first-order linear ordinary differential equation with const...

Gemini surfactant is the family of surfactant molecules possessing more than one hydrophobic tail and hydrophilic head group. These surfactants usually have better surface-active properties than corresponding conventional surfactants of equal chain length. Geminis are used as promising surfactants in industrial detergency and have shown efficiency in skin care, antibacterial property, metal-enc...

Twenty-two ionic and nonionic surface-active agents were applied to a standardized pea root meristem test system. Mitosis was inhibited by 16 surfactants at concentrations of 0.1% v/v. Two surfactants caused a slight depression in the mitotic index; the remaining four had no recognizable effect. Several compounds were irreversibly toxic at levels of 0.1% v/v. Five of the six known biodegradable...