At present days drugs are formulated by using different novel drug delivery system (NDDS) which are used for targeting drugs to different organ systems and for controlled /sustained release of drug from the dosage forms. The NDDS can be used to overcome many disadvantages of conventional dosage forms like poor bioavailability, first pass effect, systemic toxicity, degradation of drug in stomach...

A simple method was developed for the reversible and selective modification of metallic and large diameter semiconducting SWCNTs in [BMIM]PF(6) ionic liquids by adding certain anion surfactants. The electronic band structure of SWCNTs can be controlled and tuned over a range by varying the surfactants used and their concentrations. A charge transfer "cation- product operator" complex model was ...

A straightforward flow injection method for the tensammetric determination of surfactants is described. The flow-through cell is equipped with a mercury-coated gold electrode as the working electrode. Ionic as well as nonionic surfactants can be determined in the concentration range 10~5-104 M. The calibration graph is not linear but with an approximation by a polynomial or a cubic spline funct...

[structure: see text] A hybrid foldamer constructed from six cholate units and two methionines was labeled with a DANSYL (DNS) group. The foldamer was solubilized by surfactant micelles to allow its usage as a fluorescent sensor for mercury ions present in the micromolar range in aqueous solutions. Its sensitivity was largely independent of the concentration of nonionic surfactants but was stro...

The MOFs selected in this work are NH2-MIL-53(Al), MIL-100(Fe) and UiO-66 type (Zr-BDC NH2-Zr-BDC). We have tried to assist the sustainable synthesis of MOFs, at room temperature water as a solvent, with presence non-ionic surfactants: Pluronic F127 P123. parent prepared solvent commonly grow form agglomerates small crystallites all cases. X ray diffraction patterns surfactant templated NH2-MIL...

The association of many classes of surface-active molecules into micellar aggregates is a well-known phenomenon. Micelles are in dynamic equilibrium, constantly disintegrating and reforming. This relaxation process is characterized by the slow micellar relaxation time constant, tau(2), which is directly related to the micellar stability. Theories of the kinetics of micelle formation and disinte...

Microemulsions (μe) with water and a hydrophobic ionic liquid (IL) usually require 45-60 wt% surfactant to solubilize equal amounts of water and IL. To increase the efficiency we designed a new class of surfactants by combining a hydrophilic but IL-ophobic carbohydrate-based part with a hydrophobic but IL-ophilic IL-based part. These surfactants allow formulating microemulsions with 20 wt% surf...

A novel cellular cytotoxicity assay using two fluorescent dyes was developed as an alternative method to the standard direct count of viable protozoa under light microscopy. The compound calcein AM is a non-fluorescent substance that diffuses passively across intact cell membranes and is converted by intracellular esterases to the green fluorescent calcein, which is retained in viable cells. Th...

13 14 Surfactants have one of the highest production rates of all organic chemicals. Non-ionic 15 surfactants, especially alkylphenol ethoxylates, received most attention as precursors of 16 estrogenic metabolic products generated during wastewater treatment. Alkylphenols (octyl 17 and nonylphenol), alkylphenol polyethoxylates (APEOs), and alcohol ethoxylates (AEOs) 18 have been determined in a...

Abstract In this paper we present the results of experimental investigation effect ionic surfactants (sodium dodecyl sulfate and cetrimonium bromide) at various concentrations on vertical film flow in range Reynolds numbers 10 < Re 50. The laser-induced fluorescence technique was used for instant thickness measurements. are compared with data obtained non-ionic Triton X-100. For all rivulets...