نتایج جستجو برای: micellar media
تعداد نتایج: 284297 فیلتر نتایج به سال:
Micellar photocatalysis allows for a simple and benign reaction set-up using water as the solvent without need oxygen-removing protocols. Blue light (456 nm) is absorbed by photocatalyst [2+2] photocycloaddition to occur between α,β-unsaturated carbonyl compounds activated alkenes. The observed reactivity aldehydes completely turned on use of micellar solution opposed organic solvents. More inf...
Enzymatic activity in the presence of surfactants commonly used in dissolution media, Part 1: Pepsin
The United States Pharmacopeia (USP) General Chapters Dissolution 〈711〉 and Disintegration and Dissolution of Dietary Supplements 〈2040〉 allows the use of enzymes in dissolution media when gelatin capsules do not conform to dissolution specifications due to cross linking. Possible interactions between enzymes and surfactants when used together in dissolution media could result in loss of the en...
Flavonoids belong to a large group of natural polyphenol compounds and have a broad spectrum of pharmacological activities. Many natural flavonoids are characterized by extremely low solubility in aqueous media and body fluids. To improve the solubility of drugs, various methods were developed and are used in pharmaceutics: solubilization, preparation of solid disperse systems with soluble and ...
this work aimed to prepare a nanoemulsion preparation containing budesonide and assess its aerodynamic behavior in comparison with suspension of budesonide. in-vitro aerodynamic performance of the corresponding micellar solution (ie. nanoemulsion preparation without oil) was investigated too. nanoemulsions of almond oil containing budesonide, as a hydrophobic model drug molecule, were prepared ...
This article refers to:Formation of Lyotropic Micellar Nematic Phase in Binary Mixture Liquid Crystals
The effect of addition of sodium anthranilate to 5 mM micellar solutions of gemini surfactant 1,4-bis(N-hexadecyl-N,N-dimethylammonium)butane dibromide is investigated by 1H NMR. The solubilization site of anthranilate anion near the micellar surface is inferred. In the micelles, the An- ions intercalate among the surfactant headgroups producing morphological changes.
This work aimed to prepare a nanoemulsion preparation containing budesonide and assess its aerodynamic behavior in comparison with suspension of budesonide. In-vitro aerodynamic performance of the corresponding micellar solution (ie. nanoemulsion preparation without oil) was investigated too. Nanoemulsions of almond oil containing budesonide, as a hydrophobic model drug molecule, were prepared ...
Water induced microstructure transitions of diglycerol monolaurate (C(12)G(2)) reverse micelles in aromatic liquid ethylbenzene have been investigated using small-angle X-ray scattering (SAXS) and rheometry. The SAXS data have been evaluated by generalized indirect Fourier transformation (GIFT) and geometrical model fittings. We found that the C(12)G(2) spontaneously self-assembles into ellipso...
The effect of tetraalkylammonium chlorides (TCnAC for n ) 1, 2, 3, and 4) on the micellar stability of sodium dodecyl sulfate (SDS) solutions was investigated and related to dynamic interfacial properties, such as foamability and foam stability as well as surface viscosity and surface tension. The slow relaxation time τ2, which is directly related to the micellar stability, was determined using...
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