a novel potentiometric ion-selective pvc membrane sensor for analysis of atorvastatin (at) in pharmaceutical preparations based on atorvastatin-(tetraphenyl borate), (at-(tpb)2) as sensing element, tetraphenyl borate as additive and tris-2-ethyl-hexyl phosphate (top) as plasticizer solvent was prepared. the electrode shows a good nernestian response over the concentration range of 0.09–5586 µg ...

We herein describe a palladium-catalyzed formal aromaticity transfer coupling reaction between phenols and pyrrolidines or indolines to generate the corresponding N-cyclohexyl pyrroles or indoles. In this transformation, the aromaticity of phenols is formally passed on to the pyrrolidine or indoline units. Substituted phenols thus can serve as latent cyclohexyl equivalents for the fast construc...

F r a n z D a l l a c k e r * , G e r m a n u s R e i c h r a t h u n d G e r a r d S c h n a c k e r s Institut für Organische Chemie der Technischen Hochschule Aachen, Prof.-Pirlet-Straße 1, D-5100 Aachen Z. Naturforsch. 34b, 624-632 (1979); eingegangen am 13. November 1978 5,6-Dimethyl-l,3-benzodioxole-4,7-quinone, 6,7-Dimethyl-l,4-benzodioxan-5,8-quinone, 7,8 -Dimethyl 3,4 -dihy dro 2 H -1,...

A method was developed to determine nine environmental phenols, including bisphenol A, 2,3,4-trichlorophenol, 2,4,5-trichlorophenol, pentachlorophenol, triclosan (2,4,4'-trichloro-2'-hydroxyphenylether), 4-tert-octylphenol, 4-n-octylphenol, 4-n-nolyphenol and benzophenone-3 (2-hydroxy-4-methoxybenzophenone) in human urine using ultra-high-performance liquid chromatography-tandem mass spectromet...

The reaction of phenols with 7a led to the synthesis of aurones, while the reaction of phenols with 7b led to the synthesis of flavones.

Dissolved lignin phenols and optical properties of dissolved organic matter (DOM) were measured to investigate the sources and transformations of terrigenous DOM (tDOM) in Otsuchi Bay, Japan. Three rivers discharge into the bay, and relatively high values of syringyl:vanillyl phenols (0.73 ± 0.07) and cinnamyl:vanillyl phenols (0.33 ± 0.10) indicated large contributions of non-woody angiosperm ...

Oatmeal has been used for centuries as a soothing agent to relieve itch and irritation associated with various xerotic dermatoses. In 1945, a ready to use colloidal oatmeal, produced by finely grinding the oat and boiling it to extract the colloidal material, became available. Today, colloidal oatmeal is available in various dosage forms from powders for the bath to shampoos, shaving gels, and ...

BACKGROUND Maternal urinary biomarkers are often used to assess fetal exposure to phenols and their precursors. Their effectiveness as a measure of exposure in epidemiological studies depends on their variability during pregnancy and their ability to accurately predict fetal exposure. OBJECTIVES We assessed the relationship between urinary and amniotic fluid concentrations of nine environment...

Nitration of phenol and various 4-substituted phenols with Cu(NO3)2.3H2O, Cu(NO3)2.3H2O/SiO2, 9H2O and Cr(NO3)2. 9H2O in different anhydrous organic solvents are investigated. High selectivity ratio of para vs ortho isomers has been observed. Mono- and dinitro compounds f...