In the title compound, C(19)H(19)NO(2), commonly called koenimbine, the pyran ring adopts a sofa conformation. The carbazole ring system is planar [r.m.s. deviation = 0.063 (1) Å]. A C(10) zigzag chain running along the b axis is formed through inter-molecular C-H⋯O hydrogen bonds. The chains are linked via weak C-H⋯π and N-H⋯π inter-actions.

OBJECTIVE The aim of this study was to evaluate the effects of staining solutions on the color stability and roughness of different provisional resin material. MATERIAL AND METHODS Three different materials were tested (two polymethylmethacrylate and one bis-acryl composite resins) in cola and coffee and for 1 and 4 weeks. 240 specimens were used - half of them polished and other half not. Co...

To 1.0 cc. of a solution containing 1 to 50 y of a ketohexose, either in free form or in the form of its esters or polymers, or 2 y of triose or glycolic aldehyde, is added 0.2 cc. of a 1.50 per cent solution of cysteine hydrochloride. To this 6 cc. of a mixture of 190 cc. of water and 450 cc. of concentrated sulfuric acid, c.p., are added and immediately afterwards 0.2 cc. of a 0.12 per cent a...

A conjugated oligomer containing central bi-ethylenedioxythiophene (BEDOT) unit and two terminal anil-substituted carbazole units has been successfully synthesized and characterized by cyclic voltammetry and spectroelectrochemical methods (UV-vis-NIR and Raman). It shows two oxidation waves at -0.01 V and +0.24V (vs Fc/Fc+), which can be ascribed to two ha l-0 03 44 66 4, v er si on 1 30 M ar 2...

Macrophages and their fused products are commonly found at the polymethylmethacrylate cementbone interface, but it is not known if they confribute directly to the osteolysis associated with loosening of the cemented prosthesis. We isolated mononuclear phagocytes from granulomas formed by subcutaneous implantation of polymethylmethacrylate into mice and incubated them on bone slices in which the...

We used a goat model of a contaminated musculoskeletal defect to determine the effectiveness of rapidly-resorbing calcium-sulphate pellets containing amikacin to reduce the local bacterial count. Our findings showed that this treatment eradicated the bacteria quickly, performed as well as standard polymethylmethacrylate mixed with an antibiotic and had many advantages over the latter. The pelle...

Photo-induced anisotropy measurements were carried out in thin films of azopolymers PEPC with Solvent Yellow 3, the concentrations 10 wt% and 30 polymers azo groups their side-chain. The experimental dependences azimuths probe beam at pump angles for samples studied. photoinduced dependence sample birefringence incident polarization angle was by polarimetric method studied samples. geometric ph...