SiO 2 /Bi WO 6 photocatalyst with Si/Bi/W=1:2:1 molar ratio was obtained by the sol-gel method from bismuth nitrate, sodium tungstate and biogenic silica rice husk biomass followed calcination. Bi used as a control sample. FT-IR, SEM, XRD, EDXRF, UV-Vis methods were to systematically characterize as-obtained materials. Photodegradation of Indigo Carmine in exposure UV, sunlight xenon light stud...

A simple yet effective strategy for synthesis of 5-aryl-8-quinolinolate-based electroluminophores with tunable emission wavelengths is presented. Two different pathways for the attachment of electron-donating or electron-withdrawing aryl groups to the 5-position of the quinolinolate ligand via Suzuki coupling were developed. A successful tuning in the emission color was achieved: the emission w...

Debate exists about the time course of the effect of colour categories on visual processing. We investigated the effect of colour categories for two groups who differed in whether they categorised a blue-green boundary colour as the same- or different-category to a reliably-named blue colour and a reliably-named green colour. Colour differences were equated in just-noticeable differences to be ...

[This corrects the article on p. 469 in vol. 57.].

A though healthcare is undergoing a profound transformation, certain attitudes related to it seem set in stone. One is the lingering belief of some hospital and health network administrators that the only acceptable physician candidates are male, U.S. trained, under 45 , blond haired, and blue eyed. Client insistence on exclusionary candidate parameters is a challenge physician recruiters deal ...

The neutral organic dye indigo forms an inorganic-organic hybrid material with nanoclays (see picture; blue circles on disks symbolizing indigo, spheres indicating liberated cations) and can thus be transferred into aqueous solution. Solids recovered from these solutions resemble the ancient Maya Blue pigment. The method can also be applied to other hydrophobic species and may open the gate for...