Self-photosensitized oxidative transformation of Rhodamine B under visible light irradiation in aqueous TiO2 dispersions

Article Abstract:

A study was conducted to analyze the inverse photosensitized oxidative transformation of tetraethylated rhodamine under visible illumination of aqueous titania dispersions. The TiO2 dispersion was prepared by adding TiO2 powder to a solution supporting rhodamine B at specific concentrations. Results indicated that the predomination of deethylation during the initial irradiation period. Findings also showed that increases in anionic surfactants correlated with increases in OH radicals.

Oxidation-reduction reaction, Oxidation-reduction reactions, Semiconductors, Surface active agents, Radicals (Chemistry), Titanium

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Use of microcoil probehead for determination of the structure of oriented silk fibers by solid-state NMR

Article Abstract:

A microcoil probehead for solid-state NMR was developed with a two-channel radio-frequency circuit, and (super 13)C observation with a proton-decouping probehead was performed to obtain information on the distribution of the orientation of silk fibroin molecules in the fiber. It was concluded that even a microgram sample of silk fiber can be observed with a 400 Mhz NMR spectrometer with a microcoil NMR probehead.

Science & research, Animal specialties, not elsewhere classified, All Other Animal Production, Silk, Spectra, Nuclear magnetic resonance, Carbon compounds

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