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Article
A comprehensive kinetic, thermodynamic and photochemical study of some spiro-indoline-oxazines
The thermoreversible photochromic reaction of spiro-indoline-oxazines to photo-merocyanines has been studied by stationary spectrophotometric techniques. Two methods are described for determining the molar abs...
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Article
Mechanical surface characterization: A promising procedure to screen organic coatings
Two ductile coating ma-terials were subjected to a combined indentation and scratch test procedure de-signed to screen a predetermined pattern of many small sample surfaces in a limited time. The screening of ...
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Article
Acidichromism and Ionochromism of Luteolin and Apigenin, the Main Components of the Naturally Occurring Yellow Weld: A Spectrophotometric and Fluorimetric Study
Luteolin and apigenin, extracted from Reseda luteola L., were spectrophotometrically and fluorimetrically studied. The spectra were investigated as a function of pH in methanol/water solutions (1/2, v/v) in the 2...
