We use amplified spontaneous emission (ASE) and linear absorption spectroscopy to study the mechanisms of reversible photodegradation of 1-amino-2-methylanthraquinone (disperse orange 11-DO11) in solid poly(methyl methacrylate). Measurements as a function of intensity, concentration, and time suggest that ASE originates in a state (be it a tautomer or a vibronic level) that can form a dimer or ...

Attempts were made to modify polypropylene fibers by melt blending with polyethylene terephthalate in order to enhance the dyeability of the resultant fiber. Five blends of polypropylene/polyethylene terephthalate/compatibilizer were prepared and subsequently spun into fibers. Three disperse dyes were used to dye such modified fibers at boiling and 130 °C. The dyeing performance of the blend fi...

Abstract Disperse Orange 1, colour index 11080, is an azo dye. Collectively, dyes are a common cause of textile-related allergic contact dermatitis (ACD). A 2006 European Union (EU) directive restricts the sale any articles or dyed items that have direct and prolonged with skin oral cavity contain more than 30-ppm dyes. These include wide range such clothing, bedding, furniture, toys yarn. Desp...

Here we present a surfactant molecule (1) containing an ammonium headgroup, in which a bis-ureido group is incorporated in its hydrocarbon chain. Due to strong hydrogen bonding interactions, 1 forms well-defined highly ordered ribbon-like aggregates in water. Moreover, we demonstrate that these ribbons can be functionalized via a modular approach through molecular recognition of other bis-urea ...

of an adult wild-type mouse that received a homotopic graft of subventricular zone cells from a GFP /TrkB / mouse and was killed 15 d later. Graft-derived neurons (green) migrate to the olfactory bulb, disperse radially into several olfactory bulb layers (granular layer shown in picture; red, DAPI nuclear dye), and extend dendrites even in the absence of the neurotrophin receptor TrkB. For more...