Attention is activated when one or more sensory receptors return a sensation to the brain for the processing of information received. If we focus on the stimuli affecting attention, we have to consider some visual characteristic reinforcing or not the stimulus itself, such as size, intensity, colour, movement, position and contrast. All we know the attractive power of colours, and many studies ...

We report the fabrication of heterostructure white light-emitting diode (LED) comprised of n-ZnO nanotubes (NTs) aqueous chemically synthesized on p-GaN substrate. Room temperature electroluminescence (EL) of the LED demonstrates strong broadband white emission spectrum consisting of predominating peak centred at 560 nm and relatively weak violet-blue emission peak at 450 nm under forward bias....

Mutants of Crithidia fasciculata, resistant to Actinomycin D, Tubercidin, Crystal Violet, 6-Azauridine, and 5-Fluorouracil were obtained and characterized. The mutants were stable when maintained under nonselective conditions, and could be grouped in several subclasses on the basis of cross-resistance to other drugs. Actinomycin D- and Crystal Violet-resistant mutants appeared spontaneously whe...

Until very recently, the role of ultra-violet (UV) colour perception in vertebrate and invertebrate vision has largely been ignored. However, in the past few years, a host of detailed information has become available on the widespread distribution of UV receptors in different species - from insects to mammals - and the important functions they seem to play in navigation, foraging, intraspecies ...

Figure 3. (A) Detail of axial slice of volumetric image for pt 2 showing putamen defined by FIRST. (B) Comparable slice in MD map of same subject. (C) Mask of putamen registered onto MD map. Colour scale: red: 5% partial volume; yellow: 100% Figure 2. Mean diffusivity values [×10 mm.s]. Control subjects: mean ( ) ± SD. Range: red bar. Patients: CJD green symbols. Spastic dystoniablack symbols. ...

A study to establish relationship between the petal colour, extraction solvent, phenolic, flavonoid, anthocyanin content and antioxidant activity in three varieties of Viola × wittrockiana (yellow, red and violet) is reported in this article. Identification and quantification of flavonoids and anthocyanins using HPLC-DAD-ESI-MS is also presented. The antioxidant activity was studied by four dif...

The formation of blue coloured ferric anthocyanin chelates and their colour stability during storage and thermal treatment were monitored in a pH range relevant to food (3.6-5.0). Liquid model systems were composed of different types of Citrus pectins, juices (J) and the respective phenolic extracts (E) from elderberry (EB), black currant (BC), red cabbage (RC) and purple carrot (PC) in the pre...

This study investigates the rapidity with which an optical dye in a solid plastic host irreversibly degrades when it is brightly illuminated by visible light. Specifically, the organic dye cresyl violet perchlorate dispersed in plexiglas was optically excited by a continuous-wave dye laser pumped by an argon-ion laser. After resonantly absorbing and emitting many times, an individual dye molecu...

The adsorption behaviour of Methyl violet and Auramine yellow from aqueous solution onto Stishovite clay was investigated as a function of parameters such as initial dye concentration, contact time, p and temperature. The Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms. Adsorption followed pseudo-second order model. The experimental data fitted well ...