Some of the older pigments are lead-based and difficult to acquire because of EU health-and-safety regulations.
He notes that impressionists used pigments in oil, which was a new medium at the time.
Trichromatic vision involves three pigments, called opsins, that are sensitive to different wavelengths of light.
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He also said some of the victims were found to have carbon pigments or water in their lungs.
If these carry different forms of the gene, a female's eyes will be equipped with all three pigments.
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And the only way you're going to get that range of hues is by having a combination of pigments.
Industrial customers for its plastics, paints and pigments were shrinking or going bust.
Anthocyanins are plant pigments which colour red, purple and blue fruits and flowers.
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Yet even the great Venetian colourists were prey to pigments' tricks: vermilion reds that blacken and ultramarine skies that fade.
Glaze is mostly translucent, but da Vinci would also slip in small amounts of pigments, such as manganese and lead oxides.
The polyurethanes, performance products, advanced materials and textile effects segments manufacture and supply organic chemicals, while the pigments segment produces inorganic chemicals.
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Where these signals intersect, the production of red anthocyanin pigments is induced.
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Kanayama Akira used an automatic toy car in lieu of a paintbrush, and Yoshihara Michio made paintings by riding his bicycle through the pigments.
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Besides absorbing light, the pigments can neutralise free radicals directly, help cells to hold on to their water, and even act as an antifreeze.
Even if his synthetic pigments were never detected by scientific testing, the paint would start to peel in a few decades, betraying his ruse.
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The CWC would affect U.S. firms that make dyes and pigments, insecticides, pharmaceuticals, ceramics, nylon, paint and varnish, electronics, textiles, and soap and detergent.
But the reason for youthful blushing which, like the ruddiness of old age, is due to the presence of anthocyanin pigments need not be the same.
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Egg Tempera, which uses egg yolk to bind pigments, dates back to Egyptian times but became largely obsolete after oil paints appeared in the Renaissance.
Though Hoechst, once the local chemical giant, was absorbed into sanofi-aventis of France in 1999, its Frankfurt site still churns out polymers, pigments and pharmaceuticals.
Medievalising pre-Raphaelites and back-to-nature Impressionists seized alike on these manufactured pigments.
When he had first taken up his trade, he had carried his brushes and pigments on his back, and walked the forest trails like a peddler.
Shekede said she and colleague Stephen Rickerby were surprised to discover paintings of remarkable "sophistication" -- with walls decorated with gold leaf, precious pigments and organic glazes.
They deployed more fancy pigments than had been used before, more than would ever be used again in ancient Mexico, some 47 vibrant blues, reds and yellows.
Leather bookbindings, pigments for paints and majolica (white-glazed pottery) all came from the East, although the Venetians never succeeded in imitating the perfect ruby glaze of Iznik pottery.
The latest paints, with so-called fractured pigments, allow the plant leaves to breathe normally and also keep them warmer, thereby helping the turf green up faster in the spring.
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For 2, 000 years prior, China's villages had experienced remarkable continuity: Their wooden buildings were maintained by master artisans who had intimate knowledge of carpentry, lacquer, paint pigments, resins and textiles.
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Lascaux II is an exact copy, painstakingly re-created using the same painting techniques as in the originals: pigments mixed in the mouth and blown onto the walls through marrow bones.
"The animals are actually developing color on the skin and they're doing it without pigments, and they potentially have the chance to be picking a certain color, " Wardill said.
Though, apart from the exposed brick, mortar and pestle used to grind pigments, and an easel with Cole's doodles etched into it, much of the contents aren't original to the studio.
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