Crystals and gemstones can be more than just beautiful—they can be deadly. Minerals like arsenopyrite, cinnabar, galena, and ...

As a result, researchers presume Rembrandt used arsenic sulfide pigments realgar [red] and orpiment [yellow]. The research is ...

Methods used for extracting and purifying the pigments and their value in classifying the various types of algae are discussed in detail. This book contains detailed tables of the physical properties ...

Hyperpigmentation is a common, often harmless skin condition caused by an increase in melanin, the substance in your body that's responsible for pigment. This condition makes certain areas of ...

Pigments are insoluble colorants which are not physically or chemically affected in an incorporated substrate. Pigments, especially those which occur in nature, have been used as colorants for ...

Carreto, Jose I. and Carignan, Mario O. 2011. Mycosporine-Like Amino Acids: Relevant Secondary Metabolites. Chemical and Ecological Aspects. Marine Drugs, Vol. 9 ...

We are going to use chromatography to separate these different food colourings into the coloured pigments they are made from. Start by putting chromatography paper down on a clean flat surface.

The chemicals that make up the color are called pigments. Some pigments attach to water better than others so they move further through the paper before sticking. The size, weight, and shape of the ...

How can the soft bodies of coleoid cephalopods so aptly hide in their environment? Why must they? What cells and specialized organs make such crypsis possible for one of the older evolutionary ...

Mission Statement: Evidence-based Complementary and Alternative Medicine (eCAM) is an international, peer-reviewed journal that seeks to understand the sources and to encourage rigorous research ...