Nail polish can be harsh on skin and nails. Acetone can also remove artificial nails made of acrylic or cured gel. A less harsh nail polish remover is ethyl acetate, which often also contains isopropyl alcohol. Ethyl acetate is usually the original solvent for nail polish itself. Acetonitrile has been used as a nail polish remover, but it is more toxic and potentially more carcinogenic than the aforementioned options. It has been banned in the European Economic Area for use in cosmetics since 17 March 2000. The health risks associated with nail polish are disputed. According to the U.S. Department of Health
Science of smells smells left by a criminal on a crime scene can be stocked in glassy jars for identification for purposes. The dog's olfaction, as criminalistics technology, developed thanks to works of a Hungarian doctor in 1970s in countries of Eastern Europe during Cold War, notably to identify dissidents. Science of smells The odorology or science of smells is a technology used mainly in criminology for judicial identification. The technology is based on the analysis of smells by dogs notably to merge the criminals or to identify the smell of objects (explosives, drugs). Olfaction of dogs is used for a long time