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chemeurope.com's Encyclopedia of Chemistry provides articles for 64,557 entries from chemistry, pharmaceutics and material sciences as well as related scientific disciplines.

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Atomic line filter

Atomic line filter Faraday filter designed, built and photographed by Jonas Hedin for making daytime LIDAR measurements at Arecibo Observatory. An atomic line filter (ALF) is an advanced optical band-pass filter used in the physical science s for filtering electromagnetic radiation with precisi more

Technetium

Technetium |- | Electron affinity || -53 kJ/mol Technetium () is the lightest chemical element with no stable isotope . It has atomic number 43 and is given the symbol Tc. The chemical properties of this silvery grey, crystalline transition metal are inte more

Raney nickel

Raney nickel Raney nickel () is a solid catalyst composed of fine grains of a nickel -aluminium alloy , used in many industrial processes. It was developed in 1926 by American engineer Murray Raney Raney, Murray (1927). "Method of producing Finely Divided Nickel ". US Patent 1628190, issued 19 more

Coeliac disease

Coeliac disease Coeliac disease, also spelled celiac disease, is an autoimmune disorder of the small bowel that occurs in genetically predisposed people of all ages from middle infancy. Symptoms include chronic diarrhoea , failure to thrive (in children) and fatigue , but these may be absent a more

Verbascum thapsus

Verbascum thapsus Verbascum thapsus (; Great Mullein or Common Mullein) is a species of mullein native to Europe , northern Africa and Asia , and introduced in the Americas and Australia . It is a hairy biennial plant that can grow to 2 m or more tall. Its small yellow flowers are dens more

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