Gases. Gas 4467 . Vapours . The vapor state of matter; nonelastic fluids in which the molecules are in free movement and their mean positions far apart. Gases tend to expand indefinitely, to diffuse and mix readily with other gases, to have definite relations of volume, temperature, and pressure, and to condense or liquefy at low temperatures or under sufficient pressure. (Grant & Hackh's Chemical Dictionary, 5th ed) . 1.00
Gastrins. Gastrin . A family of gastrointestinal peptide hormones that excite the secretion of GASTRIC JUICE. They may also occur in the central nervous system where they are presumed to be neurotransmitters. . 0.69
Noble Gases. Group 18 Elements . Elements, Group 18 . Gases, Noble . Inert Gases . Gases, Inert . Rare Gases . Gases, Rare . Elements that constitute group 18 (formerly the zero group) of the periodic table. They are gases that generally do not react chemically. . 0.66
Toxic Gases. Gaseous substance which, by inhalation, produces different effects and consequences on health of human beings. (Free translation from the original: Material IV - Glosario de Protección Civil, OPS, 1992) . 0.65
