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Dissimilatory nitrate reduction to ammonium (DNRA), also known as nitrate/nitrite ammonification, is the result of anaerobic respiration by chemoorganoheterotrophic microbes using nitrate (NO 3−) as an electron acceptor for respiration. [1][2] In anaerobic conditions microbes which undertake DNRA oxidise organic matter and use nitrate (rather ...
Infobox references. Ammonium is a modified form of ammonia that has an extra hydrogen atom. It is a positively charged (cationic) molecular ion with the chemical formula NH+ 4 or [NH4]+. It is formed by the addition of a proton (a hydrogen nucleus) to ammonia (NH3).
AAW An acronym for anti-aircraft warfare. aback (of a sail) Filled by the wind on the opposite side to the one normally used to move the vessel forward.On a square-rigged ship, any of the square sails can be braced round to be aback, the purpose of which may be to reduce speed (such as when a ship-of-the-line is keeping station with others), to heave to, or to assist moving the ship's head ...
The Society of the Divine Word (SVD) reports on its world-wide missionary activities. - Divine Word Missionaries: One Hundred Years in North America 1895-1995, Steyler Verlag, Nettetal 1994, 239 pp., ISBN 3-8050-0345-5. Steyler Missionswissenschaftliches Institut (ed.), Divine Word Missionaries in Papua New Guinea, 1896-1996, Festschrift.
Ammonia was first detected in interstellar space in 1968, based on microwave emissions from the direction of the galactic core. [172] This was the first polyatomic molecule to be so detected. The sensitivity of the molecule to a broad range of excitations and the ease with which it can be observed in a number of regions has made ammonia one of ...
One Direction was formed in 2010 but went on indefinite hiatus in 2016. Harry Styles, Niall Horan, Liam Payne, Louis Tomlinson, and Zayn Malik all have solo careers now. Malik, Payne, and ...
Glossary of nautical terms (M–Z) () This glossary of nautical terms is an alphabetical listing of terms and expressions connected with ships, shipping, seamanship and navigation on water (mostly though not necessarily on the sea). Some remain current, while many date from the 17th to 19th centuries. The word nautical derives from the Latin ...
Boustrophedon (/ ˌbuːstrəˈfiːdən / [1]) is a style of writing in which alternate lines of writing are reversed, with letters also written in reverse, mirror-style. This is in contrast to modern European languages, where lines always begin on the same side, usually the left. The original term comes from Ancient Greek ...