- ansa compound
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Any cyclophane in which the para positions of a benzene ring are connected by a bridge of at least 10 atoms.
Wikipedia foundation.
Wikipedia foundation.
Muscle — is the tissue of the body which primarily functions as a source of power. There are three types of muscle in the body. Muscle which is responsible for moving extremities and external areas of the body is called "skeletal muscle." Heart… … Medical dictionary
Metallocene — General chemical structure of a Metallocene compound, where M is a metal cation A metallocene is a compound typically consisting of two cyclopentadienyl anions (Cp, which is C5H5 ) bound to a metal center (M) in the oxidation state II, with the… … Wikipedia
Nucleus — 1) In cell biology, the structure that houses the chromosomes. 2) In neuroanatomy, a group of nerve cells. * * * 1. In cytology, typically a rounded or oval mass of protoplasm within the cytoplasm of a plant or animal cell; it is surrounded by a… … Medical dictionary
Timeline of the 2008 South Ossetia war — The 2008 South Ossetia war started on August 7, 2008 and involves Georgia, Russian Federation, South Ossetia and Abkhazia.Military conflict TimelineThe tensions have been escalating through the year of 2008, but the countdown to the open… … Wikipedia
National Museum of Iraq — The Assyrian Hall at the National Museum of Iraq. Established 1926 Location Baghdad, Iraq Collection size … Wikipedia
White phosphorus (weapon) — This article is about the military applications of white phosphorus. For more general information, see Phosphorus. White phosphorus (WP) is a flare and smoke producing incendiary weapon,cite web | title=Pyrotechnics, Explosives, Fireworks |… … Wikipedia
Disasters — ▪ 2009 Introduction Aviation January 23, Poland. A Spanish built CASA transport plane carrying members of the Polish air force home from a conference on flight safety in Warsaw crashes near the town of Miroslawiec; all 20 aboard are killed … Universalium
Pineal gland — Diagram of pituitary and pineal glands in the human brain Latin glandula pinealis Gray s … Wikipedia
Akosombo Dam — width= m to ft | num=366 | abbr=yes | spell= | precision=0 | wiki=no began= 1961 open= 1965 closed= cost= £130 million reservoir capacity= 148 x 1012 litres reservoir catchment= 8502 sq.km reservoir surface= bridge carries= bridge width= bridge… … Wikipedia
Dental amalgam controversy — Dental amalgam filling The dental amalgam controversy refers to the conflicting views over the use of amalgam as a filling material mainly because it contains the element mercury. The concern centers on the health effects of toxicity or allergy… … Wikipedia