Brú na Bóinne (Irish: [ˈbˠɾˠuː n̪ˠə ˈbˠoːn̪ʲə], Palace of the Boyne) is a World Heritage Site in County Meath, Ireland and is the largest and one of the most important complex of Megalithic sites in Europe, dating to the Neolithic period. The complex is situated around a wide bend in the River Boyne.
The site is a complex of Neolithic mounds, chamber tombs, standing stones, henges and other prehistoric enclosures, some from as early as 35th century BC - 32nd century BC. The site predates the Egyptian pyramids and was built with sophistication and a knowledge of science and astronomy, which is most evident in the passage grave of Newgrange. The site is often referred to as the "Bend of the Boyne" and this is often (incorrectly) taken to be a translation of Brú na Bóinne (Palace of the Boyne). The associated archaeological culture is often called the Boyne culture.
The site covers 780 ha (1927 acres) and contains around 40 passage graves, as well as other prehistoric sites and later features. The majority of the monuments are concentrated on the north side of the river. The most well-known sites within Brú na Bóinne are the impressive passage graves of Newgrange, Knowth and Dowth, all famous for their significant collections of megalithic art. Each stands on a ridge within the river bend and two of the tombs, Knowth and Newgrange, appear to contain stones re-used from an earlier monument at the site. There is no in situ evidence for earlier activity at the site, save for the spotfinds of flint tools left by Mesolithic hunters.
A bromide is a chemical compound containing a bromide ion or ligand. This is a bromine atom with an ionic charge of −1 (Br−); for example, in caesium bromide, caesium cations (Cs+) are electrically attracted to bromide anions (Br−) to form the electrically neutral ionic compound CsBr. The term "bromide" can also refer to a bromine atom with an oxidation number of −1 in covalent compounds such as sulfur dibromide (SBr2).
Bromide is present in typical seawater (35 PSU) with a concentration of around 65 mg/L, which is around 0.2% of all dissolved salts. Seafoods and deep sea plants generally have high levels of bromide, while foods derived from land have variable amounts.
One can test for a bromide ion by adding excess dilute HNO3 followed by dilute aqueous AgNO3 solution. The formation of creamy silver bromide precipitate confirms the existence of bromides.
Bromide compounds, especially potassium bromide, were frequently used as sedatives in the 19th and early 20th century. Their use in over-the-counter sedatives and headache remedies (such as Bromo-Seltzer) in the United States extended to 1975, when bromides were withdrawn as ingredients, due to chronic toxicity.
BR or Br may refer to:
Coordinates: 58°21′14″N 6°32′56″W / 58.354°N 6.549°W / 58.354; -6.549
Brue (Scottish Gaelic: Brù) is a village on the Isle of Lewis in the West Side district, in the Outer Hebrides, Scotland. It is a crofting township and it is composed of two areas: Am Baile Staigh, which is nearer the coast, and Pàirc Bhrù, which runs towards the moor. In total it covers a road distance of 2.5 km. Brue is situated on a minor road which joins to the A858, and is within the parish of Barvas.
The name Brue is an anglicised form of the Scottish Gaelic Brù which in turn comes from an Old Norse word which is believed to have meant bridge; this reflects the centuries of Norsemen occupation and settlement in the Outer Hebrides.
The coastline at Brue is the site of various cairns, including a prehistoric one, and is also near to the site of a blackhouse.