• reacts
  • The more unsaturated an unknown is, the more bromine it reacts with, and the less coloured the solution will appear. (wikipedia.org)
  • Should the brown colour not disappear, possibly due to the presence of an alkene which does not react, or reacts very slowly with, bromine, the potassium permanganate test should be performed, in order to determine the presence or absence of the alkene. (wikipedia.org)
  • In addition, bromine water is commonly used to test for the presence of an alkene which contains a double covalent bond which reacts with the bromine water which changes its color from an intense yellow to a colorless solution. (wikipedia.org)
  • bromide
  • While it is rather rare in the Earth's crust, the high solubility of the bromide ion (Br−) has caused its accumulation in the oceans. (wikipedia.org)
  • Although large amounts are toxic and cause bromism, a clear biological role for bromide and hypobromous acid has recently been elucidated, and it now appears that bromine is an essential trace element. (wikipedia.org)
  • As a pharmaceutical, the simple bromide ion (Br−) has inhibitory effects on the central nervous system, and bromide salts were once a major medical sedative, before replacement by shorter-acting drugs. (wikipedia.org)
  • In the early years of the First World War, bromine compounds such as xylyl bromide were used as poison gas. (wikipedia.org)
  • Bromine dioxide can also be formed by the treatment of bromine gas with ozone in trichlorofluoromethane at −50 °C. When mixed with a base, bromine dioxide gives the bromide and bromate anions: 6 BrO2 + 6 NaOH → NaBr + 5 NaBrO3 + 3 H2O Perry, Dale L. (wikipedia.org)
  • The Bromine Number is usually determined by electrochemical titration, where bromine is generated in situ with the redox process of potassium bromide and bromate in an acidic solution, using a mercury catalyst to ensure the complete bromination of all olefins. (wikipedia.org)
  • Bromide is converted to bromine at the positive electrode surface and is stored in a safe, chemically complexed organic phase in the electrolyte tank. (wikipedia.org)
  • Chemistry
  • Bromine monochloride is used in analytical chemistry in determining low levels of mercury, to quantitatively oxidize mercury in the sample to Hg(II) state. (wikipedia.org)
  • equivalent
  • The California ARB, in its Motor Vehicle Fuels Compliance Assistance Program, indicated that every unit of Bromine Number is equivalent to twice the percentage point of olefin content in gasoline. (wikipedia.org)
  • water
  • Löwig isolated bromine from a mineral water spring from his hometown Bad Kreuznach in 1825. (wikipedia.org)
  • Bromine monochloride is used as a biocide, specifically as an algaecide, fungicide, and disinfectant, in industrial recirculating cooling water systems. (wikipedia.org)
  • mainly
  • Institutions of tertiary education were allowed to use the ccSLD .edu.br, although some use .com.br and others (mainly public universities) use .br. (wikipedia.org)
  • data
  • One refinery compiled a year's worth of data on Bromine Number and the corresponding olefin content of gasoline. (wikipedia.org)
  • The data showed that the Bromine Number of gasoline is about 2.4 times the olefin content. (wikipedia.org)
  • color
  • Bromine, the brownish color, and the compound discovered in kelp, used for film emulsions made the mood for this image. (photoawards.com)
  • Brazil
  • br is the Internet country code top-level domain (ccTLD) for Brazil. (wikipedia.org)
  • Created and delegated to Brazil in 1989 by Jon Postel, initially the domain was operated manually by Registro.br and administered by the Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP). (wikipedia.org)
  • As such, even before Brazil officially connected to the Internet in 1991, the .br domain was used to identify the machines participating in networks already in use by academics. (wikipedia.org)
  • In 1995 the Comitê Gestor da Internet no Brasil "Internet Management Committee of Brazil" (CGI.br) was created with an objective to coordinate the allocation of Internet addresses (IPs) and the registration of .br domain names. (wikipedia.org)
  • different
  • A different approach of the battery relies on laminar flow to separate the two materials instead of a membrane, reacting liquid bromine with hydrogen gas to generate electricity. (wikipedia.org)
  • Zinc bromine batteries from different manufacturers have energy densities ranging from 34.4-54 W·h/kg. (wikipedia.org)
  • time
  • During charging zinc is electroplated onto conductive electrodes, while at the same time bromine is formed. (wikipedia.org)
  • NIC's director at the time, Frederico Neves, denied that NIC.br was "hacked", although NIC admitted the vulnerability. (wikipedia.org)
  • center
  • It was administered by the Brazilian Internet Steering Committee (Comitê Gestor da Internet no Brasil) until 2005 when it started being administered by Brazilian Network Information Center (Núcleo de Informação e Coordenação do Ponto br). (wikipedia.org)
  • In 2005, CGI.br created his own executive arm, the Núcleo de Informação e Coordenação do Ponto BR' "The Center for Information and Coordination of Dot BR" (NIC.br), which currently serves in both administrative and operational capacity for the registry. (wikipedia.org)
  • high
  • The primary features of the zinc bromine battery are: High energy density relative to lead-acid batteries 100% depth of discharge capability on a daily basis No shelf life limitations as zinc-bromine batteries are non-perishable, unlike lead-acid and lithium-ion batteries, for example. (wikipedia.org)
  • known
  • Bromine (35Br) has two stable isotopes, 79Br and 81Br, and 30 known radioisotopes, the most stable of which is 77Br, with a half-life of 57.036 hours. (wikipedia.org)
  • Thompson's Bromine and Arsenic Springs, also known as Healing Springs, is a historic mineral spring resort and national historic district located near Crumpler, Ashe County, North Carolina. (wikipedia.org)
  • enter
  • To register any domains under .br, it is necessary to enter into contact with Registro.br. (wikipedia.org)