Topic
Bromine
About: Bromine is a research topic. Over the lifetime, 5096 publications have been published within this topic receiving 70044 citations. The topic is also known as: Br & element 35.
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TL;DR: When silvery films of the semiconducting polymer, trans polyacetylene, (CH)x, are exposed to chlorine, bromine, or iodine vapour, uptake of halogen occurs, and the conductivity increases markedly (over seven orders of magnitude in the case of iodine) to give silvery or silvery-black films, some of which have a remarkably high conductivity at room temperature.
Abstract: When silvery films of the semiconducting polymer, trans‘polyacetylene’, (CH)x, are exposed to chlorine, bromine, or iodine vapour, uptake of halogen occurs, and the conductivity increases markedly (over seven orders of magnitude in the case of iodine) to give, depending on the extent of halogenation, silvery or silvery-black films, some of which have a remarkably high conductivity at room temperature.
3,197 citations
TL;DR: The reaction is applied in a number of ways, such as in the structural elucidation of peptides and proteins, the detection of multiple forms of enzymes and of oxidized residues of methionine, the preparation of physiologically active peptide fragments, the location of newly introduced cross-linkages in enzymes, and the identification and characterization of fragments from enzyme active sites.
Abstract: Publisher Summary This chapter discusses the applications of the cyanogens bromide reaction Cyanogen bromide is capable of cleaving thioethers The action of cyanogen bromide upon proteins is unique in its selective attack on methionine The reaction of methionine with cyanogen bromide is greatly facilitated by the strong neighboring group effect exerted by the carboxyl group Cyanogen bromide is synthesized from bromine and potassium cyanide The selectivity of the reaction of cyanogen bromide with amino acids depends on pH The selectivity of the cyanogen bromide reaction is demonstrated by exposure to cyanogen bromide of a standard mixture of amino acids, as is used for calibration purposes in automated amino acid analyzer systems A number of applications to the general structural elucidation of peptides and proteins are: ribonuclease, rabbit γ-globulin, and chymotrypsin The reaction is applied in many other instances and is useful in a number of ways, such as in the structural elucidation of peptides and proteins, the detection of multiple forms of enzymes and of oxidized residues of methionine, the preparation of physiologically active peptide fragments, the location of newly introduced cross-linkages in enzymes,and the identification and characterization of fragments from enzyme active sites
743 citations
TL;DR: In this article, the presence of reactive chlorine in the marine boundary layer has been investigated, showing that reactions involving chlorine and bromine can affect the concentrations of ozone, hydrocarbons and cloud condensation nuclei.
Abstract: Recent measurements of inorganic chlorine gases [1] and hydrocarbons [2] indicate the presence of reactive chlorine in the remote marine boundary layer; reactions involving chlorine and bromine can affect the concentrations of ozone, hydrocarbons and cloud condensation nuclei.
681 citations
TL;DR: In this article, second-order rate constants for reactions of ozone with 40 inorganic aqueous solutes are reported, including compounds of sulfur (e.g. H2S, HOCl, NH2Cl, HClO2, ClO2), bromine (i.e., Br−, HOBr), nitrogen (e., NH3, N2O, HNO2), as well as free radicals (e,g. O2−, OH•).
659 citations
TL;DR: Results showed that preozonation decreased the formation of trihalomethanes, haloacetic acids (HAAs) and total organic halogen (TOX) for most waters during postchlorination, while a net increase in THMs, HAAs and TOX was observed for a water of low humic content.
630 citations