ammonium bromide


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ammonium bromide

[ə′mōn·yəm ′brō‚mīd]
(inorganic chemistry)
NH4Br An ammonium halide that crystallizes in the cubic system; made by the reaction of ammonia with hydrobromic acid or bromine; used in photography and for pharmaceutical preparations (sedatives).
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N-(carboxymethyl)-3-methyl-1-[5-(methylthio)-1,3,4-oxadiazol-2-yl]butan-1- ammonium bromide (6a): Rf=0.3(CH[Cl.sub.3]/MeOH 4/1); yield 44%; thick syrup; IR (KBr v max [cm.sup.-1]): 3419 (O-H), 2927 (C-H), 1720 (C=O), 1647 (C=N), 1091 (C-O-C), 887 (C-S-C).
P-methylaniline as well as Dibromobutylene oxide was purchasing from Sinopharm Chemical Reagent Beijing Co., Ltd, Bromoethanesulfonic acid sodium salt as well as tetrabutyl ammonium bromide was purchasing from Tianjin Kemiou Chemical Reagent Co., phase transfer catalyst was purchasing Shanghai Cathay Chemical Ltd, Stainless steel sheet, 10 mm x 10 mm x 2 mm, was detriment from Dongguan Chenghui Hardware Factory.
The most significant ones could be listed as a) Sodium dodecyl sulfate (SDS) Chandrasekhar et al [5], b) Salt and oleic acid, c) Cetyltri methyl ammonium bromide (CTAB), Jiang [6], d) Dodecyle trimethylammonium bromide (DTAB) and sodiumoctanoate (SOCT), Li et al [7], e) Hexadecyltri methyl ammonium bromide(HCTAB),Yu et al [8], f) Polyvinyl pyrrolidone' 1q (PVP), Pantzali et al [9], and g) Gum Arabic, Madni et al [10].
N80 steel specimen was immersed in 20 wt.% HCl solutions in the absence or presence of different concentrations of propargyl quaternary ammonium bromide for 4 h at 60 or 90[degrees] C, in which the ratio of volume (mL) of HCl solutions to surface area ([cm.sup.2]) of the specimens was 20 : 1.
Examples of adjuvants used with variety of vaccines include Montanide incomplete Seppic adjuvant (ISA) series, ISA 70 VG (ISA 70) and ISA 71 VG (ISA 71), and Quil A, cholesterol, dimethyl dioctadecyl ammonium bromide, and Carbopol (QCDC) adjuvant complex, whereby the former is a water-in-oil emulsion and the latter is composed of Quil A, cholesterol, dimethyl dioctadecyl ammonium bromide (DDA), and Carbopol (Aucouturier et al., 2006; Cox et al., 2003; Dominowski et al., 2009).
To begin with the molecular characterization total DNA was extracted from leaves of infected as well as healthy trees using the Cetyl Trimethyl Ammonium Bromide (CTAB) method [6].
Genomic DNA of single chironomid midges was extracted using the Cetyl-Trimethyl Ammonium Bromide (CTAB) method, the Proteinase K method and the Chelex-100 method, respectively.
The effect of surfactants; cetyltrimethyl ammonium bromide (CTAB), cetylpyridinium chloride (CPC), Tween-80 (TW-80) and TritonX-100 (TX-100), of 0.1 % concentration, on the absorption spectra of products have been investigated.
The cross-linking of BUR with nitrogen nucleophiles involves alkylation by allylic bromide, followed by deprotonation of the resulting ammonium bromide sail to give an allylic amine intermediate (Scheme 1; R(1)=H).
Modified silica can be obtained by using cationic surfactants (hexadecyl trimethyl ammonium bromide and tetraethylammonium bromide).
Another group is soaked three minutes in 0.1% solution of hexade-cyltrimethyl ammonium bromide as the positive control.
Starks (1971), Herriott and Picker (1974) used different quaternary ammonium salts like Aliquat 336, benzyl triethylammoniumchloride, tetrabutylammonium bromide, and cetyl trimethyl ammonium bromide to extract permanganate ion from aqueous solution for oxidation reactions.