saturated solution of bromine in water, (b) 15 ecs. of 38 per cent hydrochloric acid and 45 gms. potassium permanganate in 200 ccs. water. The colour forming developer includes 2 : amino 5: diethylamino toluene hydrochloride. The colours of the developed layers may or may not be ...
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. Commercially the element is easily extracted from brine evaporation ponds, mostly in the United States, Israel, and China. The mass of bromine in the ...
aPlease indicate which of the following communications you have received from Accor Advantage Plus in the past. 请表明哪些以下通信您从Accor好处加号接受了从前。[translate] aGermanium substrate treatment method for microelectronic device, involves using iodine and bromine free solution, and another solution...
Elemental bromine is very reactive and thus does not occur free in nature, but in colourless soluble crystalline mineral halide salts, analogous to table salt. Čisti brom se ne nalazi u prirodi, već uglavnom u vidu bezbojnih, rastvorljivih kristalnih halidnih mineralih soli, analog...
IN performing this test Knoop [1908] adds bromine water to the solution to be tested until there is just a very slight excess. On heating, the excess bromi... G Hunter 被引量: 0发表: 2005年 Method of stress control and prediction in fixing devices of color picture tubes A method has ...
(Aloupi et al.2000; Maravelaki-Kalaitzaki and Kallithrakas-Kontos2003; Sotiropoulou2004; Coccato et al.2020); care must be taken, however, as a recent work (Aceto et al.2015) demonstrated that the sole evidence of bromine is not enough for an exclusive identification of Tyrian purple:...
in place of the chlorine atom, another replaceable substituent such as a nitro or methoxy group; (4) the potassium salt of anthraquinone-1-sulphonic acid is heated with aqueous isopropylamine, the product is either treated with bromine in glacial acetic acid, then with benzenesulphonamide and sa...
1. The method of removing the excess of hydrobromic acid after it has had a chance to react chemically with gelatin has permitted us to measure the amount of Br in combination with the gelatin. It is shown that the curves representing the amount of bromine bound by the gelatin are ...
methoxy, ethoxy, butoxy, decocyl, octadecoxyl, chlorine, or bromine, or water-solubilizing groups such as hydroxyl, sulphonic, and carboxylic groups. The amino residues may be linked to the benzene groups at the 6:61, 5:51, and 4:61, but preferably the 4:41 positions. Examples specified...
Compounds of the general formula wherein R is an alkyl group of at least 10 carbon atoms and X is fluorine, bromine or chlorine are similarly prepared by using the appropriate alkyl halide to give a 3-amino-4-alkoxy-benzoic acid and condensing this with the appropriate ortho-halo-benzoyl...