更新1: 我明左好多啦 问多你少少野 acid 加落 alkali methyl orange 做 indicator colour change 系 yellow to orange? alkali 加落 acid methyl orange 做 indicator colour change 系 red to orange?1. phenolphthalein 的颜色：pink (or red) in alkali colourless in alkal...
Tetrahedron letters: The International Journal for the Rapid Publication of Preliminary Communications in Organic ChemistryF. Sancenon, R. Martinez-Man˜ ez, J. Soto, Colourimetric detection of Hg2+ by a chromogenic reagent base on methyl orange and open-chain polyazaoxaalka- nes, Tetrahedron ...
1.Use of fluorine-substituted perylenes in colour filters for liquid-crystal displays. 2.Use according to claim 1, characterized in that the fluorine-substituted perylene is of the formula (I)in whichR is H or is an optionally substituted organic radical andR1, R2, R3and R4independently of ...
SCHWIETER ß-lonone is lengthened to the ß-C14-aldehyde by glycidic ester synthesis followed by alkali treatment. The side-chain ofthis aldehyde is Iinked to the ring by a CH2-group, thus interrupting the conjugation with the ring double bond. For chain lengthening the ß-C14-aldehyde ...
A huge volume of contaminated wastewater is discharged into the water bodies from textile industries. Therefore, water pollution is gradually becoming one
Thermo-active and alkaliphilic amalgamated laccase immobilized on sodium alginate for synthetic dye decolourizationAmalgamationdecolourizationhybridimmobilizationlaccasetextile-dyePurified crude laccase of Enterobacter sp. Kamsi and Bacillus sp. NU2 in the hybrid and combined form was immobilized on sodium ...
The acid used may be hydrochloric, hydrobromic, hydroiodic, sulphuric, sulphamic, or phosphoric acid, with or without the presence of ammonium chloride or an alkali halide such as sodium or potassium bromide or iodide or sodium chloride. The use of a weaker acid such as acetic, propionic, ...
Excess chlorine is removed by sodium sulphite, the silver chloride is exposed by means of a mercury vapour lamp and this image is developed by immersion of the whole film in a bath containing thioindoxyl alkalised by caustic soda and protected against oxidation by sodium sulphite, to give ...
with an ester of a low alkanol in the presence of alkalie to form a compound of the formula and coverting the latter with further ester into the desired colour salt or (c) converting a compound of the formula with an ester of a low alkanol to a compound of the formula into the ...
[47]. Shoot growth was earlier reported to be inhibited in Methyl orange contamination [48]. In comparison, our results show that plants grown in CR aqueous solution probably faced a direct impact from azo dye molecules in terms of germination inhibition, seedling health, and affected shoot-...