Green, Acid Victoria

A green or blue pigment manufactured by precipitating basic dyestuffs such as malachite green or Victoria blue with solutions of phosphotungstic acid, phosphomolybdic acid, or a mixture of both. 

Many other basic dyes besides Methyl Violet have been used in sensitive extraction-spectrophotometric methods for the determination of Ta as the anionic complex TaFe [92]. Mention may be made of Crystal Violet (formula 4.27) (e = 8.5-10" ) [91-93], Brilliant Green (e = 1.2-10 ) [94,95], Malachite Green [96,97], Methyl Green (e = 1.2-10 ) [98], Rhodamine 6G and butylrhodamine B [99], Methylene Blue (e = 9.1-10" ) [98], Nile Blue A [100], Capri Blue (e = I.TIO ) [101], and Victoria Blue B [102]. Ion-associates with these dyes are extractable from acid solutions into benzene, toluene, CHClj, xylene, or dichloroethane. 

Victoria Green 3 B is a chlorinated malachite green prepared from dichlorobenzoic aldehyde and dimethylaniline. The introduction of halogen leads to the formation of a dye which yields bluer shades of green than malachite green. The sulphonic acid derivatives of these dyes, as well as those derived from dimethylaniline, are also manufactured. 

Green fluorescent proteins (GFPs) are found in a variety of bioluminescent organisms such as the jellyfish Aequorea victoria and the anemone Disco-soma. While most of other proteins require a cofactor to fluoresce, GFPs exhibit intrinsic fluorescence thanks to three amino acids that cyclize... 

GFP, Part I Nature s Fluorophore The Pacific jellyfish At ijuorefl victoria has proven to be a real boon to chemical biologists. This beautiful creature lives in the deep dark waters of the Pacific Ocean, where it glows a brilliant green. The source of this color is a remarkable molecule known as green fluorescent protein (GFP). This protein is 238 amino acids long and contains a chro-mophore that produces an intense green fluorescence. 

Proteins that exhibit fluorescence in their native form were extensively studied and utilized in a variety of apphcations. One important example is green fluorescent protein (GFP) of Aequorea victoria and its mutants (BFP, CFP, YFP), which exhibit blue, cyan, and yeUow emissions, respectively. In addition, a novel fluorescent protein, termed DsRed, was recently cloned and characterized. These proteins are unique in having fluorophores formed from the natural amino acid side chains via cyclization. A major application for them is the creation and expression of fluorescent fusion proteins. Such fusion constructs were used in a variety of apphcations involving in vitro and in vivo spatial and temporal fluorescence... 

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