alizarin वाक्य
उदाहरण वाक्य
मोबाइल
- In 1868, German chemists Carl Graebe and Liebermann were able to synthesize alizarin, and to produce it from coal tar.
- Alizarin is the main ingredient for the manufacture of the madder lake pigments known to painters as Rose madder and Alizarin crimson.
- Alizarin is the main ingredient for the manufacture of the madder lake pigments known to painters as Rose madder and Alizarin crimson.
- Alizarin itself has been in turn largely replaced today by the more light-resistant quinacridone pigments developed at DuPont in 1958.
- Free ( ionic ) calcium forms precipitates with alizarin, and tissue block containing calcium stain red immediately when immersed in alizarin.
- Free ( ionic ) calcium forms precipitates with alizarin, and tissue block containing calcium stain red immediately when immersed in alizarin.
- Their research helped with the creation of the synthetic alizarin industry, or the process of replacing natural dye obtained from madder.
- After synthetic pigments and dyes such as alizarin were invented in the late 19th century, natural-dye production gradually diminished.
- Alizarin crimson is a dye bonded onto alum which is then used as a pigment and mixed with ochre, sienna and umber.
- In 1835, a " T�rkisch Rotgarn " ( an Alizarin red color ) dye-works opened in the village.
- Rubian was an uncrystallisable gum, hydrolysable by acids or an enzyme contained in the madder root to give alizarin and a sugar.
- William Perkin, the inventor of mauve, filed a patent in June 1869 for a new way to produce alizarin without bromine.
- The plant's roots contain an anthracene compound called alizarin that gives its red colour to a textile dye known as Rose madder.
- The synthetic alizarin could be produced for a fraction of the cost of the natural product, and the market for madder collapsed virtually overnight.
- He found that oxidation of alizarin with nitric acid gave alizaric acid ( phthalic acid ) which on heating gave pyroalizaric acid ( phthalic anhydride ).
- Purpurin is only present in the natural form of madder and gives a distinctive orange / red generally warmer tone that pure synthetic alizarin does not.
- After Leverkus'death in 1891 his sons sold a portion of the factory site in Wiesdorf to the alizarin manufacturer " Elberfelder Farbenfabriken vorm.
- Rubian was actually a mixture of glycosides of di and trihydroxy anthraquinones of which a major component was ruberythric acid which is an alizarin 2 b primeveroside.
- These works, rendered in a variety of reds, from subtle orange to deep Alizarin and brown Madders are drawn from the subjects of mythology and drama.
- This led to the suggestion that alizarin was a derivative of naphthalene, a C10 hydrocarbon, although Schunck pointed out that this did not explain the reactions of alizarin.
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