alizarin वाक्य
उदाहरण वाक्य
मोबाइल
- 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.
- A notable use of alizarin in modern times is as a staining agent in biological research because it stains free calcium and certain calcium compounds a red or light purple color.
- Alizarin's abilities as a biological stain were first noted in 1567, when it was observed that when fed to animals, it stained their teeth and bones red.
- In 1869, the German chemists Graebe and Liebermann synthesised artificial alizarin, which was produced industrially from 1871 onwards, which effectively put an end to the cultivation of madder.
- Later, the hues were applied by wooden blocks, and the cloth manufacturers in Britain printing calico used alizarin dye fixed with two mordants, giving a red and black pattern.
- Adopting Grinstein Green ( an altered version of Brunswick Green / British Racing Green and named after the president of Burlington Northern, Gerald Grinstein ), Cream, and Alizarin Red.
- Natural rose madder supplied half the world with red, until 1868, when its alizarin component became the first natural dye to be synthetically duplicated by Carl Gr�be and Carl Liebermann.
- In 1826, the French chemist Pierre-Jean Robiquet discovered the organic compound alizarin, the powerful coloring ingredient of the madder root, the most popular red dye of the time.
- He was vindicated when Graebe and Liebermann ( 1868 ) distilled alizarin with zinc dust to give anthracene, a C 14 hydrocarbon, and subsequently ( 1869 ) synthesised alizarin from anthraquinone.
- He was vindicated when Graebe and Liebermann ( 1868 ) distilled alizarin with zinc dust to give anthracene, a C 14 hydrocarbon, and subsequently ( 1869 ) synthesised alizarin from anthraquinone.
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