Malachite green metabolized into LMG. Only the cation MG is deeply colored, whereas the leuco and alcohol derivatives are not. This difference arises because only the cationic form has extended pi-delocalization, which allows the molecule to absorb visible light. The leuco form of malachite green was first prepared by Hermann Fischer in 1877 by condensing benzaldehyde and dimethylaniline in the molecular ratio 1:2 in the presence of sulfuric acid. Malachite green is traditionally used as a dye. Kilotonnes of MG and related triarylmethane dyes are produced annually for this purpose. MG is active against the oomycete "Saprolegnia", which infects fish eggs in
The Malachite Casket (fairy tale) me the Tsarina, and you've done it so as to show me to her. [...] I don't want to see any more of ye". Adding that he is no match for her anyway, Tanyushka leans against the malachite wall and melts away. She is never seen again, but the Mistress of the Copper Mountain gets a twin—people see two maids in malachite robes. Most scholars agree that Tanyushka—literally or metaphorically—is the daughter of the Mistress of the Copper Mountain. It was suggested that the Casket symbolizes the mystery that connected Stepan and the Mistress, or the secret marriage between the