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The name gentian violet was originally used for a mixture of methyl pararosaniline dyes (methyl violet), but is now often considered a synonym for crystal violet. The name refers to its colour, being like that of the petals of certain gentian flowers; it is not made from gentians or violets .
Penstemon gentianoides, the gentian beardtongue or gentian-leaved penstemon, is a species of flowering plant in the plantain family Plantaginaceae.Found on volcanic mountain slopes across Mexico and Central America, especially in Mexican mountain pine forests, it is a somewhat shrubby perennial herb that can grow up to 1.5 meters tall in good conditions.
It is known in medicine as Gentian violet (or crystal violet or pyoctanin(e) [1]) and is the active ingredient in a Gram stain, used to classify bacteria. It is used as a pH indicator, with a range between 0 and 1.6. The protonated form (found in acidic conditions) is yellow, turning blue-violet above pH levels of 1.6. [4]
Podiatrists explain what athlete’s foot is, how people get athlete’s foot and how to prevent it. They also share over-the-counter treatments for athlete’s foot that can help get rid of it.
Gram-positive cells have a thick layer of peptidoglycan in the cell wall that retains the primary stain, crystal violet. Gram-negative cells have a thinner peptidoglycan layer that allows the crystal violet to wash out on addition of ethanol. They are stained pink or red by the counterstain, [3] commonly safranin or fuchsine.
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Whitfield's ointment is an acidic ointment used for the topical treatment of dermatophytosis, such as athlete's foot. It can have a slight burning effect that goes away after a few minutes. It is named after Arthur Whitfield (1868–1947), a British dermatologist. [1]
Gentiana puberulenta, the downy gentian, [1] is a branchless perennial plant of the Gentianaceae family native to North America. It is about ¾–1½' tall, [ 2 ] with bright blue to deep blue-violet bell-shaped, upright, five-lobed flowers measuring 1½ to 2¼ inches across when fully open. [ 3 ]