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In the case of transmission electron microscopy, opaqueness to electrons is related to the atomic number, i.e., the number of protons.Some suitable negative stains include ammonium molybdate, uranyl acetate, uranyl formate, phosphotungstic acid, osmium tetroxide, osmium ferricyanide [clarification needed] [2] and auroglucothionate.
India ink (British English: Indian ink; [1] also Chinese ink) is a simple black or coloured ink once widely used for writing and printing and now more commonly used for drawing and outlining, especially when inking comic books and comic strips. India ink is also used in medical applications.
This can be achieved by smearing the sample onto the slide and then applying nigrosin (a black synthetic dye) or India ink (an aqueous suspension of carbon particles). After drying, the microorganisms may be viewed in bright field microscopy as lighter inclusions well-contrasted against the dark environment surrounding them. [ 6 ]
I recently needed to replace the ink on my HP inkjet printer. Four little name-brand HP cartridges of yellow, blue, red and black cost me $123. Ounce for ounce, that's more than the price of Dom ...
Structure of a major component of the dye nigrosin. In staining dyes, nigrosin (CI 50415, Solvent black 5) is a mixture of black synthetic dyes made by heating a mixture of nitrobenzene, aniline, and hydrochloric acid in the presence of copper or iron. [1] Related to induline, it is a mixture of phenazine-based compounds.
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The manufacture of India ink was well-established by the Cao Wei dynasty (220–265 AD). [13] Indian documents written in Kharosthi with ink have been unearthed in Xinjiang. [14] The practice of writing with ink and a sharp pointed needle was common in early South India. [2] Several Buddhist and Jain sutras in India were compiled in ink. [3]
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