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A counterstain is a stain with colour contrasting to the principal stain, making the stained structure easily visible using a microscope. Examples include the malachite green counterstain to the fuchsine stain in the Gimenez staining technique and the eosin counterstain to haematoxylin in the H&E stain. [1]
[1] [2] Once stained as part of a sample, these organisms can resist the acid and/or ethanol-based decolorization procedures common in many staining protocols, hence the name acid-fast. [ 2 ] The mechanisms of acid-fastness vary by species although the most well-known example is in the genus Mycobacterium , which includes the species ...
A Ziehl–Neelsen stain is an acid-fast stain used to stain species of Mycobacterium tuberculosis that do not stain with the standard laboratory staining procedures such as Gram staining. This stain is performed through the use of both red coloured carbol fuchsin that stains the bacteria and a counter stain such as methylene blue.
Another factor in stain removal is the fact that stains can sometimes comprise two separate staining agents, which require separate forms of removal. A machine oil stain could also contain traces of metal, for example. [1] Also of concern is the color of the material that is stained.
The Hindustani language is the language of Hindustan and the lingua franca of the northern Indian subcontinent. [22] Hindustani derives from the Old Hindi language of Western Uttar Pradesh and Delhi areas. Its literary standard forms—Modern Standard Hindi and Modern Standard Urdu—use different scripts.
Hindustani, the lingua franca of Northern India and Pakistan, has two standardised registers: Hindi and Urdu.Grammatical differences between the two standards are minor but each uses its own script: Hindi uses Devanagari while Urdu uses an extended form of the Perso-Arabic script, typically in the Nastaʿlīq style.
Hindi–Urdu transliteration (or Hindustani transliteration) is essential for Hindustani speakers to understand each other's text, and it is especially important considering that the underlying language of both the Hindi & Urdu registers are almost the same. [4]
This category contains articles with Hindi-language text. The primary purpose of these categories is to facilitate manual or automated checking of text in other languages. This category should only be added with the {} family of templates, never explicitly.