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Printable version; Page information; ... You are free: to share – to copy ... 1=A pH scale with annotated examples of chemicals at each integer pH value.}} ...
The pH scale is by far the most commonly used acidity function, and is ideal for dilute aqueous solutions. Other acidity functions have been proposed for different environments, most notably the Hammett acidity function , H 0 , [ 3 ] for superacid media and its modified version H − for superbasic media.
A universal indicator is a pH indicator made of a solution of several compounds that exhibit various smooth colour changes over a wide range pH values to indicate the acidity or alkalinity of solutions. A universal indicator can be in paper form or present in a form of a solution. [1]
The Hammett acidity function (H 0) is a measure of acidity that is used for very concentrated solutions of strong acids, including superacids.It was proposed by the physical organic chemist Louis Plack Hammett [1] [2] and is the best-known acidity function used to extend the measure of Brønsted–Lowry acidity beyond the dilute aqueous solutions for which the pH scale is useful.
The National Imagery Interpretability Rating Scale (NIIRS) is an American subjective scale used for rating the quality of imagery acquired from various types of imaging systems. The NIIRS defines different levels of image quality/interpretability based on the types of tasks an analyst can perform with images of a given NIIRS rating.
The isoelectric point (pI, pH(I), IEP), is the pH at which a molecule carries no net electrical charge or is electrically neutral in the statistical mean. The standard nomenclature to represent the isoelectric point is pH(I). [1] However, pI is also used. [2] For brevity, this article uses pI.
In 1948, the photographer's mate abbreviation changed from PHOM to PH, and the symbol of the camera on the rating badge was replaced by divergent light rays passing through a lens. As jet aircraft appeared, the old 9 in (230 mm) film width was replaced by 70 mm (2.8 in) and then 5 in (130 mm) film in larger cameras.
File:MPA R RATING (block).svg Metadata This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.