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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 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.
In and of themselves, pH indicators are usually weak acids or weak bases. The general reaction scheme of acidic pH indicators in aqueous solutions can be formulated as: HInd (aq) + H 2 O (l) ⇌ H 3 O + (aq) + Ind − (aq) where, "HInd" is the acidic form and "Ind −" is the conjugate base of the indicator. Vice versa for basic pH indicators ...
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.
Free registration service. As of July 2017, payment of $400/year required if hosted images are to be displayed on external sites [19] Yes Yes 50,000,000 [20] With a free account, the user can use up to 10GB of bandwidth per month and 2GB storage. Unlimited free storage, 1MB per photo and 10 minutes per video (with image size restrictions).
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 Stephen H. White website [34] provides an example of whole residue hydrophobicity scales showing the free energy of transfer ΔG(kcal/mol) from water to POPC interface and to n-octanol. [34] These two scales are then used together to make Whole residue hydropathy plots. [ 34 ]