some moderately while others show no reaction. To determine the strength of acids and bases quantitatively, we use a universal indicator which shows different colours at different concentrations ofhydrogen ionsin solution. Generally, the value of pH of acids and bases are used to quantitatively deter...
change. Battery-powered portable pH meters are widely used forfieldtests of the pH of soils. Tests of pH may also be performed, less accurately, withlitmuspaper or by mixing indicator dyes in liquid suspensions and matching the resulting colours against a colour chartcalibratedin pH....
Limitations of pH scale There are somelimitations of the pH scale, which are as follows; The pH value of two different solutions does not give an idea about their comparative strengths. For example, a solution with pH value 1 may have 100 times more hydrogen ions than that of a solution ...
Colours in scatterplots for hierarchical predictions indicate weights used to combine Ỹa(s) and Ỹc(s) predictions according to Eq. (6). Bottom row displays density plots of observed validation data (solid black line), predictions computed for the validation locations (dotted yellow line)...
How does the amount of each pigment explain why leaves are certain colours? What is the importance of rinsing the pH electrode after each sample? Explain the difference between a cationic dye and an anionic dye in terms of cell staining. Thoroughly explain how the iodine chemical indicator (iod...
The time-scale of colour/pH changes in the caeca of 196 longfinned squid Loligo vulgaris reynauclii during digestion/absorption was tested at sea. Red, brown, dark yellow, pale yellow and white were the recorded colours. The range of mean pH for these colours was 6,0195,638. The time-...
The colours of the lines follow the same colour code as panel (a). (c) Modelled gradients of the OLS fit between DBL pH and bulk pH as a function of DBL size and P-R flux. The P-R flux is displayed as a multiplicative factor, one being the calculated P-R rate based on jar ...
Red Colouring Photochromic 6′-Substituted Spiroindolinon Aphth[2,1-b][1,4]Oxazines Electron donating/withdrawing substituents and electronegative centres have been successfully employed in substantially widening the range of photo-generated colours available in the spiroindolinonaphthoxazine class of pho...
Among these bio-structures, Morpho but- terfly wing, which can display beautiful, natural-occurring iridescent colours that are produced by hindering specific frequencies of lights with periodic structures in scales2, is a good example of utilizing fine structures provided by amazing nature. Due to...
Therefore, the multiscale hierarchical photonic crystal structure on the surface of a natural butterfly wing was used as a backbone, and a dual-responsive copolymer was polymerized in situ on the surface of the structure to impart dual-responsive properties to the natural PC structure. In this ...