Negative colour films are similar, but the couplers are often already coloured yellow or red or both.
(E ) Density difference maps for the ensemble structure (m F obs − D F model )exp[ iφ model ], left-hand side, and the single structure right-hand side, contoured at 0.34 e/Å (equivalent to 3.0 σ for the ensemble model), positive and negative densities are coloured green and red respectively.
In 1855 the British physicist James Clerk Maxwell argued that a full-colour photographic record of a scene could be made by filming three separate black-and-white negatives through filters coloured, respectively, red, green, and blue, the three primary colours.
The salts are colourless unless they include a coloured anion (negative ion).
Positive and negative values are shown as coloured blocks, and zero entries are represented by black blocks.
A negative result produces two pink coloured bands, one at the control region (C) and the other at the test region (T).
"Black people prefer to be referred to as black, because historically the term coloured has carried particularly negative connotations, an offensive undertone.
Many caves (such as the group of caves at El Castillo, Cantabria) show rows of coloured dots, arrowlike marks, negative impressions of human hands, and signs interpreted as vulvas.
Electrostatic surface images were created with the APBS plug-in for PyMOL (http://www.pymol.org/) with positive potential coloured in blue and negative potential in red.
Regions with minor negative impedance changes are inhibited and coloured black in status images (which are used in our study).
Dynamic optical acquisition was strongly suggestive of an underlying malignancy, detecting a blue-coloured, hypoxic area with negative dynamic curves (Fig. 3c).
