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Similarly, color is due to the energy absorbed by the compound, when an electron transitions from the HOMO to the LUMO. Lycopene is a classic example of a compound with extensive conjugation (11 conjugated double bonds), giving rise to an intense red color (lycopene is responsible for the color of tomatoes).
The Amazon river dolphin is the largest species of river dolphin, with adult males reaching 185 kilograms (408 lb) in weight, and 2.5 metres (8.2 ft) in length. Adults acquire a pink color, more prominent in males, giving it its nickname "pink river dolphin".
A pseudo-melanistic leopard has a normal background color, but the spots are more densely packed than normal, and merge to obscure the golden-brown background color. Any spots on the flanks and limbs that have not merged into the mass of swirls and stripes are unusually small and discrete, rather than forming rosettes.
Much terminology has existed and does exist for the classification of color blindness, but the typical classification for color blindness follows the von Kries classifications, [25] which uses severity and affected cone for naming.
A second type of lamp produces ultraviolet but does not have the filter material, so it produces more visible light and has a blue color when operating. [2] [3] [4] These tubes are made for use in "bug zapper" insect traps, and are identified by the industry designation "BL". [4] [5] This stands for "blacklight".
Eggplant is a dark purple [15] or purplish brown, [16] color that resembles the color of the outer skin of European eggplant. [17] Another name for the color "eggplant" is aubergine [16] (the French and British English word for eggplant). The first recorded use of "eggplant" as a color name in English was in 1915. [18] Eggplants, or aubergines
An example of retinal-based organisms that exist today are photosynthetic microbes collectively called Haloarchaea. [1] Many Haloarchaea contain the retinal derivative protein bacteriorhodopsin in their cell membrane, which carries out photon-driven proton pumping, generating a proton-motive gradient across the membrane and driving ATP synthesis.
The Grimace Shake was a berry-flavored milkshake [1] that was first sold at McDonald's restaurants in the United States from June 11 to July 11, 2023, to celebrate the 52nd birthday of Grimace, the purple, milkshake-loving character from McDonaldland. The shake was then introduced in Canada the following year, starting on May 14, 2024. [2]