Bleaching


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Related to Bleaching: Bleaching Cream
Dentistry The process of removing stains from the teeth; whitening is the generally preferred term
Dermatology The process of removing color or pigment from the skin using various potentially harmful chemicals
Environment A mass extinction of coral in certain regions which is variously attributed to global warming or to local stressors
Vox populi The removing of stains or colours, in particular, the process of whitening fabrics by chemicals—e.g., bleach, or bleaching powder consisting of chloride of lime

Bleaching

Technique used to brighten stained teeth.
Mentioned in: Cosmetic Dentistry

Bleaching 

1. The process of changing colour from the pink of a dark-adapted retina to a pale yellow colour after it has been exposed to light. This is due to the reaction of the rhodopsin pigment. The process is reversible if the healthy retina is allowed to remain in the dark.
2. Process to remove a tint from organic lenses. See visual pigment.

bleach, bleach·ing

(blēch, blēching)
Removal of color from an object using chemicals or light.
References in periodicals archive ?
The teeth submitted to bleaching and sealed with Coltosol (GIII) showed the lowest strength values (0.30 [+ or -] 0.21 kN), which were statistically different (p < 0.05) from those of the other groups (GI, GII, GIV and GV).
He said some bleaching creams contained harmful chemical elements such as mercury, hydroquinone, niacin amide, topical retinoid and steroid among several others that were very harmful to the body.
Morphological changes can be found on enamel surfaces using Scanning Electron Microscope such as enamel surface irregularities, loss of aprismatic enamel layer, depression, porosity, crater, erosion, and groove on enamel due to bleaching material.
He said these parents rather than caution their children against the use of bleaching creams 'are the ones who encourage them''.
Bleaching occurs when abnormal environmental conditions, such as warmer sea temperatures, cause corals to expel tiny photosynthetic algae, draining them of their color.
Three techniques were described through the literature: the walking bleach technique, the inside/outside bleach technique and the in-office bleaching procedure.
The algae is also what gives corals their color, which is why when corals lose their algae and turn white it's called a bleaching event.
Both bleaching systems significantly reduced microhardness of both composite groups.
The eight-day time-lapse video, which has gone viral on the Internet, brings coral to life for viewers who may be more accustomed to thinking about reefs as habitats rather than animals and bleaching as a passive event.
With the organIQ BLEACH system, the first purely organic bleaching system for denim fabrics, jeans bleaching becomes innovative.