darkening
91Cobalt glass — for decoration Cobalt glass is a deep blue colored glass prepared by adding cobalt compounds to the molten glass. It is appreciated for its attractive color. It is also used as an optical filter in flame tests to filter out the yellow flame… …
92Curse of Ham — Noah damning Ham, 19th century painting by Ivan Stepanovitch Ksenofontov The Curse of Ham is a possible misnomer,[1] for the Curse of Canaan. The curse refers to Noah cursing Ham s offspring Canaan, for Ham s own transgression against his father …
93Ochronosis — Classification and external resources Homogentisic acid ICD 10 E …
94Milk glass — Decorative pedestal milk glass bowl Milk glass is an opaque or translucent,[citation needed] milky white or colored glass, blown or pressed into a wide variety of shapes. First made in Venice in the 16th century, colors include blue, pin …
95Black tiger (animal) — A black tiger is a rare color variant of the tiger and is not a distinct species or geographic subspecies. There are unconfirmed reports and one painting (now lost) of pure black non striped tigers (true melanistic tigers), but no physical… …
96Ocean acidification — Change in sea water acidity pH caused by anthropogenic CO2 between the 1700s and the 1990s Ocean acidification is the name given to the ongoing decrease in the pH and increase in acidity of the Earth …
97Japanese street fashion — Japan began to emulate Western fashion during the middle of the 19th century. By the beginning of the 21st century it had altered into what is known today as Street Fashion. .The term Street Fashion is used to describe fashion where the wearer… …
98Optical fiber — A bundle of optical fibers A TOSLINK fiber optic audio c …
99Skin whitening — The term skin whitening covers a variety of cosmetic methods used to whiten the skin. It is most common in parts of Africa and Asia.Skin lightening or whitening is a controversial topic as it is closely intertwined with the detrimental effects on …
100Optical lens design — refers to the calculation of lens construction parameters (variables) that will meet a set of performance requirements and constraints, including cost and schedule limitations. Construction parameters include surface profile types (spherical,… …
