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photochemistry

(Encyclopedia)photochemistry, study of chemical processes that are accompanied by or catalyzed by the emission or absorption of visible light or ultraviolet radiation. A molecule in its ground (unexcited) state can...

Lippman, Gabriel Jonas

(Encyclopedia)Lippman, Gabriel Jonas, 1845–1921, French physicist, Ph.D. Sorbonne, 1875. He was a professor at the Sorbonne from 1883 until his death in 1921. Lippman received the 1908 Nobel Prize in Physics for ...

bead test

(Encyclopedia)bead test, test used in the identification of certain metals. Some metallic ions that cannot be identified by a flame test are identified by a bead test. The test can also be used to confirm the resul...

olivine

(Encyclopedia)olivine ŏlĭvˈēn [key], an iron-magnesium silicate mineral, (Mg,Fe)2SiO4, crystallizing in the orthorhombic system. It is a common constituent of magnesium-rich, silica-poor igneous rocks; metamorp...

Tibetan terrier

(Encyclopedia)Tibetan terrier, breed of medium-sized dog originating in Tibet probably several thousand years ago. It stands from 14 to 16 in. (35.6–40.6 cm) high at the shoulder and weighs from 15 to 30 lb (6.8�...

Diebenkorn, Richard

(Encyclopedia)Diebenkorn, Richard, 1922–93, American painter, b. Portland, Oreg. Raised in California, he studied at Stanford and at a collector's home encountered (1943) the work of Matisse, whose bold use of co...

chlorophyll

(Encyclopedia)CE5 chlorophyll klôrˈəfĭlˌ [key], green pigment that gives most plants their color and enables them to carry on the process of photosynthesis. Chemically, chlorophyll has several similar forms...

Ives, Frederic Eugene

(Encyclopedia)Ives, Frederic Eugene, 1856–1937, American inventor, b. Litchfield, Conn. A pioneer in the development of orthochromatic and trichromatic photography and of photoengraving, he followed an earlier su...

Harunobu

(Encyclopedia)Harunobu (Suzuki Harunobu) so͞ozo͞oˈkē häro͞oˈnōˈbo͞o [key], 1724–70, Japanese color-print artist of the ukiyo-e school. He was the first to use a wide range of colors effectively in print...

Jones, Robert Edmond

(Encyclopedia)Jones, Robert Edmond, 1887–1954, American scene designer, b. Milton, N.H. With his design in 1915 for The Man Who Married a Dumb Wife, a new era of scene design began in the United States. His use o...