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valine

(Encyclopedia) CE5 valinevalinevălˈēn [key], organic compound, one of the 22 α-amino acids commonly found in animal proteins. Only the l-stereoisomer appears in mammalian protein. It is one of…

refining

(Encyclopedia) refining, any of various processes for separating impurities from crude or semifinished materials. It includes the finer processes of metallurgy, the fractional distillation of…

Phyfe, Duncan

(Encyclopedia) Phyfe, DuncanPhyfe, Duncanfīf [key], c.1768–1854, American cabinetmaker, b. Scotland. He emigrated to America c.1783, settling at Albany, N.Y., where he was apprenticed to a…

sap

(Encyclopedia) sap, fluid in plants consisting of water and dissolved substances. Cell sap refers to this fluid present in the large vacuole, or cell cavity, that occupies most of the central portion…

isoleucine

(Encyclopedia) CE5 isoleucineisoleucineīˌsəl&oomacr;ˈsēn [key], organic compound, one of the 20 amino acids commonly found in animal proteins. Only the l-stereoisomer appears in mammalian…

Tiffany Trump

Tiffany Trump is the youngest daughter of former U.S. President Donald Trump. She is Trump’s daughter with his second wife, Marla Maples. Maples and Donald Trump had an affair while he was still…

Joplin, Scott

(Encyclopedia) Joplin, ScottJoplin, Scottjŏpˈlĭn [key], 1868–1917, American ragtime pianist and composer, b. Texarkana, Tex. Self-taught, Joplin left home in his early teens to seek his fortune in…