bleaching-matter
51Walter Crum — Retrato de Walter Crum (1796 1867) Nacimiento 1796 Glasgow, Escocia Fallecimiento …
52Boron — (pronEng|ˈbɔərɒn) is a chemical element with atomic number 5 and the chemical symbol B. Boron is a trivalent nonmetallic element which occurs abundantly in the evaporite ores borax and ulexite. Boron is never found as a free element on… …
53Halogen — The halogens or halogen elements are a series of nonmetal elements from Group 17 IUPAC Style (formerly: VII, VIIA, or Group 7) of the periodic table, comprising fluorine, F; chlorine, Cl; bromine, Br; iodine, I; and astatine, At. The undiscovered …
54Sulfur — This article is about the chemical element. For other uses, see Sulfur (disambiguation). phosphorus ← sulfur → chlorine …
55Symbiosis — Symbiology redirects here. For use of things that represent other things by association, resemblance, or convention, see Symbology. This article is about the biological phenomenon. For other uses, see Symbiosis (disambiguation). For the Marvel… …
56Winemaking — Wine grapes. Winemaking, or vinification, is the production of wine, starting with selection of the grapes or other produce and ending with bottling the finished wine. Although most wine is made from grapes, it may also be made from other fruit… …
57Peter Williamson — (1730 ndash;1799), or Indian Peter as he became known, was one of the more colourful personalities of 18th century Scotland. He was kidnapped and sold into slavery in America. He was captured by Indians, but eventually escaped and joined the… …
58Preservation (library and archival science) — Preservation is a branch of library and information science concerned with maintaining or restoring access to artifacts, documents and records through the study, diagnosis, treatment and prevention of decay and damage. [cite web… …
59catalysis — catalytic /kat l it ik/, adj., n. catalytical, adj. catalytically, adv. /keuh tal euh sis/, n., pl. catalyses / seez /. 1. Chem. the causing or accelerating of a chemical change by the addition of a catalyst. 2. an action between two or more… …
60global warming — an increase in the earth s average atmospheric temperature that causes corresponding changes in climate and that may result from the greenhouse effect. [1975 80] * * * Potential increase in global average surface temperatures resulting from… …
