Dictionary of Chemistry [6th Ed.]
B Babbit metalAny of a group of re- lated alloys used for making bear- ings. They consist of tin containing antimony (about 10%) ...
the surface of the earth and in the atmosphere as a result of cosmic radiation and the presence of radio- isotopes in the earth’ ...
the hydrogencarbonate, which make the mixture rise. baking sodaSee sodium hydro- gencarbonate. balanceAn accurate weighing de- v ...
per(II) acetate, is added to the test so- lution and boiled. If any reducing sugars are present a red precipitate of copper(II) ...
used as a bleaching agent. With acids, hydrogen peroxide is formed and the reaction is used in the labo- ratory preparation of h ...
an alkali. Ammonia and sodium hy- droxide are common examples. The original Arrhenius deÜnition of a base has been extended by t ...
the ability to supply 1 A for 1 hr, or the equivalent. bauxiteThe chief ore of alu- minium, consisting of hydrous alu- minium ox ...
the reduction in luminous intensity of light passing through a material to the length of the light’s path through the material: ...
benzenecarbaldehyde 62 b saturated molecule, yet will not read- ily undergo addition reactions. On the other hand, it does under ...
63 benzoylation b benzilic acid rearrangement An organic rearrangement reaction in which benzil(1,2-diphenylethan-1,2- dione) is ...
benzoyl chloride 64 b benzoyl chlorideSee benzenecar- bonyl chloride. benzoylecgonine(BZ)A primary metabolite of cocaine, used i ...
from simple starting materials. Berthelot was also one of theÜrst to investigate thermochemistry. Berthelot equationAn *equation ...
type of *bronze containing about 2% beryllium, in addition to copper and tin. beryllium hydroxide A white crystalline compound, ...
67 binary acid b strate for further adsorption. The BET isotherm (named after S. Brunauer, P. Emmett, and E. Teller) has the for ...
rectly to an atom other than oxygen. Examples are hydrogen chloride (HCl) and hydrogen sulphide (H 2 S). Such compounds are some ...
ergy that occur in living organisms. Typically, the amount of energy that an organism takes in (from food or sunlight) is measur ...
70 b BIOCHEMISTRY 1833 French chemist Anselme Payen (1795–1871) discovers diastase (the first enzyme to be discovered). 1836 The ...
71 1956 US biochemist Arthur Kornberg (1918– ) discovers the enzyme DNA b polymerase. US molecular biologist Paul Berg (1926– ) ...
naturally, such as a *polysaccharide, *protein, or *nucleic acid. bioreactor (industrial fermenter)A large stainless steel tank ...
dissociation of a molecule by extrap- olation from observed band spectra. The dissociation energy D 0 is equal to the sum of the ...
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