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Index (B)
BA - BC
BD - BF
BG - BJ
BK - BN
BO - BO
BP - BR
BS - BV
BW - BZ
Moment of truth
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The word 'nanotechnology' is first coined by University of Tokyo researcher Norio Taniguchi back in 1974. |
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BD - BF
becquerel Metro.
An SI unit that is used in nuclear physics to measure the activity (number of disintegrations per second) of a radioactive source. It has a symbel Bq and named after Antoine H. Becquerel (1852-1908). 1 Bq = one disintegration per second. However,
the measurement does not contain information about the nature of the radioactive source, nor the types of radiation. See also curie
bel Elec.
A unit measure of ratios of power levels, use in acoustic, electronic and telecommunications. It was first coined in the early 20th century in honour of Alexandra Graham Bell, the inventor of telephone. The bel is a base-10 logarithmic measure.
It is more commonly describe is decibels (dB) where 1 bel = 10 dB.
Benedict's reagent Chem., Biochem.
A reagent that is used to test for the presence of reducing sugar. The reagent is prepared by adding copper(II) sulfate to a solution mixture of sodium citrate and anhydroups sodium carbonate. A test solution is then added to the reagent and boil.
A red-brick precipitate of copper(I) oxide will form if the test solution contains reducing sugars such as fructose and glucose.
beneficiation Min. Ext.
A process of separating ore into the valuable components and the waste component. The former component is then ready for further refining such as smelting. The process is also called ore dressing or mineral dressing. This may achieve by
several process, depending on the type and nature of ore, such as crushing, grinding, froth flotation and even magnetic separation.
beta decay Phys.
Radiation involves emission of an electron and an antineutrino by change (decay) of a neutron into a proton at the atomic nucleus.
The decay process conserves the electron charge and lepton number.
BD - BF
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B
C
D
E
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G
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I
J
K
L
M
N
O
P
Q
R
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T
U
V
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X
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