99.99+% – refers to a level of purity called “four nines” pure, but is written as a percentage figure. It is the
same as .9999+ purity.
Au – the chemical symbol for silver derived from the Latin word for gold, aurum.
Anion – an atom with an extra valence electron – giving it a negative charge such as Cl –
Bio-available – refers to whether or not an atom, group of atoms or molecule is in a form that can be
adsorbed by, and used by, a biological entity such as a human being.
Bio-availability – see “Bio-available”
Cation – an atom with a missing valence electron – giving it a positive charge such as Au+
Colloid – a substance microscopically dispersed evenly throughout another substance 1
Gold – a metallic chemical element with the symbol Au (Latin: aurum “gold”)and atomic number of 79. Gold
is a dense, soft, shiny, malleable and ductile metal. Pure gold has a bright yellow color and luster
traditionally considered attractive, which it maintains without oxidizing in air or water.
Nanoparticle – A nanoparticle (or nanopowder or nanocluster or nanocrystal) is a microscopic particle with
at least one dimension less than 100 nm
Tyndall Effect – also known as Tyndall scattering, is light scattering by particles in a colloid or particles in
a fine suspension. It is named after the 19th century physicist John Tyndall. It is similar to Rayleigh
scattering, in that the intensity of the scattered light depends on the fourth power of the frequency, so blue
light is scattered much more strongly than red light 1
1 – Wikipedia March 10, 2012