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biomimetics Biomimetic chemistry is the field of experimental simulation or modelling of biological simulations in which chemists try to mimic the complex systems found in nature using less complicated artificial systems chiral Possessing 'handedness'; that is, existing in right- and left-handed forms. Chiral molecules are not superimposable on their mirror images colloid Colloidal systems are stable dispersions of microscopic solid particles (ca. 1µm) in fluids enantiomer Two stereoisomers which differ only in the direction in which they rotate polarised light functional material Functional materials have an in-built special effect with physical responses to external forces, for instance light emission on the application of pressure. Compare with structural material heterogenous catalysis In heterogenous catalysis, the reagents combine and transform at the interface between the gas or liquid and the surface of the catalyst. Compare with homogenous catalysis homogenous catalysis In homogenous catalysis, the catalysts is dissolved in a liquid. Compare with heterogenous catalysis mesoporous solid New robust solid with hollow channels, the dimensions of which can be controlled in the molecular assembly process,with many uses in heterogeneous catalysis receptor A tissue or cell which is sensitive to a specific stimulus stereoisomer Stereoisomers are molecules which differ only in the three-dimensional arrangement of their constituent atoms stereoselectivity Processes which are able to distinguish between stereoisomers are said to be stereospecific stratosphere That portion of the atmosphere above the troposphere structural material Structural materials are essentially substances designed to have specific structural purposes for construction. Compare with functional material troposphere The layer of atmospheric air extending upwards about 11 km (seven miles) from the surface of the earth; essentially, the air we breathe A NOTE ON SIZES When discussing units of length, micrometres and nanometres are now used in preference to microns and angstroms. One angstrom (1Å) is equal to 0.1 nanometre. micrometre - Formerly called a micron, and equivalent to 1x10-6 of a metre. Abbreviated µm. nanometre - 1x10-9 of a metre. Abbreviated nm. |