In chemistry, an oligomer consists of a finite number of monomer units ("oligo" is Greek for "a few"), in contrast to a polymer which, at least in principle, consists of an infinite number of monomers. Chemistry (in Greek: χημεία) is the science of matter that deals with the composition, structure, and properties of substances and with the transformations that they undergo. ... In chemistry, a monomer (from Greek mono one and meros part) is a small molecule that may become chemically bonded to other monomers to form a polymer. ... A polymer is a generic term used to describe a substantially long molecule. ...
In biochemistry, the term oligomer is used for short, single stranded DNA fragments, generally used in hybridization experiments (bound to glass slides or nylon membranes). It can also refer to a protein complex made of two or more subunits. In this case, a complex made of several different protein subunits is called a hetero-oligomer. When only one type of protein subunit is used in the complex, it is called homo-oligomer. Biochemistry is the chemistry of life. ... Space-filling model of a section of DNA molecule Deoxyribonucleic acid (DNA)nucleic acid that contains the genetic instructions specifying the biological development of all cellular forms of life (and many viruses). ... A protein complex is a group of two or more associated proteins. ... In structural biology, a protein subunit or subunit protein is a single protein molecule that assembles (or coassembles) with other protein molecules to form a multimeric or oligomeric protein. ... A representation of the 3D structure of myoglobin, showing coloured alpha helices. ... A representation of the 3D structure of myoglobin, showing coloured alpha helices. ...
(see also: quaternary structure) In biochemistry, many proteins are actually assemblies of more than one protein (polypeptide) molecule, which in the context of the larger assemblage are known as protein subunits. ...
This method for the production of difurfurylideneacetone oligomer is commercially realized; however, at the final stage the process of oligomerization of difurfurylideneacetone in the presence of an acid catalyst occurs but with a very high speed which hinders the possibility of determination of the degree of readiness of the oligomer.
The oligomer with the required properties has a life time of several minutes only (5-15 minutes), during which period it is impossible to determine its dropping point due to a long time required for the analysis.
This oligomer, when mixed with graphite in the manufacture of graphitized plastics, should be subjected to rolling for a period of 5 to 8 minutes.
The oligomer porphyrin system, based on 5,10,15,20-tetrakis(3,5-di-tert-butylphenyl)porphyrin in which the porphyrin rings are bridged by coplanar aromatic systems and the ends are capped with phenanthroline, is proposed to meet all the criteria for a molecular wire.
This oligomer porphyrin system has a fully conjugated *-electron conduction pathway which is surrounded by a sheath of bulky insulating lipophilic alkyl groups that will act to minimise random conduction, such as electrostatic interactions and electron tunnelling, and improve solubility.
An outline of the synthesis of the oligomer porphyrin systems from various building blocks is presented, along with general protocols for the synthesis of oligomer porphyrin systems of varying lengths.
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