Small molecular weight organic compounds

Mycosporine-like Amino Acids (MAA) Small molecular weight organic compounds that absorb UV light and are thought to function as natural sunscreens. 

Combinatorial synthesis of small-molecular-weight organic compounds F. Balkenhohl, C. von dem Bussche-Hunnefeld, A. Lansky, C. Zechel, Angew. Chem. 1996,108, 2436. 

Name the repeating unit and add parentheses according to the nomenclature rule of small molecular weight organic compound. 

A high molecular weight organic compound, natural or synthetic, whose structure can be represented by a repeated small unit, the monomer (e.g., polyethylene, isoprene and cellulose). Synthetic polymers are formed by the addition or condensation polymerization of monomers. If two or more different monomers are involved, a copolymer is obtained. Some polymers can be rubbers and some can be plastics. Plastics which are also high polymers can include both natural, or synthetic products but exclude rubber whether natural or synthetic. At some stage in its manufacture every plastic is capable of flowing under heat and pressure into the desired final shape. 

The haze which can be seen in fair weather is mainly due to submicron ammonium sulphate particles. This aerosol also contains soot, agglomerates of very small carbon particles with adsorbed high molecular weight organic compounds and appreciable amounts of certain trace elements, e.g. lead, zinc, iron, nickel, cadmium etc. 

Vitamins are low molecular weight organic compounds required in small amounts in the diet. Most of the vitamins are not synthesized in the human body but are synthesized by the plants. Hence these essential nutrients are mainly obtained through the food. Though most of them are present in the diet as such, some are present as precursors known as provitamins. 

Scully, F. E. Jr., Howell, R. D., Penn, H. H., Mazina, E., and Johnson, J. D., Small molecular weight organic amino nitrogen compounds in treated municipal wastewater. Environ. Sci. TechnoL, 22, 1186-1190, 1988. 

Polymer. A high molecular weight organic compound, natural or synthetic, whose structure can be represented by a repeated small unit, the monomer. Synthetic polymers are formed by addition or condensation polymerization of monomers. When two or more monomers are involved, the product is called a copolymer. 

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