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MORTHON, L. H. G.; GAYLARDE, C. C. Microorganisms and their effects on durability of constructional materials. In: SEMINÁRIO INTERNACIONAL DE DURABILIDADE DE MATERIAIS, COMPONENTES E ESTRUTURAS, 3., 1997, São Paulo. Anais… São Paulo: IBRACON, 1997. p.01-08.
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Abstract

The weathering of building materials is accelerated by a superficial layer of microorganisms, called a biofilm. This contains active and inactive microorganisms and products of their metabolism, such as acids and polymers produced by the microbial cells. These polymers, known as EPS (exopolymeric substances) act as glues, trapping dust and other particulate materials. The activity of microorganisms in biofilms is often intense and can lead to rapid deterioration of materials.
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