By Andrew M. Smith
Many vegetation, animals, and microbes use adhesive polymers and buildings to connect to inert substrates, to one another, or to different organisms. this is often the 1st significant overview that brings jointly learn on some of the recognized organic adhesives. Emphasizing the range of organic adhesives and linked adhesion tactics, it offers with micro organism, fungi, algae, and marine and terrestrial animals. It bridges a number of disciplines together with biochemistry, molecular biology, biomechanics, bioengineering, microbiology, organism constitution and serve as, and ultrastructure. As we study extra concerning the molecular and mechanical houses of those adhesives, we commence to appreciate why they adhere so good and the way they advance cohesive energy. With this figuring out comes the possibility of constructing artificial or semi-synthetic adhesives with vast functions in components resembling medication, dentistry, and biotechnology. The ebook is appropriate for either business and educational researchers.
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15:189–195 Yamada K, Chen T, Kumar G, Vesnovsky O, Topoleski LDT, Payne GF (2000) Chitosan based water-resistant adhesive. Analogy to mussel glue. 1 Biofilm Formation and its Regulation In natural habitats, microorganisms are often found attached to solid surfaces and organized in structured communities known as biofilms. Such communities are characterized by the presence of a large number of different bacterial species, usually associated with eukaryotic microorganisms, typically in close contact with a surface, either organic or abiotic.
In Yersinia pestis the expression of the haemin storage system (hms) and biofilm formation is dependent on the GGDEF containing HmsT protein (Hare and McDonough 1999; Jones et al. 1999). A hms-homolog system has recently been identified The Molecular Genetics of Bioadhesion and Biofilm Formation 35 in E. coli and termed pga; the pga locus is responsible for production of an N-acetyl-glucosamine polymer, and includes a GGDEF protein-encoding gene (ycdT), which, however, does not appear to be directly involved in regulation of polysaccharide production (Wang et al.
Aeruginosa is repressed in biofilms, and rpoS-deficient mutants not only formed better biofilms than wild type cells but were more resistant to antimicrobial treatment (Whiteley et al. 2001). Consistent with a possible negative role of RpoS in biofilm formation are the observations that rpoS negatively affects expression of Type 1 fimbriae in E. coli, also factors for biofilm formation (Dove et al. 1997). Thus, it is possible that RpoS can play both a negative and a positive role in biofilm formation depending on biofilm determinant and growth or environmental conditions.
Biological adhesives by Andrew M. Smith