Produção de Polihidroxibutirato: Bioprospecção de Beijerinckia sp., da coleção de bactérias do Laboratório de Biopolímeros do CDTec - UFPel

• Autor(a) principal: Oliveira, Claudio Fernando de
• Data de Publicação: 2010
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFPel - Guaiaca
• Texto Completo: http://guaiaca.ufpel.edu.br/handle/123456789/1276
• topic: PHB; Bioprospecting; Microscopy; Infrared; PHB; Beijeirinckia sp.; Bioprospecção; Microscopia; Infravermelho; CNPQ::CIENCIAS BIOLOGICAS::MICROBIOLOGIA::BIOLOGIA E FISIOLOGIA DOS MICROORGANISMOS::BACTEROLOGIA

Factors like the frequent worry with the environmental impact cause by the discard of petrochemical plastic waste in the environment due to its low degradability and the constant increase of petrol price took to a world search for innovations with the production of bioplastics. They are the polymers produced by microorganisms from the renewable raw material with properties similar plastic derived from petrol, such as polypropylene and polyethylene. The more promising bioplastics are the polyhydorxyalkanoates, which comprehend a great polyester family accumulated in the form of intracellular granules by microorganisms like bacteria. The most common type is the poli(3 hydroxybutyrate) P(3HB); this polymer brings great interest for being biocompatible, biodegradable and thermoplastic. The objective of this study was to realize a bioprospecting between Beijerinckia sp. strains from the collection of microorganism culture from CDTec UFPel for the selection of possible producer strains of P (3HB). Initially, 7 strains were cultivated in solid mean, YM and YDC, and colored cell with Sudan Black for Optic Microscopy visualization, when 3 strain were selected for further analysis through Transmission Electronic Transmission; the data revealed a strong evidence of granules P(3HB) production by strain C31 in the cellular multiplication phase. The biopolymer production was evaluated in 3 means, the best result was obtained with F4 mean, being a concentration of 0,93 gl of polymer and content of 34%. The polymer was identified, and measured, by Gas Chromatography as P(3HB). The polymer identity was confirmed for Fourier transform infrared spectroscopy (FT-IR). The spectra revealed characteristic bands of P(3HB), confirming the production of this polymer by C31 strain, which was considered with great power for the industrial production