caa a22 4500 475783638 CHVBK 20180406123651.0 cr unu---uuuuu 170329e20001001xx s 000 0 eng 10.1023/A:1008161815801 doi (NATIONALLICENCE)springer-10.1023/A:1008161815801 Assessment of the potential of Nostoc strains from the Pasteur Culture Collection for the production of polysaccharides of applied interest [Elektronische Daten] [Roberto De Philippis, Alba Ena, Raffaella Paperi, Claudio Sili, Massimo Vincenzini] The exocellular polysaccharides released during thephotoautotrophic growth by 25 Nostoc strainsbelonging to the Pasteur Culture Collection (PCC) wereinvestigated with regard to their chemical andrheological properties in order to assess theirpotential for the production of polysaccharides ofindustrial interest.All the released polysaccharides (RPSs) were complexanionic heteropolymers, composed of a number ofmonosaccharides ranging from six to nine, alwaysincluding glucose and fucose, and most frequentlygalactose. Ribose, rarely reported to be present incyanobacterial RPSs, was found in seven polymers. TheRPSs were shown to possess an anionic charge due tothe presence of uronic acids and in most cases also ofpyruvil and sulphate groups. Moreover, a large numberof polymers showed the presence of significant amountsof constituents such as acetyl groups, peptidicmoieties and deoxysugars, that may contribute to thehydrophobicity of the macromolecules. The viscositydependence on the shear rate of aqueous solutions ofthe RPSs was, in three cases, comparable with that ofxanthan gum, and one RPS showed a very satisfactorystability of the viscosity over a wide range of pH,temperature and salinity values. The most promisingPCC Nostoc strains for the production of RPSsfor specific applications were thus singled out, basedon the characteristics of their polymers. Kluwer Academic Publishers, 2000 released polysaccharides nationallicence Nostoc nationallicence cyanobacteria nationallicence Pasteur Culture Collection nationallicence chemical composition nationallicence flow properties nationallicence bioemulsifiers nationallicence chelating agents nationallicence thickening agents nationallicence De Philippis Roberto Dipartimento di Biotecnologie Agrarie, Universita' degli Studi di Firenze, and Centro di Studio dei Microrganismi Autotrofi, CNR, Piazzale delle Cascine 27, I-50144, Firenze, Italy aut Ena Alba Dipartimento di Biotecnologie Agrarie, Universita' degli Studi di Firenze, and Centro di Studio dei Microrganismi Autotrofi, CNR, Piazzale delle Cascine 27, I-50144, Firenze, Italy aut Paperi Raffaella Dipartimento di Biotecnologie Agrarie, Universita' degli Studi di Firenze, and Centro di Studio dei Microrganismi Autotrofi, CNR, Piazzale delle Cascine 27, I-50144, Firenze, Italy aut Sili Claudio Dipartimento di Biotecnologie Agrarie, Universita' degli Studi di Firenze, and Centro di Studio dei Microrganismi Autotrofi, CNR, Piazzale delle Cascine 27, I-50144, Firenze, Italy aut Vincenzini Massimo Dipartimento di Biotecnologie Agrarie, Universita' degli Studi di Firenze, and Centro di Studio dei Microrganismi Autotrofi, CNR, Piazzale delle Cascine 27, I-50144, Firenze, Italy aut Journal of Applied Phycology Kluwer Academic Publishers 12/3-5(2000-10-01), 401-407 0921-8971 12:3-5<401 2000 12 10811 https://doi.org/10.1023/A:1008161815801 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1008161815801 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- De Philippis Roberto Dipartimento di Biotecnologie Agrarie, Universita' degli Studi di Firenze, and Centro di Studio dei Microrganismi Autotrofi, CNR, Piazzale delle Cascine 27, I-50144, Firenze, Italy aut NATIONALLICENCE 700 1- Ena Alba Dipartimento di Biotecnologie Agrarie, Universita' degli Studi di Firenze, and Centro di Studio dei Microrganismi Autotrofi, CNR, Piazzale delle Cascine 27, I-50144, Firenze, Italy aut NATIONALLICENCE 700 1- Paperi Raffaella Dipartimento di Biotecnologie Agrarie, Universita' degli Studi di Firenze, and Centro di Studio dei Microrganismi Autotrofi, CNR, Piazzale delle Cascine 27, I-50144, Firenze, Italy aut NATIONALLICENCE 700 1- Sili Claudio Dipartimento di Biotecnologie Agrarie, Universita' degli Studi di Firenze, and Centro di Studio dei Microrganismi Autotrofi, CNR, Piazzale delle Cascine 27, I-50144, Firenze, Italy aut NATIONALLICENCE 700 1- Vincenzini Massimo Dipartimento di Biotecnologie Agrarie, Universita' degli Studi di Firenze, and Centro di Studio dei Microrganismi Autotrofi, CNR, Piazzale delle Cascine 27, I-50144, Firenze, Italy aut NATIONALLICENCE 773 0- Journal of Applied Phycology Kluwer Academic Publishers 12/3-5(2000-10-01), 401-407 0921-8971 12:3-5<401 2000 12 10811 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer