caa a22 4500 46582305X CHVBK 20180323112141.0 cr unu---uuuuu 170327e19901201xx s 000 0 eng 10.1007/BF00170066 doi (NATIONALLICENCE)springer-10.1007/BF00170066 Studies on exopolysaccharide release by diazotrophic batch cultures of Cyanospira capsulata [Elektronische Daten] [Massimo Vincenzini, Roberto De Philippis, Claudio Sili, Riccardo Materassi] Summary: Diazotrophic batch cultures of Cyanospira capsulata producing large amounts of a soluble exopolysaccharide (EPS) were studied over a period of about 30 days under continuous illumination. The thickness of the capsule surrounding the trichomes remained almost the same throughout the growth phases and the EPS was continuously released into the medium at a rate which was roughly constant throughout the culture period. A mean EPS productivity of about 6 g m−2 day−1 was attained. Purified EPS samples exhibited a saccharidic composition consisting of four neutral sugars (glucose, mannose, fucose and arabinose) and galacturonic acid in a molar ratio of 1:1:1:1:2, respectively. The EPS was also characterized by the presence of pyruvic residues and by a protein content of about 2%. O-Acetyl groups and sulphate residues were not detected. The massive release of this polysaccharidic material into the liquid medium made the cultures progressively more viscous. Springer-Verlag, 1990 Vincenzini Massimo Dipartimento di Scienze e Tecnologie Alimentari e Microbiologiche, Università, and Centro di Studio dei Microrganismi Autotrofi, CNR. P. le delle Cascine, 27, I 50144, Florence, Italy aut De Philippis Roberto Dipartimento di Scienze e Tecnologie Alimentari e Microbiologiche, Università, and Centro di Studio dei Microrganismi Autotrofi, CNR. P. le delle Cascine, 27, I 50144, Florence, Italy aut Sili Claudio Dipartimento di Scienze e Tecnologie Alimentari e Microbiologiche, Università, and Centro di Studio dei Microrganismi Autotrofi, CNR. P. le delle Cascine, 27, I 50144, Florence, Italy aut Materassi Riccardo Dipartimento di Scienze e Tecnologie Alimentari e Microbiologiche, Università, and Centro di Studio dei Microrganismi Autotrofi, CNR. P. le delle Cascine, 27, I 50144, Florence, Italy aut Applied Microbiology and Biotechnology Springer-Verlag 34/3(1990-12-01), 392-396 0175-7598 34:3<392 1990 34 253 https://doi.org/10.1007/BF00170066 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00170066 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Vincenzini Massimo Dipartimento di Scienze e Tecnologie Alimentari e Microbiologiche, Università, and Centro di Studio dei Microrganismi Autotrofi, CNR. P. le delle Cascine, 27, I 50144, Florence, Italy aut NATIONALLICENCE 700 1- De Philippis Roberto Dipartimento di Scienze e Tecnologie Alimentari e Microbiologiche, Università, and Centro di Studio dei Microrganismi Autotrofi, CNR. P. le delle Cascine, 27, I 50144, Florence, Italy aut NATIONALLICENCE 700 1- Sili Claudio Dipartimento di Scienze e Tecnologie Alimentari e Microbiologiche, Università, and Centro di Studio dei Microrganismi Autotrofi, CNR. P. le delle Cascine, 27, I 50144, Florence, Italy aut NATIONALLICENCE 700 1- Materassi Riccardo Dipartimento di Scienze e Tecnologie Alimentari e Microbiologiche, Università, and Centro di Studio dei Microrganismi Autotrofi, CNR. P. le delle Cascine, 27, I 50144, Florence, Italy aut NATIONALLICENCE 773 0- Applied Microbiology and Biotechnology Springer-Verlag 34/3(1990-12-01), 392-396 0175-7598 34:3<392 1990 34 253 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer