Characterization of xanthans from selected Xanthomonas strains cultivated under constant dissolved oxygen
Por:
Sánchez A., Ramírez M.E., Torres L.G., Galindo E.
Publicada:
1 ene 1997
Resumen:
Seventeen wild-type Xanthomonas isolates were screened in terms of broth viscosity in shake-flasks. As culture conditions affect polymer characteristics, a fair comparison among isolates required their cultivation in a fermenter under controlled dissolved oxygen tension. Three isolates and a reference strain were studied. The mean molecular weights and molecular weight distributions of their xanthans were determined. Products showed different pyruvate (0.2-7%), acetate (5-10%) and proteinaceous nitrogen (1-3%) contents. The selected isolates exhibit properties which could improve xanthan gum production and some could be used to produce polymers with specific characteristics.
Filiaciones:
Sánchez A.:
Depto. de Bioingenieria, Institute de Biotecnología, Univ. Nac. Auton. de México, Apdo. Post. 510-3, Cuernavaca, Morelos 62250, Mexico
Ramírez M.E.:
Depto. de Bioingenieria, Institute de Biotecnología, Univ. Nac. Auton. de México, Apdo. Post. 510-3, Cuernavaca, Morelos 62250, Mexico
Instituto de Ecologia, Apdo. Postal 63, Xalapa, Veracruz 91000, Mexico
Torres L.G.:
Depto. de Bioingenieria, Institute de Biotecnología, Univ. Nac. Auton. de México, Apdo. Post. 510-3, Cuernavaca, Morelos 62250, Mexico
Coordinacin de Ingenieri Ambiental, Instituto de Ingeniería, UNAM, Apdo. Postal 70-472, Coyoacan Mexico 04510 D.F., Mexico
Galindo E.:
Depto. de Bioingenieria, Institute de Biotecnología, Univ. Nac. Auton. de México, Apdo. Post. 510-3, Cuernavaca, Morelos 62250, Mexico
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