Fungal cultures of tar bush and creosote bush for production of two phenolic antioxidants (Pyrocatechol and Gallic acid) |
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Authors: | J Ventura G Gutiérrez-Sanchez R Rodríguez-Herrera C N Aguilar |
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Institution: | (1) Food Research Department, School of Chemistry, Universidad Autónoma de Coahuila, Saltillo, Coahuila, México;(2) Complex Carbohydrate Research Center, The University of Georgia, Athens, GA 30602, USA |
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Abstract: | ‘Tar bush’ and ‘creosote bush’ were substrates of fungal cultivation for tannase production and gallic acid and pyrocatechol
accumulation. Aspergillus niger GH1 grew similarly on both plant materials under solid state culture conditions, reaching maximal levels after 4 d. Fungal
strain degraded all tannin content of creosote bush after 4 d of fermentation and >75 % of tar bush after 5 d. Higher level
of tannase activity was detected in tar bush fermentation. Biotransformation of tannins to gallic acid was high (93 % in creosote
bush and 89 % in tar bush). Pyrocatechol was released poorly. Kinetic parameters of tannin conversion were calculated. |
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