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ZJUS-B
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology)  2007, Vol. 8 Issue (10): 771-776    DOI: 10.1631/jzus.2007.B0771
Biotechnology     
Effects of polyurethane matrices on fungal tannase and gallic acid production under solid state culture
TREVIŇO Lucia, CONTRERAS-ESQUIVEL Juan C., RODRÍGUEZ-HERRERA Raul, AGUILAR Cristóbal Noé
Department of Food Research, Autonomous University of Coahuila, Saltillo, Coahuila 25000, Mexico
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Abstract  The influence of the physical structure of polyurethane matrix as a support in a solid state culture in tannase production and gallic acid accumulation by Aspergillus niger Aa-20 was evaluated. Three different polyurethane matrices were used as the support: continuous, semi-discontinuous and discontinuous. The highest tannase production at 2479.59 U/L during the first 12 h of culture was obtained using the discontinuous matrix. The gallic acid was accumulated at 7.64 g/L at the discontinuous matrix. The results show that the discontinuous matrix of polyurethane is better for tannase production and gallic acid accumulation in a solid state culture bioprocess than the continuous and semi-discontinuous matrices.

Key words： Tannase      Gallic acid      Polyurethane matrix support      Solid state culture      Aspergillus niger Aa-20     
Received: 23 July 2007     
CLC:  TS2  
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TREVIŇO Lucia
CONTRERAS-ESQUIVEL Juan C.
RODRÍGUEZ-HERRERA Raul
AGUILAR Cristóbal Noé
Cite this article:

TREVIŇO Lucia, CONTRERAS-ESQUIVEL Juan C., RODRÍGUEZ-HERRERA Raul, AGUILAR Cristóbal Noé. Effects of polyurethane matrices on fungal tannase and gallic acid production under solid state culture. Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology), 2007, 8(10): 771-776.

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http://www.zjujournals.com/xueshu/zjus-b/10.1631/jzus.2007.B0771     OR     http://www.zjujournals.com/xueshu/zjus-b/Y2007/V8/I10/771

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