Comparative-study-of-pectinase-production-by-Enterobacter-aerogenes-NBO2-in-a-shake-flask-and-5-L-stirred-tank-fermenter Comparative-study-of-pectinase-production-by-Enterobacter-aerogenes-NBO2-in-a-shake-flask-and-5-L-stirred-tank-fermenter