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. Author manuscript; available in PMC: 2016 May 7.
Published in final edited form as: J Mater Chem B. 2015 Mar 25;3(17):3625–3633. doi: 10.1039/C5TB00421G

Fig. 4.

Fig. 4

(a) Measured pressure drop increase and (b) estimated porosity decrease as a function of culture time. The average pressure drop values in (a) and Eqs. 3 and 4 were used to estimate the porosity values in (b). *P<0.05