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. 2011 Dec 14;5(1):34–44. doi: 10.1111/j.1751-7915.2011.00285.x

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Copyright © 2011 The Authors. Microbial Biotechnology © 2011 Society for Applied Microbiology and Blackwell Publishing Ltd

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Changes in concentrations of soluble zinc (◆), iron (▾), aluminium (▵) and manganese (○), and numbers of planktonic‐phase bacteria () in bioreactor I during the second phase of operation. The feed liquor was a synthetic mine water based on the chemical composition of a stream draining the abandoned Mynydd Parys copper mine in north Wales. The arrows indicate the points at which: (a) the glycerol concentration in the feed liquor was lowered from 3 mM to 0.7 mM; (b) the yeast extract concentration was lowered from 0.01% to 0.005% (w/v); (c) the ferrous iron was increased from 5 mM to 10 mM.

Inline graphic — Changes in concentrations of soluble zinc (◆), iron (▾), aluminium (▵) and manganese (○), and numbers of planktonic‐phase bacteria () in bioreactor I during the second phase of operation. The feed liquor was a synthetic mine water based on the chemical composition of a stream draining the abandoned Mynydd Parys copper mine in north Wales. The arrows indicate the points at which: (a) the glycerol concentration in the feed liquor was lowered from 3 mM to 0.7 mM; (b) the yeast extract concentration was lowered from 0.01% to 0.005% (w/v); (c) the ferrous iron was increased from 5 mM to 10 mM.