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. 2017 Jun 10;29(6):2925–2936. doi: 10.1007/s10811-017-1157-8

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© The Author(s) 2017

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 5 — The temporal removal of nitrate from the media by C. coelothrix (a), C. parriaudii (b), and S. varians (c, d). Their growth was assessed periodically using different protocols: beaker (B), beaker + reticulated spinner (B+RS), beaker + filter paper (B+FP), beaker + reticulated spinner + filter paper (B+RS+FP), beaker + cavity microscope slide (B+MS), perforated crucible + reticulated spinner (PC+RS), and perforated crucible (PC) (Table 1). Nitrate was measured in the media using ion chromatography (n = 3, [except S. varians “+ C” where n = 8] error bars denote 1 SD)