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. 2019 Nov 28;104(1):131–144. doi: 10.1007/s00253-019-10242-1

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© The Author(s) 2019

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. 1 — Liquid nitrogen (LN) storage tanks and sampling procedure of LN and ice. (a) Sampling of the LN phase using a reaction tube and grip tongs. (b) Sampling of the ice phase formed underneath the lids (and rim)