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. 2020 Jan 14;9(3):e976. doi: 10.1002/mbo3.976

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© 2020 The Authors. MicrobiologyOpen published by John Wiley & Sons Ltd.

This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Determination of antiureolytic properties using M9U and the urease activity assay. Effects of the urease inhibitors hydroxyurea, NBPT, and PPDA on Kebsiella pneumoniae and cell‐free urease activity. (a) final optical cell density of K. pneumoniae (final OD₆₃₀). (b) the final absorbance related to pH value (A557–A630) of the culture caused by K. pneumoniae. (c) the final absorbance related to pH value (A557–A630) caused by jack bean urease. Complete graphs from the experiments can be found in Appendix 4; Figures A4, A5, A6