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. 2014 Dec 5;12:50. doi: 10.1186/s12951-014-0050-8

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© Le et al.; licensee BioMed Central. 2014

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Effects of SiO ₂ NPs concentrations on plant height. The value was given as means ± SD. The (*) was represented significant difference (p <0.05) between control and SiO2 NPs treatments at the same cotton, and the (*) above the line segment was represented significant difference (p <0.05) between cultivars at the same SiO₂ NPs concentration.