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. 2018 Aug 7;16(8):277. doi: 10.3390/md16080277

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Anti-cancer activity of CAO-AuNPs to HCT-116 cells by the sulforhodamine B (SRB) assay: (A) morphological alterations in HCT-116 cells incubated at varied concentration of CAO-AuNPs, and cells in red circle represented living cell while cells in blue circle represented apoptotic/dead cells, (i) control, (ii) 25 μg/mL, (iii) 50 μg/mL, (iv) 100 μg/mL, (v) 200 μg/mL and (vi) 400 μg/mL for 72 h (40× Magnification); (B) percentage cell viability of HCT-116 human colon cancer cells after 72 h of treatment with free CAO and CAO-AuNPs (mean ± SD, n = 4).