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. 2019 Mar 11;44(4):267–278. doi: 10.1093/chemse/bjz014

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© The Author(s) 2019. Published by Oxford University Press.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Figure 1. — Odorants were distributed by Scratch and Sniff booklets. (A) The monomolecules used in the study: 10 fixed odorants and 13 rotators (the remaining 12 odorants were mixtures) depicted within the first and second principal components of a representative physicochemical space containing ~1500 odorant molecules. (B) An odorant page from within the booklet. The microencapsulated odorant (in this case; JX) was printed on the entire page. (C) A participant sniffing the booklet. (D) Example of the VAS scale in the webpage.