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. 2013 Sep 2;3:2563. doi: 10.1038/srep02563

Figure 2. Olfactory test block showing 2 × 5 cm triple layered corrugated cardboard block into which a 0.5 g sterile agar plug could be added to the flute.

Figure 2

An aliquot of 8 μl bacteria in PBS at the desired concentration could then be added onto the top of plug.