The second set included investigating
the effect of adding two concentrations of 50 or 100mg L−1 of
thymol (Sigma Company), carvacrol (Merck Company), thyme oil
or zataria oil (Zardband Company, Iran) and two concentrations
of 1 or 2mgL−1 SNP into preservative solutions containing 6% of
sucrose. In both experiments distilled water was used as a control