Data Views Exclude Ubiquitous Chemicals Activities: 671 Chemicals w/Activities: 121 CSV Excel PDF All Chemicals: 193 Show All Paginate Previous1234567 Click on column headings to sort the list on the column # Activity Chemical Part All parts ... Essential Oil Leaf Plant Root Root Essent. Oil Seed Sprout Seedling Low PPM High PPM StdDev *Reference 77 77 ZINC Root 3.0 70.0 2.01 * *Unless otherwise noted all references are to Duke, James A. 1992. Handbook of phytochemical constituents of GRAS herbs and other economic plants. Boca Raton, FL. CRC Press.