Data Views Exclude Ubiquitous Chemicals Activities: 550 Chemicals w/Activities: 81 CSV Excel PDF All Chemicals: 144 Show All Paginate Previous12345 Click on column headings to sort the list on the column # Activity Chemical Part All parts ... Leaf Plant Root Root Essent. Oil Stem Pt Low PPM High PPM StdDev *Reference 77 77 ZINC Pt 1.0 46.0 * *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.