Data Views Exclude Ubiquitous Chemicals Activities: 670 Chemicals w/Activities: 182 CSV Excel PDF All Chemicals: 252 Previous12345678910 Show all rows. Paginate rows. Click on column headings to sort table by that column # Activity Chemical Part All Bud Flower Leaf Plant Seed Stem Tissue Culture Low PPM High PPM StdDev *Reference 77 77 ZINC Leaf 4.0 118.0 0.2 * 77 77 ZINC Flower 3.0 97.0 3.06 * *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.