Data Views Exclude Ubiquitous Chemicals Activities: 285 Chemicals w/Activities: 16 All Chemicals: 22 CSV Excel PDF Previous12 Show all rows. Paginate rows. Click on column headings to sort table by that column # Activity Chemical Part All Plant Low PPM High PPM StdDev *Reference 0 THIAMINE Plant -- 51.0 2.34 * 77 77 ZINC Plant -- 5.3 -0.46 * *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.