Lactarius repraesentaneus namely repraesentins B and C. These compounds were shown to promote the radicle elongation of lettuce seedlings by 136%, 118% and 184% at 67 ppm, respectively. Other compounds reported in 2006 are repraesentins D, E, and F. Repraesentin E showed the strongest growth promotion activity, 164% at 3.6 µm, of the three compounds toward the radicle elongation of lettuce seedlings. Lactarius repraesentaneus Lactarius repraesentaneus, commonly known as the northern bearded milkcap, the northern milkcap, or the purple-staining milkcap, is a species of fungus in the Russulaceae family. It has a northerly distribution, and is found in temperate regions of North
Fred Shank Fred Shank Fred Ross Shank II (October 11, 1940 – January 24, 2015) was the Director of the Center for Food Safety and Applied Nutrition of the Food and Drug Administration for nearly ten years before he became Senior Advisor to the Commissioner for External Academic Affairs in January 1998. Before joining FDA in 1978, Shank performed program evaluations and served as a nutrition specialist with the Food and Nutrition Service for domestic food assistance programs at the U.S. Department of Agriculture. Shank earned his doctorate in nutrition at the University of Maryland, College Park. He has authored or co-authored