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
Russell Shank Russell Shank Russell Shank (September 2, 1926 – June 26, 2012) was an American librarian. Shank studied electrical engineering at the University of Washington and earned a bachelor's degree in electrical engineering in 1946. He went on to receive a bachelor's in librarianship in 1949, also from the University of Washington. Shank went on to receive a master's in business administration from the University of Wisconsin and a doctorate in library science from Columbia University. He served as an assistant university librarian at the University of California Berkeley from 1959 to 1964 and was a member of the faculty of