Colonial cell growth of Dunaliella salina and Platymonas subcordiformis under different inoculation density and nitrogen concentration Effects of temperature and initial inoculation density on root-knot nematode (Meloidogyne incognita) infection ability Effects of several factors on cell growth and ginsenoside accumulation of Panax ginseng suspension culture Effects of Meloidogyne incognita initial inoculation density on ginger growth Proliferation of Adventitious Shoots of Vaccinium uliginosum Using Raft Bioreactors