HPLC Analysis of Resveratrol and Piceid during the Development of Grape Berries Synthesis of Resveratrol and Piceid in Different Grape Organs in Response to UV-C Irradiation Synthesis of Resveratrol and Piceid in Different Grape Organs in Response to UV-C Irradiation Effects of Storage Temperature on Resveratrol and Its Glycosides Content in Grape Berries Skin Following UV-C Irradiation Effects of Storage Temperature on Resveratrol and Its Glycosides Content in Grape Berries Skin Following UV-C Irradiation Determination of Piceid in Commercial Rhizoma Polygoni Cuspidati by HPLC Effects of processing on piceid and emodin in Polygonum cuspidatum