STUDIES ON THE STATUS AND AVAILABILITY OF SELENIUM IN SOILS IN SHENXAN,ZHEJIANG PROVINCE Chemical fertilizer and food security Research progress on hypolipidemic constituentsin Alismatis Rhizoma and their pharmacology and clinical application Effect of different compatibility of Daphnes Giraldii Cortex and Glycyrrhizae Radix et Rhizoma on adjuvant-induced arthritis in rats Preparation of ethosomes-based gel of demethylzeylasteral and its transdermal behavior in vitro Analysis on in vivo metabolites of α-hederin in rats by UPLC-MS/MS Studies on Resistance of Pine Species and Masson Pine Provenances to Bursaphelenchus xylophilus and the Epidemic Law of the Nematode in Nanjing Study on the Carbon,Nitrogen Cycling characteristics of dry farmland ecosystem on Loess Plateau