your ID: 0164 First Name: Dawei Last Name: Xu Affiliation: National Astronomical Observatories, Chinese Academy of Sciences Title: Probing the NLR in NLS1s from SDSS spectroscopy Authors: D. Xu, S. Komossa, H. Zhou, J. Wei and T. Wang Topic: 7 Session: oral Abstract: We study the NLR properties of NLS1s. Various correlations between the optical properties of NLS1s and BLS1s are detected. We investigate the relation between M_BH, L/L_Edd and physical parameters of the NLR, in order to search for the driver of the observed trends.