1 INTRODUCTION

2 SAMPLE SELECTION
2.1 Selection criteria
2.2 Extinction correction

3 SAMPLE DEFINITION

4 PLASMA DIAGNOSTIC RESULTS

5 ELECTRON DENSITY AND ELECTRON TEMPERATURE IN NLRS
5.1 High Te NLRs in line-ratio diagnostic diagrams

6 M* AND SFR / M*
6.1 M* versus SFR/M*
6.2 Galaxy formation timescale sequence

7 DISCUSSION
7.1 Shock effects on ne and Te
7.2 Strong [O III] narrow-line AGN: low-metallicity candidates?

8 SUMMARY