Table 4: Nitrogen abundance determinations using different diagnostics from following papers: (1) van Zee et al. (1998b); Pagel et al. (1992), (2) Pagel et al. (1992); Thurston et al. (1996), (3) Shaw & Dufour (1995), (4) Kewley & Dopita (2002).
Diagnostic $\log$ (N/O)

(1) $-0.98\pm0.23$

(2) $-0.90\pm0.22$

(3) $-0.98\pm0.13$

(4) $-0.90\pm0.08$

	1 Introduction
	2 Observations and data reduction
	3 Galaxy and QSO spectra
	4 Derived properties
	5 Kinematics
	6 Discussion
	7 Conclusions
	References