  In a previous paper (Bian & Zhao 2002), it was suggested that contamination
to the luminosity of galactic nucleus from the host galaxies play an important
role in determining parameters of the standard $\alpha$ disk for AGNs. Using
the nuclear absolute B band magnitude instead of the total absolute B band
magnitude, the central black hole masses, the accretion rates and the disk
inclinations to the line of sight for 20 Seyfert 1 galaxies and 17
Palomar-Green (PG) quasars were recalculated. It was found that small value of
$\alpha$ is needed in the accretion disk for Seyfert 1 galaxies compared with
PG quasars. The difference of $\alpha$ maybe lead to the different properties
between Seyfert 1 galaxies and Quasars. Furthermore, we found most of the
objects in this sample are not accreting at super-Eddington rates when we
adopted the nuclear optical luminosity in our calculation.
