New calibrations for abundance determinations in HII regions metallicity range, i.
e. the relative accuracy of the calibration-based abundances is 0.1 dex. Although we
Oxygen abundance maps of CALIFA galaxies global azimuthal asymmetry for our sample of galaxies, i.
e. the asymmetry is small, usually lower than 0
On the influence of the environment on galactic chemical abundances abundances is large for any number of neighbour galaxies (at any environmental density), i.
e. galaxies