Cosmogenic Na, Be and terrestrial Cs, K radionuclides in ground level air samples collected weekly in Kraków (Poland) over years 2003-2006.

A low background gamma spectrometer with an Etruscan, 2500 years old lead shield and a muon veto detector were applied to study Na and Be activity concentration in ground level air aerosol samples collected weekly over the years 2003-2006 in Kraków. Each sample was formed with ca 100 000 m of passed air, collected with two parallel ASS-500 high volume air samplers. The results for K and Cs are also presented for reference and comparison.

Measurement of the transverse polarization of electrons emitted in free-neutron decay.

Both components of the transverse polarization of electrons (sigmaT1, sigmaT2) emitted in the beta-decay of polarized, free neutrons have been measured. The T-odd, P-odd correlation coefficient quantifying sigmaT2, perpendicular to the neutron polarization and electron momentum, was found to be R=0.008+/-0.

Exposure to environmental polycyclic aromatic hydrocarbons: influences on cellular susceptibility to DNA damage (sampling Kosice and Sofia).

The aim of this study was to investigate a possible influence of occupational exposure to carcinogenic environmental polycyclic aromatic hydrocarbons (c-PAHs) on cellular susceptibility to the induction of the DNA damage. Monitoring was performed and blood samples were collected from two groups of male subjects: occupationally exposed and matched controls. The group exposed to c-PAHs (average age of 35.