The complexity of tobacco smoke leads to some confusion about the mechanisms by which
it causes lung cancer. Among the multiple components of tobacco smoke, 20 carcinogens …

Morinda citrifolia L (Noni) has been used in folk remedies by Polynesians for over 2000
years, and is reported to have a broad range of therapeutic effects, including antibacterial …

Humans are exposed to many carcinogens, but the most significant may be the reactive
species derived from metabolism of oxygen and nitrogen. Nitric oxide seems unlikely to …

Measurement of human urinary carcinogen metabolites is a practical approach for obtaining
important information about tobacco and cancer. This review presents currently available …

Free radicals and other reactive species are generated in vivo and many of them can cause
oxidative damage to DNA. Although there are methodological uncertainties about accurate …

Free radicals and other reactive species are constantly generated in vivo and cause
oxidative damage to DNA at a rate that is probably a significant contributor to the age-related …

Evidence suggests that people living in urban areas have an increased risk of lung cancer
due to higher levels of air pollution in these areas. Benzo [a] pyrene (B [a] P) is currently …

The presence of a xenobiotic in the environment always represents a risk for living
organisms. However, to talk about impregnation there is a need to detect toxicity in the …

Damage to DNA by oxygen radicals and other reactive oxygen/nitrogen/chlorine species
occurs in vivo despite the presence of multiple antioxidant defence and repair systems. Such …

All forms of aerobic life are subjected constantly to oxidant pressure from molecular oxygen
and also reactive oxygen species (ROS), produced during the biochemical utilization of O2 …