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This density parameter also provides insights into a particles shape, whereby a homogeneous, spherical particle has a constant effective density equivalent to its material density and a fractal-like particle, such as soot, has a size-dependent effective density lower than its material density

stricter for the ultrafine tar particles in cigarette smoke

Overall, the interprofessional pharmacy-dental smoking cessation model was associated with sustained improvements in smoking outcomes at three and six months, supported by biochemical verification, the researchers wrote

In a nutshell, when a developing human brain is exposed to trauma, the body involuntarily releases stress-response chemistry that alters the development of key brain structures