Viscoelasticity and histology of the human cartilage in healthy and degenerated conditions of the knee.

Background: There are many studies on osteoarthritis, but only a few studies deal with human arthrosis, comparing the mechanical properties of healthy and diseased samples. In most of these studies, only isolated areas of the tibia are examined. There is currently only one study investigating the complete mapping of cartilage tissue but not the difference between instantaneous modulus (IM) in healthy and diseased samples.

[Fractional and component composition of dust in the air of workplace at machinery enterprise].

The authors present results of assessment of fractional and component composition of dust entering workplace of machinery enterprises. The results prove topicality of data accumulation on actual contents of dusts for more reliable and precise evaluation of the dusts mixture influence on the workers' health.