• Chipping, sledging and hammering on metal, stone or concrete • Use of manual, pneumatic and power impact tools • Caulking, brushing and grinding • Drilling, scaling and scraping soldering and casting hot metals • Handling acids, caustics and creosoted materials • Gas welding, cutting and brazing • Drilling overhead • In environments of excessive dust • Electric arc welding and cutting, and ot...

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Elevated plasma levels of the amino acid homocysteine increase the risk for atherosclerosis, stroke, myocardial infarction, and possibly Alzheimer’s disease. In relation to vascular biology, many studies suggest that endothelial dysfunction contributes to the complex changes that occur within the vessel wall during hyperhomocysteinemia (HHCy). The underlying molecular mechanisms that are activa...

Two players alternate tossing a biased coin where the probability of getting heads is p. The current player is awarded α points for tails and α + β for heads. The first player reaching n points wins. For a completely unfair coin the player going first certainly wins. For other coin biases, the player going first has the advantage, but the advantage depends on the coin bias. We calculate the fir...