The eukaryotic genomes expand their sizes via several different pathways, one of which is the duplication of existing gene(s). According to the classical model by Ohno (1970), one purpose of gene duplication is to allow for evolutionary gain of new function(s). Indeed, gene duplications were well documented in the 1980’s through extensive molecular cloning and sequencing of genes and pieces of ...

BACKGROUND Heart disease causes 45% of the deaths that occur among U.S. firefighters while they are on duty. We examined duty-specific risks of death from coronary heart disease among on-duty U.S. firefighters from 1994 to 2004. METHODS We reviewed summaries provided by the Federal Emergency Management Agency of the deaths of all on-duty firefighters between 1994 and 2004, except for deaths a...

in responding to emergency events. The assessment of shelters for the 2005 hurri­ cane evacuees is a great example of the use of these skills. Many of the environmental health issues that existed in the shelters were the same as those that practitioners assess during their regular duties. These is­ sues include safe food preparation, safe and adequate supply of water, infection control/ handwas...