From a chemical scientific stand point... What roles does salt play in food besides the usual afterthought of sprinkling some on top of your food item to increase/enhance the flavor. I know this is vague so lets just say bread. Why all these years have chefs/food scientist bothered adding salt to almost every bread recipe?
Does salt control moisture? Does salt control yeast activity? does salt control sugar regulation between the yeast through osmosis?
(Side not: Sorry if some of this is worded oddly. There thoughts straight off the brain.)