Brewing much studied, the preservative nature of the soft resins is not yet fully understood, though it has been observed that unless stored at a cool temperature, the preservative nature will decrease. Brewing is the sole major commercial use of hops. Yeast is the microorganism that is responsible for fermentation in beer. Yeast metabolises the sugars extracted from grains, which produces alcohol and carbon dioxide, and thereby turns wort into beer. In addition to fermenting the beer, yeast influences the character and flavour. The dominant types of yeast used to make beer are "Saccharomyces cerevisiae", known as ale yeast, and "Saccharomyces
Allagash Brewing Company creating what is known as a "living" beer. Today, Allagash has eight year-round beers in its portfolio, seven yearly releases, and numerous one-offs and keg-only releases. Allagash Brewing Company Allagash Brewing Company is a brewery in Portland, Maine. The brewery was founded in 1995 by Rob Tod in Portland, Maine. He recognized a void in the American Brewing movement of the time. While both German and British style beers were available throughout the country, Belgian-style beers were difficult to find. He established a small, 15-barrel brewery, and began brewing a beer modeled after a Belgian Wit beer, named Allagash White.