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
Metropolitan Brewing Technology & World Brewing Academy. The names of Metropolitan Brewing's beers reflect the industrial history of Chicago. Metropolitan's beers are distributed by Windy City Distribution, Wolf Distribution, and Breakthrough Beverage. Metropolitan Brewing Metropolitan Brewing is a brewery located in Chicago, Illinois that was founded in 2008 by (former) husband and wife team Doug Hurst and Tracy Hurst. The brewery was originally located in a converted warehouse in a historically industrial area of the Ravenswood neighborhood in Chicago. In 2017 they moved to a larger facility with a tap room at 3057 N Rockwell Street in Chicago. Metropolitan focuses on brewing