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
Rocket Republic Brewing Company part time position at the, now defunct, Olde Towne Brewing Company in Huntsville, Alabama. At Olde Towne, Crigger learned the business aspect to brewing as well as how to brew on Olde Towne's 20 bbl brewhouse. In 2008, Crigger attended a class at Chicago's Siebel Institute of Technology on how to start your own brewery. Rocket Republic ceased contract brewing, started brewing out of their own facility in March of 2015 and opened their tap room on March 17, 2015, St. Patrick's Day. All beer is produced out of their 10,000 square foot warehouse space converted into a functioning brewery.