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
Devils Peak Brewing Company and wine hybrid, which uses grape must (juice) during the brewing process. The regular Vin de Saisson Devils Peak incorporates 20% Chenin blanc into the brewing process, imparting a super fresh aroma and crisp grape derived acidity. Devils Peak Brewing Company Devil's Peak Brewing Company is an award-winning South African craft brewery located at the base of the famous Devils Peak mountain in Cape Town. Initially started in a small premises in Somerset West by Greg Crum () with a maximum capacity of 6,000 litres a month, demand saw the brewery quickly outgrow its original site and in 2013 it