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
Houston Brewing Company and is still a thriving business, distributing throughout the UK including ALDI supermarkets and Wetherspoons. The seven principal cask ales are (with alcohol by volume levels denoted): The principal cask ales are available throughout the year in the United Kingdom. A feature of the Houston Brewing Company is the range of season ales that are produced (currently one per month) for distribution throughout Scotland and the UK. The caricature style labels for the seasonal beers often depict members of staff of the Fox & Hounds pub. Various beers from the Houston Brewing Company have won a number of awards and