Service dog trainers teach guide dogs, hearing dogs and therapy dogs to assist people with disabilities. Apprentice trainers typically work at service dog training schools under the supervision of experienced instructors and, with experience, may go on to instruct other trainers. This is a physically demanding position, which requires trainers to walk and control dogs of various sizes and breeds.
Barley is a food ingredient used in soups, stews and breads. This major cereal grain is a component for health foods and is used to ferment malt beer. A member of the grass family, barley also serves as animal fodder. In 2014, global sales from barley exports by country amounted to US$7.8 billion.
In beer brewing, germinating barley is added to the fermenting wheat. The germinating barley supplies the enzyme diastase which breaks the starch into maltose, a disaccharide of glucose. The yeast can separate maltose into glucose, but the metabolism of maltose by yeast is a slow process. As the maltose is hydrolized into two glucose molecules, the glucose is then fermented into ethanol.