I got two hours of sleep a day, which is not enough, although four hours would be sufficient. In order to get more sleep this time I'm going to try to reduce the amount of air-traffic control communication that I have to do, so that I'm not constantly on the radio. NOVA: Your last flight lasted a little over six days.
Alpha and beta glucose differ in stereochemistry at one single carbon. In the alpha-form, a bulky group is in a so-called axial position, and in the beta-form, the group is in a more favourable equatorial position. These different positions lead to different bonds in polysaccharides, giving rise to a need for different enzymes to digest them.
The alpha cells and the beta cells are found in the islet of Langerhans and are responsible for different processes. The alpha cell, also known as the Î±-cell, is an endocrine cell that is responsible for synthesizing and secreting the peptide hormone glucagon, which elevates the glucose levels in the blood.