4.2.1.1) is a well-characterized pH regulatory enzyme in most tissues including erythrocytes, and catalyzes reversible hydration of CO2 to HCO3 and H . The only known physiological function of the CA isozymes is to facilitate the interconversion of CO2 and HCO3 , they therefore play key roles in diverse processes, such as physiological pH control and gas balance, calcification, and photosynthes...

The Epworth Sleepiness Scale (ESS) measures daytime sleepiness in adults. This paper reports the following data in 616 medical students: 1-ESS scores, 2-its correlation with the declared night sleep time, 3-comparison with ESS values obtained from Australia, 4-comparison of ESS values in a sub-population of 111 students tested early and late 1995. There were 387 males, 185 females and 4 not spe...