Soil water status as a function of pressure (tension). Soil water status in natural soils can range from a flooded. condition to drainable gravitational water to plant available water. down to hydroscopic water. Tensions in natural soils do not. exceed -31,000; in this range, water is absorbed from the air.
Advanced Search. Tay-Sachs disease (the most severe form of Hexosaminidase A deficiency) is a progressive, fatal genetic condition that affects the nerve cells in the brain.
Things to remember. 1  Tay-Sachs disease is a genetic condition common in Ashkenazi Jews and French-Canadians. 2  The faulty (mutated) gene stops the cells of the nervous system from producing an enzyme vital to the health of the brain and spinal cord.