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.
1 Tay-Sachs disease (TSD) is an inherited condition that tends to affect people of central and northern European Jewish (Ashkenazi) or French-Canadian ancestry. The faulty gene targets the nervous system. Symptoms first appear at around six months of age in a previously healthy baby.