All other polonium isotopes are short-lived except polonium-210 (half-life about 138 days), which is the most commonly used isotope. It is prepared by bombarding bismuth with neutrons in a nuclear reactor.olonium has 34 isotopes, more than any other element. All of these isotopes are radioactive. The most stable, polonium-209, has a half-life of about 103 years. Polonium-208 (half-life about 3 years) is the only other polonium isotope with a half-life over one year.
Ashkenazi Jewish genetic diseases are a group of rare disorders that occur more often in people of Eastern European (Ashkenazi) Jewish heritage than in the general population.
About one in a thousand Jews of Ashkenazi descent carry the genetic mutation that can result in Niemann-Pick diseases. Autosomal recessive Prevalence: 1 out of 75 Ashkenazi Jews are carriers. Canavan - is caused by an enzyme deficiency. One in forty Ashkenazis carry the genetic mutation that causes Canavan.