Most people know that 28.35 grams is 1 Ounce, but that is the avoirdupois Ounce, the common method to weigh groceries etc. When you are weighing precious metals or stones, jewellers use another method called Troy in which 31.103 grams is 1 Troy Ounce.So remember:ost people know that 28.35 grams is 1 Ounce, but that is the avoirdupois Ounce, the common method to weigh groceries etc. When you are weighing precious metals or stones, jewellers use another method called Troy in which 31.103 grams is 1 Troy Ounce. So remember:
Used For: mtDNA tests can be used to test your direct maternal lineage - your mother, your mother's mother, your mother's mother's mother, etc. mtDNA mutates much more slowly than Y-DNA, so it is really only useful for determining distant maternal ancestry. Available To: Everyone.
The tuberculosis (TB) blood test, also called an Interferon Gamma Release Assay or IGRA, is a way to find out if you have TB germs in your body.The TB blood test can be done instead of a TB skin test (Mantoux).There are two kinds of TB blood tests:he tuberculosis (TB) blood test, also called an Interferon Gamma Release Assay or IGRA, is a way to find out if you have TB germs in your body.