Autoimmunity. The immune system is a complex set of organs, cells, proteins and other substances that function to prevent infection. Primary immunodeficiency diseases are characterized by abnormalities in specific components of the immune system that lead to an increased susceptibility to infection.
How to Measure Ounces. Ounces are a measurement of mass or weight, and as such, you should use a scale when measuring ounces for a recipe, experiment, or similar procedure. In contrast, fluid ounces are a measurement of volume, so they are measured in a different manner. Note that there are also ways to estimate mass in ounces if precision is not necessary, and if required, you can easily convert a few other units of measurement into ounces.
An ounce (abbreviated oz; apothecary symbol : â¥) is a unit of mass used in some systems of measurement. Whilst various definitions have been used throughout history, two remain in common use: the avoirdupois ounce equal to approximately 28.3 g and the troy ounce of about 31.1 g.