At the object level . Permissions allowed or denied at the object level apply to the entire object. For example, you can set an object-level permission on an OU object that allows a particular group, such as Account Operators, to create child objects in the OU. At the property level .
Ball mills are used in chemistry and in industry to grind hard solids to a very fine powder. They are very similar to rock tumblers. Basically, the idea is to rotate a container filled with heavy metal balls that crush the substance that you want to grind.
Acetone can also be used to remove water from glassware in the laboratory. And it is a major component of some nail polish removers. The most common use of acetone is to formulate other chemicals. Formulation and production of other chemicals can account for up to 75 percent of all uses of acetone.Acetone is used in the manufacture of methyl methacrylate (MMA) and bisphenol-A (BPA).nd it is a major component of some nail polish removers. The most common use of acetone is to formulate other chemicals. Formulation and production of other chemicals can account for up to 75 percent of all uses of acetone. Acetone is used in the manufacture of methyl methacrylate (MMA) and bisphenol-A (BPA).