A judge has been expected to rule in a court battle between Penney and Macy's over whether Macy's has an exclus | ASSOCIATED PRESS. 24/7 Wall St. : Brick-and-mortar retailers have been suffering from slow economic activity for years, as well as from increased competition from online retailers. The rise in store closings is a prominent sign of their struggles.
Gel electrophoresis is one of the principal tools of molecular biology. The basic principle is that DNA, RNA, and proteins can all be separated by means of an electric field and size.
The settings on the device can be adjusted for the patient's comfort. Once larger pieces of tarter are dislodged, the dentist will make the switch to finer hand-held instruments. Often referred to as curettes or scalers, these tools are designed to eliminate smaller deposits on the teeth and smooth the tooth surfaces.