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.
Types of Pliers. Pliers are two-handled, two-jawed hand tools used mainly for gripping, twisting, and turning. Because the jaws meet at the tip, they can grip with some precision. Some types are made for cutting as well. Here are some of the main types of pliers. Adjustable Pliers or Slip-joint Pliers.