Food Canning Facts. When processing foods using the open kettle method, jars should still be sterilized. When you cook the foods in the jars, the jars do not need sterilization, but should be thoroughly washed.
Meanwhile, horizontal ridges are more likely to signal a problem. One condition, Beau's lines, is characterized by indentations across the nail bed that are a sign of disrupted growth due to illness.
Beau's lines should also be distinguished from Muehrcke's lines of the fingernails. While Beau's lines are actual ridges and indentations in the nail plate, Muehrcke lines are areas of hypopigmentation without palpable ridges; they affect the underlying nail bed, and not the nail itself. Beau's lines should also be distinguished from Mees' lines of the fingernails, which are areas of discoloration in the nail plate. There are several causes of Beau's lines. It is believed that there is a temporary cessation of cell division in the nail matrix.