The most commonly used diagnostic tool for tuberculosis is a simple skin test, though blood tests are becoming more commonplace. A small amount of a substance called PPD tuberculin is injected just below the skin of your inside forearm. You should feel only a slight needle prick.
The structure has a double bond and an adjacent atom with a lone pair, so it could have resonance. The possible resonance structures are below. The first structure has the most common bonding pattern for all of its atoms, so it is a reasonable Lewis structure.
Medical Definition of STRUCTURE. 1. : something (as an anatomical part) arranged in a definite pattern of organization. 2. 3. : the aggregate of elements of an entity in their relationships to each other.xamples of STRUCTURE. 1  They studied the compound's molecular structure. 2  The film had a simple narrative structure. 3  the structure of a plant. 4  the social structure of a college campus. 5  changes to the company's power structure. 6  The structure was damaged by fire. 7  Children need a lot of structure in their lives.