Category: Q

A class of synthetic, broadspectrum antibacterial agents that exhibit bactericidal action. A drug used to treat Gram-negative and Gram-positive bacterial infections of the respiratory and urinary tracts and of the gastro-intestinal system. A group of chemically related synthetic antibiotics. Examples include nalidixic acid, ciprofloxacin and norfloxacin which are effective in treating uncomplicated urinary-tract, respiratory-tract and…

The second most abundant mineral in the earth’s continental crust. It is an extremely hard material made up of a continuous framework of SiO4. Silicon dioxide, the principal ingredient of sandstone (crystallized silica; rock crystal). When crystal is clear and colorless, it permits the passage of large amounts of ultraviolet rays.  

One of the four sections into which the dental arches can be divided, as determined by an imaginary midline between the central incisors, dividing each dental arch into two halves. Pertaining to a specific area of the abdominal wall. One of four sectors of the body thought of as being divided by the sagittal plane…