Calculating Percent Recovery & Percent Yield. Percent Recovery: Percent recovery is used in cases where no chemical reaction is taking place, as in purification of a. sample. It is calculated as follows: % recovery =. amount pure product recovered (g) amount of crude material used (g) x 100. Percent Yield: Percent yield is used is cases where a chemical transformation occurs.
marÂ·giÂ·nal ridge. 1. An elevation of enamel that forms the proximal boundaries of the occlusal surface of premolars and molars. 2. An elevation on the mesial and distal portions of the lingual surface and, occasionally, the labial surface of incisors.
alveolar plate fenestration apical fenestration. aorticopulmonary fenestration aortic septal defect. apical fenestration a condition sometimes seen in children, consisting of round or oval openings perforating the plate of bone that overlies a pulpless primary tooth.Called also alveolar plate fenestration.1. the act of perforating or condition of being perforated. 2. the surgical creation of a new opening in the labyrinth of the ear for restoration of hearing in otosclerosis. aorticopulmonary fenestration aortic septal defect.enestration. 1. the act of perforating or the condition of being perforated. 2. the surgical creation of a new opening in the labyrinth of the ear for the restoration of hearing in otosclerosis.