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.
retromolar pad. a mass of soft tissue, usually pear-shaped, that marks the distal termination of the mandibular residual ridge. It is composed of mucous glands and fibers of the buccinator muscle, the pterygomandibular raphe, the superior constrictor muscle, and the temporal tendon.