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.
The midline prominence of the nose, extending from the nasal root to the tip (also called the dorsum of the nose). Nasal Base: An imaginary line between the most lateral points of the external inferior attachments of the alae nasi to the face. Nasal Tip: