Endpoints mark the beginning or end of a line segment or ray. Line segments have two endpoints, giving them defined lengths, whereas rays only have one endpoint, so the length of a ray cannot be measured. The midpoint of a line segment marks the point at which the segment is divided into two equal segments. In other words, the lengths of the segments from either endpoint to the midpoint are equal. For instance, if M is the midpoint of the segment , then .
Zimecterin Paste Horse Wormer (1.87% Ivermectin) is the original patented formula of ivermectin paste provides parasite control for 60 species and stages of parasites in horses, nearly twice as many as claimed by generic equivalents.
For cattle the tolerance of residues are specified in 21 CFR 556.344. A tolerance for the marker residue (22, 23-dihydro-avermectin B1a) of ivermectin is 100 ppb in the liver (target tissue). The withdrawal time is 35 days following one subcutaneous injection of IVOMEC as specified in 21 CFR 522.1192. The original approval of ivermectin injection was as an over-the-counter drug.