“…In general, emission spectra of tetracyclines are in the yellow range (dimethyltin dichloride [DMTC] being orange-yellow), xylenol orange fluoresces orange, calcein green fluoresces green, both calcein blue and 1,2-bis (2-aminophenoxy)ethane-N,N,N,N-tetraacetate (BAPTA) emit blue light, and alizarin red=complexone, procion H8-B, and hematoporphyrin are seen in the red spectrum. In the group of tetracyclines, at least 10 different types were described and used in a variety of species, such as amphibians, 42 mice, 43,44 rats, 41,45-49 guinea pigs, 50 rabbits, 14,39,51,52 (mini) pigs, 53,54 dogs, [55][56][57][58] sheep, 59-61 goats, 62-65 horses, 66 monkeys, 37 and man. 5,31,67,68 The label width is the result of bone mineralization rate multiplied by the period of time during which the labeled calcium is present in the extracellular fluid and is affected by the route of administration, the label clearance, and calcium affinity.…”