In each male, the following testicular lesions were scored: (1) hemocytic infiltration of the gonadal acini and phagocytosis of spermatogenic cells, (2) hemocytic infiltration of interacinal connective tissue, (3) aggregations of hemocytes under the mantle epithelium, and (4) occurrence of brown cells.
For example: a long exposure refers to a single, protracted shutter cycle to capture enough low-intensity light, whereas a multiple exposure involves a series of relatively brief shutter cycles; effectively layering a series of photographs in one image.
STEL is the Short Term. Exposure Limit, which is a running 15-minute average concentration. The instantaneous concentrations may exceed the STEL value as long. as they never exceed the Ceiling, and the 15-minute running average. never exceeds the STEL limit.