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.
Below is some information on the major occupational exposure values. Permissible Exposure Limits (PELs): The Occupational Health and Safety Administration (OSHA) has set permissible exposure limits (PELs) on the amount or concentration of a substance in the air.ome of the PELs are listed as ceiling values â concentrations above which a worker should never be exposed, or short-term exposure limits (STELs) âaverage concentrations which should not be exceeded over a 15 minute time period. It is important to note that the PELs tend to be higher than other published values.