Since long, St. John's wort has been recognized by people for the health benefits possessed by the herb. For instance, it possesses wonderful anti-viral as well as antiseptic characteristics and is also effective when used as an analgesic.
Occupational Exposure Limits (. s) restrict the amount and length of time a worker is exposed to airborne concentrations of hazardous biological or chemical agents.here are. s for over 725 substances under R.R.O. 1990, Regulation 833 (Control of Exposure to Biological or Chemical Agents) and Ontario Regulation 490/09 (Designated Substances) under Ontarioâs Occupational Health and Safety Act.
For minor workers, the annual occupational dose limits are 10 percent of the dose limits for adult workers. For protection of the embryo/fetus of a declared pregnant woman, the dose limit is 0.5 rem (5 mSv) during the entire pregnancy. The occupational dose limit for adult workers of 5 rems (0.05 Sv) TEDE is based on consideration of the potential for delayed biological effects. The 5-rem (0.05 Sv) limit, together with application of the concept of keeping occupational doses ALARA, provides a level of risk of delayed effects considered acceptable by the NRC.