Over 20 years after Kokichi Mikimoto succeeded in cultivating the world's first cultured pearl, then he established his first Black South Sea pearl farm in 1914, thereby revolutionizing the pearl industry forever.
This work included production of doors and window frames; hence exposure to oak dust was likely. Overall evaluation. Carpentry and joinery entail exposures that are possibly carcinogenic to humans (Group 2B) . For definition of the italicized terms, see Preamble Evaluation.his work included production of doors and window frames; hence exposure to oak dust was likely. Overall evaluation. Carpentry and joinery entail exposures that are possibly carcinogenic to humans (Group 2B) . For definition of the italicized terms, see Preamble Evaluation.
>Titanium Dioxide Classified as Possibly Carcinogenic to Humans. Titanium dioxide has recently been classified by the International Agency for Research on Cancer (IARC) as an IARC Group 2B carcinogen ''possibly carcinogen to humans''. Titanium dioxide accounts for 70% of the total production volume of pigments worldwide.