Manganese Bronze Holdings Manganese Bronze Holdings Manganese Bronze Holdings plc (MBH) was the holding company of LTI Limited: their sole business in their final years as a company was London black taxicab manufacturing through the LTI subsidiary. MBH was founded in 1899 and was once an important conglomerator of British motorcycle marques. The company acquired the subsidiary Carbodies in 1973, which was involved in the design, development and production of taxicabs. This subsidiary eventually became "LTI Limited", and traded first as "London Taxis International" and then as "The London Taxi Company". The sale of its components division in 2003 left the company with
Manganese on the kidneys and on the liver. Manganese exposure in United States is regulated by the Occupational Safety and Health Administration (OSHA). People can be exposed to manganese in the workplace by breathing it in or swallowing it. OSHA has set the legal limit (permissible exposure limit) for manganese exposure in the workplace as 5 mg/m over an 8-hour workday. The National Institute for Occupational Safety and Health (NIOSH) has set a recommended exposure limit (REL) of 1 mg/m over an 8-hour workday and a short term limit of 3 mg/m. At levels of 500 mg/m, manganese is immediately dangerous