Streptomycin is also occasionally used to treat infections such as brucellosis and endocarditis. As for TB, when treating these infections, streptomycin should be used in combination with another antibiotic to help prevent resistance occuring.
DEFINITION of 'Oil Shale'. A type of sedimentary rock composed chiefly of a combination of silt and clay. Shale may contain kerogen, a type of organic matter that yields oil and gas.
Petroleum (Oil). Petroleum is an oily, flammable liquid with a specific odor. It is found in the sedimentary mantle of the earth and is a very important mineral resource. It is formed together with gaseous hydrocarbons, usually at depths in excess of 1.2â2.0 km.etroleum consists of various hydrocarbons (alkanes, cycloalkanes, arenes [aromatic hydrocarbons], and their hybrids) and compounds containing heteroatoms (oxygen, sulfur, and nitrogen) in addition to carbon and hydrogen.