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.
Oil shale usually meets the definition of shale in that it is a laminated rock consisting of at least 67% clay minerals, however; it sometimes contains enough organic material and carbonate minerals that clay minerals account for less than 67% of the rock.Shale is a rock composed mainly of clay-size mineral grains.These tiny grains are usually clay minerals such as illite, kaolinite and smectite. Shale usually contain other clay-size mineral particles such as quartz, chert and feldspar.il shale usually meets the definition of shale in that it is a laminated rock consisting of at least 67% clay minerals, however; it sometimes contains enough organic material and carbonate minerals that clay minerals account for less than 67% of the rock. Shale is a rock composed mainly of clay-size mineral grains.