Matrix. Calcifications or mineralization within a bone lesion may be an important clue in the differential diagnosis. There are two kinds of mineralization: a chondroid matrix in cartilaginous tumors like enchondromas and chondrosarcomsa and an osteoid matrix in osseus tumors like osteoid osteomas and osteosarcomas.
Oil refinery jobs will have one set of required qualifications, while other jobs may have different qualification requirements. You will need to complete a high school education in order to become a refinery operator in most cases. Once you finish high school, it is a wise decision to enroll in an associate's degree program that will train you for work as a refinery operator.
For other uses, see Refinery (disambiguation) . A refinery is a production facility composed of a group of chemical engineering unit processes and unit operations refining certain materials or converting raw material into products of value.he image below is a schematic flow diagram of a typical oil refinery depicting various unit processes and the flow of intermediate products between the inlet crude oil feedstock and the final products.