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.
As a technician you may be working in either quality control or quality assurance and most positions relating to these specific jobs are in the engineering or manufacturing sectors.Work in quality assurance is about ensuring that: 1  An organisationâs management system requirements have been properly defined.s a technician you may be working in either quality control or quality assurance and most positions relating to these specific jobs are in the engineering or manufacturing sectors. Work in quality assurance is about ensuring that: 1  An organisationâs management system requirements have been properly defined.