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추간판 탈출의 기질 흡수에 관한 혈관 신생과 대식구의 역할
양진서,허방 고신대학교 의과대학 2009 고신대학교 의과대학 학술지 Vol.24 No.1
Purposes: This study is performed to establish the histologic characteristics of matrix resorption in herniated intervertebral disc and to evaluate the role of neovascularization and macrophage infiltration, in especially concerning symptom duration and radiologic type of disc herniation. Materials & methods: Total seventy-two cases of herniated disc including protrusion 26, extrusion 24, and sequestration 22 cases were selected. The scales of matrix resorption, and vascularization were devided into 4 groups according to the extent and grade of each histologic changes. Through immunohistochemical staining (LSAB method) with monoclonal antibody CD34 (Neomarker, USA) and CD68 (DAKO, Denmark) in serial sections of paraffin embedded tissues, the expression of CD34 and CD68 in herniated discs was evaluated. Results: The incidence of matrix resorption and cell degeneration was 54.2%, which was markedly increased in prolonged (more than 1 month) symptom duration group and protruded or sequestrated type. Neovascularization, highlighted with CD 34 expression tends to be random and marginal, CD68 expressed macrophages were noted in well-vascularized region. Microvessel density (MVD) calculated by CD34 expression and CD68 expression in cases of matrix resorption were also pronounced in prolonged symptom duration group and protruded or sequestrated type. Conclusion: The authors confirm an important role of angiogenesis and macrophages in matrix resorption of disc herniation, especially in clinically prolonged and more severely herniated cases.
비철금속의 선삭시 윗면 절삭각이 표면 거칠기에 미치는 영향에 관한 연구
전재억,정진서,신규동,구양,하만경 한국공작기계학회 2000 한국공작기계학회 추계학술대회논문집 Vol.2000 No.-
In the present industry, there is not only the cutting of iron metal, but also the cutting of alloy aluminum, brass and plastic to wood(Paulownia). A variety of material is used and these industry is made need of the cutting material but lots of experiments processing is not enough at the moment. At this point, our team processed the basic experiment about influencing of cutting angle of bite concerned to manufacture in the turning of non-iron metal. Generally speaking, we recognized that there was occurrence of increase of rough surface with increasing of cutting angle in the non-iron metal. but in the cutting of wood we knew, there was special change with change of cutting angle.