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Nam Gook Kee,Hyun Soo Kim,최현정,Hyoung-June KIM,서영록 대한암예방학회 2021 Journal of cancer prevention Vol.26 No.3
Air pollutants are in the spotlight because the human body can easily be exposed to them. Among air pollutants, the particulate matter (PM) represents one of the most serious toxicants that can enter the human body through various exposure routes. PMs have various adverse effects and classified as severe carcinogen by International Agency for Research on Cancer. Their physical and chemical characteristics are distinguished by their size. In this review, we summarized the published information on the physicochemical characteristics and adverse effects of PMs on the skin, including carcinogenicity. Through comparisons of biological networks constructed from relationships discussed in the previous scientific publications, we show it is possible to predict skin cancers and other disorders from particle-size-specific signaling alterations of PM-responsive genes. Our review not only helps to grasp the biological association between ambient PMs and skin diseases including cancer, but also provides new approaches to interpret chemical-gene-disease associations regarding the adverse effects of these heterogeneous particles.
플라즈마용사한 Mo 및 Co합금 피복층의 상변태거동 및 고온기계적성질
김병기,남태현,하국현,조규봉,이수완 대한금속재료학회(대한금속학회) 1997 대한금속·재료학회지 Vol.35 No.10
Phase transformation behaviours and high temperature mechanical properties of Mo and Co alloy coating layers made by plasma spray coating method have been investigated by means of optical microscopy, X-ray diffraction, high temperature microvickers hardness and wear tests. The splat is relatively flat with the boundary in Mo coating layers, whereas wavy in Co alloy coating layers at high temperature. Crystallization of Co alloy coating layers which were amorphous at room temperature started to occur at about 1073 K and consequently Co_7Mo_6 and Co₃Ma compounds were formed. Wear volume of Co alloy coating layers almost kept constant with increasing temperature below 1073 K, and then started to increase at 1073 K. This was attributed to the crystallization which resulted in decrease in hardness- Wear resistance of Co alloy coating layers was superior to that of Mo coating layer overall test temperatures.
플라즈마 용사한 Mo 및 Co 합금 피복츠의 미세조직 및 기계적 성질
김병기,남태현,허경철,이수원,하국현 대한금속재료학회(대한금속학회) 1995 대한금속·재료학회지 Vol.33 No.4
Microstructures and mechanical properties of Mo and Co alloy coating layers made by plasma spray coating method have been examined by measn of optical microscopy, X-ray diffraction, scanning electron microscopy, microvickers hardness tests, surface roughness tests and wear resistance tests. The splat is relatively flat with the boundary in Mo layers, whereas wavy with interfaces at some angle to the surfaces in Co alloy layers. The Mo coating layers were shown to be crystalline state but the Co alloy layers to be amourphous state in X-ray diffraction profiles. The surface roughness, hardness, wear resistance of the Co alloy layers were superior to those of the Mo layers. The wear mechanism in plasma coating layers was splat delamination in which the wavy splat is much harder to be delaminated than the falt splat.