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윤정한(Jeong-Han Yun),김우년(Woon-Nyon Kim),서정택(Jung-Taek Seo) 한국정보보호학회 2012 情報保護學會誌 Vol.22 No.5
제어시스템에 대한 사이버테러는 사회적, 경제적으로 큰 혼란을 발생시킬 수 있기 때문에 최근 제어시스템은 사이버테러의 제 1목표로 부각되고 있다. 이에 발맞추어 제어시스템 보안을 위한 연구 및 제품 출시가 많이 이루어지고 있다. 특히 제어시스템 가용성에 영향을 주지 않을 수 있는 제어시스템 네트워크 보안기술이 그 중심에 있다고 하겠다. 본 논문에서는 제어시스템 네트워크 보안에 대한 연구 및 제품의 동향을 살펴본다. 그리고 앞으로 제어시스템 네트워크 보안기술 연구시 필요한 사항들을 짚어본다.
스트론튬 이온이 무모 생쥐의 표피 투과 장벽 회복에 미치는 영향
김현정 ( Hyun Jeong Kim ),김민정 ( Min Jung Kim ),정세규 ( Se Kyoo Jeong ),최기주 ( Ki Ju Choi ),서정택 ( Jeong Taek Seo ),최응호 ( Eung Ho Choi ),안성구 ( Sung Ku Ahn ),이승헌 ( Sung Hun Lee ) 대한피부과학회 2006 대한피부과학회지 Vol.44 No.11
Background: Several ions, such as calcium or magnesium ions, are reported to have regulatory effects on epidermal permeability barrier homeostasis. Recently, it has been suggested that strontium ion can play a substitutive role for calcium ion in various cellular reactions. Objective: This study was conducted to investigate the effects of strontium ion, either alone or in combination with calcium or magnesium ions, on epidermal permeability barrier homeostasis. Methods: Female hairless mice were used to study the effects of various ions on epidermal permeability barrier recovery. Calcium chloride solution, magnesium chloride solution or strontium chloride solution were topically applied to barrier-disrupted skin, either alone or simultaneously. Change of transepidermal water loss, which represents permeability barrier function, was measured by TEWameter and morphological change was also observed by light and electron microscopy. Results: Topical application of strontium chloride solution accelerated permeability barrier recovery rate, compared with vehicle-applied skin. Magnesium chloride solution also accelerated barrier recovery rate, as reported in previous studies. Interestingly, simultaneous application of strontium and calcium ions significantly accelerated barrier recovery rate, compared to application of strontium or calcium ion alone. Nile red staining confirmed the increased neutral lipid deposition in strontium ion applied skin. Electron microscopic observation also revealed an increased lamellar body secretion in strontium ion applied skin. Conclusion: Strontium ion can play a regulatory role in epidermal permeability barrier homeostasis due to, at least in part, its competitive action on calcium ion for the same ion channel. (Korean J Dermatol 2006;44(11):1309~1316)