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Ca ( NO3 ) 2 수용액순환계에서의 냉동기동관부식과 방식대책
이형기,신철순,기문봉,박충근 한국부식학회 1979 Corrosion Science and Technology Vol.8 No.1
42% Ca(NO₃)₂水溶液의 循環系中에서 發生한 DCuT₁-H의 腐蝕은 Brine의 不適正 pH, 異物質의 混入 및 水流速度 등등이 單獨 또는 複合的인 作用에 基因하였음을 實驗 및 硏究를 通하여 確認하고, 防蝕 方法으로서 Brine의 製造法改善, 適正 pH의 決定, 異物質의 分離除去 및 設計 流速 維持 등 諸方法中 異物質의 分離 除去法-化學的 處理法-이 가장 效果的이었고 Brine의 循環適正 pH가 가장 큰 影響을 미치는 要素임을 알았다.
이형기,옥영길,최용훈,정호,Lee, Hyung-Kee,Ok, Young-Kil,Choi, Yong-Hun,Kim, Jung-Ho 대한한방안이비인후피부과학회 2015 한방안이비인후피부과학회지 Vol.28 No.2
Objective : To investigate how general characteristics and life habits of patients affect severity of acne which was determined by Korean Acne Grading system(KAGS). To adress correlation between the severity of acne and subjective stresses from which patients suffer. Methods : 86 patients answered to questionaire sheet on their general characteristics and life habits and rated their level of stresses as a number in the range between 0 and 10. Then an oriental medical doctor evaluated subject's acne grades, based of KAGS, through observations on papules, nodules, and scars before (medical) treatments. All data (collected) were analyzed using SPSS 22 (software for windows). To clearly demonstrate association of subjects general characteristics, life habits with KAGS grades, Chi-square tests were performed. The correlation between the KAGS grades and the level of stresses was determined using one-way ANOVA followed by Scheffe's post-hoc analysis. Results & Conclusion : Majority of subjects were women, students between 15 and 25 years old, and patients with normal range of Body Mass Index(BMI). Dysmenorrhea presence and premenstrual exacerbation of acne had statistically significant relationship, suggesting their potential influences on KAGS grades as major factors.