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이해정(Hae Jeung Lee),이행신(Haeng Shin Lee),이윤나(Yoon Na Lee),장영애(Young Ai Jang),문재진(Jae Jin Moon),김초일(Cho Il Kim) 대한지역사회영양학회 2007 대한지역사회영양학회지 Vol.12 No.3
This study was performed to delineate the relationship between lifestyle and nutritional risk factors associated with hypertension in representative middle-aged Korean population. Hypertension in this study is defined as hypertensive (SBP≥ 140 mmHg or DBP≥ 90 mmHg) adults without recognition of a disease state before a health exam. With data from the 1998 and 2001 National Health and Nutritional Survey, nutrient intakes of 6,112 adults, 40-64 years of age were calculated using food composition database and matched with health examination records by individual ID. After excluding those with extreme intake values, the number of final subjects included in the analysis was 5,200 (male 2,458, female 2,742). Using logistic regression method, socio-demographic data, lifestyle factors, and nutrient intakes were analyzed. Risky factors for hypertension revealed in this study were age, sex, BMI over 23, waist circumference, alcohol intake of more than 16 g (male) or 8 g (female). Regarding nutrient intakes, the intakes of highest quartile for energy (≥ 2363.0 kcal) and protein (≥ 90.2 g) were significantly associated with higher risk of hypertension after adjusting for age, sex, and other socio-demographic factors (OR = 1.312 (1.046 - 1.711), OR = 1.488(1.194 - 1.854), respectively)). Although high intakes of sodium (≥ 6604.0 mg) and phosphorus seemed to be risk factors of hypertension also before energy adjustment (OR = 1.278(1.034 - 1.581), OR = 1.280(1.024 - 1.600), respectively), only high intakes of energy and protein remained significant after adjustment. This study revealed that modifying risky lifestyles and dietary patterns, especially high energy intake, high protein intake, and high alcohol drinking, in middle-aged Korean adults could result in a prevalence decrease and/or prevention of hypertension. (Korean J Community Nutrition 12(3) : 272~283, 2007)
文載軫,李東馥 대한금속재료학회 2002 대한금속·재료학회지 Vol.40 No.7
Four different brasses i.e., Cu-39.49%Zn (6:4 brass), Cu-39.11%Zn-0.80%Sn, Cu-38.85%Zn-0.45%Sn-0.47%Al, and Cu-37.68%Zn-0.46%Sn-1.82%Al were oxidized in air at 873, 973, and 1043 K to investigate the effects of Sn and Al on the oxidation behavior of 6:4 brass. The oxidation resistance of 6:4 brass increased with the addition of Sn and Al, The good oxidation resistance obtained in Cu-37.68%Zn-0.46%Sn-1.82%oAl was mainly attributed to the formation of Al_2CuO_4 that formed in the ZnO-rich oxide scale.
김성훈,이동복,정승부,최송천,문재진 대한금속재료학회(대한금속학회) 2001 대한금속·재료학회지 Vol.39 No.3
Induction-melted Cu-(0, 10, 20, 30, 40)%Zn allays were oxidized between 600 and 770℃ in air. With an increase in Zn contents, the oxidation resistance increased and, correspondingly, thin scales were formed. However, the scale adherence decreased with an increase in Zn contents. The oxidation products formed on Cu-(0, 10)%Zn consisted of ZnO with a small amount of copper oxides, while those formed on Cu-(20, 30, 40)%Zn consisted of (Cu₂O + CuO) with a small amount of ZnO.