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BaPr_(1-x)YbXO_(3-δ) (X=0.1, 0.2, 0.3)계 페롭스카이트 산화물의 전기전도도
박형경,최순목,김신,이홍림 연세대학교 산업기술연구소 2000 논문집 Vol.32 No.1
Samples of the system BaPr_(1-x)YbXO_(3-δ) were prepared in the composition range of 0.1mole<X<0.5mole Yb^(3+) by the solid state reaction method. XRD measurements showed that the maximum doping level was 0.3mole YbO1.5 in BaPrO3 to obtain the single phase of the structure of BaPrO_3. The electrical conductivity was observed for the composition range of 0.1mole < X < 0.3mole Yb^(3+) in BaPrO_3. The electrical conductivity of BaPr_(1-x)YbXO_(3-δ)(X=0.1-0.3) in wet atmosphere was lower than that in dry atmosphere. It is, therefore, considered that the electrical conductivity of this system was decreased due to the consumption of the holes under the water vapor.
어린이집 주임교사의 역할수행에 대한 관련 변인: 직업 선택 동기, 직무 환경 및 원장의 변혁적 리더십을 중심으로
박형경 ( Hyung Kyung Park ),문혁준 ( Hyuk Jun Moon ) 대한가정학회 2017 Human Ecology Research(HER) Vol.55 No.3
This study analyzes the motivation for selecting child-care profession, job environment, director`s transformational leadership associated with child-care center teacher`s (lead teacher and head teacher) role performance. The subjects of this study were 336 teachers (lead teacher and head teacher) who worked in a child-care center located in Seoul and Gyeonggi-do. Data were collected through self-report questionnaires. Collected data were analyzed using the IBM SPSS Statistics ver. 23.0 program using t -test, F -test, analysis of variance, post-hoc analysis (Duncan), Pearson`s correlation analysis, and multiple regression analysis. The results of the study are as follows. First, the study inquired on if the child-care center teacher`s general characteristics (year) influence the child-care center teacher`s role performance. Consequently, significant differences were not found in overall role performance according to teacher`s career but not in the child-care center teacher`s age, academic ability, and licensing. Second, the motivation for selecting profession (teaching aptitude, teacher`s desire for social respect, and possibility of self-realization), job environment, and director`s transformational leadership had a significant positive correlation with overall role performance. The motivation for selecting profession (without motives) had a significant negative correlation with overall role performance. Third, the strongest predictors of `overall role performance` were teaching aptitude, variable of motivation for selecting child-care profession, and director`s transformational leadership variable.
간호사 어머니의 양육스트레스에 영향을 미치는 변인 연구
박형경 ( Hyung Kyung Park ),문혁준 ( Hyuk Jun Moon ) 대한가정학회 2015 Human Ecology Research(HER) Vol.53 No.6
This study analyzes child variables (child`s temperament and child`s depression) and parent variables (spouse support, social support, and job satisfaction) associated with married nurse parenting stress and provides data that can assist institutional support mechanisms. The research targeted 232 nurses at five general hospitals in Seoul, Gyeonggi-do, Jeolla-do, Chungcheong-do with elementary children. Data were analyzed using t-test, Pearson correlation analysis, and hierarchical regression analysis. The results of the study were as follows. First, there were significant correlations in parenting age, child number and parenting stress for mothers. Second, married nurses with high sociality of temperament, low sensitivity of temperament, and high activity of temperament child as well as married nurses with spouse support, social support, job satisfaction saw a reduction in high levels of parenting stress. Third, the results of this study showed that child depression, sensitivity of temperament, spouse support, and job satisfaction were factors to understand married nurses parenting stress. Child depression was an important factor to understand married nurses parenting stress. The results indicated variables affecting parenting stress of married nurses and suggested directions for the social welfare system.
李相馥,朴炯徑 최신의학사 1971 最新醫學 Vol.14 No.2
After the rats being exposed to one half atmospheric pressure for 8 of each 24 hours from 1 to 6 days, the changes in plasma erythropoietin level were determined. The experimental results were as follows. The significant -elevation in plasma erythropoietin level already appeared at 1 day-exposure group, peak levels were present at 3 days-exposure group, and erythropoietin levels gradually began to decline approximately to normal level from 4 days-exposure group.
마우스 Carbonic anhydrase 활성에 미치는 Xanthine 유도체의 영향
유명열,박형경,이정익,Yu, Myung-Yul,Park, Hyung-Kyung,Lee, Chung-Ik 대한약리학회 1972 대한약리학잡지 Vol.8 No.1
This study was undertaken to observe the effect of xanthine such as caffeine and aminophylline on the activity of carbonic anhydrase in the kidney and stomach of the mouse. Carbonic anhydrase activities were measured by Philpot & Philpot method (1936). The results of this experiment were as follows: 1. The activity of carbonic anhydrase in the kidney of the mouse was silightly inhibited by the administration of caffeine (0.1 mg/gm, B.W.) or aminophylline (0.08 mg/gm, B.W.). The inhibition was more pronounced by the administration of aminophylline than that of caffeine. 2. In the stomach, there was no significant change in the activity of the carbonic anhydrase after the administration of either caffeine or aminophylline.
정경희,강성욱,김수강,송정윤,박형경,백형환 대한스트레스학회 2009 스트레스硏究 Vol.17 No.2
Ets variant 6 (ETV6) gene is known to be involved in a large number of chromosomal rearrangements associated with leukemia. In recent study, it is reported that excess body weight may be a risk factor for leukemia and overweight/obesity have greater risk of leukemia compared to non-overweight individuals. For a possible relation of the genetic polymorphism of ETV6 with overweight/obesity, we genotyped fifty-five single nucleotide polymorphisms (SNPs) of ETV6 using the Affymetrix Genotyping chip array in 206 overweight/obese and 152 normal subjects in the Korean population. Logistic and multiple regression models were employed to analyze the genetic contributions of polymorphisms. Of the fifty five polymorphisms, the four SNPs showed a significant association with overweight/obesity in 3 alternative models (codominant, dominant, and recessive models; p<0.05 after adjusting for age and sex) were rs2723825, rs17818048, rs2710304, and rs7296981. Two haplotypes of ETV6 (block 7: GGG; block 9: CCC) containing significant polymorphisms (rs17818048, rs2710304, and rs7296981) exhibited significant association with the risk of overweight/obesity. Our results suggest that polymorphisms in ETV6 may be associated with overweight/obese in Korean population. (Korean J Str Res 2009;17:163∼168)
Bradykinin 이 Guanethidine 전처치(前處置) 가토(家兎)의 혈압(血壓)에 미치는 영향(影響)
이덕희(Lee, D.H.),김기진(Kim, G.J.),박형경(Park, H.K.) 대한약리학회 1972 대한약리학잡지 Vol.8 No.1
It is well known that pharmacological actions of bradykinin are smooth muscle dilatation, increase in capillary permeability, accumulation and migration of leucocytes and inducement of pain. The most significant action of bradykinin is the dilatation of blood vessels. The responses of bradykinin (0.5ug/kg, i. v. injection) on blood pressure were observed before and after single i. v. administration of guanethidine (2mg/kg) in the rabbits. The result of experiment was as follows: In the rabbit pretreated with guanethidine, the depressor response of bradykinin was much pronounced in comparison with that of normal rabbit.