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병원중간관리자의 리더십과 조직혁신성 간의 관계에서 구성원 성숙도의 조절효과분석
김희래 ( Hee Rae Kim ),김영훈 ( Young Hoon Kim ),김한성 ( Han Sung Kim ),우정식 ( Jung Sik Woo ) 한국병원경영학회 2016 병원경영학회지 Vol.21 No.2
The study was conducted to compare organizational innovation depending on the leadership type of middle managers in general hospital. Moreover, the study was also to prove whether employees.readiness causes any differences to the link between leadership and organizational innovation. The result is based on 769 sheets of survey paper answered by administrations and nurses working at general hospitals or the same level of hospitals located in the metropolitan area. The methods of analysis used are as follows: reliability analysis, frequency analysis, t-test, ANOVA, multiple regression analysis, and hierarchical regression analysis. Main results of the study can be summarized as below. First, by analyzing the influence of task-behavior leadership on organizational innovation, R squre on knowledge management which is organizational innovation factor was 12.5%, R squre on creativity was 9.1%, and R squre on innovation behavior was 10.3%. Regression model appeared to be statistically significant as well. Both taskbehavior and relationship-behavior leadership have influence on organizational innovation and it is learned that relationship-behavior leadership has a bigger influence on all the organizational innovation factors. Second, moderating effect of the employee.s readiness is examined in terms of the link between leadership and organizational innovation. As a result, the member.s readiness had positive influence when it comes to the link between leadership and organizational innovation. Also, after verifying moderating effect of readiness (ability/ willingness), this study shows that ability readiness has positive influence on the link between task-behavior(or relationship-behavior) leadership and creativity, and innovation behavior while willingness readiness positively influences the link between task-behavior(or relationship-behavior) leadership and creativity & innovation behavior. To summarize results of the study, this study shows that the members who possess high readiness also have high organizational innovation, which promises their positive role in a group.
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소나무 잎과 가지의 정유와 그 성분들의 항산화 및 항노화 작용
김연정(Youn Joung Kim),조봉재(Bong Jae Cho),고명수(Myung Soo Ko),정재민(Jae Min Jung),김희래(Hee Rae Kim),송호선(Ho Sun Song),이지윤(Ji Yun Lee),심상수(Sang Soo Sim),김창종(Chang Jong Kim) 대한약학회 2010 약학회지 Vol.54 No.4
To investigate effects of pine essential oil isolated by steam distillation from Pinus densiflora needles (PN) and twigs (PT) on anti-oxidant and anti-aging activities, the experiments were carried out to determine anti-oxidant and antiaging activities on DPPH radical scavenging activity, NBT/xanthine oxidase-superoxide scavenging activity, silica-induced intracellular H2O2 and hydroxyl radical generation in RAW264.7 cells, hyaluronidase and elastase activities in vitro. Essential oil of PN and PT were contained 0.225 and 0.176 (w/v) %, respectively. PN was contained with 30 kinds of essential oil and its major constituent is α-pinene (21.5%). Further PT was contained with 40 kinds of essential oil and its major constituent is β-pinene (22.4%) in GC/MS assay. Other essential oils of PN were β-pinene, camphene, myrcene, limonene, terpinolene, α-terpineol, bornyl acetate, α-copaene, caryophellene and humulene and PT were α-pinene, camphene, phellandrene, limonene, terpinolene, α-terpineol, bornyl acetate, α-copaene, caryophellene and humulene. The essential oil of PT have more active than that of PN in anti-oxidant activity which has significant DPPH radical and superoxide scavenging activity, and significant inhibitory activities on silica-induced intracellular H2O2 and hydroxyl radical generation, as well as, significantly inhibited elastase and hyaluronidase activities. Further, phellandrene, myrcene and α-pinene have DPPH radical and superoxide scavenging activities, β-pinene, terpinolene, myrcene and phellandrene inhibited silica-induced intracellular H2O2 and hydroxyl radical generations. And also phellandrene and β-pinene inhibited hyaluronidase and elastase activities. In conclusion, the essential oils isolated from PN and PT have anti-oxidant and anti-aging activities.
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균일한 Hydroxyapatite Sphere 제조 및 특성분석
이강혁,신동근,권우택,김형순,김희래,김영희,김수룡,Lee, Kang Huk,Shin, Dong Geun,Kwon, Woo Teck,Kim, Hyungsun,Kim, Hee Rae,Kim, Younghee,Kim, Soo Ryong 한국세라믹학회 2014 한국세라믹학회지 Vol.51 No.3
A hydroxyapatite microsphere was prepared using a spray-drying method. The change in the shape as a function of the slurry concentration and the change in the degree of shrinkage according to the heat-treatment temperatures were observed. To obtain biomaterials with improved bio-stability, $CaHPO_4{\cdot}2H_2O$ and $Ca(OH)_2$ were mixed at a ratio of 6 : 4 and then ball-milled to synthesize hydroxyapatite. The hydroxyapatite microsphere was prepared using 30 wt% ~ 80 wt% hydroxyapatite slurry by a spray-drying method. For concentrations lower than 50 wt% or higher than 80 wt%, doughnut-shaped microspheres were produced. However, perfect microspheres were produced when using slurry concentrations of 50 wt% ~ 70 wt%. A dense microstructure was observed after a heat treatment at temperatures higher than $1100^{\circ}C$ and the size was reduced by 24.3% at these temperatures.
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