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심경원,김지연,서희선,이홍수,이상화,강지현 대한비만학회 2002 The Korean journal of obesity Vol.11 No.2
연구배경 : 국내 비만 여성을 대상으로 비용이 적게 들고 단순하면서도 보다 정확하게 체지방률을 추정할 수 있는 체지방률 추정식을 작성함으로써 쉽게 체지방률과 조절해야하는 지방의 양을 판단할 수 있도록 하고자 한다. 방법 : 이대목동병원 비만클리닉을 처음으로 내원한 19세 이상의 성인 여자 607명 중 체질량지수가 25 kg/㎡ 이상인 500명을 연구대상으로 하여 목, 가슴, 허리, 엉덩이, 대퇴, 하퇴, 발목, 상완, 전완, 손목의 10부위의 둘레와 생체전기저항분석법 (bioelectrical impedance analysis, BIA) 방식의 체성분 분석기를 이용하여 체지방률을 측정하였다. 체지방률 추정식을 구하기 위해 BIA에 의한 체지방률을 종속변수로 하고 , 신체 둘레 계측기 및 신장, 체중, 체질량지수, 연령을 독립변수로 하여 단계별 다중회귀분석 (multiple stepwise regression)을 시행하였다. 결과 : 신장과 체중, 연령, 체질량지수 및 신체 둘레 측정치 중 체지방률을 반영하는 지표는 체질량 지수, 전완둘레, 신장, 엉덩이 둘레, 하퇴둘레였고, 이 다섯가지 지표를 이용한 체지방률 추정식은 66.1%의 예측력과 2.86%의 측정 오차를 나타냈다 (R^2=0.661, SEE=2.86). 결론 : 비만한 성인 여성에서 신장과 체중, 연령 및 신체 둘레 계측치를 이용한 본 연구의 추정식은 체지방률(%)을 적은 오차범위로 비교적 정확하게 반영하였다. Background : This study was conducted to develop a regression equation that accurately estimates body fat percentage using relatively easy and inexpensive method in adult obese Korean women. Method : Data were collected among 500 obese Korean women visiting obesity clinic in Ewha woman's university Mokdong hospital, Seoul, Korea. Height, weight, and circumferences at ten body sites (neck, chest, waist, hip, thigh, calf, ankle, arm, forearm, wrist) were measured s well as total body bioelectrical impedance. Results : The full regression equation estimates body fat percentage included six variables : BMI, forearm circumference, height, hip circumference, thigh circumference. This equation accounted for 66.1% of the variance in body weight measured by bioelectrical impedance, and their standard error of estimate was 2.86%. Conclusion : For the obese Korean women in this study, circumference measurements provided a s relatively good estimation of body fat percentage.
( Jee Hwan Ahn ),( Byung Ju Kang ),( Sun In Hong ),( Jung Su Lee ),( Jae Seung Lee ),( Yeon Mok Oh ),( Sang Do Lee ) 대한결핵 및 호흡기학회 2014 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.118 No.-
Background: A vasoreactive subset of patients with idiopathic pulmonary arterial hypertension (IPAH) was noted in Western countries, which showed favorable prognosis with treatment with high-dose calcium channel blockers. We aimed to identify IPAH patients with vasoreactivity in Korea and to show their clinical characteristics and prognosis. Methods: Data on patients who were diagnosed with IPAH at Asan Medical Center between January 1994 and March 2013 were retrospectively collected. Acute vasodilator testing was performed with inhaled nitric oxide during diagnostic right heart catheterization. A positive acute response was defined as a reduction in mean pulmonary arterial pressure (PAP) =10 mm Hg to an absolute level of mean PAP <40 mm Hg without a decrease in cardiac output. Results: Among a total of 60 IPAH patients included for analysis, 9 (15%) showed a positive acute response to acute vasodilator testing. Acute responders showed significantly lower peak velocity of a tricuspid regurgitation jet on echocardiography (4.1 ± 0.3 m/s versus 4.6 ± 0.6 m/s; P = 0.01) and significantly lower mean PAP hemodynamically (47 ± 10 mm Hg versus 63 ± 17 mm Hg; P = 0.003) than non-responders at baseline. The survival rate of acute responders was 88% at 1, 3, 5, and 10 years, respectively, which was significantly higher than that of non-responders (85%, 71%, 55%, and 40%, respectively; P = 0.029). Conclusions: Korean IPAH patients with vasoreactivity showed better baseline hemodynamic features and survival than those without vasoreactivity.
Oxidation resistance of iron and copper foils coated with reduced graphene oxide multilayers.
Kang, Dongwoo,Kwon, Jee Youn,Cho, Hyun,Sim, Jae-Hyoung,Hwang, Hyun Sick,Kim, Chul Su,Kim, Yong Jung,Ruoff, Rodney S,Shin, Hyeon Suk American Chemical Society 2012 ACS NANO Vol.6 No.9
<P>Protecting the surface of metals such as Fe and Cu from oxidizing is of great importance due to their widespread use. Here, oxidation resistance of Fe and Cu foils was achieved by coating them with reduced graphene oxide (rG-O) sheets. The rG-O-coated Fe and Cu foils were prepared by transferring rG-O multilayers from a SiO(2) substrate onto them. The oxidation resistance of these rG-O-coated metal foils was investigated by Raman spectroscopy, optical microscopy, and scanning electron microscopy after heat treatment at 200 °C in air for 2 h. The bare metal surfaces were severely oxidized, but the rG-O-coated metal surfaces were protected from oxidation. This simple solution process using rG-O is one advantage of the present study.</P>
대학병원 근무 간호사의 교대근무가 심리적 변인들에 미치는 영향
강형곤,고유경,지영건,김수진,윤호,정우식,김명아,임지영 대한간호행정학회 2005 간호행정학회지 Vol.11 No.1
This study was conducted to assess the effects of shift-work on psychological factors in university hospital's nurses. Method: The subjects were 276 nurses who have worked in a university hospital and the nurses were questioned with self-reported questionnaire forms. We investigated psychological factors(anxiety, depression, stress and self-esteem), nurses' general characteristics and shift-work. The data was analyzed by using SAS for Windows 9.13. Results: The frequency of nurses with anxiety, depression and high stress were 56.5%, 44.9% and 19.6%, respectively. The mean score of self-esteem was 30.03. Stress was higher in cases of having shift-work. Immediately after doing shift-work, nurses had higher depression and stress, and lower self-esteem scores. After controlling confounding variables, psychological factors affected by shift-work was stress. An upward tendency in anxiety, depression and stress were found in cases of doing shift-work for more than 5 years. Conclusions: It is necessary to develope a program for reducing psychological disturbance at the early times of shift-work and to plan adequate shift-work intervals.
( Jee Hwan Ahn ),( Byung Ju Kang ),( Sun In Hong ),( Jung Su Lee ),( Jae Seung Lee ),( Yeon Mok Oh ),( Sang Do Lee ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: A vasoreactive subset of patients with idiopathic pulmonary arterial hypertension (IPAH) was noted in Western countries, which showed favorable prognosis with treatment with high-dose calcium channel blockers. We aimed to identify IPAH patients with vasoreactivity in Korea and to show their clinical characteristics and prognosis. Methods: Data on patients who were diagnosed with IPAH at Asan Medical Center between January 1994 and March 2013 were retrospectively collected. Acute vasodilator testing was performed with inhaled nitric oxide during diagnostic right heart catheterization. A positive acute response was defined as a reduction in mean pulmonary arterial pressure (PAP) =10 mm Hg to an absolute level of mean PAP <40 mm Hg without a decrease in cardiac output. Results: Among a total of 60 IPAH patients included for analysis, 9 (15%) showed a positive acute response to acute vasodilator testing. Acute responders showed signify-cantly lower peak velocity of a tricuspid regurgitation jet on echocardiography (4.1 ± 0.3 m/s versus 4.6 ± 0.6 m/s; P = 0.01) and significantly lower mean PAP hemodynamically (47 ± 10 mm Hg versus 63 ± 17 mm Hg; P = 0.003) than non-responders at baseline. The survival rate of acute responders was 88% at 1, 3, 5, and 10 years, respectively, which was significantly higher than that of non-responders (85%, 71%, 55%, and 40%, respectively; P = 0.029). Conclusions: Korean IPAH patients with vasoreactivity showed better baseline hemodynamic features and survival than those without vasoreactivity.
Kang, Jee In,Park, Hae-Jeong,Kim, Se Joo,Kim, Kyung Ran,Lee, Su Young,Lee, Eun,An, Suk Kyoon,Kwon, Jun Soo,Lee, Jong Doo Oxford University Press 2014 Schizophrenia bulletin Vol.40 No.3
<P><B>Background:</B></P><P>Altered transmission of gamma-aminobutyric acid (GABA), a major inhibitory neurotransmitter, may contribute to the development of schizophrenia. The purpose of the present study was to investigate the presence of GABA-A/benzodiazepine (BZ) receptor binding abnormalities in individuals at ultra-high risk (UHR) for psychosis in comparison with normal controls using [<SUP>18</SUP>F]-fluoroflumazenil (FFMZ) positron emission tomography (PET). In particular, we set regions of interest in the striatum (caudate, putamen, and nucleus accumbens) and medial temporal area (hippocampus and parahippocampal gyrus).</P><P><B>Methods:</B></P><P>Eleven BZ-naive people at UHR and 15 normal controls underwent PET scanning using [<SUP>18</SUP>F]-FFMZ to measure GABA-A/BZ receptor binding potential. The regional group differences between UHR individuals and normal controls were analyzed using Statistical Parametric Mapping 8 software. Participants were evaluated using the structured interview for prodromal syndromes and neurocognitive function tasks.</P><P><B>Results:</B></P><P>People at UHR demonstrated significantly reduced binding potential of GABA-A/BZ receptors in the right caudate.</P><P><B>Conclusions:</B></P><P>Altered GABAergic transmission and/or the imbalance of inhibitory and excitatory systems in the striatum may be present at the putative prodromal stage and play a pivotal role in the pathophysiology of psychosis.</P>