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Clinical investigation on acute pyelonephritis without pyuria: a retrospective observational study
( Hyung Keun Song ),( Dong Hyuk Shin ),( Ji Ung Na ),( Sang Kuk Han ),( Pil Cho Choi ),( Jang Hee Lee ) 영남대학교 의과대학 2022 Yeungnam University Journal of Medicine Vol.39 No.1
Background: The current guidelines for the diagnosis of acute pyelonephritis (APN) recommend that APN be diagnosed based on the clinical features and the presence of pyuria. However, we observed that some of the patients who are diagnosed with APN do not have characteristic clinical features or pyuria at the initial examination. We performed this study to investigate the characteristics of APN without pyuria. Methods: A retrospective, cross-sectional study was conducted on 391 patients diagnosed with APN based on clinical and radiologic findings, between 2015 and 2019. The clinical features, laboratory results, and computed tomography (CT) findings were compared between patients with normal white blood cell (WBC) counts and those with abnormal WBC counts (WBC of 0-5/high power field [HPF] vs. >5/HPF) in urine. Results: More than 50% of patients with APN had no typical urinary tract symptoms and one-third of them had no costovertebral angle (CVA) tenderness. Eighty-eight patients (22.5%) had normal WBC counts (0-5/HPF) on urine microscopy. There was a negative correlation between pyuria (WBC of >5/HPF) and previous antibiotic use (odds ratio, 0.249; 95% confidence interval, 0.140-0.441; p<0.001), and the probability of pyuria was reduced by 75.1% in patients who took antibiotics before visiting the emergency room. Conclusion: The diagnosis of APN should not be overlooked even if there are no typical clinical features, or urine microscopic examination is normal. If a patient has already taken antibiotics at the time of diagnosis, imaging studies such as CT should be performed more actively, regardless of the urinalysis results.
CO2 Recovery from Flue Gas by PSA Process using Activated Carbon
Na, Byung Ki,Koo, Kee Kahb,Eum, Hee Moon,Lee, Hwaung,Song, Hyung Keun 한국화학공학회 2001 Korean Journal of Chemical Engineering Vol.18 No.2
An experimental study was performed for the recovery of CO₂from flue gas of the electric power plant by pressure swing adsorption process. Activated carbon was used as an adsorbent. The equilibrium adsorption isotherms of pure component and breakthrough curves of their mixture (CO₂: N₂: O₂=17 : 79 : 4 vol%) were measured. Pressure equalization step and product purge step were added to basic 4-step PSA for the recovery of strong adsorbates. Through investigation of the effects of each step and total feed rate, highly concentrated CO₂could be obtained by increasing the adsorption time, product purge time, and evacuation time simultaneously with full pressure-equalization. Based on the basic results, the 3-bed, 8-step PSA cycle with the pressure equalization and product purge step was organized. Maximum product purity of CO₂was 99.8% and recovery was 34%.
Hyung Jun Kim,Ha-Na Song,Ji-Eun Lee,김윤철,In-Young Baek,Ye-Sel Kim,Jong-Won Chung,Tae Keun Jee,Je Young Yeon,Oh Young Bang,Gyeong-Moon Kim,Keon-Ha Kim,Jong-Soo Kim,Seung-Chyul Hong,Woo-Keun Seo,Pyeong J 대한뇌졸중학회 2021 Journal of stroke Vol.23 No.2
Background and Purpose Previous studies have assessed the relationship between cerebral vessel tortuosity and intracranial aneurysm (IA) based on two-dimensional brain image analysis. We evaluated the relationship between cerebral vessel tortuosity and IA according to the hemodynamic location using three-dimensional (3D) analysis and studied the effect of tortuosity on the recurrence of treated IA. Methods We collected clinical and imaging data from patients with IA and disease-free controls. IAs were categorized into outer curvature and bifurcation types. Computerized analysis of the images provided information on the length of the arterial segment and tortuosity of the cerebral arteries in 3D space. Results Data from 95 patients with IA and 95 controls were analyzed. Regarding parent vessel tortuosity index (TI; P<0.01), average TI (P<0.01), basilar artery (BA; P=0.02), left posterior cerebral artery (P=0.03), both vertebral arteries (VAs; P<0.01), and right internal carotid artery (P<0.01), there was a significant difference only in the outer curvature type compared with the control group. The outer curvature type was analyzed, and the occurrence of an IA was associated with increased TI of the parent vessel, average, BA, right middle cerebral artery, and both VAs in the logistic regression analysis. However, in all aneurysm cases, recanalization of the treated aneurysm was inversely associated with increased TI of the parent vessels. Conclusions TIs of intracranial arteries are associated with the occurrence of IA, especially in the outer curvature type. IAs with a high TI in the parent vessel showed good outcomes with endovascular treatment.
흡연이 대학생의 동적 폐기능과 운동자각도에 미치는 영향
나근영(Keun-Young Na),윤소영(So-Young Yoon),이동민(Dong-Min Lee),임형태(Hyung-Tae Yim),김기송(Ki-Song Kim) 대한심장호흡물리치료학회 2019 대한심장호흡물리치료학회지 Vol.7 No.1
Purpose : In this study, we assessed the dynamic pulmonary function and the rating of perceived exertion (RPE) to prepare the basic data for the health management of university students and to make the smoking rate suppression promotional data. Methods : The subjects were 20 healthy males (10 non-smokers and 10 smokers). Body Mass Index (BMI) was measured to minimize physical differences between groups. forced vital capacity (FVC) and maximum voluntary ventilation (MVV) were evaluated using a spirometer for dynamic pulmonary function test. Also, selected the Bruce protocol using treadmill to evaluate the RPE according to the exercise intensity. Data was analysed independent t-test using SPSS version 20.0. Results : FVC and MVV in dynamic pulmonary function test, significant differences between the groups (p<0.05), there was no significant difference in RPE between the groups (p>0.05). Conclusions : These results suggest that dynamic pulmonary function test could be more accruable estimating parameters to evaluate the aerobic capacity in healthy young males in accord to have or have not smoking habits.
Gwang Yeon Gi,Taek Sang Na,Ya Song Lee,Mi Hyang Jang,Kyung Cheuol Cho,In Taek Hwang,Joung Keun Kim,Hyung Ki Lim,Hong Jae Kim,Tae Ho Han 한국육종학회 2007 한국육종학회지 Vol.39 No.4
A new dark pink colored standard rose (Rosa hybrida Hort.) cultivar, 'Global Pink' was developed by the cross between 'Nobless' and 'Belami' at the Jeollanamdo Agricultural Research and Extention Services (JARES) through seedling and line selection in 2003 and characteristic evaluations during 2004~2006. 'Global Pink' showed Red purple group color (RHS No. 65B), very weak fragrance, and standard flower with good harmony between ray florlet and flower center. Its yield was 134 stems/m2 averaged over three years (2004-2007). It showed 10 days vase life and was resistant to powdery mildew. This cultivar was registered as a commercial cultivar in 2007. It can be cultured in greenhouses in Korea and will be released to the farmers in 2009.
유소아에서 발생한 Mycoplasma pneumoniae에 의한 괴사성 폐렴의 임상적 고찰
이나영 ( Na Young Lee ),허태형 ( Tae Hyung Hur ),송선화 ( Sun Wha Song ),이혜경 ( Hae Kyung Lee ),이근영 ( Keun Young Lee ),이현승 ( Hyun Seung Lee ),장필상 ( Pil Sang Jang ),김동언 ( Dong Un Kim ),김영훈 ( Young Hoon Kim ),김진택 대한소아알레르기 및 호흡기학회 2007 소아알레르기 및 호흡기학회지 Vol.17 No.3
MEK - 물 공비 혼합물의 공비증류에 관한 이론적 연구
김형규,나병기,송형근,한춘,이정석,정연수 한국화학공학회 1995 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.33 No.2
공비증류방법을 통해 최저 공비점을 형성하는 MEK(methyl ethyl ketone)-물 혼합물의 분리를 이론적으로 고찰하였다. 첨가제(entrainer) 조건을 만족시키는 물질들 중에서 MEK와 물 성분간의 분자간 친화력을 감안하고 무한희석 활동도 계수의 비와 상대휘발도를 이용하여 최적의 첨가제로 acetone을 선택하였다. 또한 증류탑 모사를 통하여 MEK-물-Acetone의 삼성분 혼합물에 대한 증류분리를 시도하였다. UNIFAC 모델로 single feed의 증류탑을 모사하여 조작조건들의 영향을 고찰한 결과, 최소 환류비가 0.6이 됨을 알 수 있었고 첨가제 양 및 환류비 변화에 따른 최적 급단수를 구할 수 있었다. 한편 첨가제의 양이 증가할수록 이상증류단수가 감소함이 확인되었다. 이를 통해 MEK 70몰%인 MEK-물 혼합물로부터 탑하부 생성물로서 95몰% MEK 조성으로 분리하는 경우, 환류비가 0.85이고 2배의 acetone이 사용되었을 때 최적 급단은 8단이 되며 이상증류단수는 가장 적은 13단의 결과를 얻었다. MEK(methyl ethyl ketone) cannot be separated from water by normal distillation because of the presence of minimum boiling azeotrope. However it can be separated by azeotropic distillation by adding entrainer. The best entrainer was selected by considering the ratio between infinite dilute activity coefficients of each component for suggested entrainers and relative volatilities. From this method, acetone was selected as the best entrainer for the MEK-Water system. When the distillation tower was simulated by the UNIFAC equilibrium model for this MEK-Water-Acetone system, the minimum reflux ratio was observed as 0.6. Also, the optimum feed-plate was calculated at each reflux ratio for various amounts of entrainer. Results indicated the number of ideal plates decreases with the amount of entrainer. As the best results, 13 ideal plates were required to obtain 95 mole% of MEK as the bottom product from 70 mole% of MEK of the MEK-Water solution when the reflux ratio and the ratio of entrainer to feed were 0.85 and 2, respectively. In this case, the optimum feed-plate location, which required the minimum number of ideal plates, was the eighth.