http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
청주지역의 도심하천인 미호천에서 시공간적 수질변이 특성 및 유입지천의 영향
김지일 ( Ji Il Kim ),최지웅 ( Ji Woong Choi ),안광국 ( Kwang Guk An ) 한국환경과학회 2014 한국환경과학회지 Vol.23 No.3
The objective of study was to analyze seasonal and inter-annual patterns of water chemistry of Miho Stream watershed during 2004 - 2007 along with some influences of tributaries and summer monsoon on the stream water quality. For the study, eight physico-chemical parameters such as nitrogen, phosphorus, BOD, COD and chlorophyll-a (CHL) etc. were analyzed in relation to spatial and temporal variability of seven sampling sites of the mainstream and some tributaries in the watershed. In the upstream reach, Mean of BOD, COD and TP averaged 3.2 mg/L, 6.5 mg/L and 186 μg/L, respectively, indicating an eutrophic conditions as a III-rank in the stream water quality criteria from the Ministry of Environment, Korea(MEK). The eutrophic water was due to a combined effect of Chiljang tributary with high nutrients (TP=844 μg/L, TN=8.087 mg/L) and the point sources from some wastewater treatment plants. In the meantime, BOD, TN, and TP in the downstream reach were about > 1.2-1.5 folds than the values of the midstream reaches. This was mainly attributed to effluents of nutrient rich-water (mean TN: 11.980 mg/L) from two tributaries of Musim Stream and Suknam Stream, which is directly influenced by nearby wastewater disposal plants. Seasonal analysis of water chemistry showed that summer monsoon rainfall was one of the important factors influencing the water quality, and water quality had a large spatial heterogeneity during the rainfall period. In the premonsoon, BOD in the downstream averaged 6.0±2.47 mg/L, which was 1.4-fold greater than the mean of upstream reach. Mean of CHL-a as an indicator of primary productivity in the water body, was > 2.2 - 2.9 fold in the downstream than in the upstream, and this was a result of the high phosphorus loading from the watershed. Overall, our data suggest that some nutrient controls in point-source tributary streams are required for efficient water quality management of Miho Stream.
치료받지 않은 고혈압 환자에서 발생한 신동맥류의 자발성 파열
김지일 ( Kim Ji Il ),서학준 ( Seo Hag Jun ),신옥란 ( Sin Og Lan ),송선화 ( Song Seon Hwa ),황은미 ( Hwang Eun Mi ),주강 ( Ju Gang ),김영수 ( Kim Yeong Su ),윤선애 ( Yun Seon Ae ),김영옥 ( Kim Yeong Og ) 대한신장학회 2003 Kidney Research and Clinical Practice Vol.22 No.6
Spontaneous rupture of renal artery aneurysm is a rare, but life threatening complication with high mortality. The etiology of non-traumatic renal artery aneurysm is fibromuscular dysplasia, atherosclerosis, vasculitis, and pregnancy. We here report a case of spontaneous rupture of renal artery aneurysm in a patient with untreated hypertension. A 39-year-old non-pregnant woman complained of sudden onset of right flank and lower quadrant abdominal pain. Ul-trasonography showed large fluid collection in right lower abdomen. Emergency laparotomy demonstrated huge retroperitoneal hematoma due to spontaneous rupture of right renal artery aneurysm. Microscopic examination of the aneurysmal wall revealed intimal hyperplasia without atherosclerotic change. (Korean J Nephrol 2003;22(6):763-766)
김지일(Ji Il Kim),김정수(Jeong Soo Kim),전해명(Hae Myung Jeon),김응국(Eung Kook Kim) 대한소화기학회 1994 대한소화기학회지 Vol.26 No.3
Barium enema examination has long been regarded as an essential tool for evaluating the disease of colon and rectum. Although perforation of the colon and rectum during roentgen examination is extremely rare, but iatrogenic perforation lead to severe peritoni- tis or generalized sepsis. In a review of literatures, the reported mortality rate of barium peritonitis due to colonic perforation exceed 50 percent. The proper treatment consists of an immediate laparotomy with removal as much of contaminating material as possible. Recently, we experienced and report two cases of barium peritonitis after barium enema study with reviewing the literatures.(Korean J Gastroenterol 1994; 26: 614 618)
김지일(Kim, Ji-Il),박수진(Park, Soo-Jin) 한국신재생에너지학회 2011 한국신재생에너지학회 학술대회논문집 Vol.2011 No.05
In this work, porous carbon based electrodes are prepared by carbonization using poly(vinylidene fluoride) (PVDF)/carbon nanotube (CNT) composites to further increase the specific capacitance for supercapacitors. Electrode materials investigate the aspects of specific capacitance, pore size distribution and surface area: influence of carbonization temperatures of PVDF/CNT composites. The electrochemical properties are investigated by cyclic voltammetry, impedance spectra, and galvanostatic charge-discharge performance with in TEABF₄ (tetraethylammonium tetrafluoroborate)/acetonitrile as non-aqueous electrolyte. From the results, the highest value of specific capacitance of ~101 F{cdot}g^{-1} is obtained for the samples carbonized at 600?C. Furthermore, pore size of samples control be low 7 nm through carbonization process. It is suggested that micropores significantly contribute to the specific capacitance, resulting from improved charge transfer.
김지일(Kim, Ji-Il),박수진(Park, Soo-Jin) 한국신재생에너지학회 2011 한국신재생에너지학회 학술대회논문집 Vol.2011 No.05
In this work, the electrochemical properties of the surface treated multi-walled carbon nanotubes (MWNTs) are investigated for supercapacitors. Nitrogen- and oxygen functional groups containing MWNTs are prepared by nitrogen precursors and acidic treatment, respectively. The surface properties of the MWNTs are confirmed by X-ray photoelectron spectroscopy (XPS) and Zeta-potential measurements. The electrochemical properties of the MWNTs are investigated by cyclic voltammetry, impedance spectra, and charge-discharge cycling performance in 1 M H₂SO₄ at room temperature. As a result, these functionalized MWNTs lead to an increase in the specific capacitance as compared with the pristine MWNTs. It proposes that the pyridinic and pyridinic-N-oxides nitrogen species influence on the specific capacitance due to their positive charges, and thus an improved electron transfer at high current loads, since they are the most important functional groups affecting capacitive behaviors.