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정준,김한순,김용재 ( Jun Chung,Han Soon Kim,Yong Jae Kim ) 한국하천호수학회 1994 생태와 환경 Vol.27 No.1
Species composition, standing crops and dominant species of phytoplankton community in the Nakdong river estuary dam were studied from May to November, 1991. A total 201 taxa were identified during the investigation period, and the most important group was Chlorophyceae with 156 taxa, followed by the Euglenophyceae with 24 taxa, Cyanophyceae with 13 taxa, Chrysophyceae with 4 taxa, Dinophyceae with 3 taxa and Xanthophyceae with 1 taxon. Standing crops were recorded the highest in May and the lowest in August. The contribution of Chlorophyceae to the total standing crops were the highest during the all survey period except in August which Cyanophyceae constituted the largest share. The Chlorococcales of Chlorophyceae- Micractinium pusillum, Actinastrum hantzschii var. fluviatile were dominant taxa in May, September and November, and Oscillatoria limnetica was dominant species in August.
내시경적 Unroofing 방법으로 진단한 직장 Mucosa-associated Lymphoid Tissue 림프종
박현수 ( Hyeon Su Park ),정준원 ( Jun Won Chung ),김애진 ( Ae Jin Kim ),박수용 ( Soo Yong Park ),임민영 ( Min Young Rim ),장영락 ( Young Rak Jang ),이재훈 ( Jae Hoon Lee ),박상희 ( Sang Hui Park ) 대한소화기학회 2012 대한소화기학회지 Vol.59 No.6
Mucosa-associated lymphoid tissue (MALT) lymphoma is a typical primary gastrointestinal lymphoma, particularly in the stomach. Although primary rectal lymphoma is rare, it may present as a subepithelial tumor. Several techniques have been proposed for a tissue diagnosis in subepithelial tumor, including endoscopic ultrasonography (EUS)-guided fine needle aspiration (EUS-FNA), EUS-guided trucut biopsy (EUS-TCB), and tacked biopsy. However the diagnostic efficacy of these techniques appears to be limited. The unroofing technique involves removal of the overlying mucosa, thereby exposing the subepithelial lesion. It was originally reported as a method for endoscopic treatment of colorectal lymphangioma. In this case, a subepithelial tumor of the rectum was diagnosed using the endoscopic unroofing technique. This is a useful modality for the diagnosis of subepithelial tumor, because it provides histologic results in a safe and rapid manner. (Korean J Gastroenterol 2012;59:428-432)
급성 췌장염의 진단에 있어서 Urinary Trypsinogen-2 Dipstick 검사의 유용성
황성준 ( Seoung Joon Hwang ),정준표 ( Jun Pyo Chung ),김영균 ( Young Gyun Kim ),송대훈 ( Dae Hoon Song ),이재성 ( Jae Sung Lee ),백승석 ( Seung Seok Baek ),김도연 ( Do Yun Kim ),이덕용 ( Dok Yong Lee ),정연수 ( Yon Soo Jeong ) 대한소화기학회 2004 대한소화기학회지 Vol.43 No.6
Background/Aims: The clinical usefulness of urinary trypsinogen-2 dipstick test is still in controversy. We evaluated the usefulness of urinary trypsinogen-2 dipstick test in patients with acute pancreatitis. Methods: Urinary trypsinogen-2 dipstick test was prospectively performed in 50 patients with acute pancreatitis, 50 patients with non-pancreatic abdominal pain, and 50 healthy controls. Results: On admission, urinary trypsinogen-2 dipstick test was positive in 36 of 50 patients with acute pancreatitis (sensitivity, 72%) and in 4 of 50 patients with non-pancreatic abdominal pain (specificity, 92%). On the other hand, it was all negative in controls. The sensitivity and specificity of serum lipase were 78% and 94%, respectively. At 24 hours after admission, the positive rate of urinary trypsinogen-2 dipstick test rose from 72% to 94% (p=0.02). The results of urinary trypsinogen-2 dipstick test was positive in 14 of 15 patients with severe pancreatitis and 22 of 35 patients with mild pancreatitis according to the criteria by Atlanta International Symposium, 1992. Conclusions: Urinary trypsinogen-2 dipstick test is comparable to serum lipase in diagnosing acute pancreatitis. Delayed measurement and severe pancreatitis are more likely to yield positive results with urinary trypsinogen-2 dipstick test. Thus, we suggest that the cut-off value of urinary trypsinogen-2 dipstick test should be lowered to increase its sensitivity. (Korean J Gastro-enterol 2004;43:364-369)
이헌남 ( Heon Nam Lee ),정준원 ( Jun Won Chung ),김윤재 ( Yoon Jae Kim ),김의주 ( Eui Joo Kim ),박성근 ( Sung Keun Park ),오경용 ( Kyong Yong Oh ),이영준 ( Young Jun Lee ) 대한내과학회 2012 대한내과학회지 Vol.82 No.5
Cameron ulcers are gastric ulcers or erosions located at mucosal folds in patients with large hiatal hernias. Mechanical trauma, gastric acid injury, or ischemia can cause their formation. Cameron ulcers are frequently seen as incidental findings during upper gastrointestinal endoscopy. About half of patients with these lesions are asymptomatic. However, Cameron ulcers are related to iron deficiency anemia and gastrointestinal bleeding in some cases. Here, we report a case of Cameron ulcers presenting with melena, which was successfully treated with proton pump inhibitors and iron supplementation. (Korean J Med 2012;82:585-588)
김용재,정준 ( Yong Jae Kim,Jun Chung ) 한국하천호수학회 1993 생태와 환경 Vol.26 No.3
This study investigated to the composition of phytoplankton community and its ecological factors in the Imha lake changed from the stream environment to the lake environment as the result by the construction of a multiple-purpose dam from Mar. to Dec. in 1992. Phytoplankton community was total 234 taxa composed of 7 class, 14 orders, 6 suborders, 39 families, 95 genera, 199 species, 25 variaties, 3 forma and 7 unidendifed species. The occurred taxa at each station and season ranged from 25 taxa at station 2 on May to 62 taxa at station 4 on May, which were very the wide variations at each station and season. The changes of standing crops were the maximum as 1.5×10^7unit/ℓat station 1 on Mar. and the minimum as 2.9×10^5unit/ℓat station 3 on Mar. Dominant Species were Achnanthes minutissima, Aulacoseira granulata var. angustissima, Cyclotella stelligera, Cymbella minuta var. silesiaca, Coelastrum cambricum, Phacotus lenticularis and Synedra delicatissima var. angustissima. The dominance index ranged from 0.15 to 0.76, and the diversity was very wide as the range from 0.23 to 1.05, also evenness diversed such as two index. The cluster analysis by similarity appeared the high relations with Aug. and Sept. at station 2 and the index was 0.88. Of the relationships between standing crops and physico-chemical factors, it was not the regularity between standing crop and chlorophyll concentration, and ranged from 0.89 at station 2 to negative index at other stations. Of dominant species, the relationships between Cyclotella stelligera and chlorophyll concentrations were the positive relations as up to 0.65 at all stations except to station 4.
보문호에서의 훈장말 속 ( 녹조강 ) 에 대한 계절적 변화
김용재,정준 ( Yong Jae Kim,Jun Chung ) 한국하천호수학회 1992 생태와 환경 Vol.25 No.4
This study compared the seasonal variations of the species composition and standing crops of the genus Pediastrum in the steady state and the nonsteady state of water environment in the Pomun Lake from November, 1990 to October, 1991. It was identified 15 taxa which were 8 species, 7 varieties in the genus Pediastrum from this lake. The variations of monthly taxa numbers were from 11 taxa in November, 1990 to 4 taxa in August, 1991. The variations of standing crops were from 7.5×10^4 unit/l in November, 1990 to 8×10^2 unit/l in August, 1991, respectively. It was a positive correlation between the standing crops and physico-chemical factors (e.g. pH, water temperature, transparency, NH_4- N, PO_4- P). Also, the chlorophyll-a concentration was closely correlated with the changes of standing crops. In the steady state of water environment, the regular seasonal variations were the autogenic changes by the self-activity of the genus Pediastrum, but in the nonsteady state, the irregular seasonalities were the allogenic changes by the external factors(e. g. influx of external polluted material, and vertical and horizontal mixing by a localized torriential downpour), and retarded the velocity and disturbed the courses of succession.
보문호에서의 (普門湖) Pediastrum clathratum ( Schroeter ) Lemmermann ( 녹엽망 (綠葉綱) 의 천이와 (遷移) 생태형
김용재,정준 ( Yong Jae Kim,Jun Chung ) 한국환경생물학회 1993 환경생물 : 환경생물학회지 Vol.11 No.1
According to the environmental fluctuations, it was changed with not only physico-chemical factors but also biological species composition and standing crops. In this water system, the authors investigated the total standing crops, standing crops and composition ratio of each morphotype of Pediastrum clathratum from Nov. 1990 to Oct. 1991 and established the ecotype. Physico-chemical factors were changed uniformly in the steady state water system, but changed dramatically as the nonsteady state from June to Oct. 1991 by a torrential rain. Changes of standing crops of P. clathratum were ranged from the 7.0×10 exp (4)unit/ℓ in Nov. 1990 to 1×10 exp (2)unit/ℓ in Aug. and Sept. 1991. Of seasonal changes of each morphotype, A-2 morphotype occurred during the all months and showed the highest standing crops and composition ratio. Therefore, the authors treat A -2 morphotype as the ecotype (e.g. P. biwae form) by the seasonal changes of steady state, eury-adaptation, the highest standing crops and composition ratio.