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심질환 병력이 없었던 중환자에서 B-type Natriuretic Peptide 검사의 유용성
김강호 ( Kim Gang Ho ),박홍훈 ( Park Hong Hun ),김에스더 ( Kim E Seu Deo ),천석철 ( Cheon Seog Cheol ),이지현 ( Lee Ji Hyeon ),이용구 ( Lee Yong Gu ),김인재 ( Kim In Jae ),차동훈 ( Cha Dong Hun ),김세현 ( Kim Se Hyeon ),최정은 ( Ch 대한결핵 및 호흡기학회 2003 Tuberculosis and Respiratory Diseases Vol.54 No.3
최정임 ( Jeong Im Choi ),한동수 ( Dong Soo Han ),김해수 ( Hae Su Kim ),이유화 ( Yu Hwa Lee ),김현수 ( Hyun Soo Kim ),안성은 ( Seong Eun Ahn ),전용철 ( Yong Cheol Jeon ),이주학 ( Joo Hark Yi ) 대한소화기학회 2013 대한소화기학회지 Vol.62 No.1
The metastatic calcification is defined as the deposition of calcium salt in normal tissue with an abnormal serum biochemical environment, such as chronic kidney disease, hyperparathyroidism, and hypercalcemia related with malignancy. Although the metastatic calcification can develop in any organs and tissues, presenting its symptoms and complications are rare. Thus a few cases have been reported. This case shows the metastatic calcification of the small intestine without any peritoneal and mesenteric vascular calcification which was early diagnosed by computed tomography and mesenteric angiography in a patient with abdominal pain, receiving continuous ambulatory peritoneal dialysis due to end stage renal disease. The clinician should early consider the metastatic calcification as differential diagnosis when unidentified calcifications are noted in simple abdominal X-ray such as in the present case, and promptly confirm it by using appropriate diagnostic tests in order to prevent its complications and progression. (Korean J Gastroenterol 2013; 62:55-58)
혐기 혼합균주에서 황산염 농도변화에 따른 수소 발효 특성
황재훈(Jae Hoon Hwang),최정아(Jeong A Choi),이종학(Jong Hak Lee),정태영(Tae Young Jeong),차기철(Gi Cheol Cha),송호철(Ho Cheol Song),용보영(Bo Young Yong),김동진(Dong Jin Kim),전병훈(Byong Hun Jeon) 大韓環境工學會 2009 대한환경공학회지 Vol.31 No.6
황산염의 농도변화에 따른 연속 혐기성 수소 발효에 미치는 영향을 고찰하기 위해서 혼합균주를 사용한 완전 혼합형 반응조를 운전하였다. 기질은 글루코오스를 사용하였고, 수리학적 체류시간은 1, 0.5, 0.25 일로 각각 고정하였다. 황산염 농도는 0~20,000 mg/L로 단계별 증가시켰고 pH 5.5로 운전하였다. 실험 결과 높은 황산염 농도에 관계없이 수소가 발생하였고, HRT 0.25일로 짧아짐에 따라 수소 발생이 높게 나타났다. HRT 1, 0.5, 0.25일 각 조건별 수소 생성량과 수소 수율은 2.9, 4.6, 9.4 L/day, 2.0, 1.8, 1.6 mol H₂/mol glucose로 나타났으며, 잔존 황산염 96~98, 95~97, 94~97%로 나타나 황산염 환원이 발생하지 않았다. FISH 결과 모든 조건에서 수소생성균의 분포는 나타났지만 황산염환원균의 분포는 나타나지 않았다. The effect of varying sulfate concentration on continuous fermentative hydrogen production was studied using enriched mixed microflora in continuously fed reactor. Glucose was used as a model substrate for carbohydrates, and hydraulic retention time (HRT) was maintained at 1, 0.5, 0.25 day, respectively. Sulfate concentration was 0~20,000 mg/L and the operating pH was maintained at 5.5. The experimental results indicate that hydrogen production is not affected by high sulfate concentration and shorter HRT of 0.25 day enhance hydrogen production. At HRT 1, 0.5, 0.25 day, the hydrogen production rate and hydrogen yield were 2.6, 4.6, 9.4 L/day, and 2.0, 1.8, 1.6 mol H₂/mol glucose, respectively. Residual sulfate content was 96~98, 95~97, and 94~97% at HRT 1, 0.5, 0.25 day which show that no sulfate reduction occurred in the reactor during the experiments. Results of Fluorescence In Situ Hybridization (FISH) may indicate the presence of HPB (hydrogen producing bacteria) under all experimental conditions. However, SRB (sulfate reducing bacteria) were not found.
호흡곤란을 주소로 내원한 환자에서 혈청 B-type Natriuretic Peptide 검사의 유용성: 폐성심과 좌심부전의 감별에 대하여
박홍훈 ( Park Hong Hun ),김세현 ( Kim Se Hyeon ),최정은 ( Choe Jeong Eun ),김강호 ( Kim Gang Ho ),천석철 ( Cheon Seog Cheol ),이지현 ( Lee Ji Hyeon ),이용구 ( Lee Yong Gu ),김인재 ( Kim In Jae ),차동훈 ( Cha Dong Hun ),홍상범 ( Ho 대한결핵 및 호흡기학회 2003 Tuberculosis and Respiratory Diseases Vol.54 No.3
년근별 인삼추출물의 사포닌함량 , 물리성 및 색도의 변화
김동철(Dong Cheol Kim),장상문(Sang Moon Chang),최정(Jyung Choi) 한국응용생명화학회 1995 Applied Biological Chemistry (Appl Biol Chem) Vol.38 No.1
For the quality management of ginseng root extracts and their products, the effective constituents contents, physical properties (pH, turbidity, viscosity, optical density) and color intenties of the extracts from white ginseng roots of different cultivating years. The sugar contents, lightness and yellow intensity of extracts from white ginseng roots increased with increased their cultivating yearn. The crude ash contents turbidity and optical density of extracts from white ginseng roots decreased with increased their cultivating y ears. Therefore, the extracts from white ginseng root of 5 or 6 cultivated years showed higher quality than the extracts from ginseng root of 4 cultivated years.
재배지토양의 화학성이 인삼근중의 당류 및 saponin 함량에 미치는 영향
김동철,장상문,최정 ( Dong Cheol Kim,Sang Moon Chang,Jyung Choi ) 한국응용생명화학회 1995 Applied Biological Chemistry (Appl Biol Chem) Vol.38 No.1
The relationships between the soil chemical properties of ginseng fields and the contents of effective constituents in ginseng roots was investigated. The NO₃-N contents in soils showed highly negative correlations with the contents of total sugar and reducing sugar in ginseng roots. The organic matter contents in soils showed positive correlations with the contents of sugar and ginoside in ginseng roots, while the contents of available phosphorus and exchangeable rations in soils showed highly negative correlations with the those in ginseng roots. For the Production of ginseng root of higher saponin contents, increase of the organic matter contents, and decrease of the contents of available phosphorus and exchangeable rations in soils were recommended.
점토광물(粘土鑛物)에 의한 Nitrofen 의 흡착 및 활성 변화
김동철,최정 한국환경농학회 1986 한국환경농학회지 Vol.5 No.1
粘土鑛物의 種類에 따른 Nitrofen의 吸着과 6種의 粘土鑛物과 小麥을 使用하여 粘土현탁액 中에서 Nitrofen의 活性變化를 調査하였다. Nitrofen은 粘土鑛物과의 현탁액 中에서 4時間의 진탕으로 거의 平衡濃度에 이르렀다. 試料量이 많을수록 Nitrofen의 吸着量이 增加되었으나, 試料 ; 溶液의 比率이 작은 편이 單位重量當 吸着量이 많았다. 粘土鑛物別로 볼 때 Nitrofen의 吸着量에는 큰 差異가 없었으나 Na-montmorillonite가 다소 많이 吸着하였으며 Nitrofen의 吸着에 pH의 影響은 거의 없었다. Growth media에 粘土鑛物을 添加한 結果, montmorillonite添加가 小麥의 沮害率을 減少시키는데 가장 效果的이었다. The nitrofen adsorption on several clay minerals was determined by sludge method to know the effect of clay minerals on the nitrofen activity. The bioassay was conducted with wheat seedlings to study the influence of the adsorbed nitrofen on the nitrofen activity. It is apparant that a four hours shaking was enough to reach the equilibrium concentration. The more the amount of sample, the more nitrofen was adsorbed by clay minerals, whereas the more nitrofen adsorption per unit gram of sample was observed at a 200 ㎎ addition than a 400 ㎎ in the same nitrofen solution. A little amount of nitrofen was adsorbed on Ca-zeolite or Ca-kaolinte, and much more nitrofen was adsorbed on Na-montmorillonite than the other clay minerals in the experiment. Little effect of pH on the adsorption would be attributed to physical adsorption between nitrofen molecule and clay surface. Na-and Ca-montmorillonite were the most effective in reducing the phytotoxicity of nitrofen to the growth of wheat seedlings among clay minerals which nitrofen was added to the growth media.