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증례 : 소화기; 알코올 간경변 환자에서 발생한 자발성 근육 내 혈종 3예
유동훈 ( Dong Hoon Lew ),최자윤 ( Ja Yoon Choi ),차라리 ( Ra Ri Cha ),오혜원 ( Hye Won Oh ),조윤원 ( Yun Won Jo ),민현주 ( Hyun Ju Min ),이옥재 ( Ok Jae Lee ) 대한내과학회 2014 대한내과학회지 Vol.86 No.4
자발성 근육 내 혈종은 간경변 환자에서 드물지만 치명적인 합병증이다. 저자들은 알코올 간경변 환자에서 자발적으로 발생한 근육 내 혈종 3예를 경험하여 보고하는 바이다. 출혈 혈관에 대하여 반복적인 경동맥 색전술을 시행하였음에도 불구하고 지속되는 출혈과 간부전으로 모두 사망하였다. 현재까지 보고된 간경변 환자에서 발생한 자발성 근육내 혈종 14증례에서 알코올 간경변 환자에서 가장 많이 발생하였으며 빠른 진단과 치료에도 불구하고 사망률이 높았다. 따라서 간경변 환자에서 발생하는 자발성 근육 내 혈종은 드물지만 예후가 매우 불량하여 이의 발생과 치료에 주의를 요한다. Liver cirrhosis is commonly associated with bleeding complications due to portal hypertension or coagulopathy. Spontaneous muscle hematoma is a rare but potentially lethal complication of liver cirrhosis. Here we report three cases of spontaneous muscle hematoma diagnosed in patients with alcoholic liver cirrhosis. All three patients died due to recurrent bleeding and liver failure although they had undergone repeated transcatheter arterial embolization of the actively bleeding vessels. We reviewed 14 cases of spontaneous muscle hematoma that were associated with liver cirrhosis, including our cases, and found that the mortality rate was86%, despite early diagnosis and treatment. Cirrhosis-associated spontaneous muscle hematoma occurred more frequently in patients with alcoholic liver cirrhosis, who accounted for -93% of cases. Thus, spontaneous muscle hematoma should be considered a life-threatening complication in patients with alcoholic liver cirrhosis, and abstinence from alcohol may help to prevent the occurrence of this deadly condition. (Korean J Med 2014;86:472-477)
고도정수처리 공정에서 DOC 분획 특성 및 AOX(FP)와의 관계
이병천(Byung Cheun Lee),최경희(Kyung Hee Choi),최자윤(Ja Yoon Choi),이철희(Chul Hee Lee) 大韓環境工學會 2009 대한환경공학회지 Vol.31 No.10
급수시스템에서 박테리아 재성장의 영양원이 되는 DOC를 정수처리 공정에서 효과적으로 저감시키기 위하여 생분해와 흡착으로 구분하여 네 종류의 DOC로 분획하였고 각각의 제거특성을 연구하였다. 네 종류의 분획 DOC는 흡착성을 가지면서 생분해성이 없는 AnBDOC, 흡착성이 없고 생분해성만이 있는 nABDOC, 흡착과 생분해성을 동시에 나타내는 ABDOC, 흡착과 생분해가 되지 않는 nAnBDOC로 구분하여 분석하였다. 낙동강 중류에 위치한 정수처리장 원수의 조사결과, ADOC가 BDOC보다 약간 높은 비율로 존재하고 있으며, 오존산화 후에는 분획 DOC 중에서 AnBDOC 농도가 가장 많이 제거되었으며, 제거율은 nAnBDOC가 49.5%로 가장 높았다. BAC 공정으로 제거된 분획 DOC 중에는 ADOC가 약 91%를 차지하고 있으므로 흡착에 의한 제거가 우수한 것으로 나타났고, 잔류하는 TDOC 0.50 mg/L 중에는 ADOC가 0.46 mg/L(67.7%)을 차지하고 있으므로 배수관내 미생물 증식 및 소독부생성물의 생성 방지를 위하여 BAC 공정상에서 EBCT증가, 재생주기 등의 운전조건을 개선해야 하는 것으로 나타났다. 정수처리 공정에서 DOC분획 결과로부터 흡착이나 생분해 등으로 제거 가능량을 파악할 수 있으므로 정수처리 공정에 유용한 것으로 나타났다. 염소처리하는 정수처리 공정에서 DOC분획 농도와 밀접한 관계를 가지는 AOX의 분석결과, AOX 7.1 μg/L은 오존산화와 활성탄흡착 공정으로 0.51 μg/L까지 충분히 제거되었다. As a part of dissolved organic matter, dissolved organic carbon (DOC) or biodegradable DOC (BDOC) fraction in particular is one of important issues in water treatment. Due to role as a nutrient source for bacteria, BDOC, therefore, may cause regrowth problems in water distribution system. The main objectives of this study were to investigate the possibility to minimize the concentration of BDOC in advance water treatment process. DOC in water is fractionized into four fractions such as AnBDOC (adsorbable and non-biodegradable DOC) which possesses adsorption properties but no biodegradation ability; nABDOC (biodegradable and non-adsorbable DOC) which has biodegradation properties but no adsorption ability; ABDOC (adsorbable and biodegradable DOC) which has adsorption properties and biodegradable characteristic; and non-removal DOC (nAnBDOC) which do not have either adsorbability or biodegradability. BAC process was effective for adsorbable DOC (AnBDOC+ABDOC) removal. However, in some cases, the removal ratio of adsorbable DOC was not sufficient. BDOC removal rate is very low or irremovable. Thus, for the control of residual DOC, it is necessary to change the operation condition by BAC process. From the analysis results of DOC fractions, water treatment processes appeared to be effective because it could grasp a remarkable amount of biodegradable, adsorbable and non-removal DOC. The concentration of AOX in non-prechlorination process was reduced from 7.1 μg/L to 0.51 μg/L in BAC process followed by ozonation.
연구보문 : 수질환경 ; 먹는샘물의 보관 기간에 따른 formaldehyde 및 acetaldehyde의 농도 변화
이연희 ( Youn Hee Lee ),이준배 ( Jun Bae Lee ),박주현 ( Ju Hyun Park ),최자윤 ( Ja Yoon Choi ),안경희 ( Kyung Hee Ahn ),안혜실 ( Hye Sil Ahn ),권오상 ( Oh Sang Kwon ),김태승 ( Tae Seung Kim ),한진석 ( Jin Suk Han ) 한국환경농학회 2011 한국환경농학회지 Vol.30 No.3
BACKGROUND: According to Korean regulations, bottled waters (BWs) can not be treated with chemical disinfectants like chlorine, so UV and ozone disinfection is applied. During the past several years, chemicals were detected in some BWs, and the public was concerned about the safety of BWs. METHODS AND RESULTS: Mineral waters were stored for 180 days at 25℃ and 50℃, tested acetaldehyde and formaldehyde by HPLC. When mineral waters were put in a PET bottles, the formaldehyde level ranged from 5 to 66 μg/L during 180 days at 50℃. While the acetaldehyde level ranged from 31 to 221 μg/L, it was low than 16 μg/L in glass bottle. CONCLUSION(s): This result showed that formaldehyde and acetaldehyde were detected higher in PET bottles than glass bottles, these also increased depending on the time of storage. Concentration of formaldehyde and acetaldehyde could be significantly influenced by the time of storage and temperature.
성충현 ( Seong Choung-hyun ),박승우 ( Park Seung-woo ),김상민 ( Kim Sang-min ),최자윤 ( Choi Ja-yoon ) 한국농공학회 2002 한국농공학회 학술대회초록집 Vol.2002 No.-
A hydrologic gauging network include a real-time measuring equipment was established within the Balhan watershed. Rainfall, stream water level, flow velocities were monitored at the six gauging stations. For stream flow gauging stations, the stage-discharge relationships were developed. The flow rate of the Balan watershed was 83.60% in 2001 and 48.79% in 2002.