이동형 스크러버를 이용한 암모니아 및 톨루엔의 제거 효율

김재영 ( Jae-young Kim ),김장윤 ( Jang-yoon Kim ),이연희 ( Yeon Hee Lee ),김민선 ( Min Sun Kim ),김민수 ( Min-su Kim ),김현지 ( Hyun Ji Kim ),류태인 ( Tae In Ryu ),정재형 ( Jae Hyeong Jeong ),황승율 ( Seung-ryul Hwang ),김균 ( Ky 한국환경농학회 2018 한국환경농학회지 Vol.37 No.1

본 연구는 국내에서 다량 취급되고 있는 암모니아 및 톨루엔을 흄 상태로 노출시킨 후 흡수/흡착방법을 달리한 이동형 스크러버를 이용해 각 유해화학물질의 제거효율을 비교 분석하였다. 이동형 스크러버는 기 개발된 장치를 개선하여 와류세정에 의한 흡수, 유입풍속 조절의 장점을 살리고, 활성탄 및 카본필터를 통한 기체상 유해화학물질의 흡착방법 도입을 통해 단점을 보완하였다. 개선된 장치는 기초성능평가를 통해 적정 제어풍속이 검증되었고, 5% 암모니아수 용액을 흄 상태로 노출시켜 후드 흡입부, 송풍기 배출부 및 세정기가 정상 작동함을 확인하였다. 흡수/흡착방법에 따른 암모니아 제거효율은 90분 경과 후 C≥PCA>SWA 순으로 가장 우수한 SWA 군의 노출 농도별 제거 효율은 시간이 경과할수록 노출 농도와 무관하게 배출 농도는 증가되었고, 세정액의 pH는 산성에서 염기성으로 변화되었다. 또한, 시간 경과에 따른 노출 농도 별 세정액의 pH 변화와 배출구 농도 변화 사이에 0.9429~0.9491 수준의 정의 상관관계를 나타내었다. 흡착방법에 따른 톨루엔의 제거 효율은 초기 10분 경과 후 배출구농도에서 C>CMA≥GCA 순을 나타내다 90분 경과까지 일정한 농도로 유지되었다. 가장 우수한 GCA 군의 노출 농도 별 제거 효율은 초기 10분 경과 시 노출 농도에 비례하여 배출 농도가 높은 경향이었다. 이와 같은 결과를 통해 개선된 이동형 스크러버는 중화반응에 의해 산성 또는 염기성 유해화학물질의 제거뿐 아니라, 활성탄 등의 흡착기능 개선을 통해 VOCs 제거에도 효과적이었다. 하지만, 실제 현장에서 활용이 가능하도록 세정액 pH를 지속적으로 유지하여 연속적으로 흡수 제거할 수 있는 방법과 노출되는 화학물질 농도와 흡착제의 관계에서 파괴점, 포화점, 흡착속도 등의 물리적인 요소가 추가적인 연구를 통해 도출되어야 할 것이다. BACKGROUND: The mobile vortex wet scrubber was developed to remove the harmful chemicals from accidental releases. However, there was a disadvantage that it was limitedly used for volatile organic compounds (VOCs) such as toluene according to the physicochemical properties. This study compared the removal efficiencies of an improved mobile scrubber on toluene and ammonia by applying diverse adsorption and absorption methods. METHODS AND RESULTS: The removal efficiencies on harmful chemicals were examined using various adsorption and absorption methods of water vortex process (C), phosphoric acid-impregnated activated carbon adsorption (PCA), pH-controlled water (pH 2.5) vortex process absorption with sulfuric acid (SWA) after ammonia exposure, granular activated carbon adsorption (GCA), and activated carbon mat adsorption (CMA) after toluene exposure. As a result, the best removal efficiency was shown in the SWA for ammonia and GCA for toluene. Also, the SWA and GCA methods were compared with different concentration levels. In the case of ammonia exposure (5, 10 and 25%), there was no difference by concentration levels, and the concentration in the outlet gradually increased, with pH change from acid to base. In the case of toluene exposure (50, 75 and 100%), the outlet concentration was higher relative to the exposure concentration in the initial 10 min, but the outlet concentration was remained steady after 10 min. CONCLUSION: The newly improved mobile scrubber was also effective in removing VOCs through adsorption techniques (activated carbon, activated carbon fiber, carbon mat filter etc.), as well as removing acid-base harmful chemicals by neutralization reaction.

붕장어 부산물로 제조한 붕장어탕의 식품학적 특성

허민수(Min Soo Heu),이택상(Take Sang Lee),김혜숙(Hye-Suk Kim),지성준(Seung Joon Jee),이재형(Jae Hyoung Lee),김형준(Hyung Jun Kim),윤민석(Min Seok Yoon),박신호(Shin Ho Park),김진수(Jin-Soo Kim) 한국식품영양과학회 2008 한국식품영양과학회지 Vol.37 No.4

붕장어 가공부산물인 머리와 frame를 효율적으로 이용하기 위한 일련의 연구로 붕장어 부산물을 이용한 붕장어탕의 개발을 시도하였고, 아울러 이의 식품성분 특성에 대하여도 살펴보았다. 살균조건 및 가온일수에 따른 붕장어탕의 저장성 부여를 위한 최적 살균조건은 F? value=8분으로 판단되었다. 붕장어탕의 일반성분은 수분의 경우 90.7%, 조단백질의 경우 4.8%, 조지방의 경우 2.6%, 조회분의 경우 1.5%를 나타내었다. 붕장어탕의 엑스분 질소 함량은 243.1 ㎎/100 g으로 시판 추어탕의 208.0 ㎎/100 g보다 높았다. 붕장어탕의 총 아미노산 함량은 4,310 ㎎/100 g이었고, 주요 구성아미노산은 glutamic acid(637.3 ㎎/100 g, 14.8%), glycine(409.1 ㎎/100 g, 9.5%) 및 alanine(404.4 ㎎/100 g, 9.3%)등이었다. 붕장어탕은 관능적인 비린내는 거의 감지되지 않았고, 맛은 우수하였으며, 항산화능이 인정되었으나 ACE 저해능은 크게 기대할 수 없었다. For the effective use of the conger eel by-products, such as head and frame, Tang, which is the Korean-type soup, from conger eel by-products (TCEB) was developed and its food component characterization was compared with that of commercial Chueotang, loach Tang. According to the results of viable cells and coliform group of TCEB heated at 115oC for various times, the reasonable F0 value was 8 min. The proximate composition of TCEB was 90.7% for the moisture, 4.8% for the protein, 2.6% for the lipid, and 1.5% for the ash. The extractive-nitrogen content of TCEB was 243.1 ㎎/100 g, which was higher than that of commercial Chueotang, 208.0 ㎎/100 g. The total amino acid content of TCEB was 4,310 ㎎/100 g and its major amino acids were glutamic acid (637.3 ㎎/100 g, 14.8%), glycine (409.1 ㎎/100 g, 9.5%) and alanine (404.4 ㎎/100 g, 9.3%). TCEB was not felt in the sensual fish odor and its sensual taste was good. The health functional properties for health of TCEB were 1.29 as a PF (protection factor) for antioxidative activity and 39.4% for angiotensin Ⅰ converting enzyme (ACE) inhibiting activity.

Development of electrochemical biosensor for detection of pathogenic microorganism in Asian dust events

Yoo, Min-Sang,Shin, Minguk,Kim, Younghun,Jang, Min,Choi, Yoon-E,Park, Si Jae,Choi, Jonghoon,Lee, Jinyoung,Park, Chulhwan Elsevier 2017 CHEMOSPHERE - Vol.175 No.-

<P><B>Abstract</B></P> <P>We developed a single-walled carbon nanotubes (SWCNTs)-based electrochemical biosensor for the detection of <I>Bacillus subtilis,</I> one of the microorganisms observed in Asian dust events, which causes respiratory diseases such as asthma and pneumonia. SWCNTs plays the role of a transducer in biological antigen/antibody reaction for the electrical signal while 1-pyrenebutanoic acid succinimidyl ester (1-PBSE) and ant-<I>B. subtilis</I> were performed as a chemical linker and an acceptor, respectively, for the adhesion of target microorganism in the developed biosensor. The detection range (10<SUP>2</SUP>–10<SUP>10</SUP> CFU/mL) and the detection limit (10<SUP>2</SUP> CFU/mL) of the developed biosensor were identified while the response time was 10 min. The amount of target <I>B. subtilis</I> was the highest in the specificity test of the developed biosensor, compared with the other tested microorganisms (<I>Staphylococcus aureus</I>, <I>Flavobacterium psychrolimnae</I>, and <I>Aquabacterium commune</I>). In addition, target <I>B. subtilis</I> detected by the developed biosensor was observed by scanning electron microscope (SEM) analysis.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A SWCNTs-based biosensor was developed for the detection of <I>Bacillus subtilis.</I> </LI> <LI> The biosensor was composed of SWCNTs, 1-PBSE, and anti-<I>B. subtilis</I> antibody. </LI> <LI> The performance of the biosensor was assessed using a sensor sensitivity and specificity tests. </LI> <LI> The detection limit and detection range were 10<SUP>2</SUP> and 10<SUP>2</SUP>–10<SUP>10</SUP> CFU/mL, respectively. </LI> <LI> The detection time of the biosensor was identified as 10 min. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

철과 망간이 동시에 코팅된 반응성 매질을 이용한 용존 Fe(2) 제거

민상윤(Sang Yoon Min),장윤영(Yoon Young Chang),양재규(Jae Kyu Yang) 大韓環境工學會 2011 대한환경공학회지 Vol.33 No.2

본 연구에서는 산화망간과 산화철이 단독 및 복합 코팅된 반응성매질인 망간코팅사(MCS), 철코팅사(ICS) 그리고 철-망 간코팅사(IMCS)를 이용하여 용존 Fe(II)의 산화 및 제거능을 평가하였다. 반응성매질에 KMnO₄와 NaOCl를 추가적인 산화제로 이용하였을 때의 Fe(II) 제거능을 반응용액의 pH, 반응시간, Fe(II) 농도변화에 따라 조사하였다. 반응성매질 및 추가적인 산화제 없이 Fe(II) 용액만을 사용한 경우, pH 5 이하에서는 Fe(II)의 느린 산화에 의해 제거율이 낮았으나 이후에는 빠른 산화 및 침전반응에 의해 제거율이 증가하였다. ICS만을 사용하였을 때 ICS 표면에 의한 Fe(II)의 제거는 극히 제한적인 것으로 나타났다. 망간 산화물이 코팅된 IMCS와 MCS를 사용한 경우 낮은 pH에서도 Fe(II)가 산화망간에 의해 산화되었으며 용액으로부터 효과적으로 제거되는 것으로 나타났다. Fe(II)는 IMCS만 단독으로 사용했을 때와 NaOCl을 산화제로 사용했을 때 제거율에서 큰 차이가 나지 않았다. IMCS와 산화제를 이용하여 Fe(II)을 제거할 경우, 용액의 pH가 증가함에 따라 이들의 산화능이 증가하였고 이로써 전체 제거율의 증가를 가져왔다. Fe(II)의 제거에 관한 반응속도 실험결과 유사-1차 반응 보다는 유사-2차 반응 식으로 더 잘 표현되었으며 KMnO₄를 추가적인 산화제로 이용한 경우 Fe(II)는 14,286 mg/kg·hr의 높은 초기 제거율(h)을 보였다. KMnO₄ 주입 시 반응시간 10분 안에 제거평형에 도달하였고 NaOCl의 경우는 6시간 후에 거의 제거평형에 도달하는 것으로 나타났다. IMCS에 의한 Fe(II)의 최대 제거량 값을 구하기 위해 pH 4에서 Langmuir 등온식에 적용한 결과 1,088 mg/kg의 제거량을 보였다. Evaluation of the removal efficiencies of Fe(II) by reactive sand media coated with manganese (MCS), iron (ICS) and both of iron and manganese (IMCS) was investigated as functions of solution pH ranging from 2 to 9, reaction time and concentration of Fe(II) in a batch reactor using each reactive medium and additional oxidants such as KMnO₄ and NaOCl. When only Fe(II) was present in solution without any reactive medium, removal of Fe(II) was quite low below pH 5 due to a slow oxidation of Fe(II) and/or negligible precipitation but greatly increased above pH 5 due to a rapid oxidation of Fe(II) and subsequent precipitation of oxidized Fe species. ICS showed negligible efficiency on the removal of Fe(II) through adsorption. However, an efficient removal of Fe(II) was observed at low solution pH in the presence of IMCS or MCS through rapid oxidation and subsequent precipitation. Removal efficiency of Fe(II) by IMCS in the presence or absence of NaOCl was quite similar. Removal rate of Fe(II) by IMCS and additional oxidants gradually increased as the solution pH increased. From the kinetic experiments, removal pattern of Fe(II) was better described by pseudo-second-order equation than pseudo-first-order equation. A rapid removal of Fe(II) using IMCS in the presence of KMnO₄ was observed in the first 10 min. The initial removal rate of Fe(II) using KMnO₄ was 14,286 mg/kg·hr. In case of using NaOCl, the removal of Fe(II) occurred rapidly in the first 6 hrs and then reached the near-equilibrium state. Removal of Fe(II) on IMCS was well expressed by Langmuir isotherm and the maximum removal capacity of Fe(II) was calculated as 1,088 mg/kg.

Slide Session : OS-111 ; Sleep : The Effects of Dexmedetomidine for Sleep in Critically Ill Patients: Pilot Study

( Se Joong Kim ),( Jinsoo Min ),( Jisoo Park ),( Yeon Joo Lee ),( Jong Sun Park ),( Ho Il Yoon ),( Jae Ho Lee ),( Choon Taek Lee ),( Young Jae Cho ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

Background: Many critically ill patients in the intensive care unit (ICU) experience sleep disruption and delirium. For the sedation of these patients, dexmedetomidine is one of commonly recommended sedatives because of its pharmacokinetic merit. This pilot study was undertaken to identify the effects of dexmedetomidine for sleep and delirium in critically ill patients. Methods: This prospective study was conducted in medical ICU of a tertiary referral hospital. Dexmedetomidine was administered with the maintenance dose of 0.4-0.7μg/ kg/hr and adjusted by Richmond Agitation Sedation Scale score of 0 to -2. Portable polysomnography was performed in the ICU over 24 hour to assess the quantity and quality of sleep. The confusion assessment method for ICU was used for detection of delirium. Results: Total 9 patients were enrolled. Median age was 77.0 (Range: 61-90) and 3 patients experienced delirium. Median total sleep time was 283 (IQR: 56-739) min. The majority of sleep was stage 1 (median 208 [IQR: 56-356] min) and 2 (median 75 [IQR: 7-396] min) with absent REM and stage 3 sleep. The dose of dexmedetomidine was not associated with total sleep time, stage 1 and stage 2 sleep (all P>0.05). However, the patients with delirium was administered higher dose of dexmedetomidine than ones without delirium (0.67μg/kg/hr vs 0.33μg/kg/hr, P=0.006). Conclusions: Although proper sedation was met with dexmedetomidine, the quantity and quality of sleep in critically ill patients were poor. Further study is required for the promotion of good sleep and the prevention of delirium in ICU patients.

Free Paper Presentation : OS-111 ; The Effects of Dexmedetomidine for Sleep in Critically Ill Patients: Pilot Study

( Se Joong Kim ),( Jin Soo Min ),( Ji Soo Park ),( Yeon Joo Lee ),( Jong Sun Park ),( Ho Il Yoon ),( Jae Ho Lee ),( Choon Taek Lee ),( Young Jae Cho ) 대한결핵 및 호흡기학회 2014 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.118 No.-

Background: Many critically ill patients in the intensive care unit (ICU) experience sleep disruption and delirium. For the sedation of these patients, dexmedetomidine is one of commonly recommended sedatives because of its pharmacokinetic merit. This pilot study was undertaken to identify the effects of dexmedetomidine for sleep and delirium in critically ill patients. Methods: This prospective study was conducted in medical ICU of a tertiary referral hospital. Dexmedetomidine was administered with the maintenance dose of 0.4-0.7μg/kg/hr and adjusted by Richmond Agitation Sedation Scale score of 0 to -2. Portable polysomnography was performed in the ICU over 24 hour to assess the quantity and quality of sleep. The confusion assessment method for ICU was used for detection of delirium. Results: Total 9 patients were enrolled. Median age was 77.0 (Range: 61-90) and 3 patients experienced delirium. Median total sleep time was 283 (IQR: 56-739) min. The majority of sleep was stage 1 (median 208 [IQR: 56-356] min) and 2 (median 75 [IQR: 7-396] min) with absent REM and stage 3 sleep. The dose of dexmedetomidine was not associated with total sleep time, stage 1 and stage 2 sleep (all P>0.05). However, the patients with delirium was administered higher dose of dexmedetomidine than ones without delirium (0.67μg/kg/hr vs 0.33μg/kg/hr, P=0.006). Conclusions: Although proper sedation was met with dexmedetomidine, the quantity and quality of sleep in critically ill patients were poor. Further study is required for the promotion of good sleep and the prevention of delirium in ICU patients.

도심 수목원에서의 경관감상과 산책이 인체의 생리적 안정에 미치는 영향

박범진 ( Bum Jin Park ),가재남 ( Jae Nam Ka ),이민선 ( Min Sun Lee ),김선아 ( Seon A Kim ),박민우 ( Min Woo Park ),최윤호 ( Yoon Ho Choi ),정다워 ( Da Wou Joung ),권치원 ( Chi Weon Kwon ),염동걸 ( Dong Geol Yeom ),박순주 ( Soon Jo 한국산림과학회 2014 한국산림과학회지 Vol.103 No.4

This research was conducted to investigate the impact of viewing scenery and walking in the urban forest onphysiological relaxation of humans. The experiment was conducted in Hanbat Arboretum located in Daejeon, and thecontrol experiment was conducted in front of Daejeon City Hall. The subjects that participated in the experimentcomprised 24 Korean male university students in their 20s (average age, 21.1±2.5 years), participated in the experimentas the subject, and these subjects were classified into three groups divided into three locations such as the pine forest inArboretum, the pond in Arboretum, and the city. The subjects sat down and viewed scenery for 10 min, and they thenwalked for 15 min. Further, physiological changes were measured using indicators such as heart rate variability (HRV),blood pressure, and pulse rate. As a result, when subjects viewed scenery and walked in the urban forest, a statisticallysignificant increase in the high frequency (HF) power of HRV and decrease in systolic pressure was observed comparedwith when subjects viewed scenery and walked in the city. Through this research, it was found that activities like viewingscenery or walking in Arboretum of the city are effective in increasing the physiological relaxation of the city residents.

벌자상 후에 발생한 급성심근경색증 2례

민영기,정윤석,박인철,조준필,탁승제 대한응급의학회 2000 대한응급의학회지 Vol.11 No.3

Acute myocardial infarction after a bee sting is a very rare process. Among proposed mechanisms, vasospasm of the coronary artery ㅑs the most probable mechanism. Many mediators are included in the venom of wasps, and those mediators have vasoconstrictive properties and may constrict the coronary artery. Furthemore, those mediators have thrombogenic properties that lead to thrombogenesis in the coronary artery and aggravate myocardial ischemia. Epinephrine, commonly used in the management of anaphylactic shock, may further aggravate myocardial ischemia, We experienced two cases of acute myocardial infarction after a bee sting. In the first case, we could find no underlying abnormalities of the coronary vessel because the patient died during coronary angiography. In the second case, the electrocardiogram showed inferior wall myocardial infarction, but only mild stenosis of the right coronary artery was seen in coronary angiography.

Porphyromonas endodontalis 의 Lipopolysaccharide가 섬유아세포의 세포막 투과성에 미치는 영향

윤수한,김민겸,김재희 大韓齒科保存學會 1999 Restorative Dentistry & Endodontics Vol.24 No.3

백서의 일과성 국소허혈-재괄류 모델에서 U-74389G와 MK-801이 뇌경색 크기에 미치는 효과

김재일,김종민,양대웅,이근호,윤병우,노재규,이상복 대한신경과학회 1999 대한신경과학회지 Vol.17 No.1