PBDEs and their structural analogues in marine environments: Fate and expected formation mechanisms compared with diverse environments

Choo, Gyojin,Kim, Da-Hye,Kim, Un-Jung,Lee, In-Seok,Oh, Jeong-Eun Elsevier 2018 Journal of hazardous materials Vol.343 No.-

<P><B>Abstract</B></P> <P>The concentrations and relative distributions of 27 polybrominated diphenyl ethers (PBDEs) and 17 methoxylated (MeO-) and 8 hydroxylated (OH-) BDEs were determined in marine environments including sediments, bivalves, and seawater along the southern coast of South Korea to understand their fates and possible formation mechanisms. The relative and substituent distributions of the PBDEs and their structural analogues varied according to the characteristics of the media. PBDEs were dominant in marine sediments and seawater, whereas MeO-BDEs made the highest contributions in bivalves. Similar patterns were previously identified in inland environments in Korea, except in river water where OH-BDEs were dominant. The natural formation of structural analogues might be the main mechanism in marine, as <I>ortho</I>-substituted naturally occurring MeO- and OH-BDEs were dominant in all media and seemed to be more produced than in inland environments. In addition, the higher concentrations of meta-substituted MeO-BDEs nearshore than offshore was observed. This is the first study comparing marine (near- and offshore) and inland to understand the differences in their fate and possible formation mechanisms in each environmental conditions.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The distributions of PBDEs and their structural analogues were compared between marine (near- and offshore) and inland. </LI> <LI> PBDEs dominated in abiotic media, whereas MeO-BDEs were dominant in biota. </LI> <LI> Natural formation might be the main mechanism for PBDE structural analogues in marine and was highly occurred than in inland. </LI> <LI> The higher contributions of meta-MeO-BDEs were observed in inland and nearshore than offshore. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

乾癬患者 臨床報告

吳恩英,朴惠宣,池鮮渶,具德謨 동의대학교 한의학연구소 2001 동의ㆍ경산 한의학 학술대회 Vol.5 No.-

A Reports were done on proriasis which were treated by medications of Sasang Constitution and Constitution-Acupunture in Dept. surgery, opthalmology &tolaryngology, college of Oriental Medicine, Kyungsan University, Pohang, Korea, from May 30. 2000 to JUN 30 2001. we gave score and checked involvement, plaque, erythematous popules, invasiveness according to psoriasis area and severity index. The results were as follows: 1. Sasang Constitution classification was Soyanggin 14(93.33%), Taeumgin 1(6.67%) in the 15 cases. Hyungbangsabaeksan is used in 9 cases(60%), Yanggeuksanhoatang is used in 3 cases(13.11%), Geopungchunggisan is used in 3 cases(20%), Hyungbangdojucksan is used in 1 case(6.57%). 2. In the 9 cases, we checked for over 4 weeks, clinical severity of involvement, plaque, total score(psoriasis area and severity index) was siginificantly decreased(p<05). clinical severity of erythematous popules, itching was decreased but lt is not siginificant(p>05). 3. The mean duration of treatmemt was 73.3 days, result of Excellent or Good improvement was showed on over 120 days. These resilts indicate that Sasang Constitution and Constitution-Acupuntuer treatment is effetive on psoriasis and the more study is needed.

면접조사를 통한 초등학생의 영양교육 실태 및 실천도 조사

오유진,이영미,김정현,안홍석,김정원,박혜련,서정숙,김경원,권오란,박혜경,이은주,성현이 대한지역사회영양학회 2008 대한지역사회영양학회지 Vol.13 No.4

This study investigated the experience and practice of elementary school students on nutrition education. The data were collected from 217 male and female students attending 5-6th grade elementary schools in Seoul and Kyunggi-Do from March to June 2007, interviewing face to face by a nutrition teacher and 3 interns of a nutrition teacher. The results were as follows: 86.5% of the subjects learned about ‘Table etiquette’, ‘Reasons for eating fruits and vegetables’ (78.7%), ‘Food waste and environment’ (72.3%), ‘Healthy snacks’ (55.7%), ‘Food sanitation’ (52.3%), ‘Food culture of foreign countries’ (48.1%). Nutrition education experience was significantly different by gender. A total of 43.5% boys responded that they never learned about ‘basic food preperation’ (p < 0.01). They had learned ‘Nutrients for body’ and ‘Food waste and environment’ in school, ‘Healthy weight loss’, ‘Food culture of foreign countries’, ‘Food circulation’ on television, Most content (‘Table etiquette’, ‘Simple cooking’, ‘Food sanitati n’, ‘Eating behaviors for health’, ‘Reasons for eating fruits and vegetables’, ‘Healthy snacks’) was learned from parents. The practice after nutrition education was higher in ‘Table etiquette’ (2.14), ‘Eating fruits and vegetables’ (2.07) than others compared with education experience. The most reason of non-practice on nutrition information was ‘Troublesome’. In ‘Nutrients for body’, a boy answered ‘Difficult for practice’ 20.0%, a girl answered ‘Difficult to understand’ 32.6%, showing a significant difference between the gender groups (p < 0.001). They remembered the ‘Nutrients for body’ (49.6%), ‘Food sanitation’ (44.5%) because of ‘important content’,‘Basic food preparation’ (40.6%), ‘Food culture of foreign countries’ (36.3%) because of ‘interesting content’, ‘Healthy weight loss’ (52.0%), ‘Eating behavior for health’ (44.5%) and ‘Healthy snacks’ (33.7%) because of ‘need for my health’.

숙명박물관 브랜드 프로모션을 위한 통합적 브랜드 개발 -2D, 3D, 4D 디자인 프로세스를 중심으로-

길혜경,김보현,오정은,이서연,이지원,이진민,장미정,이성애 숙명여자대학교 산업디자인연구소 2017 숙명디자인학 연구 Vol.24 No.-

본 연구는 여성생활사 중심의 유물 박물관인 숙명박물관의 인지도와 브랜딩의 문제를 해결하기 위해 브랜드·스페이스·마케팅을 활용한 통합 브랜드 개발 프로세스를 제안하는데 목적이 있다. 아울러 본 연구는 박물관의 브랜드를 프로모션하고 그래픽, 제품, 공간의 통합 브랜드를 구축하는 일련의 프로세스를 밝히는데 목적이 있다. 이에 본 연구의 시간적 범위는 2017년 3월부터 6월까지 총 15주간 숙명여대 환경디자인학과 <브랜드·스페이스·마케팅>수업에서 진행된 수업의 결과물로서 4개 팀 중, 1개 팀의 작업물로 한다. 본 연구의 대상적 범위는 ‘숙명여자대학교 숙명박물관'의 2D~4D까지의 전반으로 설정한다. 그 결과, 제품부터 공간까지 숙명박물관의 통합된 브랜딩은 일 관성과 객관성, 스토리성을 얻을 수 있었다. ’숙명박물관'은 학교의 박물관이라는 장점을 극대화시켜 가치와 스토리를 부여하고 하나의 브랜드로 리뉴얼했다는 점에서 의의가 있다. 또한 향후 보편적인 박물관들의 차별화된 브랜드 개발의 참고자료로 활용될 수 있을 것으로 기대하며 브랜드 개발에 있어서 G·I, P·I, S·I의 통합 브랜드 메뉴의 기초 자료로 활용될 것으로 사료된다.

유용성 도료와 수용성 도료의 유해성 비교에 관한 연구 : 자동차 보수용 도료를 중심으로

권은혜,김광식,오정룡,최정근,정윤석,이유진,김은아,송세욱,정호근 한국산업위생학회 2001 한국산업보건학회지 Vol.11 No.1

The purpose of this study is to substitute water-based painting materials for the current solvent-based ones used in motor-repairing process to minimize the exposure of organic solvents to the painters. This study assessed the exposure of organic solvents to the painters using water-based and solvent-based painting materials and compared compositions, painting processes and the health hazards of the application of these alternative painting materials. The results of this study are as follows. 1. solvent-based painting materials used in motor-repairing process consist of various organic solvents, which consist primarily of toluene, xylene, ethyl benzene, ethyl methyl bezene, trimethyl bezene, ethyl acetate, butyl acetate, methyl isobutyl ketone, 2-ethoxy ethanol, 2-ethoxy ethyl acetate and toluene-2.4-diisocianate and the others. These organic solvents are know as health-hazardous substances. But water-based painting materials are high-solid, low-solvent ones and consist of such two organic solvents as 2-butoxy ethanol and 2-heptanone and the others. 2. The painters using solvent-based painting materials in motor-repairing process are exposed to various organic acetate, methyl isobutyl ketone, trimethyl benzene, 2-ethoxy ethanol, and 2-ethoxy ethyl acetate. But the painters using solvent-based ones are only exposed to 2-butoxy ethanol and 2-heptanone. 3. By using water-based painting materials in stead of solvent-based painting materials containing health-hazardous organic solvents, the exposure of such organic solvents in the painter's breathing zone can be largely prevented. 4. This study recommends water-based painting materials as substitutes for the current solvent-based ones used in motor-repairing process to minimize the exposure of organic solvents to the painters.

상악 절치부에 매복된 다수 과잉치의 외과적 발거

홍은혜,김성오,이제호,최형준,송흥규,최병재 大韓小兒齒科學會 2008 大韓小兒齒科學會誌 Vol.35 No.2

과잉치란 정상에 비해 많은 수의 치아를 일컫는 것으로 유치열기와 혼합치열기에 발생하며,여러 가지 임상적 문제를 일으킬 수 있다. 특히 상악 전치부의 과잉치는 상악 전치의 맹출 장애 및 전위,정중부의 치간 이개,치근 흡수,함치성 낭종 형성 등의 문제를 유발할 수 있으므로 조기에 진단하고,과잉치의 위치 및 수,형태에 따라 적절한 치료를 시행하는 것이 중요하다. 이 증례는 상악 전치부에 네 개의 과잉치가 영구치의 맹출을 방해하고 있는 경우로,발거 시 합병증을 최소화하기 위하여 두 단계로 나누어 발거하였다. 컴퓨터 단층 촬영에서 네 개의 과잉치가 주위의 영구치 맹출을 방해하고 있었고,그 중 두 개의 과잉치는 절치 치배에 매우 근접해 있었다. 네 개의 과잉치를 동시에 제거할 경우 영구 치배에 손상을 줄 위험이 있으므로 두 개의 역위 매복된 원추형의 과잉치만 먼저 발거하였다. 남은 두 개의 과잉치는 위치가 변화되기를 기다린 후 두 번째 발거 수술을 시행하여,주위 절치 치배에 손상을 가하지 않고 치조골 삭제를 적게 하여 합병증 발생을 줄일 수 있었다. Supernumerary teeth are characterized by an excess number of teeth, which can be responsible for a variety of irregularities in the primary and transitional dentition, Supernumerary teeth, especially in the maxillary anterior region, may prevent the eruption of adjacent permanent teeth and cause their ectopic eruption, diastema, root resorption, or formation of dentigerous cyst. Therefore, early diagnosis of supernumerary teeth is important for prevention of such complications, and adequate treatment should be given according to their location, number, and morphologic features. In this case. four supernumerary teeth in the maxillary anterior region were disturbing the eruption of adjacent permanent incisors. Two of them were located in proximity to the central incisor tooth germs that their immediate removal may injure the permanent tooth germs, In order to minimize such complications, surgical extraction of the four supernumerary teeth was performed in two stages. At first, only two inverted conical supernumerary teeth were extracted. The other two tuberculous supernumerary teeth, close to the permanent tooth germs, were extracted later after their natural dislocation, In that way, we could minimize affects on the neighboring permanent tooth germs and also the amount of alveolar bone removed during surgery.

복수과 진료 환자의 중복 처방에 대한 분석 및 평가

이지은,장혜경,오지영,유윤경,김현지,임숙인,연숙희,강진숙,최귀령 한국병원약사회 2003 병원약사회지 Vol.20 No.1

In an aging society, there is an increasing possibility of the duplication of the drugs given to patients because they take many kinds of drugs. Among the prescriptions given to the patients who was treated at multiple ambulatory clinics in St. Mary's hospital for one month of September, 2002, in which drugs that has identical or similar effects are prescribed, we analysed and evaluated them by patients' characteristics, kinds of medication, severity of side effects on a case by case basis. More, we assessed the potential additional costs. As a result of this study, the duplication rate turned out to be 6.69% and it was shown that the proportion of the elderly patients over 60 was high. The gastro-intestinal medications took up a large part and most of the cases showed that the danger caused by double taking of medicine was slight, but there were some examples in which the serious side effects were predicted. Expected additional costs were the average 11.349 won and it ranges from the minimum of 56 won to the maximum of 135,720 won. In conclusion, the management of drug histories of the patients who need the plural treatments is very important and the necessity of the individual and professional guidance of taking medicines for the elderly patients is emerged, too.

화학증폭형 감광제의 전산모사를 위한 PEB 변수 추출

서은정,오혜근 한양대학교 이학기술연구소 2002 이학기술연구지 Vol.4 No.-

노광 후 열처리 시 전열처리 후에 남아있던 유기 용매와 잔여물들이 중발하고 비보호 반응에 의한 다중 폴리머들이 분해되면서 자유 공간이 줄어들어 감광제의 두께가 줄어들며 동시에 감광제의 광학 상수들이 변한다. 이전에는 투과도 변화와 두께 변화를 측정한 후 다중 박막 간섭 이론을 적용하여 흡수계수를 구한 후 이를 이용하여 PEB 변수들을 구했었다. 하지만 실제 양산 라인에서 실리콘 웨이퍼를 사용할 경우 투과도 측정이 쉽지 않으므로 이러한 문제점을 극복하고자 계산한 k 대신에 실제로 n&k analyzer 로 측정한 흡수계수 k 를 적용하여 새로이 PEB 변수들을 추출해 보았다. 여러 열처리 조건에 따른 감광제의 특성 변화를 측정할 수 있었고, 그 결과를 사용하여 각 조건별 비보호 영역의 농도인 C_(as) 의 변화를 구하였다. The remaining solvent and residue evaporate during post exposure bake and the polymer is decomposed by do-protection reaction, and as a result the thickness reduction of photoresist eventually takes place. The optical parameters such as n and t of photoresist change from this physical property change during post exposure bake. The previous method to define post exposure bake parameters was measuring the transmittance and thickness variations of the resist to find absorption coefficient changes by applying multiple thin film interference theory to the measured data. However, it is not easy to measure the transmittance in a practical fabrication condition use of Si-wafer process. The absorption coefficient k was directly measured by n&k analyzer instead of using calculated one in order to get over this difficulty and the measured k is used to obtain the post exposure bake parameters. Various characteristic changes of the resist have been observed with respect to the various bake conditions and the concentration of do-protected site, C_(as) can be obtained for each condition.

193 nm 용 화학 증폭형 감광제의 노광 후 열처리 과정 중 두께변화에 관한 연구

이은미,오혜근 한양대학교 이학기술연구소 2001 이학기술연구지 Vol.3 No.-

화학 증폭형 감광제의 중요한 특징 중 하나는 노광 후 열처리 과정에서 열처리 동안 화학적 반응이 증가하므로 열처리 조건에 따라 노광 된 영역의 감광제의 두께가 변한다는 사실이다. 그러나 지금까지는 이러한 사실을 무시한 채 시뮬레이션이 행해졌었다. 시뮬레이션에 있어서 좀더 정확한 결과를 얻기 위해서는 이러한 두께 감소 효과를 잘 표현해 줄 수 있는 더 나은 시뮬레이터가 필요하다. 본 논문에서는 노광 후 열처리 전후의 193 nm 용 화학 증폭형 감광제의 두께 변화를 측정하였으며 deprotected site의 농도 (Cas)와 두께 변화 사이의 관계를 추출해 내었다. 그리고 이를 자체 개발 시뮬레이터에 적용시켰으며 이것으로 더욱 실제와 가까운 감광제 프로파일을 얻을 수 있었다. 이 시뮬레이션은 탑 라운딩, 측면각, 초점 여유도, 노광량 감소 면에서 향상된 결과를 보여주었다. The chemical reaction is increased during post exposure bake and consequently the thickness of resist in the exposed area is physically reduced in most deep UV and 193 nm chemically amplified resists. However, the current simulator can only depict qualitative result without showing the desired quantitative result, so the demand for the simulator that can correctly mimic the real lithography process has been increased in recent years. In this study the thickness change of a 193 nm chemically amplified resist before and after post exposure bake was measured and the relationship JJetween the concentration of the deprotected sites and the thickness reduction was extracted. This resist thickness reduction effect was included in our modified simulator and more realistic resist profiles could be obtained. The simulation results showed enhancements in top rounding, sidewall angle, focus latitude and dose reduction.

생검펀치를 이용한 점액낭종의 절제

홍은혜,최병재,이제호,최형준,손흥규,김성오 대한소아치과학회 2007 大韓小兒齒科學會誌 Vol.34 No.2

점액낭종은 소타액선 분비관의 폐쇄나 파열로 타액이 저류되어 발생하는 연조직 부종이고, 비교적 높은 빈도로 발생하는 구강내 가성 낭종으로 스스로 파열되어 치유되기도 하지만 대개는 만성적으로 진행되어 몇 주에서 몇 달간 지속되기 때문에 치료가 필요하다. 점액 낭종의 발생시, 주변에 이환된 소타액선을 포함하여 제거하는 완전절제술 외에 재발율을 낮추기 위한 스테로이드의 국소적 주입, 냉동동결요법(cryotherapy), 미세조대술(micromarsupialization) 등의 여러 가지 치료방법이 제시되고 있다. 완전절제술의 한 방법으로 생검펀치(biopsy punch)를 이용할 수 있는데, 조작이 간편하고 출혈이 적으며 술 후 처치가 거의 필요없다는 장점이 있다. 이 증례는 점액낭종이 있고 행동 조절이 힘든 소아에서 생검펀치를 사용하여 점액낭종을 완전히 제거한 경우로, 양호한 결과를 얻었다. Mucocele is a clinical term of the localized superficial mucosal swelling caused by salivary retention after the obstruction or the rupture of minor salivary ducts. Various treatment methods have been suggested to lower its recurrence rate, including complete excision of lesion Biopsy punch can be used easily and simply for complete excision of mucocele. It has several advantages, such as convenience in use, low bleeding tendency, and nearly no requirements for post-operative management. In this case, biopsy punch was used for the removal of mucocele in an uncooperative child, which enable fast, simple and safe procedure, with a good result.