건강한 한국인 성인의 혈청 갑상선호르몬 참고치

장윤영,김창윤,황태윤,김경동,이채훈,Jang, Yoon-Young,Kim, Chang-Yoon,Hwang, Tae-Yoon,Kim, Kyung-Dong,Lee, Chae-Hoon 대한예방의학회 2008 예방의학회지 Vol.41 No.2

Objectives : This study was conducted to determine the reference interval of serum thyroid hormones(TSH, $FT_3$, $FT_4$) in healthy Korean adults. Methods : Health examination data from 1,591 healthy Korean adults who visited an university hospital were analyzed. Patients with specific health conditions capable of altering laboratory results were excluded from the study. Serum thyroid hormones were measured using IMMULITE 2000 (DPC, USA, 2002). Subjects were 18-65 years old; 911 were male, and 690 were female. Results : The arithmetic means of TSH, $FT_3$, and $FT_4$ values for male subjects were $1.28{\pm}1.84\;{\mu}IU/ml$, $3.23{\pm}0.57\;pg/ml$, and $1.42{\pm}0.22\;ng/dl$, respectively. In female subjects, the arithmetic means of TSH, FT3, and FT4 values were $1.49{\pm}2.08\;{\mu}IU/ml$, $3.08{\pm}0.54\;pg/ml$, and $1.29{\pm}0.24\;ng/dl$, respectively. The arithmetic mean $FT_4$ value for males decreased with age (p<0.01). The arithmetic mean $FT_3$ value for females increased with age (p<0.01). The arithmetic mean thyroid hormone values of all study subjects differed significantly based on season. The arithmetic mean of male $FT_4$ decreased with increasing BMI (p<0.01). The arithmetic mean of female $FT_3$ increased with increasing BMI (p<0.01). The reference intervals recommended by the IMMULITE 2000 manufacturer are $0.40-4.00\;{\mu}IU/ml$ for TSH, 1.80-4.20 pg/ml for $FT_3$, and 0.80-1.90 ng/dl for $FT_4$ (same values for both genders). Conclusions : There was a significant difference in the interval of thyroid hormones between males and females, but the reference interval of IMMULITE 2000 was not established by gender. There is a need to reestablish the reference interval for thyroid hormones in Korean healthy adults.

Fe°/H2O2 시스템을 이용한 펜톤유사반응의 특성에 관한 기초 연구

장윤영(Yoon Young Chang),정동철(Dong Chul Chung),정민정(Min Jung Chung),최상일(Sang Il Choi) 한국물환경학회 1999 한국물환경학회지 Vol.15 No.4

Iron in Fenton`s oxidation can catalyze the decomposition of hydrogen peroxide and increase the oxidation of organics. Fenton-like oxidation of phenol was studied using hydrogen peroxide in combination with zero-valent iron substituted for ferrous iron in Fenton`s reaction. Batch tests were performed at room temperature and pressure in the absence of pH adjustment. The degradation of phenol in Fe°/H₂O₂ system was enhanced with the addition of iron powder, appearing to follow first-order reaction. And the rate constant (k`_p) of phenol degradation was remarkably increased from 0.0011 to 0.0097 min^(-1)(g/L)^(-1) by the acid treatment of the iron powder. The decomposition rate of hydrogen peroxide in the presence of iron powder also showed first-order reaction with increase of iron concentration, which shows iron powder to act as a catalyst for the activation of hydrogen peroxide and owing to this for the oxidation of phenol. This study indicates that the addition of zero-valent iron instead of ferrous iron in Fenton`s reaction is a feasable alternative in the treatment of wastewater containing refractory organic pollutants.

포스터발표 : 상수처리 ; 주물공정 제철부산물을 이용한 비소 제거특성에 관한 연구

장윤영 ( Yoon Young Chang ),김광섭 ( Kwang Sup Kim ),이재원 ( Jae Won Lee ),박준범 ( Jun Bum Park ) 대한상하수도학회 2004 공동추계 학술발표회 논문집 Vol.2004 No.-

소성 및 접촉건조 방식에 의해 제조된 망간코팅사의 물리화학적 특성 비교

장윤영(Yoon Young Chang),김병권(Byeong Kwon Kim),홍순철(Soon Chul Hong),서은옥(Eun Ok Seo),양재규(Jae Kyu Yang) 大韓環境工學會 2007 대한환경공학회지 Vol.29 No.11

본 연구에서는 접촉 및 건조 방법으로 만든 망간사의 물리화학적 특성을 기존의 소성처리 방법으로 만들어진 망간사의 그것과 비교하였다. 접촉 및 건조방법을 사용하여 망간사를 제조할 때에 모래 입경별 및 접촉시간을 제조변수로 하였으며 접촉 및 건조방법에 의한 망간사 제조시의 최적조건은 망간 코팅효율, 제조시간, As(III)에 대한 산화효율로부터 도출하였다. X-선 회절분석을 통하여 접촉 및 건조방법에 의해 제조된 망간사 표면의 산화망간에 대한 광물 분석결과를 JCPDS 자료와 비교한 결과 β-MnO₂와 γ-MnO₂의 혼합물인 것으로 판명되었다. 접촉 및 건조방법으로 제조한 망간사는 기존의 소성처리 방법으로 제조한 망간사에 비해 As(III) 산화효율은 유사하지만 코팅된 망간의 안정성이 보다 큰 것으로 나타났다. 접촉 및 건조방법은 코팅된 망간함량, 코팅된 망간의 안정도 그리고 As(III)에 대한 산화성능 등을 고려할 때 기존의 망간사 제조방법을 대체할 수 있는 우수한 제조공정으로 나타났다. Physicochemical characteristics of the manganese-coated sand(MCS) prepared by wetting and dry(W&D) method were compared with that by baking method, which is previously used. Particle sizes of the sand and wetting times were used as variables in the preparation of MCS and an optimum condition for the preparation MCS by W&D was determined from the coating efficiency, preparation time and oxidation efficiency of As(III). Comparing the X-ray diffraction spectroscopy(XRD) peak information of manganese oxide prepared by W&D method with the JCPDS file, the peaks were identified as the mixture of β-MnO₂ and γ-MnO₂. The MCS prepared by W&D method showed similar oxidizing powers to As(III) compared to that by baking method. However, the stability of the manganese on MCS prepared by W&D method was greater than that by baking method. From this work, wetting and dry was identified as an efficient preparation method in the view point of coated amount of manganese on sand, stability of coated manganese and oxidation efficiency of As(III).

매립지 침출수처리를 위한 펜톤유사반응에 관한 연구

장윤영(Yoon Young Chang),최상일(Sang Il Choi),이철효(Cheol Hyo Lee) 한국물환경학회 2000 한국물환경학회지 Vol.16 No.3

The treatment of landfill leachate with hydrogen peroxide catalyzed by iron metal which is different from Fenton reaction in that the form of iron used is not ferrous ion but zero valent iron was investigated using a jar tester. The leachate (COD 1100㎎/L, pH 8) in a process line between an aeration lagoon and a Fenton oxidation tank in Kimpo Landfill, Seoul was sampled for test The average size of the iron metal (99.9%, from Junsei Co.) used in this study was analyzed by scanning electron microscope (SEM) and showed 10-100㎛ in diameter. Iron enhances the decomposition of hydrogen peroxide with the reaction which proceeds in two steps: the oxidation of zero valent iron to ferrous iron followed by the oxidation of ferrous iron to ferric iron under reductive conditions. The effectiveness of the iron catalyst for the destruction of chemical oxygen demand (COD) of the landfill leachate was monitored, focused on the process variables of H₂O₂ and Fe° concentrations, and solution pH. The iron particles were pretreated before use by washing with 1 M HCl and then rinsing with distilled water and aceton followed by N₂ purging in a glass column. The oxidation reactions were almost complete within 30min and the more apparent change in H₂O₂ and COD consumption and pH was not observed. The most sensitive process variable on the COD oxidation reaction was solution pH and the oxidation of COD at low pH provided greater than 66% COD removal. The continuous treatment of landfill leachate in a glass column packed with Fe° and activated carbon shows that the Fenton-like oxidation can be an effective tool for either in situ or above-ground treatment of landfill leachate.

철 및 망간코팅사 충전비를 달리한 여과시스템에서 3가 비소 제거의 최적 조건

장윤영(Yoon Young Chang),김광섭(Kwang Seob Kim),송기훈(Ki Hoon Song),양재규(Jae Kyu Yang) 大韓環境工學會 2006 대한환경공학회지 Vol.28 No.11

철코팅 모래흡착제 제조 및 비소흡착

장윤영(Yoon Young Chang),김광섭(Kwang Sub Kim),정재현(Jae Hyun Jung),이승목(Seung Mok Lee),양재규(Jae Kyu Yang),박준규(Joon Kyu Park) 大韓環境工學會 2005 대한환경공학회지 Vol.27 No.7

나노크기 미세철입자를 이용한 질산오염수의 고속탈질처리

장윤영(Yoon Young Chang),최승희(Seung Hee Choe),신정엽(Jung Yup Shin),황경엽(Kyung Yub Hwang) 한국물환경학회 1998 한국물환경학회지 Vol.14 No.4

In recent years considerable efforts for the removal of nitrate have been made in the development of nitrate removal techniques. One of the conventional treatment methods of nitrate is biological denitrification. However, this process needs other carbon sources for microbial activities and a long period of time to reduce the nitrate level in polluted water. In this study nitrate reduction using synthesized zero-valent iron powder(Fe˚) with nanoscale was proposed in situ or above-ground treatment of nitrate-polluted water at room temperatures and pressures. Nanoscale iron removed 50, 100, 200, and 400㎎/l of nitrate within 30min with little intermediates. Compared with commercial iron powders(15∼75㎛), the synthesized iron powder(1∼100㎚) showed high removal efficiencies(10∼100times) in a short time period with low metal to solution ratio(4∼10g/100㎖). The approach presented offers unique opportunities for both fundamental research and technological applications of zero-valent metals to nitrate-polluted water. For example, iron can be used to construct a reactive barrier in the path of a contaminated groundwater plume to remove NO_(3-).

멸종위기 야생식물 이미지를 활용한 지속가능한 텍스타일 패턴 개발 연구

장윤영 ( Chang¸ Yoon Young ),박현주 ( Park¸ Hyun Joo ) 한국기초조형학회 2020 기초조형학연구 Vol.21 No.6

본 연구의 목적은 사회적으로 지속해서 논의되는 한국의 멸종위기 야생식물 이미지를 활용한 지속가능한 텍스타일 패턴 개발을 진행하는 것으로, 21세기 화두이자 키워드인 지속가능성과 환경문제 안에서 연구해 볼 수 있는 텍스타일 디자인 개발을 고찰하고 시도해보고자 하였다. 한국에 자생하는 멸종 위기에 처한 식물들이 267여 종에 달하고 있기에, 연구를 통해 자생식물의 중요성 인지와 함께 보존의 필요성을 알리고자 하였다. 이를 위해 멸종위기 식물 이미지를 이용해 모티브로 개발하고 다양한 제품에 적용될 수 있도록 텍스타일 패턴으로 개발하여 시사점을 제공하였다. 연구 방법으로는 지속가능한 텍스타일 디자인의 개념과 멸종위기종의 고찰을 통해 환경부에서 지정한 국내의 멸종위기 야생 생물과 멸종위기 야생식물의 개념과 지정 현황을 살펴보았다. 텍스타일에 적용된 디자인을 바탕으로 멸종위기종 이미지를 이용한 국내 브랜드의 다양한 디자인 사례를 조사하고, 사례에 대한 분석도 진행하였다. 또한, 조사된 이론적 배경과 선행 연구를 기반으로 멸종위기 식물 I · II급 총 88종을 45개의 과로 분류한 뒤, 그중 가장 많은 식물이 속해있는 난초과, 미나리아재비과, 붓꽃과 그리고 백합과를 중심으로 각 과 두 종류씩 모티브 개발로 전개할 식물 8종을 선정하였다. 이 분류를 기반으로 핸드 드로잉을 통해 텍스타일 디자인을 제작하였다. 결과적으로 총 16개의 패턴디자인으로 제작하여 디지털 텍스타일 프린팅, 전사 날염 등 각각의 섬유 소재에 맞는 프린팅 공정을 통해 실생활에서 활용되는 텍스타일 프로덕트로 개발하였다. 텍스타일 디자인은 그 목적에 맞는 활용성 면에서 모티브가 차지하는 비중과 쓰임이 크다. 그렇기에 멸종위기종을 모티브로 개발한 텍스타일 디자인은 디자이너의 사회적 책임감과 함께 환경적 보존가치가 포함되어 생물 다양성 보전 및 환경 보호 증진에 도움이 될 가능성이 높을 것으로 본다. Environmental issues are currently topical in our society, and there is an ongoing debate regarding the issue of sustainability and endangered species. Habitats of flora native to Korea are damaged by indiscriminate development and threatened for a variety of reasons, resulting in 267 endangered plant species. As the endangered plant species are at the risk of extinction without conservation measures, they need to be protected and the awareness of the species needs to be raised. The present study was conducted to develop sustainable textile patterns with images of endangered plants to increase awareness of social values. To fulfill these objectives, first, a theoretical review of sustainable textile design and endangered flora was conducted. Second, the study included an examination of brand design case studies that utilized images of endangered species using a marketing approach to determine the value and content of the designs. The results of prior research suggested that designs are often used as part of campaigns and for the marketing of specific causes. Third, 88 species of Class I and II endangered plants were classified into 45 families, and the most common four families were selected, namely, Orchidaceae, Ranunculaceae, Iridaceae, and Liliaceae. Textile patterns were designed for two species in each family. Fourth, the finished designs were printed using materials suitable for the designs and made into textile products that are commonly used in everyday life, such as bags. The Textile pattern designs that incorporated images of endangered flora were developed in the current study. As a motif is important in textile patterns, designs with endangered flora as a motif are likely to be meaningful and value-laden, thus helping the conservation of biodiversity and promoting environmental protection.

제강분진의 산화촉매반응을 이용한 염색폐수 처리

장윤영(Yoon Young Chang),배범한(Bum Han Bae),지원현(Won Hyun Ji),장윤석(Yoon Seok Chang),강정우(Jung Woo Kang) 한국물환경학회 2001 한국물환경학회지 Vol.17 No.5

This study attempts to elucidate the possibility of treating dyeing wastewater by steelers` dust/H₂O₂ system in a well-mixed batch reactor. Experiments were conducted to investigate the effects of operating variables such as pH, dust and H₂O₂ dosages and H₂O₂ injection method on the treatment efficiency. Contaminant concentrations were identified by TOC(Total Organic Carbon) analyzer. Experimental observations showed the possibility of steelers` dust as a catalytic reagent in the H₂O₂/dust system. The batch experiments showed that the optimal H₂O₂ and dust dosage, 20g/L dust + 1,500㎎/L H₂O₂ removed about 85% of initial TOC concentration(100㎎/L) within 30 min. And the TOC removal in the H₂O₂/dust system effectively proceeded only within a limited pH range of 3-4. The steelers` dust-catalyzed oxidative treatment of dyeing wastewater was more efficient compared with the FeSO₄-catalyzed system(Fenton oxidation) for the removal rate and the cost.