http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
HRGC/HRMS를 이용한 PCNs 함유 페기물의 이성질체 분석
권준화(Junhwa Kwon),권은혜(Eunhye Kwon),김민선(Minsun Kim),조신영(Shinyoung Cho),이원석(Wonseok Lee) 환경독성보건학회 2021 한국독성학회 심포지움 및 학술발표회 Vol.2021 No.5
잔류성유기오염물질(Persistent Organic Pollutants, POPs)은 생물 농축성, 독성, 분해 저항성이 있는 화학물질 및 부산물이다. 생태계와 인간의 건강을 보호하기 위해 2001년 체결된 스톡홀름 협약을 통해 POPs의 생산, 사용, 배출의 단계적 저감 및 근절 방안을 마련해 오고 있다. 잔류성유기오염물질 중 Polychlorinated naphthalenes(PCNs)은 2015년 당사국총회에서 Hexachlorobutadiene(HBCD), Pentachlorophenol(PCP)와 함께 등재물질로 추가되었으며, 국내에서는 잔류성오염물질 관리법에 의해 관리되고 있다. PCNs는 1983년 생산이 중단되었으나, 과거에 생산, 제조된 제품이 폐기물로 배출될 가능성이 있어 배출원 및 배출량의 현황 파악과 관리가 필요하다. 본 연구에서는 표면 코팅제, 페인트, 섬유 및 절연 테이프 등 PCNs 함유 가능성이 높은 물질 10종을 선정하여 분석하였다. 선정된 물질은 EPA-1613을 준용하여 전처리 하였고, HRGC/HRMS를 이용하여 분석을 수행하였다. 연구결과, 10종 물질에 함유된 PCNs의 농도는 0.237 ~ 34.552 ng/g 으로 나타났으며, Mono-CN, Tetra-CN, Di-CN이 주로 검출되었다.
Polychlorinated naphthalenes (PCNs) in seafood: Estimation of dietary intake in Korean population
Kim, Jongchul,Shin, Eun-Su,Choi, Sung-Deuk,Zhu, Jiping,Chang, Yoon-Seok Elsevier 2018 Science of the Total Environment Vol.624 No.-
<P><B>Abstract</B></P> <P>Polychlorinated naphthalenes (PCNs) were measured in 33 seafood species including fish, mollusks and crustaceans purchased from local markets in five Korean cities between 2012 and 2013. Five samples were collected from each species for the measurements. Thirty-seven PCN congeners from tetra-CN to octa-CN were measured. Octa-CN (octachloronaphthalene) was not detected in any of the samples. Tetra-CN and penta-CN were the predominant homologues of PCNs in seafood samples with PCN 51 and PCN 52/60 being the most abundant congeners in the samples. Total PCNs concentrations and their corresponding dioxin-like toxic equivalent (TEQ) values ranged from non-detection (ND) to 110pg/g on a wet weight (ww) basis and from ND to 0.14pg-TEQ/g ww, respectively. The estimated daily intake of total PCNs based on an absolute content and TEQ potency were estimated for the Koreans to be 570pg/day and 0.44pg-TEQ/day, respectively. However, the estimated TEQ value of PCNs intake from seafood, represented only a small fraction (3.0%) of the total TEQ intake from consumption of seafood in Korean population. This is the first report to exhibit the presence of PCNs in seafood samples collected from local markets in Korea and their intake by general population.</P> <P><B>Highlights</B></P> <P> <UL> <LI> First report on PCNs in seafood samples purchased from local markets in Korea </LI> <LI> Calculation of toxic equivalency (TEQ) of PCNs in seafood samples </LI> <LI> Estimation of both daily intake of PCNs and TEQ values in Korean general population </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Lab-Scale 반응기를 이용한 PCNs 함유 폐기물의 소각처리 가능성 연구
권은혜 ( Eunhye Kwon ),배지수 ( Jisu Bea ),김우일 ( Wooil Kim ),윤영삼 ( Youngsam Yoon ),이원석 ( Wonseok Lee ),박호연 ( Hoyeun Park ) 한국폐기물자원순환학회 2021 한국폐기물자원순환학회지 Vol.38 No.4
Polychlorinated naphthalenes (PCNs), one of Persistent Organic Pollutants (POPs), and are colorless crystalline substances with similar structure and physical and chemical properties with PCB (polychlorinated biphenyl), and are produced by the chlorination of naphthalene. PCN is one of POPs are rarely degraded in the environment; consequently, they negatively impact the environment by threatening human health and the ecosystem. In this study, the potential of a stable treatment for lab-scale-incinerated waste containing PCNs was evaluated. For this study, waste containing PCNs were selected as the surface coating agent, mixed sample, and technical sample. The results revealed that when the PCNs concentration was 34.552 ~ 2,582.463 ng/g, the concentrations of Mono-CN and Tetra-CN were higher than those of other homologues. The incineration treatment conditions were derived by measuring three parts, after which the elemental composition was analyzed and the calorific value, theoretical air content, and residence time were calculated. Using the temperature of the target sample, thermogravimetric analysis revealed that the incineration treatment can be achieved at the incineration temperature of the existing incineration facility via weight change. Therefore, the incineration temperature was set between 850 and 1,100℃; however, the incineration temperature of the sample containing a high concentration of PCNs was set at 350, 500, 850, and 1,100℃. At 350 and 500℃, high concentrations of CO and NOx were observed, which could be attributed to incomplete combustion. Furthermore, heat-sensitive PCNs showed a de-chlorination reaction between 200 to 440℃. In addition, the decomposition rate (DRE) slightly increased according to the incineration temperature increase.
OH, EUN-JIN,PARK, JAE-HONG,CHO, MONG,LEE, WON-JAE,CHOI, YUNG HYUN,YOO, MI-AE 부산대학교 유전공학연구소 2002 분자생물학 연구보 Vol.18 No.-
Cdx1 and Cdx2 are known as Caudal-related homeodomain transcription factors important in the early differentiation and maintenance of intestinal epithelial cells. Cdx1 and Cdx2 are expressed in the small intestine and colon of fetus and adult. Most previous studies suggested that Cdx2 inhibits proliferation. Serveral target genes of Cdx2 have been identified. However, the effect of Cdx1 on cell proliferation is currently controversial and its target genes except for Hox-A7 remain unknown. In this study, we found several potential Caudal-related homeodomain binding sequences in the 5'-flanking region of human PCNA gene. Cotransfection experiments, using human PCNA reporter plasmid and CDX1 and CDX2 expression plasmids, showed that CDX1 transactivates human PCNA gene promoter activity in hepatocellular cell line (HepG2) and colorectal carcinoma cell lines (Colo320HSR and HCT116), while CDX2 does not. CDX1-induced PCNA expression was also detected in immunoblot and cytochemistry experiments. In BrdU incorporation experiments, CDX1 enhanced the incorporated BrdU. Taken together, our results suggest that CDX1 have a pro-proliferative effect on proliferation through transactivation of PCNA promoter activity.