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Distribution of phthalate esters in air, water, sediments, and fish in the Asan Lake of Korea
Lee, Young-Min,Lee, Jung-Eun,Choe, Wooseok,Kim, Taeyeon,Lee, Ji-Young,Kho, Younglim,Choi, Kyungho,Zoh, Kyung-Duk Elsevier 2019 Environment international Vol.126 No.-
<P><B>Abstract</B></P> <P>Phthalate esters (PEs) are the most commonly used plasticizers and one of the endocrine disrupting chemicals (EDCs) which are extensively present in various environment. Therefore, it is important to examine the levels and distribution of phthalates in multimedia environment. This study investigated the seasonal and spatial variation of 14 PEs in air, water, sediments, and fish in the Asan Lake. Asan Lake is one of the largest artificial lakes in Korea, and is surrounded by industrial complex and farmlands. The PEs were found to be present throughout the study area. The mean concentration of total PEs (∑<SUB>14</SUB> PEs) was 3.92–33.09 ng/m<SUP>3</SUP> in air, not detected (n.d.)-2.29 μg/L in water, 3.6–8973 μg/kg dry weight (dw) in sediment, and n.d.-1081 μg/kg dw in fish, respectively. The most frequently detected phthalate in the samples was di(2-ethylhexyl) phthalate (DEHP), and followed by di-n-butyl phthalate (DBP). The concentrations of PEs in water and sediment samples tended to decrease moving downstream of Asan Lake. Bioaccumulation of PEs showed that benthic feeding fish such as crucian carp or skygager contained higher levels of DEHP. Partitioning of DEHP and DBP between water and sediment was calculated using paired sediment/water samples and fugacity fraction (<I>ff</I>). High <I>ff</I> value (<I>ff</I> = 0.89 ± 0.1) of DBP and low <I>ff</I> value of DEHP (<I>ff</I> = 0.24 ± 0.1) confirmed that DEHP is the most abundant PEs in the sediment, and DBP is the second most abundant PEs except DEHP in water. Our results can provide important information of the distribution and behavior of PEs in the lake environment.</P> <P><B>Highlights</B></P> <P> <UL> <LI> 14 phthalates were measured in air, water, sediment, and fish in Asan lake areas. </LI> <LI> Among phthalates, 2. DEHP and DBP were most frequently detected in all media. </LI> <LI> Phthalate levels in water and sediment increased moving downstream of the lake. </LI> <LI> Benthic feeding fish such as crucian carp or skygazer contained high level of DEHP. </LI> <LI> Sediment was a sink of DEHP and the potential secondary source of DBP in the lake. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
( Taeyeon Kim ),( Dongheon Lee ),( Jong Yun Hwang ),( Sunghun Na ),( Tae Gyu Ahn ),( Hyang Ah Lee ) 대한산부인과학회 2018 대한산부인과학회 학술대회 Vol.104 No.-
Ovarian torsion in children is an uncommon cause of acute abdominal pain, but mandates early surgical management to prevent further adnexal damage. Its clinical presentation mimics other pathologies, such as acute gastroenteritis (AGE), acute appendicitis, so getting a correct diagnosis is quite difficult. This report described a huge ovarian cyst torsion with delayed diagnosis. A 11 year-old pre-menarchal girl presented to the Emergency Department with 1 day of abdominal pain, nausea, and vomiting. She reported similar episodes over the previous 6 months. She visited pediatricians twice for abdominal pain episodes, and they considered her problem as the AGE every visit. Finally she visited us and we performed transabdominal ultrasound of the pelvis and it revealed her left ovarian mass measured 9.5 7.0 cm with heterogenous echogenic pattern. She immediately underwent a contrast-enhanced computed tomography (CT) scan of the abdomen and pelvis, which revealed a large ovarian hemorrhagic cyst measured 80x100 mm and was predominantly occupying the whole mid and lower abdomen. Tumor markers such as CA125, CEA, -FP, HCG were within normal range. Based on these findings, we suspected the ovarian tumor and emergency surgery was performed. On laparoscopy, the right ovary and fallopian tube was shown as twisted 2 times 720 counterclockwise, and swollen with necrosis. If the correct diagnosis was gotten on time, her jeopardized ovary might be saved. However, ovarian torsion is easy to be neglected as a cause of abdominal pain in children. So, We should keep in mind that the ovarian torsion is an emergency disease and could occur even in children.
Placenta percreta causing rupture of an unscarred uterus at the first trimester of pregnancy
( Taeyeon Kim ),( Tae Gyu Ahn ),( Sunghun Na ),( Hyang Ah Lee ),( Jongyun Hwang ),( Dong Heon Lee ) 대한산부인과학회 2018 대한산부인과학회 학술대회 Vol.104 No.-
Placenta percreta detected in the first trimester is a very rare condition. It is a known obstetric condition leading to serious maternal morbidity and mortality. High index of clinical suspicion and anticipation of placenta percreta is highly essential in early pregnancy as it is difficult to diagnose. We report a case of placenta percreta-induced spontaneous uterine rupture at the 9th week of pregnancy in a primigravida woman.A 38-year-old pregnant woman was transferred to our hospital at 9+3 weeks of gestation complaining of abdominal pain. She was diagnosed with hemoperitoneum based on ultrasonography. As an emergency diagnostic laparoscopy was performed, a significant hemoperitoneum with active bleeding was confirmed to be caused by rupture between the right lower segment and borderline of the cervix in the anterior wall. Since difficulty of approach to uterine rupture site, conversion to laparotomy was done. Hemostasis with compression and primary repair was successfully performed to sustain the pregnancy, and the patient was discharged in 7days following surgery and she was delivered by cesarean section at 38 gestational week.
Nephrotoxicity due to Acyclovir in Chickenpox (Varicella) with pregnant woman
( Taeyeon Kim ),( Songyi Kook ),( Taegyu Ahn ),( Jongyun Hwang ),( Hyangah Lee ),( Dongheon Lee ),( Sunghun Na ) 대한산부인과학회 2018 대한산부인과학회 학술대회 Vol.104 No.-
Acyclovir is often used to treat herpesvirus infections, but can induce acute renal failure. Secondary acute renal failure associated with acyclovir is characterized by a rapid increase in serum creatinine (SCr) within 12-48 h after drug administration. Immediate detection of acute renal failure is important to prevent morbidity. We recently encountered a case of acyclovir-induced nephrotoxicity during chickenpox (varicella) infection in a pregnant woman. This is the first report detailing the diagnosis and successful treatment of acute kidney injury secondary to intravenous acyclovir in a pregnant woman during the second trimester.
CAN을 위한 네트워크 노드의 프로그램 알고리즘 구조에 대한 연구
이태연(Taeyeon Lee),박재홍(Jaehong Park),김형욱(Hyunguk Kim),김의봉(Euibong Kim) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, the structure of an algorithm of a network node for a CAN (Controller Area Network)-based wiring system is studied. The algorithms with polling or interrupt driven handling are compared. A common structure of algorithm for the network nodes software is proposed. A CAN-based wiring system for a Hyundai motor company's passenger car XG has been developed using the proposed method. The experimental results show the feasibility of the implementation of the method.