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Da-Young Kim,Da-In Kim,Yeung-Jin Seo,Soon-Kun Choi,Kwon-Rae Kim,Kye-Hoon Kim,Oh-Kyung Kwon,Won-Il Kim 한국토양비료학회 2019 한국토양비료학회지 Vol.52 No.4
This study was conducted to identify transition characteristics of heavy metal(loid)s and to assess dietary risk in the Angelica gigas and Cnidium officinale grown at the major medicinal plant producing districts in Korea. Average bio-concentration factor (BCF) values and range were 0.056 (0.006-0.511) in arsenic (As), 2.030 (0.021-15.678) in cadmium (Cd), 0.179 (0.052-0.393) in mercury (Hg), and 0.061 (0.013-0.474) in lead (Pb) in Angelica gigas. Average BCF values and range were 0.044 (0.011-0.264) in As, 0.557 (0.052-4.255) in Cd, 0.174 (0.069-0.286) in Hg, and 0.024 (0.012-0.057) in Pb in Cnidium officinale. The BCF values by heavy metal(loid)s in Angelica gigas and Cnidium officinale were high in Cd, copper (Cu) and zinc (Zn), while As and Pb were found to be less transferable. The BCF values calculated in this study will be useful for predicting the uptake of heavy metal(loid)s. Human exposure to As, Cd, Hg, and Pb through dietary intake of Angelica gigas and Cnidium officinale might not cause adverse health effects although some Angelica gigas were higher than the allowable value for Cd. Further study on uptake and accumulation mechanism of Cd by Angelica gigas is required to assess the human health risk associated with soil contamination.
신동맥에 접한 복부대동맥류에서 굴뚝형 이식편을 이용한 혈관내 치료
김다래 ( Da Rae Kim ),고영국 ( Young Guk Ko ),이도연 ( Do Yun Lee ),최동훈 ( Dong Hoon Choi ) 대한내과학회 2014 대한내과학회지 Vol.86 No.2
An endovascular repair of an abdominal aortic aneurysm (AAA) is technically less invasive than open surgery, but gives results as effective as open surgery if the anatomy is adequate. Unfortunately, 20-30% of AAA patients are not suitable for endovascular repair because they lack a sufficient proximal landing zone. In an effort to broaden the applicability of endovascular repair, the chimney technique has been introduced. This refers to deployment of a covered or bare-metal stent parallel to the main aortic endograft within the aneurysm, creating a conduit that runs outside the main aortic endograft into the aortic branches. We report the case of a 75-year-old male with a juxtarenal abdominal aortic aneurysm and multiple comorbidities who was treated successfully with an endovascular aneurysm repair using a chimney graft. (Korean J Med 2014;86:213-217)
LC-MS/MS를 이용한 엇갈이배추 중 Fluxapyroxad와 대사물 M700F002, M700F048의 분석법 연구
전다래 ( Da Rae Jeon ),최종우 ( Jong-woo Choi ),김정한 ( Jeong-han Kim ) 한국환경농학회 2019 한국환경농학회 학술대회집 Vol.2019 No.-
Fluxapyroxad는 carboxamide계 살충제로 참외, 가지, 참깨 등의 흰가루병, 잎마름병, 잿빛무늬병 등 광범위한 농작물에 이용되고 있으나 엇갈이배추에는 그 분석법이 미흡한 실정이다. 본 연구에서는 농약품목등록 자료에 활용 하고자 fluxapyroxad와 대사물 M700F002 및 M700F048의 엇갈이배추 중 잔류 분석법을 검토해 보았다. LC-MS/MS (Shimadzu LCMS-8040)에 표준물질을 주입하여 scheduled MRM (multiple reaction monitoring)조건을 설정하였으며 fluxapyroxad는 Kinetex C18 (2.1 × 100 mm, 5μm, Phenomenex)컬럼을, 대사물(M700F002, M700F048)은 Hypercarb (2.1 × 100 mm, 5μm, Thermo)컬럼을 이용하여 기기조건을 제시하였다. 시료전처리를 위하여 시료 10 g에 0.2 % formic acid가 첨가된 acetonitrile 10 mL를 넣고 1분간 격렬히 진탕한 후 4 gMgSO<sub>4</sub>, 1 g NaCl을 첨가하여 다시 1분간 진탕하였다. 3500 rpm에서 5분 동안 원심분리 후 상층액 1 mL를 취해 dispersive-SPE (MgSO<sub>4</sub> 150 mg, C18 25 mg)에 첨가하여 1분간 진탕한 다음 13,000 rpm에서 4분 동안 원심분리 하였다. 상등액 200 μL와 acetonitrile 200 μL를 혼합하여 matrix matched 시료를 제조하여 LC-MS/MS로 분석하였다. 위 분석법에 따른 Fluxapyroxad와 대사물의 분석정량한계(method limit of quantitation; MLOQ)는 각각 25ng/mL (fluxapyroxad), 50 ng/mL (M700F002, M700F048)이었다. Matrix matched 방법을 이용한 검정곡선의 범위는 fluxapyroxad에서 5 ~ 200 ng/mL, 대사물은 10 ~ 200 ng/mL이었으며, 검정곡선의 상관계수(r2)는 모두 0.99 이상을 만족하였다. 분석법의 검증을 위하여 무처리 시료에 fluxapyroxad와 대사물 M700F002와 M700F048를 MLOQ의 10배, 20배로 처리하여 회수율 시험을 진행 한 결과 모두 회수율범위 70 ~ 120 % (RSD < 10 %)를 만족하였다. 따라서 본 연구에서 제시한 분석법을 통하여 엇갈이배추에 대한 fluxapyroxad 및 대사물 M700F002와 M700F048의 잔류 모니터링에 활용이 충분하다고 본다.
Hae-Ryun Choi,Kukhyeon Kim,Hyung-Rae Kim,Sang-Yeoup Kim,Tae-Hee Yoo,Hyun-Kyung Yoon,Da-Som Kim,Bong-Kyu Byun 한국응용곤충학회 2016 한국응용곤충학회 학술대회논문집 Vol.2016 No.10
This study was carried out to clarify the taxonomic status position between two species, Archips audax and A. asiaticus of the family Tortricidae, which have been confused due in their very similar character in appearance. For the reason, A. asiaticus has been treated as junior of A. audax in Korea until now (Park and Byun, 1989). Also, it has been known as synonym of A. audax too in Japan (Suzuki and Komai, 1984). However, in China A. asiaticus has been listed as a valid species (Park et al,. 2014). The aim of this study is to clarify the taxonomic differences between the two species with DNA barcoding. We conducted the tree with the result of DNA barcoding by using MAGA 6. A. audax and A. asiaticus build in different clade and distance was 0.02. In this study, we extracted COI gene for DNA barcode and analyzed the sequences using MEGA 6. Also, genitalic dissection and observation of morphology were conducted. As the result, we have to treated A. asiaticus is valid species.
최민지(MinJi Choi),박지영(Ji-Young Park),임미영(Mi-Young Lim),정다영(Da-Young Jung),류현수(Hyeon-Su Ryu),김순신(),오나래(Na-Rae Oh),양원호(Wonho Yang) 한국환경보건학회 2017 한국환경보건학회지 Vol.43 No.5
Objectives: The purpose of this study was to investigate the factors affecting the use of oral hygiene products in infants. Methods: From October 2015 to December 2015, astructured questionnaire survey was conducted for infants and parents about the infants’ oral hygiene product use from 0 to 4 years of age in Seoul and other metropolitan areas. Results: The use of oral tissues for infants and children was more frequent in infants, with less than four uses of oral tissues per 10 infants. The overall amount of toothpaste usage among infants was lower than those of infants whose parents are high school or college graduates. The number of oral tissues used per infant per week was less among infants who sucked less than 4 times per 10 infants. The frequency of use of infant mouthwash per week in every 10 infants was less than those who swallow mouthwash less than once. The number of mouth rinses after the use of oral tissues for infants was high in boys, and the number of infants who sucked oral tissues was less than 4 times when used 10 times. The number of mouth rinses after the use of toothpaste was less for infants with college–graduate parents. The factors affecting the number of mouth rinsings after using oral tissues for infants were gender and sucking frequency. Conclusions: In this study, the oral hygiene products for infants were found to differ and affect the usage, the frequency of use, and the number of mouth rinses according to the general characteristics of infants and parents and the use of oral hygiene products.