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농식품 환경 분야(PF) : PF-15 ; GC/ECD를 이용한 소고기, 닭고기, 우유 중 델타메쓰린 잔류 분석
정다이 ( Da I Jung ),최정희 ( Jeong Heui Choi ),김성우 ( Sung Woo Kim ),임소정 ( So Jeong Im ),이영준 ( Young Jun Lee ),무스픽 ( Musfiqur Rahman ),압두 ( Abd El Aty ),심재한 ( Jae Han Shim ) 한국환경농학회 2014 한국환경농학회 학술대회집 Vol.2014 No.-
In this study, a method was developed to determine deltamethrin residues in beef, chicken, and milk using gas chromatography equipped with electron capture detector. Samples were extracted with acetonitrile and MgSO4 and purified with SPE Florisil cartridge. Performance characteristics, including linearity, quantitation limit (LOQ), precision, and recovery were validated. A matrix-matched calibration was used for quantitation and recoveries obtained at 3 spiking levels; 15, 30, and 60 ㎍/kg, were satisfactory (74.8∼97.9 %). Precision and repeatability presented as relative standard deviation (RSDs) were < 8%. The limits of quantitation (LOQ) were estimated to be 10 ㎍/kg. The developed method was found to be able to determine the analyte with satisfactory intensity and accuracy in incurred samples.
05 포스터 발표 : 환경 화학 분야(PC) ; PC-03 ; LC/MS/MS를 이용한 현미와 볏짚 중 orthosulfamuron 잔류물 분석
이영준 ( Young Jun Lee ),최정희 ( Jeong Heui Choi ),김성우 ( Sung Woo Kim ),정다이 ( Da I Jung ),임소정 ( So Jeong Im ),무스픽 ( Musfiqur Rahman ),압두 ( Abd El Aty ),심재한 ( Jae Han Shim ) 한국환경농학회 2014 한국환경농학회 학술대회집 Vol.2014 No.-
Rice is one of the most consumed grain in the world because of its nutritional value. Orthosulfamuron, a selective and systemic herbicide, was used to control the post-emergence of annual and perennial broad leaves weeds, sedges, and barnyard grass in rice field. In this study, a modified QuEChERS method was used to extract orthosulfamuron residues from brown rice followed by tandem mass spectrometry. analysis in positive ion electrospray ionisation(ESI+). A determination coefficient ( R2) of > 0.994 was computed from matrix-matched calibration ranges of 0.01 to 2.0 mg/kg. Recoveries at two fortification levels (0.1 and 0.5 mg/kg) were acceptable (88.1 - 100.6%) with relative standard deviations (RSDs)<8%. The limit of quantitation (LOQ), 0.03 mg/kg, was comparatively low compared to the maximum residue limit (MRL = 0.05 mg/kg) set by the Ministry of Food and Drug Safety in the Republic of Korea. The method was successfully applied to field samples and none of the samples contain a residue higher than the limit of detection.
USABILITY ANALYSIS OF ELECTRIC BICYCLE
Kim Do Kyung,Ha Hye Young,Lee Da El,Marian,Han Hwee Young,Adusei,Kim Kwan Myung 대한인간공학회 2013 대한인간공학회 학술대회논문집 Vol.2013 No.5
Objective: the main purpose of this study is to propose solutions for revitalization of riding an electric bicycle by studying the usability and limitations of electric bicycle Background: Many countries are trying to pursue zero energy in attempt to reduce pollution. Electric bicycle that can be a solution has lots of problems when it comes to customer’s satisfaction. Method: An experiment was conducted with the bike made by Peninsula. Firstly, an experience analysis was conducted which was recorded in a user diary. At the same time, structure analysis performed. From these methods design solution directions were proposed. Results: It was found that the intuitiveness of the electric bike was low and the possibility of causing accident was high. Conclusion: The results of our research can be used in the redesigning of a new bike that enhances ergonomically the user’s satisfaction and also improves electric bike riding experience Application: Our findings can be applicable in many cities especially islands like Jeju that are pursuing strongly Zero and renewable energy.
HONG, SANG-WON,JUNG, KYUNG HEE,CHOI, MYUNG-JOO,KIM, DA YOUNG,LEE, HEE-SEUNG,ZHENG, HONG-MEI,LI, GUANG YONG,EL-DEEB, IBRAHIM M.,PARK, BYUNG SUN,LEE, SO HA,HONG, SOON-SUN Spandidos Publications 2012 International journal of oncology Vol.41 No.5
<P>The anticancer effect of a new pyrazole derivative, KI-10F (2-(4-(2-(4-(dimethylamino) phenyl)pyridin-4-yl)-5-(3-methoxy-5-methylphenyl)-1H-pyrazol?1-yl) acetonitrile)?3.5HCl) was evaluated in human colon cancer cells. KI-10F strongly suppressed the growth of human colon cancer cells and induced apoptosis by increasing the proportion of sub-G1 presenting apoptotic cells as well as causing cell cycle arrest at the G2/M phase. Apoptosis by KI-10F was confirmed by observation of an increase in the expression of cleaved caspase-3, caspase-8, caspase-9 and Bax, and the decrease of Bcl-2. Decreased expression of HIF-1α and VEGF, and the inhibition of HUVEC tube formation and migration showed that KI-10F effectively inhibited the angiogenesis process. Furthermore, in?vivo study in a mouse xenograft model showed that KI-10F produced a stronger antitumor activity than 5-FU, a conventional anticancer drug prescribed for the treatment of colon cancer. The effects of KI-10F on tumor proliferation (PCNA), angiogenesis (CD34) and apoptosis (cleaved caspase-3) were evaluated by immunohistochemistry using isolated tumor tissue samples. Taken together, our results demonstrated that KI-10F induces apoptosis and inhibits cell growth and angiogenesis both in?vitro and in?vivo. We suggest that KI-10F is an effective chemotherapeutic candidate for use against colon cancer.</P>
김성우 ( Sung Woo Kim ),최정희 ( Jeong Heui Choi ),정다이 ( Da I Jung ),임소정 ( So Jeong Im ),이영준 ( Young Jun Lee ),무스픽 ( Musfiqur Rahman ),압두 ( Abd El Aty ),심재한 ( Jae Han Shim ) 한국환경농학회 2014 한국환경농학회 학술대회집 Vol.2014 No.-
Evaluation of the residual behavior of pesticides in agricultural products before and after the household processing effects is pivotal to protect consumers from negative health effects caused by residues. In this study, The effects of various household processing effects, including washing, boiling, frying, and blanching on the residual pattern of diethofencarb in crown daisy and procymidone in leeks were investigated. For diethofecarb, the original QuEChERS with slight modifications was used for extraction followed by liquid chromatography-tandem mass spectrometry (LC/MS/MS) analysis; whereas, procymidone was extracted with acetone, purified with silica- solid phase cartridges, and analyzed using GC-ECD analysis. Recoveries at 3 different fortification levels were ranged between 73.7 - 100.0% with relative standard deviations (RSDs) <16%. The developed method was sensitive to estimate the residue levels below the maximum residue limits (MRLs) set by the Ministry of Food and Drug Safety.
04 포스터 발표 : 환경 화학 분야(PC) ; PC-15 : GC-μECD를 이용한 상추중 Metrafenone과 Boscalid분석을 위한 QuEChERS방법 비교
임소정 ( So Jeong Im ),무스픽 ( Md. Musfiqur Rahman ),김성우 ( Sung Woo Kim ),압두 ( A. M. Abd El-aty ),최정희 ( Jeong Heui Choi ),카빌 ( Md. Humayun Kabir ),팔하 ( Waziha Farha ),정다이 ( Da I Jung ),이영준 ( Young Jun Lee 한국환경농학회 2015 한국환경농학회 학술대회집 Vol.2015 No.-
Three versions of the QuEChERS method (quick,easy, cheap, effective, rugged and safe) . the original (unbuffered), modified acetate-buffered, and citrate-buffered versions were compared for thedetermination of metrafenone and boscalid residues in lettuce via gas chromatography-micro electron capture detector (GC-μECD). Onlymodified acetate-buffered version provided acceptable and more consistent recoveries for both of the target analytes than the other versions. Matrix matched calibration curves prepared for the analytes provided good linearity over the calibration ranges with the co-efficient of determination (r2) ≥ 0.998. Limit of detection (LOD) and quantification (LOQ) were 0.003 and 0.01 mg/kg for both of the analytes. Method was validated in triplicate at two fortification level and recovery of modified acetate buffered version was ranges between 77.0 and 88.1% with relative standard deviation (RSD) < 5 for the quantified analytes. The developed method was applied to the field incurred lettuce sample where half-life of metrafenone and boscalid were found 2.6 and 2.9 days respectively for double doses and 3.4 and 3.6 days respectively for triple doses.
05 포스터 발표 : 환경 화학 분야(PC) ; LC-MS/MS를 이용한 현미와 볏짚에서의 Benzobicyclon과 대사체 잔류 분석
임소정 ( So Jeong Im ),최정희 ( Jeong Heui Choi ),김성우 ( Sung Woo Kim ),정다이 ( Da I Jung ),이영준 ( Young Jun Lee ),무스픽 ( Musfiqur Rahman ),압두 ( Abd El Aty ),심재한 ( Jae Han Shim ) 한국환경농학회 2014 한국환경농학회 학술대회집 Vol.2014 No.-
This study was carried out to develop an extraction as well as an analytical method for detecting benzobicyclon and its amino-substituted metabolite (1315P-570) in brown rice and rice straw using liquid chromatography-tandem mass spectrometry (LC/MS/MS) in positive ionmode with multiple reaction monitoring (MRM). The parent as well as the metabolite in rice and rice straw were extracted and analyzed under the same conditions. The matrix-matched calibrations showed good linearity with determination coefficients ( R2) of > 0.994. Recoveries at two different spiking levels were satisfactory and ranged between 75.4.118.9% with relative standard deviations (RSDs) < 13% for both analytes. Under storage conditions (.20℃), the analyte and its metabolite were stable for up to 92 days. The limits of quantitation (LOQs) were lower than the maximum residue level (MRL) set by the Ministry of Food and Drug Safety for brown rice (0.1 mg/kg). Field trials with recommended or double the recommended dose revealed that the herbicide could safely be applied to rice and rice straw, as no residues were detected in the harvested samples. The sensitivity of the developed method was sufficient to ensure reliable determination of benzobicyclon and its metabolite in rice grain and rice straw.
04 포스터 발표 : 환경 화학 분야(PC) ; PC-14 : LC-MS/MS를 이용한 돼지, 닭고기, 계란중 Phorate와 대사체의 분석법 개발
무스픽 ( Md. Musfiqur Rahman ),김성우 ( Sung Woo Kim ),최정희 ( Jeong Heui Choi ),이영준 ( Young Jun Lee ),압두 ( A. M. Abd El-aty ),팔하 ( Waziha Farha ),정다이 ( Da I Jung ),카빌 ( Md. Humayun Kabir ),임소정 ( So Jeong Im 한국환경농학회 2015 한국환경농학회 학술대회집 Vol.2015 No.-
An analytical method was validated for phorate and its five metabolites (phoratesulfone, phoratesulfoxide, phorateoxon, phorateoxonsulfone, and phorateoxonsulfoxide) in pork, chicken, and egg using LC-MS/MS. The method was validated following MFDS (ministry of food and drug safety, Republic of Korea) official method developed for beef and milk. Extraction was carried out following QuEChERS using acidified acetonitrile and salt and purification was conducted via dSPE using primary secondary amine (PSA) and C18 sorbent. Calibration curve in matrix was linear with determination coefficient (r2) ≥ 0.995 for all of the analyte in three target matrices. Limit of detection (LOD) and quantification (LOQ) were 0.001 and 0.004 mg/kg for all of the matrices. Recovery was performed at three fortification level resulted acceptable values ranging from 74.22 and 119.89% with relative standard deviation (RSD)<6%. The developed method can be applied for routine analysis of phorate and its metabolites in different animal origin.