재활용 탄소섬유를 이용한 자동차용 시트 프레임 제조에 관한 연구

기웅(Woong Ki),송현도(Hyun-do Song),신헌충(Hun-chung Shin),신현규(Hyun-kyu Shin),강신재(Shin-jae Kang) 한국자동차공학회 2016 한국자동차공학회 부문종합 학술대회 Vol.2016 No.5

대만 수출용 배추 및 양배추에서 해충 및 잔류농약 실태조사

기웅 ( Woong Ki ),홍기정 ( Ki-jeong Hong ) 강원대학교 농업생명과학연구원 2021 강원 농업생명환경연구 Vol.33 No.3

2015년부터 2019년까지 한국산 엽채류 수출에서 배추(B. rapa subsp. pekinensis)는 7개국으로 대만에 88-97%를, 양배추(B. oleracea var. capitata)는 9개국으로 대만에 83-99%를 수출하고 있어 2018년을 제외하고는 대만으로의 수출 비중이 매우 높게 나타나고 있으며, 대만 측에서는 식물검역증명서(PC) 상의 부기사항으로 배추와 양배추의 경우 꽃노랑총채벌레(F. occidentalis)와 마늘줄기선충(D. dipsaci)에 대하여 무감염 증명을 요구하고 있다. 또한 농촌진흥청 국립농업과학원에 따르면, 배추와 양배추의 대만 수출과정에서 잔류농약허용기준 초과로 살균제는 diniconazole, metconazole, tebuconazole, famoxadone, 살충제는 flonicamid, etofenprox, tebufenozide, flufenoxuron, pymetrozine, methoxyfenozide, flupyradifurone, 살선충제는 fosthiazate, 살응애제는 dimethoate가 문제가 되었으며, 국내 재래시장 및 대형마트에서 판매되고 있는 시료들을 2020년 10월에 수집하여 잔류농약 성분을 분석한 결과에서도 일부 재배농가는 배추에 등록되지 않은 농약인 procymidone을 사용하여 국내잔류허용치를 초과하는 수준이 검출되었다. 따라서 엽채류를 수출하고자 하는 농가에서는 재배 초기부터 문제가 될 수 있는 병해충이 발생하지 않도록 철저한 관리와 함께 반드시 등록된 농약을 농약안전사용 기준에 따라 살포하도록 지도하여야 할 필요가 있다. According to Korea’s fresh leafy vegetable export data for the 2015-2019 period, the export turnover for Kimchi cabbage (Brassica rapa subsp. pekinensis) and cabbage (B. oleracea var. capitata) to the Taiwanese market accounted for 79.5-97.2 % (out of seven countries) and 36.0- 96.2 % (out of nine countries), respectively. To export Korean leafy vegetable products to Taiwan, the Taiwanese Plant Protection Organization requires proof that the products are free from Frankliniella occidentalis and Ditylenchus dipsaci infection as an annex to the Phytosanitary Certification before clearance. In addition, data acquired from the National Institute of Agricultural Sciences of the Rural Development Administration revealed that the misapplication of flonicamid, etofenprox, tebufenozide, flufenoxuron, pymetrozine, methoxyfenozide, and flupyradifurone (as insecticides); diniconazole, metconazole, tebuconazole, and famoxadone (as fungicides); fosthiazate (as a nematicide); and dimethoate (as an acaricide) pose challenges. The application rates of such pesticides exceeded the maximum residue limits based on the quarantine requirements for exporting Kimchi cabbage and cabbage to Taiwan. Residual analysis results revealed that procymidone, a fungicide that is not registered for application on Kimchi cabbage, is still being used by farmers and its detection level surpassed the domestic limit of quantitation. Therefore, farmers who intend to export fresh leafy vegetables should monitor pests to facilitate early detection and use registered pesticides while adhering to safe use practices.

2018년 고위험해충 9종에 대한 예찰조사 보고

이지은,이효빈,기웅,김동순,김수빈,김효중,박종석,오재석,유영혁,이승환,이재하,정철의,조건호,홍기정,이원훈,Lee, Jieun,Lee, Hyobin,Ki, Woong,Kim, Dong-Soon,Kim, Subin,Kim, Hyojoong,Park, Jong-Seok,Oh, Jaeseok,Yu, Yeonghyeok,Lee, Seunghwan,Lee, Jaeha 한국응용곤충학회 2019 한국응용곤충학회지 Vol.58 No.3

고위험해충의 국내 유입 및 발생 여부를 조사하기 위한 예찰협력 네트워크 구성을 위해 7개 대학(경상대학교, 군산대학교, 서울대학교, 순천대학교, 안동대학교, 제주대학교, 충북대학교)이 참여하여 고위험해충 9종(Aceria diospyri, 오리엔탈과실파리(Bactrocera dorsalis), 일본과실파리(Bactrocera minax), Bactrocera tsuneonis, 코드린나방(Cydia pomonella), 포도애기잎말이나방(Lobesia botrana), Proeulia sp., 붉은불개미(Solenopsis invicta), Stephanitis takeyai)에 대한 예찰조사를 2018년 6월부터 10월까지 실시하였다. 전국을 7개 권역으로 구분한 뒤, 105개 지역 내 315개 지점에서 총 7,560개의 트랩운용/달관조사를 실시하였으며, 조사결과 A. diospyri, 오리엔탈과실파리, 일본과실파리, B. tsuneonis, C. pomonella, 포도애기잎말이나방, Proeulia sp., 붉은불개미, S. takeyai는 발견되지 않았다. 본 조사 연구를 통하여 고위험해충을 조기 탐지할 수 있는 전국단위의 감시체계를 구축하였으며, 국경 이후 외래침입해충들의 예찰조사를 위한 거점 지역을 확보하였다. To establish the cooperative monitoring network which can investigate introductions or outbreaks of high risk insect pests into Korea, seven universities, Gyeongsang National University, Kunsan National University, Seoul National University, Sunchon National University, Andong National University, Jeju National University, and Chungbuk National University, carried out seven regions' monitoring about nine high risk insect pests, Aceria diospyri, Bactrocera dorsalis, Bactrocera minax, Bactrocera tsuneonis, Cydia pomonella, Lobesia botrana, Proeulia sp., Solenopsis invicta, Stephanitis takeyai, from June to October in 2018. A total of 7,560 traps/visual scouting were investigated in 315 points of 105 local sites of seven regions, resulting the nine species, A. diospyri, B. dorsalis, B. minax, B. tsuneonis, C. pomonella, L. botrana, Proeulia sp., S. invicta, and S. takeyai, were not detected. From this study, we established the nationwide monitoring system which can early detect high risk insect pests and secured a bridgehead for monitoring invasive insect pests passing the border.

HEMM Al-SiO₂-X 복합 분말을 Al-Mg 용탕에서 자발 치환반응으로 제조된 Al-Si-X/Al₂O₃ 복합재료의 조직 및 마멸 특성

우기도,김동건,이현범,문민석,기웅,권의표,Woo, Kee-Do,Kim, Dong-Keon,Lee, Hyun-Bom,Moon, Min-Seok,Ki, Woong,Kwon, Eui-Pyo 한국재료학회 2008 한국재료학회지 Vol.18 No.6

Single-crystal $ZnIn_2S_4$ layers were grown on a thoroughly etched semi-insulating GaAs (100) substrate at $450^{\circ}C$ with a hot wall epitaxy (HWE) system by evaporating a $ZnIn_2S_4$ source at $610^{\circ}C$. The crystalline structures of the single-crystal thin films were investigated via the photoluminescence (PL) and Double-crystal X-ray rocking curve (DCRC). The temperature dependence of the energy band gap of the $ZnIn_2S_4$ obtained from the absorption spectra was well described by Varshni's relationship, $E_g(T)=2.9514\;eV-(7.24{\times}10^{-4}\;eV/K)T2/(T+489K)$. After the as-grown $ZnIn_2S_4$ single-crystal thin films was annealed in Zn-, S-, and In-atmospheres, the origin-of-point defects of the $ZnIn_2S_4$ single-crystal thin films were investigated via the photoluminescence (PL) at 10 K. The native defects of $V_{Zn}$, $V_S$, $Zn_{int}$, and $S_{int}$ obtained from the PL measurements were classified as donor or acceptor types. Additionally, it was concluded that a heat treatment in an S-atmosphere converted $ZnIn_2S_4$ single crystal thin films into optical p-type films. Moreover, it was confirmed that In in $ZnIn_2S_4$/GaAs did not form a native defects, as In in $ZnIn_2S_4$ single-crystal thin films existed in the form of stable bonds.

이중박동펌프를 이용한 체외생명구조장치의 효과

백광제,김준식,선경,손호성,기웅,한승백,민병구 대한응급의학회 2002 대한응급의학회지 Vol.13 No.4

Purpose: The purpose of this study was to observe and compare the changes in the patterns of hemodynamic and blood profiles on the circuit of Extra-corporeal life support system (ECLS) by using a dual pulsatile pump (T-PLS). Methods: An acute heart failure model using partial pulmonary artery banding was constructed in 12 piglets (20-25 ㎏). The animals were divided into centrifugal (n=6) and dual pulsatile pump (n=6) group. Each animal was placed on an ECLS system with a membrane oxygenator bypassing the right atrium and the aorta for 2 hours under general anesthesia. The parameters mainly observed were intra-circuit pressure changes, arterial pulsatility (pulse pressure), plasma free hemoglobin, hemodynamic changes, and other blood profiles. The parameters obtained just prior to the bypass wee compared with the corresponding parameters obtained two hours after the bypass. Results: Before bypass, the parameters were statistically the same between the groups. Two hours after the bypass, no significant differences were observed between the groups in ABGA, VBGA,, AST/ALT, BUN/Cr, and electrolytes; the plasma free hemoglobin was 14.8±4.7 g/dl in the dual pulsatile group and 19.1±9.1 g/dl in the centrifugal group (p=NS). The pulse pressure was higher in the dual pulsatile pump than in the centrifugal pump group (35±8 vs. 11±7 mmHg, p=0.0253 mmHg). The highest circuit pressure was generated at the inlet of the membrane oxygenator and was higher in the dual pulsatile group than in the centrifugal group (173±12 mmHg vs. 222±8 mmHg, p=0.0000). Conclusion: The results demonstrate that a dual pulsating mechanism lessens blood cell trauma while providing physiologic pulsatile blood flow. The ECLS system using a dual pulsatile pump (T-PLS) can be useed as an effective and safe driving motor for an ECLS.