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Determination of Trichlorfon Pesticide Residues in Milk via Gas Chromatography with μ-Electron Capture Detection and GC-MS

  • Hem, Lina;Khay, Sathya;Choi, Jeong-Heui;Morgan, E.D.;El-Aty, A.M. Abd;Shim, Jae-Han
    • Toxicological Research
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    • v.26 no.2
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    • pp.149-155
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    • 2010
  • The pesticide trichlorfon is readily degraded under experimental conditions to dichlorvos. A method has therefore been developed by which residues of trichlorfon in milk are determined as dichlorvos, using gas chromatography with ${\mu}$-electron capture detection. The identification of dichlorvos was confirmed by mass spectrometry. Milk was extracted with acetonitrile followed by centrifugation, freezing lipid filtration, and partitioning into dichloromethane. The residue after partitioning of dichloromethane was dissolved in ethyl acetate for gas chromatography. Recovery concentration was determined at 0.5, 1.0, and 2.0 of times the maximum permitted residue limits (MRLs) for trichlorfon in milk. The average recoveries (n = 6) ranged from 92.4 to 103.6%. The repeatability of the measurements was expressed as relative standard deviations (RSDs) ranging from 3.6%, to 6.7%. Limit of detection (LOD) and limit of quantification (LOQ) were 3.7 and $11.1{\mu}g/l$, respectively. The accuracy and precision (expressed as RSD) were estimated at concentrations from 25 to $250{\mu}g/l$. The intra- and inter-day accuracy (n = 6) ranged from 89.2% to 91% and 91.3% to 96.3%, respectively. The intra- and inter-day precisions were lower than 8%. The developed method was applied to determine trichlorfon in real samples collected from the seven major cities in the Republic of Korea. No residual trichlorfon was detected in any samples.

The Relationship of the Body Surface Development Figure with the Sleeve Basic Pattern in the Standing and Arm-Movement Positions (정립시 및 동작시 팔의 체표면 전개도와 소매원형의 관계)

  • Cho, Kyunghee
    • Journal of Fashion Business
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    • v.17 no.1
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    • pp.170-185
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    • 2013
  • The suitability of the pattern manufactured with the development figure was considered by reviewing the development conditions that can be directly connected to the basic pattern in the human body surface development figure with the cast bandage method. The method to prepare the sleeve basic pattern was based on the cylindrical surface development method, and the sleeve basic pattern covering the 45 and 90 degrees momentum of the arm-movement was made by using the cast-type body surface development figure prepared with the horizontal line of the sleeve hem placed horizontally in the plan and by combining the cast-type body surface development figure in the standing position with the figure in the moving position. The test clothing was prepared with the sleeve pattern adding the bodice pattern in the standing position and the momentum and was worn on the FRP replica. The relationship theory of the body surface development figure with the pattern was derived by reviewing the suitability from the wearing state. The sleeve-cap height of the sleeve basic pattern resulted in about 80% in the standing position when the needs for a physical activity are 45 degrees and the about 50% when the needs for a physical activity are 90 degrees. The additional size of the diagonal length of the sleeve-cap could be set as "0" if the sleeve-cap height is low by 50% and as 50% of the additional size in the standing position if the sleeve-cap height is 80%.

Polymerization and Effect of Organic/Organic Core Shell Binder (Organic/organic Core Shell 바인더의 중합과 처리영향)

  • Sim, Dong-Hyun;Ban, Ji-Eun;Kim, Min-Sung;Seul, Soo-Duk
    • Polymer(Korea)
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    • v.32 no.5
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    • pp.470-477
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    • 2008
  • Core shell binder of organic/organic pair that has two different properties within a particle were prepared by a step emulsion polymerization of methacrylate (MMA), styrene (St), ethyl acrylate (EA), butyl acrylate (BA), and 2-HEMA by using an water soluble initiator(APS) in the presence of an anionic surfactant (SDBS). Unwoven tensile strength of the core shell binder after processing and measuring the PSt/PMMA/2-HEM core shell with the binder is a value represents the highest was $10.75\;kg_f$/2.5cm, elongation measurements PEA/PBA core shell binder showed the highest value was 120.00%. In conclusion, using the core shell binders were able to control the mechanical properties such as tensile strength and elongation.

The Modern Chinese Literature and Philosophy of Nietzsche: Focusing Acceptance of the Nietzsche's Philosophy on Guo Mo Ruo and Mao Dun (중국신문학과 니체철학 - 곽말약(郭沫若)과 모순(茅盾)의 니체사상 수용을 중심으로)

  • Ko, Hae-kyung
    • Cross-Cultural Studies
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    • v.33
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    • pp.241-262
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    • 2013
  • Nietzsche in the early 20th century, many Western thought came to China pushed the time, who want to reform the Chinese young intellectuals was a great welcome. Around 5.4 times writers representing China Journalism Guo Mo ruo Mao Dun and social needs of the times according to the spirit, according to their ideology, no tubes and four optional understand Nietzsche. Was acceptable, in the process, Nietzsche was transformed hem into various forms. In this paper, two Guo Mo ruo Mao Dun accept Nietzsche as Nietzsche socreated their own awards and also looked at these similarities and difference. Nietzsche Guo Mo ruo the remnants of the old feudal ideas and traditions were to break down and accept only select perspective. Nietzsche's self-discovery and individual liberty, and against the reality and accept the terms of loan 5.4 seconds, an ideal Nietzsche award was created. However Guo Mo ruo particular aspect of the acceptance of Nietzsche, whereas Nietzsche regarded as an extreme pessimist history, and his extreme caution and idealistic form of individualism was often criticized. Mao Dun the core ideas of Nietzsche 'Superman' and 'will power' noted. 5.4 All time view of life, a new morality must re-evaluate the need for a practical, based on the old tradition of Nietzsche completely against the spirit of rebellion was to have especially appreciated. But this was different Mao Dun Nietzsche and moral beliefs. What is the old morality Nietzsche corrupt, bourgeois morality and ethics, and was negative for democracy and freedom, Mao Dun dark realities facing the old Chinese feudal and traditional idea ofrevolution as a democrat were negative for. Guo Mo ruo Mao Dun optional for Nietzsche's acceptance was 5.4 times that contemporary needs can be met.

A study on the visual image of men's suit (남성 정장 수트의 시각적 이미지에 관한 연구)

  • Kim, Jeong-Mee
    • Journal of the Korea Fashion and Costume Design Association
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    • v.23 no.1
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    • pp.113-127
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    • 2021
  • This study aims to analyze the style of men's suits and extract expressional words for the development of semantic differential scales of visual images according to the change in silhouette. Research methods are literature studies, case studies, and questionnaires. The stimuli were created using CLO 3D, a virtual sewing CAD. This study's results are as follows: 1) The British suit jacket has an angled shoulder line using thin pads, and a slightly higher waistline. The pants of the suit have a high waistline and two pleats, so the thighs of the pants are wide. The American suit jacket has a natural shoulder line, and the waistline is not emphasized. The width of the jacket is relaxed, and the length is long. The pants of the suit have a higher waistline, and the pants are wide as well. The Italian suit jacket has wide shoulders, and the waistline is connected lower with a soft curve, and the length is relatively short. The trousers of the suit are tapered and get narrower as it goes down to the hem. 2) Because it originated in the practices of true bespoke tailoring, traditional British suits have a far more 'fitted' silhouette than the mass-produced styles that became emblematic of the American style. By the late 1950s, a sack-style suit was standard American business attire. This technique gives the sack suit its characteristically 'boxy' silhouette. The "Continental" presented a highly tailored silhouette, with padded shoulders, a slim, tight-fitting chest, and a closely tapered waist. The story was that Italian culture valued aesthetics over all else and thus sought the 'slim' suit style as much as possible. 3) The main expressional words of visual images for men's suits differ greatly depending on the silhouette of suit. The visual images are ranked in the order of 'neat', 'classic', 'educated', 'hard', 'mature', for fitted silhouettes. The words of 'masculine', 'basic', 'comfortable', 'simple', 'mature', 'conservative', 'modern', are ranked for boxy silhouettes. And the words of 'slim', 'young', 'neat', are noted for slim silhouettes.

A Comparative Study on Preference of the Korean Army's Flight Jacket According to Working Environment (근무 환경에 따른 육군 비행재킷의 선호도 비교 연구)

  • Choi, Hee Eun;Choi, Kueng-mi
    • Fashion & Textile Research Journal
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    • v.22 no.6
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    • pp.844-852
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    • 2020
  • This study is to understand the preferences of pilots, flight engineers and crew who work in the same aircraft but are exposed to different working environments and perform different mission operations in order to develop an ergonomic flight jacket. Based on a preliminary investigation, a survey of 107 pilots and 36 flight engineers and crew was conducted. The results are as follows; Pilots can control the temperature inside the cockpit, so they are less exposed to the cold when working, while flight engineers and crew are exposed to the cold more because they have many external tasks. The reason for the problem of the current flight jacket was a difference in ranking between two groups, but the highest ranking was poor dimensional suitability due to the habit of wearing layers of clothing. As a result of preferred design, there were significant differences between groups in the item of overall style. Pilots preferred a bomber jacket style(P:68.2%, E&C:44.4%), on the other hand, flight engineers and crew preferred a field jacket style(P:26.2%, E&C:55.6%)(p<.01). They preferred a stand collar(P:71.0%, E&C:86.1%), a fastener slider for a front fastening(P:62.6%, E&C:61.1%), fastener tape cuffs(P:54.2%, E&C:47.2%), a jacket with a softshell(P:86.9%, E&C:83.3%), fleece as softshell material(P:88.8%, E&C:69.4%), and fastener sliders as a attaching method(P:69.2%, E&C:61.1%). A hem fastening will be selected differently according to the overall style of outshell. Additionally, they preferred more than 5ea pockets(P:51.4%, E&C:44.4%), fastener sliders as pocket's fastenings(P:48.6%, E&C:61.1%), armpit ventilations(P:62.9%, E&C:58.5%). The results of above will be considered to design an ergonomic flight jacket.

Paddy Weeds Serving as the Possible Reservoirs for Rice Bacterial Leaf Blight (답잡초를 대상으로 벼 흰빛잎아름병 기주절위구명)

  • Kim, K.U.;Jeh, S.Y.;Sohn, J.K.;Lee, S.K.
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.26 no.1
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    • pp.40-44
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    • 1981
  • This study was conducted to identify the possibility of paddy weeds served as the host plant of bacterial leaf blight, using various bacterial groups and inoculation methods. The results obtained can be summarized as follows. 1. Alopecurns spp., Setaria viridis P. Beauv., and Leersia juponica Makino were identified the most susceptible to bacterial leaf blight, similar to Milyang 23 which was used as a susceptible check variety. The others such as Digitaria adscendens Hem., Eleusine indic aGaertin., Cyperns serotinus Rottb, Cyperns difformis L. showed slight infection but most of broadleaf weeds were resistant to bacterial leaf blight. 2. Weed species showing early susceptibility maintained their susceptibility throughout the growth stages. Group I of bacterial leaf blight was the most effective to develop infection symptom to weeds. 3. Pin and scissor inoculation methods were more effective mean for infection than spray method which was used without wound.

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Correlationship Analysis of between Phosphosugar Size Extraction and Big 5 Model Personality (인당 크기 추출과 5대 성격 특징간의 상관성 분석)

  • Seo, Kyoung-Won;Bae, Jung-Su;Kang, Deok-Hyun;Jang, Yong-Jo;Yean, Yong-Hem;Lim, Soon-Yong;Min, Ji-Seon;Kim, Bong-Hyun;Ka, Min-Kyoung;Cho, Dong-Uk
    • Proceedings of the Korea Information Processing Society Conference
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    • 2010.11a
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    • pp.652-655
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    • 2010
  • 관상학이란 사람의 인상을 관찰하여서 사람의 운명을 판단하고, 그 얻어진 결론을 가지고 길흉의 방법을 구하는 학문이라고 할 수 있다. 사람은 누구나 다른 사람을 볼 때 그 사람의 아름다움이나 추함보다는 인상이 눈에 먼저 들어오는 것은 당연하다고 할 수 있다. 그 얼굴에 인상이 뚜렷하게 나타나는 곳 중 제일은 인당 일 것이다. 따라서 본 논문에서는 외모만으로 성격을 판별하거나 몸매 혹은 얼굴생김에서 직관적 인지를 얻어내는 관상학을 통해 인당의 크기에 따른 성격을 영상 처리 기술로 구현하였다. 즉, 인당은 눈썹과 눈썹사이의 가운데 부분을 말하며, 미간이라고도 부른다. 이와 같은 인당의 크기에 따라 성격의 주요 5대 특징과의 상관성 분석을 통해 눈썹에 따른 성격의 차이를 분석하는 연구를 수행하였다.

Change Measurement of Voice Analysis Parameter by an Increase of Intake the Caffeine (카페인 섭취량 증가에 따른 음성 분석 요소의 변화 측정)

  • Seo, Kyoung-Won;Jang, Yong-Jo;Kang, Deok-Hyun;Bae, Jung-Su;Yean, Yong-Hem;Lim, Soon-Yong;Min, Ji-Seon;Kim, Bong-Hyun;Ka, Min-Kyoung;Cho, Dong-Uk
    • Proceedings of the Korea Information Processing Society Conference
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    • 2010.11a
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    • pp.656-659
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    • 2010
  • 오늘날 현대 사회에서 여가생활시간이 늘어나고 이에 따라 사람들은 잦은 커피타임을 갖고 있으며 이로 인해 커피의 섭취량이 날로 늘어나고 있다. 날로 늘어나는 커피 섭취량과 같이 커피의 주성분인 카페인 섭취량 또한 날로 증가 하고 있다. 따라서 본 논문에서는 카페인의 성분과 효능, 인체에 미치는 영향 정도와 음성에 관여하는 정도 등에 대한 결과를 추출하여 실질적으로 카페인이 음성에 미치는 요소를 분석하였다. 이를 위해 본 논문에서는 음성분석 프로그램인 Praat를 사용하였으며 성대의 변화량과 몸 속의 공명음인 Formant를 실험 요소로 적용하였다. 데이터 자료에서 유용성을 입증하고 문제점 해결에 대해 분석하였으며 실험에 의해 제안한 방법의 활용성을 입증하는 연구를 수행하였다.

A Study on Correlationship Anlaysis of Testosterone and Heart Diseases by the Third Finger Length (무명지 길이에 의한 테스토스테론과 심장 질환과의 상관성 분석 연구)

  • Seo, Kyoung-Won;Kang, Deok-Hyun;Bae, Jung-Su;Jang, Yong-Jo;Yean, Yong-Hem;Lim, Soon-Yong;Min, Ji-Seon;Kim, Bong-Hyun;Ka, Min-Kyoung;Cho, Dong-Uk
    • Proceedings of the Korea Information Processing Society Conference
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    • 2010.11a
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    • pp.1422-1425
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    • 2010
  • 현대 사회에서 심장 질환은 3대 사망요인 중 하나로 매우 위험한 질환으로 분류되고 있으며 이에 의한 사망률이 매년 증가하는 추세이다. 기존의 의학적 상식에 의하면 스테로이드계의 남성 호르몬인 테스토스테론은 심장 질환과 관련이 있다고 되어 있다. 테스토스테론은 남성에게 중요한 호르몬으로 적당량이 분비되어야 건강하지만 너무 적게 분비가 되면 남성에게 있어 여러 가지의 병의 원인이 된다. 이와 같은 테스토스테론은 남성의 무명지의 길이에 영향을 주는데 분비량에 비례하여 무명지의 길이가 검지에 비해 길어진다. 따라서 본 논문에서는 심장 질환자와 정상인의 무명지 길이와 검지 길이를 비교, 분석하여 무명지의 길이와 심장 질환의 상관관계를 분석하였다.