• 제목/요약/키워드: amine

검색결과 1,527건 처리시간 0.025초

변성아민 처리된 부직포를 이용한 복합방수공법의 도막·시트 간 화학적 일체화에 관한 연구 (A Study on the Chemical Integration between Coating Sheets of Complex Waterproofing Method Using Modified Amine-Treated Nonwoven Fabric)

  • 김선도;김진성
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2017년도 추계 학술논문 발표대회
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    • pp.118-119
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    • 2017
  • The combined waterproofing method is an excellent method to overcome the disadvantages of the single waterproofing method by composing two or more materials to complement each other, but it is a method that can cause defects such as separation and peeling between materials due to the heterogeneity of the applied two materials. In order to improve this, in this study, we aimed to develop a technology for inducing chemical unification between materials through a urea reaction with a coating material applied on the lower side by laminating a nonwoven fabric treated with a modified amine on the back surface of the sheet material, The adhesion performance test was carried out with the presence or absence of denatured amine treated nonwovens as variables. As a result of the test, it was confirmed that the adhesion performance of the specimen to which the modified amin - treated nonwoven fabric was applied was improved by about 60% or more as compared with the specimens not having the denatured amine treated specimen.

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장류(醬類)에 있어서 2급(級) Amine의 형성(形咸) -제2보(第2報) 재래식(在來式) 간장숙성중(熟成中) 2급(級) amine의 동태(動態)- (Formation of Secondary Amines in Soysauce and Soy-paste -Part 2. Periodical changes of sceondary amines during Korean soysauce aging-)

  • 양희천;권태영
    • 한국식품과학회지
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    • 제11권1호
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    • pp.32-41
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    • 1979
  • 재래식(在來式) 간장에 있어서 2급(級) amine의 생성요인(生成要因)을 구명(究明)하고저 메주에서부터 간장의 숙성(熟成) 및 달이기까지의 전과정(全過程)에 걸쳐 2급(級) amine의 동태(動態)를 조사(調査)하였던바 다음과 같은 결과(結果)를 얻었다. 1. 일반가정(一般家庭)의 재래식(在來式) 메주는 Aspergillus oryzae를 인공접종(人工接種)하여 제조(製造)한 메주보다 2급(級) amine의 함량(含量)이 7배이상(倍以上) 높아서 평균(平均) 20.86 ppm이 검출(檢出)되었다. 또한 재래식(在來式) 메주중(中)에서도 변패도(變敗度)가 높은 메주일수록 2급(級) amine의 함량(含量)이 높았다. 2. 장류제조(醬類製造)의 원료(原料)인 콩, 밀, 쌀 및 보리에서도 소량(少量)의 2급(級) amine이 검출(檢出)되었는데 콩 1.28ppm, 밀 0.57ppm, 쌀 0.35ppm, 보리 0.34ppm이었다. 이들을 원료(原料)로 제조(製造)한 코오지에서는 보다 많은 양(量)의 2급(級) amine이 검출(檢出)되어 콩코오지는 2.63ppm, 밀은 1.09ppm, 쌀과 보리는 0.54, 0.64 ppm 수준(水準)이었다. 3. 재래식(在來式) 간장의 90일간(日間)의 숙성과정(熟成過程)에서 정상적(正常的)인 발효(醱酵)가 진행(進行)되는한 메주에서 유래(由來)하는 외(外)에 새로운 2급(級) amine의 생성(生成)은 없었다. 4. 재래식(在來式) 메주를 사용(使用), 식염농도(食鹽濃度)를 $12{\sim}26%$수준(水準)으로 간장을 담그었던바 일광(日光)을 충분(充分)이 쪼이는 조건(條件)에서는 2급(級) amine의 생성(生成)이 없었으나 암소(暗所)에서는 18%이하구(以下區)에서 메주로부터의 용출예상량이상(溶出豫想量以上)의 2급(級) amine이 검출(檢出)되었다. 5. Aspergillus oryzae를 인공접종(人工接種)하여 메주를 만들고 식염농도(食鹽濃度)를 $14{\sim}26%$수준(水準)으로 간장을 담그어 일광(日光)이 충분(充分)히 쪼이는 곳에서 숙성(熟成)시켰던 바 용출예상량이상(溶出豫想量以上)의 2급(級) amine이 검출(檢出)되지 않았다. 6. 메주의 건조(乾燥)나 간장 달이기에 의(依)한 2급(級) amine의 휘산효과(揮散效果)는 기대(期待)할 수 없었다.

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Investigation of anti-wear additives for synthetic esters; Amine salts of phosphonic acid

  • Hasegawa, T.;Minami, I.;Kidera, Y.;Hirao, K.;Memita, M.
    • 한국윤활학회:학술대회논문집
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    • 한국윤활학회 2002년도 proceedings of the second asia international conference on tribology
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    • pp.269-270
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    • 2002
  • Antiwear(AW) properties of phoshphonic acid derivatives for trimethylolpropane (TMP) esters were investigated under boundary conditions. AW effect of dialkyl phosphonates depends on polarity of base fluid. They provide good AW performance in less polar TMP esters, whereas their AW effect is not sufficient in polar TMP esters. Amine salts of phosphonic acid were developed as new AW additiνe system for TMP esters. They provide excellent AW performance even in polar TMP esters.

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A New Acetate Selective Polyamine Receptor Based on Anthracene and 4-Nitrophenyl Group

  • Lee, Sung-Kyu;Kang, Jong-Min
    • Bulletin of the Korean Chemical Society
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    • 제32권4호
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    • pp.1228-1230
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    • 2011
  • A new amine receptor 2 utilizing anthracene and nitrophenyl group as signaling group was designed and synthesized. The receptor 2 only utilizes four amine N-H's and 9-anthracenyl hydrogen to bind anions. The receptor 2 can bind anions through hydrogen bonds with a selectivity of $CH_3CO_2^-$ > $H_2PO_4^-$ > $F^-$ > $C_6H_5CO_2^-$ > $Cl^-$ in highly polar solvent such as DMSO without protonation of amine.

3급 아민염 및 4급 암모늄염의 Tetrathiocyanatocobaltate[II]에 의한 분석화학적 연구 (Studies on the Chemical Analysis of the Tertiary Amine Salt and Quaternary Ammonium Salt by Tetrathiocyanatocobaltate[II])

  • 엄동옥;이윤중
    • 약학회지
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    • 제24권3_4호
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    • pp.159-165
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    • 1980
  • Tetrathiocyanatocobaltate[II] forms complexes with tertiary amine salts or quarternary ammonium salts which were extractable from aqueous solution by organic solvent. In order to study composition of the complex, the colored crystalline complexes produced were evaluated with elemental analysis, infrared and mass spectra. And also a novel spectrophotometric method for the determination of tertiary amine salt or quarternary ammonium salt with tetrathiocyanatocobaltate[II] was established by organic solvent extraction within coefficient of variation of 1.06-1.35%.

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Presence of an Inducible Semicarbazide-Sensitive Amine Oxidase in Mycobacterium sp. Strain JC1 DSM 3803 Grown on Benzylamine

  • Ro Young-Tae;Lee Hyun-Il;Kim Young-Min
    • Journal of Microbiology
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    • 제44권2호
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    • pp.243-247
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    • 2006
  • Mycobacterium sp. strain JC1 was capable of growth on benzylamine as a sole source of carbon and energy. The primary deamination of benzylamine was mediated by an inducible amine oxidase, which can also oxidize tyramine, histamine, and dopamine. Inhibitor study identified this enzyme as a copper-containing amine oxidase sensitive to semicarbazide.

새로운 코직산 유도체의 합성과 티로시나제 저해활성 (Synthesis of Novel Kojic Acid Derivatives and Their Tyrosinase Inhibitory Activities)

  • 김지연;임세진
    • 약학회지
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    • 제43권1호
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    • pp.28-32
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    • 1999
  • Four derivatives of kojic acid were synthesized and their inhibitory activities against tyrosinase were evaluated. The C-2 hydroxymethyl and C-7 hydroxyl of kojic acid were replaced by carboxylate and amine, respectively. These derivatives were coupled to L-phenylalanine, producing two amide compounds. The carboxylate derivative (3), its amide compound (5), and the amine derivative (7) were weak inhibitors. The amide compound (9) where amine derivative (7) coupled to L-phenylalanine showed strong inhibitory activity ($IC_{50}=24.6{\;}{\mu}M$) comparable to kojic acid.

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Amine terminated polyetherimide/Epoxy 블렌드의 경화공정과 고강인성 복합재료에의 응용 (Curing Kinetics of Amine Terminated Polyetherimide/Epoxy Resin Blends and Its Application on the High Toughness Composites)

  • 김민영;김성호;이광기;김원호;안병현
    • 한국복합재료학회:학술대회논문집
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    • 한국복합재료학회 2001년도 추계학술발표대회 논문집
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    • pp.49-52
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    • 2001
  • The investigation of cure kinetics, morphology, and fracture toughness studies on epoxy resin/amine terminated PEI/Anhydride system were performed by differential scanning calorimetry and scanning electron microscopy. Modified autocatalystic kinetics model was applied by isothermal scan test. The fracture toughness for the neat epoxy resin was 2.15 MPa m0.5 and the fracture toughness was improved 45% as neat epoxy resin system. The generation of secondary phase of AT-PEI was observed and its size was grown up by increasing contents of PEI.

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아민 감지 화합물을 이용한 우레탄 나노웹과 라미네이팅 필름의 아민 가스 감지특성 연구 (Amine Gases Detecting Studies using the Compounds on the Urethane Nano Web and Laminating Film)

  • 이준희;서혜지;강유정;이도현
    • 한국염색가공학회지
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    • 제25권1호
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    • pp.70-74
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    • 2013
  • For amine gas detection, we incorporated two well-known isomers, 2-chloro-3,5-dinitro-benzotrifluoride and 4-chloro-3,5-dinitro-benzotrifluoride, in polyurethanes. Nanoweb and thin film were prepared by electrospinning and lamination, respectively, in order to compare their sensing behaviors. Moreover, we studied photophysical property using UV-Vis spectrometer and observed surface area through scanning electron microscope to compare between the Nanoweb and thin film. We found out that nanowebs exhibited high sensitivity specifically to primary amine gas.