• Title/Summary/Keyword: Basic Characterization

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Characterization of Aluminum Oxide Thin Film Grown by Atomic Layer Deposition for Flexible Display Barrier Layer Application

  • Kopark, Sang-Hee;Lee, Jeong-Ik;Yang, Yong-Suk;Yun, Sun-Jin
    • 한국정보디스플레이학회:학술대회논문집
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    • 2002.08a
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    • pp.746-749
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    • 2002
  • Aluminum oxide thin films were grown on a poly ethylene naphthalate (PEN) substrate at the temperature of 100$^{\circ}C$ using atomic layer deposition method. The film showed very flat morphology and good adhesion to the substrate. The visible spectrum showed higher transmittance in the range from 400 nm to 800 nm than that of PEN. The water vapor transmission value measured with MOCON for 230nm oxide-deposited PEN was 0.62g/$m^2$/day @ 38$^{\circ}C$, while that of PEN substrate was 1.4g/$m^2$/day @ 38$^{\circ}C$.

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Synthesis and Characterization of a Receptor-Targeting Contrast Agent

  • Yang, Taegyun;Park, Ji-Hyung;Lee, Seung-Cheol;Kim, Cheol-Su;Cho, Jee-Hyun;Lee, Chul-Hyun;Cheong, Chae-Joon
    • Journal of the Korean Magnetic Resonance Society
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    • v.7 no.1
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    • pp.46-54
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    • 2003
  • We synthesized a contrast agent for MRI that is capable of binding to the ABP-1 receptor and enhancing the contrast of the targeted cells. We used a lysine dendrimer (G=3)DTPA[Gd] as the contrast agent and synthesized a biotinylated polyclonal antibody for ABP-1 as the first antibody. Lysine dendrimers were prepared using the solid phase peptide synthesis method.$^3$ Amino-terminated lysine dendrimers were then coupled to DTPA using the anhydride method. Gd was complexed with the DTPA-lysine dendrimer in an acidic solution of 3 eq GdCl$_3$ to one of DTPA. The lysine dendrimer-DTPA[Gd] and avidin were conjugated in MES solution, pH 6.0, using EDC as the coupling reagent. The biotin-avidin system was used to link the polyclonal antibody and contrast agent. K562 cells were used for imaging.

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Characterization of Basic Nitrogen-Containing Compounds in the Products of Lube Base Oil Processing by Electrospray Ionization Fourier Transform Ion Cyclotron Resonance Mass Spectrometry

  • Li, Xiaohui;Zhu, Jianhua;Wu, Bencheng
    • Bulletin of the Korean Chemical Society
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    • v.35 no.1
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    • pp.165-172
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    • 2014
  • The distribution of basic nitrogen-containing compounds in three vacuum gas oils (VGOs) with different boiling ranges and their dewaxed oils from the lube base oil refining unit of a refinery were characterized by positive-ion electrospray ionization (ESI) Fourier transform-ion cyclotron resonance mass spectrometry (FT-ICR MS). It turned out that the composition of basic nitrogen compounds in the samples varied significantly in DBE and carbon number, and the dominant basic N-containing compounds in these oil samples were N1 class species. $N_1O_1$, $N_1O_2$, and $N_2$ class species with much lower relative abundance were also identified. The composition of basic nitrogen compounds in VGOs and dewaxed VGOs were correlated with increased boiling point and varied in DBE and carbon numbers. The comparison of the analytical results between VGOs and dewaxed VGOs indicated that more basic N-containing compounds in VGO with low carbon number and small molecular weight tend to be removed by solvent refining in lube base oil processing.

Characterization of Drawn Polyethylene by Solid State $^{13}C$ Magic Angle Spinning NMR

  • Han, Oc-Hee
    • Journal of the Korean Magnetic Resonance Society
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    • v.2 no.1
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    • pp.24-32
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    • 1998
  • Drawn polyethylene was studied by 13C cross polarization magic angle spinning techniques. Solid-solid phase transition from orthorhombic to monoclinic crystalline phase by drawing was observed. In addition, using a synchronized magic angle spinning 2 dimension technique, we confirmed that macroscopic ordering of the polyethylene was produced by drawing.

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ANNIHILATORS OF SUBTRACTION ALGEBRAS

  • JUN, YOUNG BAE
    • Honam Mathematical Journal
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    • v.27 no.3
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    • pp.333-341
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    • 2005
  • A characterization of prime ideals is discussed. A relation between prime ideals and ideals of the form $A_w^{\wedge}$ is given. The prime ideal theorem is established. The notion of annihilators is introduced, and basic properties are investigated.

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