• Title/Summary/Keyword: 3^{pulsed}$

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The Effects of Pulsed Electromagnetic Fields on Blood components, Antioxidant enzymes and Reactive Oxygen in Hyperlipidemic Rats (맥동전자장이 고지혈증 흰쥐의 혈액 성분, 항산화 효소 및 활성 산소에 미치는 영향)

  • Bang, Hyun-Soo;Jeong, In-Ho;Lee, Sang-Deok
    • Journal of Digital Convergence
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    • v.12 no.7
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    • pp.349-356
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    • 2014
  • The present study was aimed to investigate the effects of the application of pulsed electromagnetic fields on the blood components associated hyperlipidemia, antioxidant enzymes and reactive oxygen. The subjects were divided into three groups: General Diet, High fat Diet, High fat diet and pulsed electromagnetic fields. Pulsed electromagnetic field was applied with pulsed electromagnetic energy therapy equipment. The Glucose, free fatty acids, triglycerides, cholesterol and insulin was used to measure hyperlipidemia-related blood components, and the GSH, GRD, XO and MDA was used to measure antioxidant enzymes and reactive oxygen. The applied pulsed electromagnetic field has improved the concentrations of blood components and increasing GSH and GRD, that were decreased due to a high-fat diet and by reducing the increased MDA and XO to a level of general diet group. Therefore, the applied pulsed electromagnetic field can be the effective treatment for changes in the blood composition of hyperlipidemic rats, enhancement of antioxidative activity and the inhibition of reactive oxygen.

Investigation of Diazepam by Pulsed Rotation Voltammetry

  • Blaedel, W.J.;Hahn, Young-Hee
    • Archives of Pharmacal Research
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    • v.2 no.2
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    • pp.111-114
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    • 1979
  • Diazepam was investigated in aqueous buffer media using pulsed rotation voltammetry. The dependence of half-wave potentials on pH indicated a two proton involvement in a two electron transfer reduction in the pH range 3-10. Dizaepam at micromolar concentration levels may be determined by measurement of the limiting difference current.

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ZnO Nanostructure Formed by Off-axis Pulsed Laser Deposition (Off-axis 펄스레이저 증착법으로 성장된 ZnO 나노구조에 관한 연구)

  • 강정석;강홍성;김재원;이상렬
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.17 no.3
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    • pp.319-322
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    • 2004
  • ZnO nanostructures were formed on a Si substrate by off-axis pulsed laser deposition(PLD) system in which a substrate plane was tilted toward a plume propagation direction. Atomic force microscopy (AFM) showed islands of 20∼40 nm width. From the x-ray diffraction (XRD) pattern exhibiting only (002) ZnO peak, the islands observed in AFM image were found to well crystallized. Optical bandgap enlargement from 3.26 eV to 3.35 and 3.47 eV due to the quantum size effect of ZnO nanostructures were observed by Photoluminescence (PL) at room temperature.

Measurement of a Pulsed Jet with High-Definition 3D-PTV (고해상 3차원 PTV에 의한 돌발분류구조 계측)

  • Doh Deog-Hee;Hwang Tae-Kue;Cho Yong-Beom;Pyeon Yong-Beom;Kobayashi Toshio;Tetsuo Saga
    • 한국가시화정보학회:학술대회논문집
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    • 2002.11a
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    • pp.43-44
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    • 2002
  • A pulsed jet was measured with high-definition 3D-PTV technique. The measurement system consists of three CCD cameras, Ar-ion laser, an image grabber and a host computer. Two fitness functions were introduced in a genetic algorithm in order to enhance the correspondences of the particles. One was based on a concept of the continuum theory and the other one was based on a minimum distance error. The head vortex of the jet was visualized by LIF and was reconstructed by the constructed high-resolution 30-PTV system for comparisons.

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Structure and optical Properties of $Gd_{2}O_{3}$ thin films on glass Prepared by Pulsed Laser Deposition (레이저 층착법에 의해 형성된 $Gd_{2}O_{3}$박막의 구조와 광학적 특성)

  • Lee, Kyoung-Cheol;Lee, Cheon;Cho, S.;Park, J.C.
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2001.07a
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    • pp.362-364
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    • 2001
  • The pulsed laser deposition(PLD) technology was used for the deposition of phosphor substance, Gd$_2$O$_3$on commercial glass. An Nd:YAG laser was employed for the deposition (wavelength 266nm, energy up to 100mJ/pu1se, pulse duration is 5ns and repetition rate 10 Hz). With respect to films grown by conventional PLD, this study exhibited the condition at normal temperature. Experiments were done without any reactive gas at a pressure of 10$^{-5}$ ~10$^{-6}$ Torr using second harmonic(λ=532 nm) and fourth harmonic(λ=266 nm) Nd:YAG laser. Analyses of the deposited material grown are performed by EDX, AFM, SEM, PL meseurements.

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Enhancement of the Ferroelectric Properties of Pb(La1Ti)O3 Thin Films with Pb(La1Ti)O3Buffers Fabricated by Pulsed Laser Deposition (PLT buffer층의 삽입에 따른 강유전 PZT박막의 특성 향상)

  • Lim, Sung-Hoon;Lee, Eun-Sun;Chung, Hyun-Woo;Jeon, Kyung-Ah;Lee, Sang-Yeol
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.18 no.2
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    • pp.105-108
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    • 2005
  • The Pb(Zr,Ti)O$_3$ thin films were fabricated with Pb(La,Ti)O$_3$ buffers in-situ onto Pt/Ti/SiO$_2$/Si substrates by pulsed laser deposition method. We have observed the increase of the remanent polarization using PLT buffers. The remanent polarization value of 33.4 $\mu$C/$\textrm{cm}^2$ and the coercive field value of 66.4 kV/cm were obtained when the PLT tufter was deposited for 15 seconds. Enhancement of the polarization is resulted from the enhanced orientation of PZT thin film because of the PLT buffet layer.

Enhancement of the ferroelectric properties of $Pb(Zr,Ti)O_3$ thin films with $Pb(La,Ti)O_3$ buffers fabricated by pulsed laser deposition (PLT buffer층의 삽입에 따른 강유전 PZT박막의 특성 향상)

  • Lim, Sung-Hoon;Lee, Eun-Sun;Chung, Hyun-Woo;Lee, Sang-Yeol
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2004.07a
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    • pp.67-69
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    • 2004
  • The $Pb(Zr,Ti)O_3$ thin films were fabricated with $Pb(La,Ti)O_3$ buffers in-situ onto $Pt/Ti/SiO_2/Si$ substrates by pulsed laser deposition technique using a Nd:YAG laser with energy density of $2.5J/cm^2$, and deposited for 10 minutes at $550^{\circ}C$ of substrate temperature. And then, the films have been annealed at $550^{\circ}C$ in oxygen ambient pressure. The remanent polarization value is increased by using buffer layers but coercive field of films is slightly increased.

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Fabrication of $(Pb,La)TiO_3$ Thin Films by Pulsed Laser Ablation (레이저 어블레이션에 의한 $(Pb,La)TiO_3$ 박막의 제작)

  • Park, Jeong-Heum;Kim, Joon-Han;Lee, Sang-Yeol;Park, Chong-Woo;Park, Chang-Yub
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.11 no.2
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    • pp.133-137
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    • 1998
  • $(Pb_{0.72}La_{0.28})Ti_{0.93}O_3(PLT(28))$ thin films were fabricated by pulsed laser deposition. PLT films deposited on $Pt/Ti/SiO_2/Si$ at $600^{\circ}C$ had a preferred orientation in (111) plane and at $550^{\circ}C$ had a (100) preferred orientation. We found that (111) preferred oriented films had well grown normal to substrate surface. This PLT(28) thin films of $1{\mu}m$ thickness had dielectric properties of ${\varepsilon}_r$=1300, dielectric $loss{\fallingdotseq}0.03 $. and had charge storage density of 10 [${\mu}C/cm^2$] and leakage current density of less than $10^{-6}[A/cm^2]$ at 100[kV/cm]. These results indicated that the PLT(28) thin films fabricated by pulsed laser deposition are suitable for DRAM capacitor application.

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Fabrication of Organic Thin Films by Pulsed Laser Deposition (펄스 레이저 증착법을 이용한 유기 박막의 제작)

  • Park, Sang-Moo;Lee, Boong-Joo
    • Journal of the Korean Vacuum Society
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    • v.17 no.5
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    • pp.455-460
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    • 2008
  • In recent years, there has been highly interestedin pulsed laser deposition (PLD) method for fabrication of the organic thin films, as an alternative to conventional fabrication method such as vacuum evaporation and spin coating techniques. In this study, organic thin films of $Alq_3$ (aluminato-tris-8-hydroxyquinolate) and TPD for organic light emitting diodes (OLED) were deposited by PLD using KrF excimer ($\lambda$=278 nm) laser in nitrogen atmosphere. Deposited films were evaluated by photoluminescence(PL), Fourier-transform Infrared Spectroscopy (FT-IR) to study the effect of the laser and $N_2$ atmosphere parameters on the structural and optical properties.