Search results for: J. H. Je

Items from 1 to 12 out of 12 results

article

Systematic review with meta‐analysis: the efficacy and safety of tenofovir to prevent mother‐to‐child transmission of hepatitis B virus

M. H. Hyun, Y.‐S. Lee, J. H. Kim, J. H. Je, more

Alimentary Pharmacology & Therapeutics > 45 > 12 > 1493 - 1505

Background Preventing mother to child transmission of chronic hepatitis B infection in the setting of a high maternal viral load is challenging. The idea has emerged from antepartum tenofovir treatment with combination immunoprophylaxis. Aims To demonstrate the efficacy and safety of tenofovir to prevent mother to child transmission of hepatitis B virus. Methods PubMed, EMBASE, and Cochrane databases...

chapter

Thermal and lattice misfit stress relaxation in growing AIN crystal with simultaneous evaporation of SiC substrate

T. S. Argunova, M. Yu. Gutkin, K. D. Shcherbachev, S. S. Nagalyuk, more

2016 European Conference on Silicon Carbide & Related Materials (ECSCRM) > 1

2016 European Conference on Silicon Carbide & Related Materials (ECSCRM)

AlN single crystals were prevented from cracking by simultaneous growth and evaporation of SiC substrates. Freestanding layers (≤1 mm thick) were proved continuous (non-cracked) and used as a model system to investigate the type of dislocation structure near AlN/SiC interface. Using x-ray diffraction techniques, we found that, unlike GaN films, in which high-density threading dislocations cross the...

article

Microstructure and strength of AlN–SiC interface studied by synchrotron X-rays

T. S. Argunova, M. Yu. Gutkin, K. D. Shcherbachev, J. H. Je, more

Journal of Materials Science > 2017 > 52 > 8 > 4244-4252

Bulk AlN crystals grown by sublimation on SiC substrates exhibit relatively high dislocation densities. The kind of defect formation at early growth stages influences the structural quality of the grown crystals. In this work, the dislocation distribution near to the interface is understood through investigation of thin (≤1.5 mm) continuous (non-cracked) freestanding crystals obtained in one process...

chapter

First stage of nucleation of GaN on (0001) sapphire

Y B Kwon, J H Je, P Ruterana, G Nouet

Springer Proceedings in Physics > Microscopy of Semiconducting Materials > Epitaxy: Wide Band-Gap Nitrides > 21-24

The origin of threading dislocations (TDs) in GaN epitaxial layers grown on sapphire (0001) substrate is investigated using moiré fringes from plan-view transmission electron microscopy. The studied samples are nucleation layers deposited at 540°C for times ranging from 20s to 180s. This initial stage growth gives rise to islands which are randomly rotated and relaxed with misfit dislocations. The...

article

X‐ray‐induced Cu deposition and patterning on insulators at room temperature

Pei‐Cheng Hsu, Yu‐Sheng Chen, Yeukuang Hwu, J. H. Je, more

Journal of Synchrotron Radiation > 22 > 6 > 1524 - 1527

X‐ray irradiation is shown to trigger the deposition of Cu from solution, at room temperature, on a wide variety of insulating substrates: glass, passivated Si, TiN/Ti/SiO₂/Si and photoresists like PMMA and SU‐8. The process is suitable for patterning and the products can be used as seeds for electroplating of thicker overlayers.

chapter

The Venice “Archivio Di Stato”: innovating digitization with x-ray tomography

F. Albertin, E. Peccenini, Y. Hwu, Tsung-Tse Lee, more

2015 Digital Heritage > 1 > 5 - 10

2015 Digital Heritage

We present x-ray imaging results for diverse iron-based-ink antique writings - single-page manuscripts, stacks and scrolls - from the 16th century on. The objective is to elaborate new digitization techniques by x-ray tomography for the “Venice Time Machine” (VTM) project in collaboration with the “Archivio di Stato”. The technique can potentially read unopened - perhaps unopenable - documents and...

article

Crack-Tip Stress Field of Cracked Pipe under Combined Tension and Thermal Load

J.-H. Je, H.-S. Lee, D.-J. Kim, Y.-J. Kim

Procedia Engineering > 2015 > 130 > Complete > 1686-1694

In the presence of excessive plasticity, the fracture toughness depends on the size and geometry. For material under fully yielded conditions, the stresses near the crack tip are not unique, but depend on geometry. So Single-parameter; J-approach is limited to high-constraint crack geometry. J-Q theory has been proposed in order to decide crack geometry constraint. This approach assumes that the crack-tip...

article

The Antioxidative Effect of Heat‐Shock Protein 70 in Dendritic Cells

J. H. Je, D. Y. Kim, H. J. Roh, C. Pak, more

Scandinavian Journal of Immunology > 78 > 3 > 238 - 247

Reactive oxygen species (ROS) are produced by dendritic cells (DCs) during antigen presentation in contact hypersensitivity (CHS). ROS cause a number of non‐enzymatic protein modifications, such as carbonylation. Carbonylated proteins in DCs in response to hapten have not been fully identified yet. To identify the proteins carbonylated by ROS, murine epidermis‐derived DC line XS106 was challenged...

article

Erratum to: Detecting small lung tumors in mouse models by refractive-index microradiology

Chia-Chi Chien, Guilin Zhang, Yeukuang Hwu, Ping Liu, more

Analytical and Bioanalytical Chemistry > 2011 > 401 > 3 > 1087-1087

The online version of the original article can be found at http://dx.doi.org/10.1007/s00216-011-5117-x .

article

Detecting small lung tumors in mouse models by refractive-index microradiology

Chia-Chi Chien, Guilin Zhang, Y. Hwu, Ping Liu, more

Analytical and Bioanalytical Chemistry > 2011 > 401 > 3 > 827-835

Refractive-index (phase-contrast) radiology was able to detect lung tumors less than 1 mm in live mice. Significant micromorphology differences were observed in the microradiographs between normal, inflamed, and lung cancer tissues. This was made possible by the high phase contrast and by the fast image taking that reduces the motion blur. The detection of cancer and inflammation areas by phase contrast...

article

Growth mode in strained ZnO films on Al₂O₃(0001) during sputtering

I. W. Kim, H. S. Kim, S. J. Doh, J. H. Je, more

Journal of Electroceramics > 2006 > 17 > 2-4 > 327-330

We investigated the temperature dependence of growth mode in highly mismatched sputter-grown ZnO/Al₂O₃(0001) heteroepitaxial films using real-time synchrotron X-ray scattering. We find that the growth mode changes from 2 dimensional (2D) layer to 3D island in early growth stage with temperature (300^∘C–500^∘C). At around 400^∘C, however, intermediate 2D platelets nucleate in early stage, act as nucleation...