Search

Your search keyword '"Jo, Y.H."' showing total 43 results
Start Over Author "Jo, Y.H."
43 results on '"Jo, Y.H."'

7. Self-Consolidation Mechanism Of Porous Ti-6Al-4V Implant Prototypes Produced By Electro-Discharge-Sintering Of Spherical Ti-6Al-4V Powders

Author

Lee W.H., Jo Y.J., Kim Y.H., Jo Y.H., Seong J.G., Van Tyne C.J., and Chang S.Y.

Subjects
Ti-6Al-4V, implant, porous, sintering, electro-discharge, Mining engineering. Metallurgy, TN1-997, Materials of engineering and construction. Mechanics of materials, TA401-492
Abstract

Electro-Discharge-Sintering (EDS) was employed to fabricate Ti-6Al-4V porous implant prototypes from atomized powders (100 – 150 μm), that were subjected to discharges of 0.75 to 2.0 kJ/0.7g-powder from 150, 300, and 450 μF capacitors. Both fully porous and porous-surfaced Ti-6Al-4V compacts with various solid core sizes were self-consolidated in less than 86 – 155 μsec. It is known that EDS can simultaneously produce the pinch pressure to squeeze and deform powder particles and the heat to weld them together. The formation of a solid core in these prototypes depends on the amounts of both the pinch pressure and heat generated during a discharge. The size of the solid core and the thickness of the porous layer can be successfully controlled by manipulating the discharge conditions such as input energy and capacitance.

Published
2015
Full Text
View/download PDF

25. New Culture Medium Concepts for Cell Transplantation

Author

Lee, S., primary, Kim, B.Y., additional, Yeo, J.E., additional, Nemeno, J.G., additional, Jo, Y.H., additional, Yang, W., additional, Nam, B.M., additional, Namoto, S., additional, Tanaka, S., additional, Sato, M., additional, Lee, K.M., additional, Hwang, H.S., additional, and Lee, J.I., additional

Published
2013
Full Text
View/download PDF

38. Down-regulation of phospholipase D during differentiation of mouse F9 teratocarcinoma cells

Author

Min, D.S., Shin, K.S., Kim, E.G., Kim, S.R., Yoon, S.H., Kim, M.S., and Jo, Y.H.

Abstract

Phospholipase D has been recognized as playing an important role in signal transduction in many types of cells. We investigated the expression of phospholipase D during the differentiation of F9 embryonal teratocarcinoma cells. The ADP ribosylation factor-dependent phospholipase D activity, as measured by an in vitro assay, and H"2O"2-induced phospholipase D activity and phospholipase D protein content in whole cells were decreased during the differentiation of F9 cells induced by a combination of dibutyryl cyclic AMP and all-trans retinoic acid. In contrast, these changes were not observed when cells were induced by retinoic acid. These results suggest that down-regulation of phospholipase D protein is associated with differentiation of F9 cells to a parietal endoderm lineage.

Published
1999
Full Text
View/download PDF

43. Magnetoresistance and electron paramagnetic resonance study of La0.67-yYyBa0.33MnO3/LaAlO3 thin films

Author

Lee, K.W., Choi, J.-I., Kim, S.H., Lee, Cheol Eui, Jo, Y.H., and Lee, S.G.

Subjects
*GALVANOMAGNETIC effects, *MAGNETORESISTANCE, *TRANSITION temperature, *MAGNETIC resonance
Abstract

Magnetoresistive La0.67-yYyBa0.33MnO3/LaAlO3 thin films were prepared by the sol–gel spin-coating method. Our resistivity and the electron spin resonance (ESR) measurements indicate that the main factor determining the metal-insulator transition temperature Tm is the cation disorder represented by the cation radii variance σ2, and that ferromagnetic insulating regions coexist in the ferromagnetic metallic phase. In the paramagnetic phase, the dissociation energy of spin clusters and the polaron hopping energy obtained from the ESR intensity and linewidth also displayed a prominent dependence on σ2. Polaron localization due to Jahn–Teller distortions appears to be responsible simultaneously for the decrease in the ferromagnetic order and for the increase in the orbital order. [Copyright &y& Elsevier]

Published
2004
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results