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719 results on '"Jang, Ji Hyun"'

9. Surgical margin status in relation to surgical approach in the management of early-stage cervical Cancer: A Canadian cervical Cancer collaborative (4C) study

Author

Piedimonte, Sabrina, Helpman, Limor, Pond, Gregory, Nelson, Gregg, Kwon, Janice, Altman, Alon, Feigenberg, Tomer, Elit, Laurie, Lau, Susie, Sabourin, Jeanelle, Samouelian, Vanessa, Willows, Karla, Aubrey, Christa, Jang, Ji-Hyun, Teo-Fortin, Ly-Ann, Cockburn, Norah, Saunders, Nora-Beth, Shamiya, Sarah, Vicus, Danielle, and Plante, Marie

Published
2023
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16. Insight on Strain Relaxation Effect in Perovskites for High‐Temperature Hydrogen Oxidation Reaction.

Author

Kim, Hyunmin, Lim, Chaesung, Gu, Jiamin, Jeong, Hu Young, Han, Jeong Woo, Jang, Ji‐Hyun, and Bu, Yunfei

Subjects
CHEMICAL kinetics, HYDROGEN oxidation, OXIDATION kinetics, NANOPARTICLE size, DENSITY functional theory
Abstract

The size of in situ exsolved nanoparticles (NPs) significantly affects the electrochemical and electro‐catalytic properties of oxide supports. Unfortunately, the instrumental factor affecting the exsolved NP size in poly‐crystalline perovskite oxides is still unexplored. Herein, the inherent micro‐strain (ε) value as an unprecedented factor in controlling the exsolved NP size of Pr0.5Ba0.5‐xSrxFe0.85Ni0.15O3‐δ (x = 0.3, 0.4, and 0.5) is introduced, wherein smaller NP size is successfully obtained via strain relaxation strategy. The effect of exsolved NP size on the fuel oxidation reaction kinetics at high‐temperature regimes is evaluated in‐depth by using density functional theory (DFT) calculations. In accordance with the insights provided by DFT calculations, the electro‐catalyst featuring the smallest Fe3Ni NP size via strain relaxation strategy demonstrates exceptional electrochemical performance along with robust durability toward high‐temperature hydrogen oxidation reaction. This work presents scientific guidance for tailoring the exsolved NP size in perovskites, thereby paving the way for designing rational perovskite electro‐catalysts in various energy‐related applications. [ABSTRACT FROM AUTHOR]

Published
2024
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17. Improvement of physical properties of calcium phosphate cement by elastin-like polypeptide supplementation.

Author

Jang, Ji-Hyun, Shin, Sumi, Kim, Hyun-Jung, Jeong, Jinyoung, Jin, Hyo-Eon, Desai, Malav S, Lee, Seung-Wuk, and Kim, Sun-Young

Subjects
Humans, Calcium Phosphates, Elastin, Bone Cements, Peptides, Biocompatible Materials, Dental Cements, Microscopy, Electron, Scanning, X-Ray Diffraction, Materials Testing, Hardness, Physical Phenomena, Biochemistry and Cell Biology, Other Physical Sciences
Abstract

Calcium phosphate cements (CPCs) are synthetic bioactive cements widely used as hard tissue substitutes. Critical limitations of use include their poor mechanical properties and poor anti-washout behaviour. To address those limitations, we combined CPC with genetically engineered elastin-like polypeptides (ELPs). We investigated the effect of the ELPs on the physical properties and biocompatibility of CPC by testing ELP/CPC composites with various liquid/powder ratios. Our results show that the addition of ELPs improved the mechanical properties of the CPC, including the microhardness, compressive strength, and washout resistance. The biocompatibility of ELP/CPC composites was also comparable to that of the CPC alone. However, supplementing CPC with ELPs functionalized with octaglutamate as a hydroxyapatite binding peptide increased the setting time of the cement. With further design and modification of our biomolecules and composites, our research will lead to products with diverse applications in biology and medicine.

Published
2018

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