A5008461939- Microwave Dielectric Ceramics Synthesis
- Ferroelectric and Piezoelectric Materials
- Dielectric properties of ceramics
- Acoustic Wave Resonator Technologies
- COVID-19 and healthcare impacts
- Semiconductor materials and devices
- Ecology and Conservation Studies
- Polysaccharides and Plant Cell Walls
- Electrohydrodynamics and Fluid Dynamics
- Electromagnetic wave absorption materials
- Advanced Cellulose Research Studies
- Thermal Regulation in Medicine
- biodegradable polymer synthesis and properties
- Acupuncture Treatment Research Studies
- Healthcare and Venom Research
- Polysaccharides Composition and Applications
- Infection Control and Ventilation
- Magnetic Properties and Synthesis of Ferrites
- Microplastics and Plastic Pollution
- Plasma Diagnostics and Applications
- Anesthesia and Sedative Agents
- COVID-19 Impact on Reproduction
- Electrospun Nanofibers in Biomedical Applications
- Healthcare Systems and Challenges
- Anesthesia and Pain Management
Yonsei University
2017-2023
Chonbuk National University Hospital
2023
Jeonbuk National University
2023
Daegu Fatima Hospital
2020
Seoul National University
2000-2006
Materials Science & Engineering
2000
Abstract The variation in the biological function of proteins plays an important role plasma medicine and sterilization. Several non-thermal sources with different feeding gases are used worldwide for treatment, including dielectric barrier discharge (DBD) atmospheric-pressure jet (APPJ) as most commonly sources. Therefore, present work, we both DBD APPJ N 2 air to evaluate effects on structural, thermodynamic, activity changes enzymes. In current lysozyme a model enzyme verified structural...
Single-phase paraelectric ZrTiO4 thin films were synthesized at various temperatures using direct-current magnetron reactive sputtering. The dielectric constants (ε) and losses (tan δ) of as-deposited annealed measured in the 100 kHz range a Pt upper electrode phosphorous-doped Si (100) bottom electrode. Data showed that as deposition temperature increased, decreased, while did not change much. Similar trends for observed after annealing 800 °C. These results correlated well with strains...
Mushroom chitin membranes with controllable pore structures were fabricated through a simple process naturally abundant Agaricus bisporus mushrooms. A freeze-thaw method was applied to alter the of membranes, which consist fibril clusters within glucan matrix. With tunable size and distribution, mushroom could effectively separate stable oil/water emulsions (dodecane, toluene, isooctane, chili oil) various chemical properties concentrations particle contaminants (carbon black microfibers)...
The dielectric properties of (Ba0.43Sr0.57)TiO3 (BST) thin films were investigated in the microwave-frequency range. losses (tan δ) and constants (ε) successfully measured up to ∼6 GHz using a circular-patch capacitor geometry. deposition temperatures varied from room temperature 750°C investigate effects crystallinity on properties. As film was enhanced, increased 0.0024±0.0018 at room-temperature 0.0102±0.0017 deposition. 10.29±0.02 243±1 same deposition-temperature Raman spectroscopy...
The microwave dielectric properties of the (Ba,Sr)TiO3 thin films annealed at various oxygen pressures ranging from 5to500mTorr were investigated over frequency range 0.5–5GHz using a circular-patch capacitor geometry. constant (ε) followed Curie–von Schweidler relaxation in microwave-frequency range, and degree corresponded qualitatively with measured loss (tanδ). As pressure varied, had maximum value ∼0.03 100mTorr, its behavior was correlated Raman strength polar modes.
With the increasing demand for filtering face pieces as daily personal protection, inevitable problems associated with filter wastes have been addressed. To mitigate this concern, an eco-friendly alternative material is developed using plant-sourced biomaterials, poly(lactic acid) (PLA) and fungal chitin. Heterogeneous electrospun fibers distinctive chitin-rich PLA-rich regions are formed by inducing phase separation between hydrophilic chitin hydrophobic PLA polymers. The...
The dielectric constants and losses of ZrTiO 4 thin films deposited by DC magnetron reactive sputtering were investigated. paraelectric properties measured in the 100 kHz range, compared with an equivalent circuit model. As deposition temperature increased (up to 600°C), (tan δ) decreased (down 0.017±0.007), while ( ε ) range 35±7. Post annealing at 800°C oxygen for 2 h reduced tan δ down 0.005±0.001, higher than those well-sintered bulk . systematic trend as a function post showed good...
Background: The coronavirus disease-19 (COVID-19) was first reported in Wuhan, China, with Korea being subsequently exposed. In Korea, COVID-19 screening guidelines have been established every hospital as an attempt to prevent its spread. There has a previous report of successful cesarean section confirmed mother; however, there remain no for suspected mothers. Cesarean is often urgently operated without sufficient infection evaluations. We would like suggest anesthetic management patients...
Rehabilitation of lower limb amputation in developing countries is quite challenging. Though there are basic to highly advanced prostheses available India, the set-up still facing difficulties countries. Prosthetic management difficult due lack availability and reduced affordability among low income populations. In this review we highlighted prosthetic rehabilitation status India. Currently, India advancing well field, but further studies required provide more evidence recommendation.
Coronavirus disease 2019 (COVID-19) has been an epidemic in the Republic of Korea since first patient who came China was confirmed as having on January 19, 2020. Therefore, surgery for COVID-19-related patients is expected to increase.We experienced two cases underwent femur fracture under general anesthesia. In one case, infection control prevent transmission achieved, while second healthcare workers were exposed severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2).In areas where...