Publications by authors named "Sungeun Jo"

Acorn ( CARR.) has been used in traditional food and medicinal ethnopharmacology in Asia, and it has shown multifarious functions such as antidementia, antiobesity, and antiasthma functions. However, there is limited scientific evidence about the efficacy of acorn for ameliorating skin problems.

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Background: Luffa cylindrica stem sap (LuCS) has been ethnopharmacologically used as a cosmetic ingredients to improve the facial condition in Asians, but there is no scientific proof about the advantages of LuCS as a supplement for skin elasticity inducer.

Purpose: Presently, we have validated the beneficial effect of LuCS in human preadipocyte and fibroblast.

Methods: In vitro activities of LuCS on expression of cellular elastin and collagen type I were validated using Western blot analysis in human fibroblasts.

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Luffa cylindrica stem sap (LuCS) has been traditionally used as a facial cosmetic supplement to enhance the skin condition of Asians. However, LuCS has yet to be described and there is no solid scientific evidence regarding the use of LuCS as an anti-wrinkle agent. In the present study, we have evaluated the functional effect of LuCS and its underlying mechanisms based on scientific evidence.

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Understanding the relationship between the acceptor dopant size and proton conductivity in barium zirconate, BaZrO, is important for maximizing efficiency in this promising fuel cell material. While proton conduction pathways with larger Y and smaller Al defects have been explored, proton pathways with Sc , a defect of comparable size to the replaced ion, have not been investigated using centrality measures, periodic pathway searches, and kinetic Monte Carlo (KMC). Centrality measures in BaScZrO highlight a trapping region by Sc and scattered high centrality regions on undoped planes.

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Article Synopsis
  • A new flash LIDAR system is proposed that features high spatial resolution and precise range measurement.
  • The system includes a polarization modulating Pockels cell (PMPC) that alters polarization over time after emitting a laser pulse, and a micro-polarizer CCD camera (MCCD) that captures the returning pulse and its intensity.
  • The experimental results show a spatial resolution of 0.12 mrad and a range precision of 5.2 mm at a distance of 16 meters.
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Solar thermoelectric generators (STEGs), which are used for various applications, (particularly small size electronic devices), have optical concentration systems for high energy conversion efficiency. In this study, a refraction-assisted STEG (R-STEG) is designed based on phase-change materials. As the phase-change material (PCM) changes phase from solid to liquid, its refractive index and transmittance also change, resulting in changes in the refraction of the sunlight transmitted through it, and concentration of solar energy in the phase-change lens.

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Xylose is a major monosugar in cellulosic biomass and should be utilized for cost-effective ethanol production. In this study, xylose-converting ability of recombinant Saccharomyces cerevisiae SX6(MUT) expressing NADH-preferring xylose reductase mutant (R276H) and other xylose-metabolic enzymes, and deficient in aldehyde dehydrogenase 6 (Ald6p) were characterized at microaerobic conditions using various sugar mixtures. The reduction of air supply from 0.

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Induction coils were fabricated based on flexible printed circuit board for inductive transcutaneous power transmission. The coil had closed magnetic circuit (CMC) structure consisting of inner and outer magnetic core. The power transmission efficiency of the fabricated device was measured in the air and in vivo condition.

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