Publications by authors named "Doyeong Kim"

Anaplastic lymphoma kinase (ALK; also known as ALK tyrosine kinase receptor) inhibitors (ALKi) are effective in treating lung cancer patients with chromosomal rearrangement of ALK. However, continuous treatment with ALKis invariably leads to acquired resistance in cancer cells. In this study, we propose an efficient strategy to suppress ALKi resistance through a meta-analysis of transcriptome data from various cell models of acquired resistance to ALKis.

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  • The study aimed to create multilayer oil-in-water nanoemulsions using a layer-by-layer technique to improve the stability and antioxidant effects of β-carotene.
  • β-carotene was encapsulated in primary and secondary nanoemulsions, with various coatings leading to particle sizes of 92 to 110 nm and high entrapment efficiency (92-99%).
  • The multilayer emulsions showed improved bioaccessibility and antioxidant activity, significantly enhancing their effectiveness compared to the primary nanoemulsion.
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  • - The TP53 c.359A>G mutation creates a new splice site, disrupting normal p53 expression, but using an antisense morpholino oligomer (AMO) can fix this splicing issue, restoring normal levels of the p53 variant.
  • - The corrected p53 K120R protein is shown to have weakened ability to regulate the CDKN1A gene (which helps stop cell growth) but still promotes the BBC3 gene (which triggers cell death), indicating a partial retention of tumor suppressor functions.
  • - This research highlights the importance of acetylation at lysine 120 for p53's tumor-suppressing abilities and proposes that targeting mutant TP53 mRNA with AMO could be a
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The global spread of flaviviruses has triggered major outbreaks worldwide, significantly impacting public health, society, and economies. This has intensified research efforts to understand how flaviviruses interact with their hosts and manipulate the immune system, underscoring the need for advanced research tools. RNA-sequencing (RNA-seq) technologies have revolutionized our understanding of flavivirus infections by offering transcriptome analysis to dissect the intricate dynamics of virus-host interactions.

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Understanding protein structure and kinetics under physiological conditions is crucial for elucidating complex biological processes. While time-resolved (TR) techniques have advanced to track molecular actions, their practical application in biological reactions is often confined to reversible photoreactions within limited experimental parameters due to inefficient sample utilization and inflexibility of experimental setups. Here, we introduce serial X-ray liquidography (SXL), a technique that combines time-resolved X-ray liquidography with a fixed target of serially arranged microchambers.

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Metal-semiconductor interfaces are crucial components of optoelectronic and electrical devices, the performance of which hinges on intricate dynamics involving charge transport and mechanical interaction at the interface. Nevertheless, structural changes upon photoexcitation and subsequent carrier transportation at the interface, which crucially impact hot carrier stability and lifetime, remain elusive. To address this long-standing problem, they investigated the electron dynamics and resulting structural changes at the Au/TiO interface using ultrafast electron diffraction (UED).

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The structure of molecules, particularly the dynamic changes in structure, plays an essential role in understanding physical and chemical phenomena. Time-resolved (TR) scattering techniques serve as crucial experimental tools for studying structural dynamics, offering direct sensitivity to molecular structures through scattering signals. Over the past decade, the advent of x-ray free-electron lasers (XFELs) and mega-electron-volt ultrafast electron diffraction (MeV-UED) facilities has ushered TR scattering experiments into a new era, garnering significant attention.

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Molecular ions are ubiquitous and play pivotal roles in many reactions, particularly in the context of atmospheric and interstellar chemistry. However, their structures and conformational transitions, particularly in the gas phase, are less explored than those of neutral molecules owing to experimental difficulties. A case in point is the halonium ions, whose highly reactive nature and ring strain make them short-lived intermediates that are readily attacked even by weak nucleophiles and thus challenging to isolate or capture before they undergo further reaction.

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  • - This study analyzed the levels of harmful heavy metals (Pb, Cd, Hg, Me-Hg, and arsenic) in 1,186 samples of various Korean fishery products to understand their potential health risks.
  • - The quantification of these metals was achieved using advanced techniques like ICP-MS and DMA, showing reliable results that comply with recommended guidelines.
  • - Overall, the heavy metal concentrations found were lower than established safety standards, and the health risk evaluations indicated minimal risk for consumers in Korea, providing valuable data for food safety assessments.
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Here, we introduce a miniature beamline for transient absorption and dispersion spectroscopy, using a tailored deep ultraviolet field immediately after the noncollinear generation without subsequent optical elements. We explore the near-band-gap region in diamond in the presence of a few-femtosecond pump pulse where the delayed dynamical Franz-Keldysh effect and the almost instantaneous optical Kerr effect coexist.

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This study aims to develop a freshness indicator for fish products that changes color to indicate ammonia among volatile base compounds (TVB-N) generated during storage. Through an optimization experiment, we observed the indicator's color change relative to the ammonia concentration standard, finally selecting cresol red and bromocresol purple for the indicator mixture. In addition, eco-DEHCH and Breathron film were applied to the freshness indicator, considering environmental and economic values.

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Covalently linked dimers (CLDs) and their structural isomers have attracted much attention as potential materials for improving power conversion efficiencies through singlet fission (SF). Here, we designed and synthesized two covalently ortho-linked pyrene (Py) dimers, anti- and syn-1,2-di(pyrenyl)benzene (Anti-DPyB and Syn-DPyB, respectively), and investigated the effect of molecular configuration on SF dynamics using steady-state and time-resolved spectroscopies. Both Anti-DPyB and Syn-DPyB, which have different Py-stacking configurations, form excimers, which then relax to the correlated triplet pair ((TT)) state, indicating the occurrence of SF.

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The present study examined the effect of mucilage extracted from L. leaves on the emulsifying stability of bovine serum albumin (BSA)-stabilized oil-in-water (O/W) emulsions during the storage for seven days. O/W emulsions were prepared with a 90% aqueous phase containing mucilage (0-1.

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In the field of high-order harmonic generation from solids, the electron motion typically exceeds the edge of the first Brillouin zone. In conventional nonlinear optics, on the other hand, the excursion of band electrons is negligible. Here, we investigate the transition from conventional nonlinear optics to the regime where the crystal electrons begin to explore the first Brillouin zone.

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Background and Objectives: The relation of dietary n-6 fatty acid to metabolic syndrome has not been examined and clearly defined. To improve health in the general population, this study was to investigate the role of n-3 and n-6 fatty acids in the reduction in metabolic syndrome and to observe changes in the effects of these fatty acids depending on the level of insulin resistance. Materials and Methods: This cross-sectional study utilized national health and nutrition survey data from 2014 to 2016.

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  • This study focused on extracting mucilage from L. to explore its chemical makeup and functional properties, proposing potential uses across various industries.
  • The extraction method used was hot water, and analyses determined that the mucilage mainly consists of uronic acid, with notable solubility and water-holding capacities.
  • The research concluded that L. mucilage has promising applications as a hydrocolloid in food, cosmetic, and pharmaceutical industries due to its enhanced antioxidant activities and emulsion properties.
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This study analyzed four polycyclic aromatic hydrocarbons (PAHs) from frequently consumed home meal replacement (HMR) products in Korea and evaluated their chemical analysis methods. The PAHs investigated were benzo[a]anthracene, chrysene, benzo[b]fluoranthene and benzo[a]pyrene. Chrysene-d12 and benzo[a]pyrene-d12 served as internal standards.

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Antigen tests for SARS-CoV-2 diagnosis are simpler and faster than their molecular counterparts. Clinical validation of such tests is a prerequisite before their field applications. We developed and clinically evaluated an immunochromatographic immunoassay, GenBody™ COVAG025, for the rapid detection of SARS-CoV-2 nucleocapsid (NP) antigen in two different clinical studies.

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  • * High-performance liquid chromatography was used to measure the levels of PAHs, showing a significant decrease, especially with the highly carcinogenic benzo[]pyrene, which was not detected after treatment.
  • * The treatment did not adversely affect the quality of the sesame oil, indicating that cellulosic aerogel is an effective and eco-friendly option for reducing toxic contaminants in food products.
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There is a need for accurate diagnostic tests for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the cause of coronavirus disease (COVID-19). This study aimed to evaluate the diagnostic accuracy of an immunochromatography-based immunoglobulin G (IgG)/immunoglobulin M (IgM) antibody assay (GenBody™ COVI040) for detecting SARS-CoV-2 antibody seroconversion in COVID-19 patients. A total of 130 samples, serially collected from patients with confirmed COVID-19, and 100 negative control samples were tested for anti-SARS-CoV-2 IgM and IgG using the GenBody™ COVI040 assay following the South Korean Ministry of Food and Drug Safety guidelines on the review and approval of in vitro diagnostic devices for COVID-19.

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  • A validated method using high-performance liquid chromatography-fluorescence detection was developed to identify polycyclic aromatic hydrocarbons (PAHs) in e-liquids, e-gases, and smokeless cigarettes.
  • The method analyzed specific PAHs in 16 commercially available smoking cessation products, finding low PAH levels in most samples, but non-ignitable cigarettes had higher concentrations.
  • The results highlight the need for further analysis of potential hazardous substances in smoking cessation aids to ensure public health safety and inform regulatory practices.
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This study focuses on the development of a nanosupport based on halloysite nanotubes (HNTs), FeO nanoparticles (NPs), and thiolated chitosan (CTs) for laccase immobilization. First, HNTs were modified with FeO NPs (HNTs-FeO) by the coprecipitation method. Then, the HNTs-FeO surface was tuned with the CTs (HNTs-FeO-CTs) by a simple refluxing method.

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The evaluation and confirmation of healing properties of several plant species of genus based on their traditional uses and the clinical claims are of utmost importance. Genus has received more attention to assess and validate the therapeutic potential and clinical approval due to its immense folk medicinal and traditional applications. Various species of genus are used in the form of herbal medicine and formulations, in treatment of diseases, including headache, fever, pneumonia, flu, geriatric, cancer, to improve memory, abdominal and back pain, cough and cold, conjunctivitis, diarrhea, heart disorder, leprosy, sexually transmitted diseases, and urinary tract disorders.

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Grape pomace, a most abundant and renewable wine industry waste product was utilized as a suitable reducing, capping, and stabilizing biomolecules for green synthesis of silver nanoparticles (AgNPs). The physicochemical properties of biosynthesized grape pomace extract (GPE)-AgNPs were duly appraised via UV-Visible spectroscopy, X-ray diffractometer (XRD), Fourier-transform infrared spectroscopy (FTIR), and transmission electron microscopy. The analytical studies revealed that the GPE-AgNPs were well formed and stable in nature.

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Flock House virus (FHV), an insect RNA virus, has a bipartite genome. FHV RNA1 can be packaged in turnip yellow mosaic virus (TYMV) as long as the FHV RNA has a TYMV sequence at the 3'-end. The encapsidated FHV RNA1 has four additional nucleotides at the 5'- end.

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