Publications by authors named "Dokyun Kim"

Nonlinear autoregressive exogenous (NARX) neural network models were used to forecast the time-series profiles of anaerobic digestion-elutriated phase treatment (ADEPT). Experimental data from the operation of the pilot plant and lab-scale reactor were used for calibration, validation, and practice tests. Anaerobic digestion-elutriated phase treatment removed approximately 87% of volatile solids with a relatively brief hydraulic retention time of 7 days.

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Plant-derived nanovesicles (PDNVs) are becoming more popular as promising therapeutic tools owing to their diversity, cost-effectiveness, and biocompatibility with very low toxicity. Therefore, this review aims to discuss the methods for isolating and characterizing PDNVs and emphasize their versatile roles in direct therapeutic applications and drug delivery systems. Their ability to effectively encapsulate and deliver large nucleic acids, proteins, and small-molecule drugs was highlighted.

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Plant-derived exosome-like nanovesicles (PENVs) contain various biomolecules that can be used as delivery cargoes, such as small compounds, small interfering RNAs, DNAs, and recombinant proteins. Edible PENVs are nontoxic, useful for oral administration, and easily prepared in high amounts from a variety of plants, vegetables, and fruits. In this study, we evaluated whether PENVs can be used as delivery cargoes for recombinant vaccine antigens.

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Microstructure optimization and high-performance material development are crucial for improving the electrochemical performance of all-solid-state batteries (ASSBs). Researchers frequently record numerous micro-scale or nano-scale electron micrographs for unbiased post-mortem analysis, performance evaluation, and improvement of ASSBs. However, these micrographs are often underutilized and typically analyzed qualitatively without ensuring an accurate representation of the experimental objectives.

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This study aimed to investigate the bactericidal effect of naringenin (NG), a plant-derived flavonoid, and its synergistic effect with mild heat (MH) treatment at 50 °C in peptone water (PW) and ready-to-drink cold brew coffee (RDC). Among various NG concentrations (1-20 mM), 10 mM NG resulted in the greatest inactivation for Escherichia coli O157:H7, Salmonella Typhimurium, Listeria monocytogenes, and Staphylococcus aureus. In RDC, NG + MH treatment resulted in a 5-8-log reduction in all pathogens after 10 min, except for S.

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Objectives: To analyze the distribution of incompetent segments in the great saphenous vein (GSV) in Clinical, Etiological, Anatomical, Pathophysiological (CEAP) classification C2 limbs to provide a reference for appropriate diagnosis and treatment planning.

Methods: We analyzed the distributions of incompetent segments in the GSVs of the C2 lower extremity undergoing duplex ultrasound from September 2017 to December 2023. The examined segments were the saphenofemoral junction (SFJ), GSV at the proximal thigh, GSV at the knee, and GSV below the knee.

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Chlorogenic acid (CGA) is abundant in various plants and notably in coffee beans. This study investigated the bactericidal activity of CGA combined with ultraviolet-A light (UVA, 365 nm) (CGA + UVA) against Escherichia coli DH5α, with the aim of developing novel strategies for food preservation and healthcare. CGA + UVA treatment was superiorin reducing bacterial survival than either treatment alone.

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Microbial pathogens such as bacteria and fungi form biofilms, which represent substantial hurdles in treating human illness owing to their adaptive resistance mechanism to conventional antibiotics. Biofilm may cause persistent infection in a variety of bodily areas, including wounds, oral cavity, and vaginal canal. Using invasive devices such as implants and catheters contributes significantly to developing healthcare-associated infections because they offer an ideal surface for biofilm formation.

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A combined antibacterial effect of 405 nm blue LEDs (BL) and gelatin film (G) was investigated on stainless steel (SUS) and fresh fruit peel for the inactivation of Escherichia coli O157:H7 and Salmonella Typhimurium. On the SUS, the sum of the individual treatments of G for 20 min and BL at 20 J/cm was <1 log reduction (log CFU/cm). In comparison, combination treatment of G and BL (G + BL) at 20 J/cm exhibited 2.

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Metabolic dysfunction-associated fatty liver disease (MASLD), a persistent liver condition associated with metabolic syndrome, is primarily caused by excessive fructose intake and a typical Western diet. Because there is currently only one approved treatment, lifestyle and dietary interventions are crucial. This study assessed the effects of dietary intervention involving freeze-dried plum (FDP), a natural source of antioxidants containing diverse polyphenols.

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Novel antimicrobials are urgently needed to combat methicillin-resistant Staphylococcus aureus (MRSA) infections. This study explores the potential of biosurfactants derived from Bacillus rugosus HH2 as a novel antibacterial agent against MRSA. The biosurfactant, identified as surfactin, demonstrated surface-active properties, reducing surface tension to 37.

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Article Synopsis
  • Kaposi's sarcoma-associated herpesvirus (KSHV) is responsible for diseases like Kaposi's Sarcoma and has a high prevalence in sub-Saharan Africa, making vaccine development critical, but existing challenges include the absence of viable animal models for KSHV infection.
  • The study created a chimeric mouse virus (MHV68-K-K8.1) to mimic KSHV infection and tested two K8.1 vaccines (mRNA-LNP and Ferritin nanoparticles) which successfully stimulated immune responses in mice.
  • Results showed that mice vaccinated with K8.1 mRNA LNP vaccines had reduced viral levels and reactivation rates of the surrogate virus, indicating the potential effectiveness of these
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Since black-tailed gulls derive energy for egg production around their habitat, analyzing concentration of chemicals in the eggs reveals the local environmental pollution. This is, however, complex due to the diversity of seabird diets across multiple ecosystems. This study determined the influence of food source and trophic position (TP) on the mercury concentration ([Hg]) in eggs and subsequently mitigated these influences by adjusting through [Hg]-TP relationship, thereby enabling spatial and temporal comparisons among individuals.

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Urinary tract infections (UTIs) are pervasive and prevalent in both community and hospital settings. Recent trends in the changes of the causative microorganisms in these infections could affect the effectiveness of urinalysis (UA). We aimed to evaluate the predictive performance of UA for urinary culture test results according to the causative microorganisms.

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Article Synopsis
  • Non-alcoholic fatty liver disease (NAFLD) is characterized by excessive fat accumulation in the liver and is often linked to unhealthy diets, particularly the overconsumption of soft drinks and Western diets.
  • The study explores the efficacy of hemp sprout-derived exosome-like nanovesicles (HSNVs) in preventing liver fibrosis and gut permeability issues associated with NAFLD by administering these nanovesicles to mice on a high-fat diet.
  • Results showed that HSNVs significantly reduced oxidative stress and fibrosis markers in liver tissues, as well as improved gut barrier function, suggesting their potential as a protective treatment against liver damage caused by poor dietary habits.
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Background: The increasing incidence of antibiotic-associated diarrhoea (AAD) is a serious health care problem. Dysbiosis of the gut microbiota is suspected to play a role in the pathogenesis of AAD, but its impact on the clinical outcomes of patients remains unclear.

Methods: Between May and October 2022, 210 patients with AAD admitted to a university hospital and 100 healthy controls were recruited.

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Introduction: The rapid spread of COVID-19 worldwide within 2 months demonstrated the vulnerability of the world's population to infectious diseases. In 2015, the Global Antimicrobial Resistance and Use Surveillance System (GLASS) was launched to combat antimicrobial resistance (AMR). However, there has been no comprehensive assessment of the decade-long global battle against AMR based on GLASS data.

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For antinuclear antibody (ANA) screening, the gold standard method is an indirect immunofluorescence assay (IIFA) using HEp-2 cells, and a serial dilution test is needed to determine the endpoint titer. We aimed to evaluate the accuracy of the estimated endpoint titer (eEPT) by the NOVA View system, by comparing it with the EPT by the serial dilution method (dEPT). The endpoint titers of a total of 1518 ANA positive cases with five major patterns including speckled, homogeneous, centromere, nucleolar, and nuclear dots patterns were determined using both the estimation function and the serial dilution method by the NOVA View system.

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Introduction: Clonal hematopoiesis of indeterminate potential (CHIP) and dementia disproportionately burden patients with chronic kidney disease (CKD). The association between CHIP and cognitive impairment in CKD patients is unknown.

Methods: We conducted time-to-event analyses in up to 1452 older adults with CKD from the Chronic Renal Insufficiency Cohort who underwent CHIP gene sequencing.

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Background: This study analyzed the genetic traits and fitness costs of vancomycin-resistant Enterococcus faecium (VREfm) blood isolates carrying Tn1546-type transposons harboring the vanA operon.

Methods: All E. faecium blood isolates were collected from eight general hospitals in South Korea during one-year study period.

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Although zinc's involvement in bone calcification is well-established, its role in vascular calcification, characterized by abnormal calcium and phosphorus deposition in soft tissues and a key aspect of various vascular diseases, including atherosclerosis, remains unclear. This review focuses on zinc's action in vascular smooth muscle cell (VSMC) calcification, including the vascular calcification mechanism. Accumulated research has indicated that zinc deficiency induces calcification in VSMCs and the aorta, primarily through apoptosis accompanied by a downregulation of smooth muscle cell markers.

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Background: Healthcare 4.0. refers to the integration of advanced technologies, such as artificial intelligence (AI) and big data analysis, into the healthcare sector.

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Background: Clonal hematopoiesis of indeterminate potential (CHIP) is a common inflammatory condition of aging that causes myriad end-organ damage. We have recently shown associations for CHIP with acute kidney injury and with kidney function decline in the general population, with stronger associations for CHIP driven by mutations in genes other than (non- CHIP). Longitudinal kidney function endpoints in individuals with pre-existing chronic kidney disease (CKD) and CHIP have been examined in two previous studies, which reported conflicting findings and were limited by small sample sizes.

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Background: This study aimed to identify recent trends in the epidemiology of bloodstream infection (BSI)-causing microorganisms among patients with haematologic malignancies (HMs) between 2011 and 2021, and to determine their impact on patient outcomes.

Methods: This retrospective study included 6792 patients with HMs, of whom 1308 (19.3%) developed BSI within 1 y of diagnosis.

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