Publications by authors named "Yunfei Xie"

Degradation pathways of the pesticide pyridaben in tea caused by ultraviolet photocatalytic degradation were identified using SERS and GC-MS. Pyridaben in tea decreased from 4.50 mg/kg to 3.

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Thiram is a readily synthesized, cost-effective antimicrobial agent widely used to control diseases in fruits and vegetables. Given the potential health hazards associated with thiram residues and advancements in detection methods, it is crucial to develop a rapid and sensitive technique for detecting these residues on fruit surfaces. Here, we prepared the Ag@filter paper (Ag@FP) surface-enhanced Raman scattering (SERS) substrate in a controlled manner and innovatively developed a capillarity-assisted SERS (CA-SERS) detection method.

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  • Diabetic periodontitis (DP) is a severe gum disease associated with diabetes that is not effectively treated by conventional methods, prompting exploration of the Kouqiangjie Formula (KQJF) as a potential alternative.
  • The study investigates KQJF's effects on bone activity and inflammation using animal models and cell cultures, focusing on a specific signaling pathway (miR-29a-3p-Dkk-1/Wnt/β-catenin).
  • Findings suggest that KQJF improves bone structure, reduces inflammation, and promotes cell survival in DP conditions by modulating key molecular pathways, indicating its promise as a therapeutic option for diabetes-related oral health issues.
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A highly sensitive immunoadsorption assay without traditional horseradish peroxidase for signal amplification was developed, utilizing a three-way DNA junction amplifier instead. The formation of a three-way DNA junction and release of trigger DNA with recycling was accomplished by toehold-mediated strand displacement. The fluorescent dye -methyl mesoporphyrin IX, with highly structure-specific binding affinity towards G-quadruplexes, was employed for label-free and simple signal output.

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  • Active packaging technologies are advancing to improve the preservation of fresh produce by preventing microbial contamination and managing internal packaging atmospheres.
  • This study presents MT film, a novel active fruit packaging made by enhancing a bionanocomposite film with CuO-doped titania nanotubes, which shows excellent mechanical strength and water resistance.
  • The MT film effectively inhibits microbial growth and regulates gas exchange, demonstrating significant reductions in bacterial and mold counts on blueberries, suggesting it could enhance food quality and extend shelf life while minimizing losses in the supply chain.
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A rapid, low-cost and reliable interfacial plasmonic nanoarray is presented as surface-enhanced Raman scattering (SERS) sensing platform for preliminary quantification and identification of flavonoids. Here, CTAB-modified Au colloidal nanoparticles self-assemble at the cyclohexane/acetone-water interface to form a uniform interfacial plasmonic nanoarray. The target hydrophobic analytes including organic dye methyl red and water-insoluble flavonoids, are effectively captured at the air-water interface and enter the "hot spots" between nanoparticles during the evaporation of the oil phase, which contributes to sensitive and reproducible SERS signals.

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Objective: This study aimed to investigate the effects of lipopolysaccharide (LPS)-pretreated primary periodontal ligament stem cell (PDLSC)-derived extracellular vesicles (EVs) (L-PDLSC-EVs) on periodontitis.

Materials And Methods: PDLSCs were obtained from mouse periodontal ligaments via enzymatic digestion. An in vitro inflammatory microenvironment for PDLSCs was established using LPS, and L-PDLSC-EVs were isolated through ultracentrifugation and identified.

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In this study, the laccase-mimicking enzyme MnO/Cu-BDC-His was synthesized by a facile procedure, and was applied in tetracycline antibiotics (TCs) identification and dye degradation. The MnO/Cu-BDC-His nanozymes effectively recognized phenolic hydroxyl groups in TCs and catalyzed the generation of colored oxidation products with different characteristic absorbance peaks at 350 nm, 525 nm and 600 nm. Different TCs mixtures produced different absorbance intensities at the above wavelengths and exhibited cross-color responses.

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  • Recent studies show that microplastics (MPs) are found in reproductive organs and may harm the reproductive system, but how they work is still not fully understood.
  • This study examines MP levels in cervical cancer patients to see how they change as the disease progresses, using metabolomics to analyze the cancer tissue's metabolic profile.
  • A total of 12 MP types were found, with polyethylene and polypropylene being the most common, and higher MP levels were linked to more advanced stages of cervical cancer, highlighting potential metabolomic changes that could provide insights into the disease's development.
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  • HIF-1α plays a crucial role in helping tissues adapt to low oxygen conditions and this study looks at its effects on blood vessel formation in specific surgical flaps used in rats.
  • The research involved 90 male Wistar rats divided into three groups, receiving different treatments after flap surgery to measure angiogenesis, using various testing methods including x-ray angiography and histological analysis.
  • Results indicated that the group treated with DMOG showed significantly increased blood vessel density and higher levels of HIF-1α and VEGF compared to the other groups, suggesting that HIF-1α enhances blood vessel growth and may improve tissue survival in these surgical procedures.
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Unlabelled: Porcine epidemic diarrhea (PED) has caused serious economic losses to the swine livestock industry. Due to the rapid variation in the PEDV) genome, especially the spike (S) protein, the cross-protection ability of antibodies between different vaccine strains is weakened. Hence, the rapid development of safe, broad-spectrum and highly effective attenuated PEDV vaccine still needs further research.

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Microplastics (MPs) are synthetic solid particles or polymer matrices that range in size from 1 μm to 5 mm. MPs are widely present in the global biosphere, leading to increasing concerns about their impact on human health. In this study, micro-Raman spectroscopy was used to evaluate the presence and characteristic of MPs in adenomyosis, ovarian ectopic cysts, and uterine tube tissue samples from 60 females.

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Electrochromic smart windows (ESWs) are an effective energy-saving technology for near-zero energy buildings. They consume electric energy unidirectionally during a round-trip coloring-bleaching process, with the energy involved in the bleaching process being wasted. It is highly desirable to reuse this wasted electric energy directly and/or transfer it into other energy storage equipment, further enhancing the overall efficiency of electric energy usage.

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Yam is a dual-purpose crop used in both medicine and food that is commonly used as a dietary supplement in food processing. Since yam proteins are often lost during the production of yam starch, elucidating the functionally active value of yam proteins is an important guideline for fully utilizing yam in industrial production processes. This study aimed to explore the potential protective effect of yam protein (YP) on cyclophosphamide (CTX)-induced immunosuppression in mice.

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  • Coronaviruses are a significant threat to global health, yet the structure and function of their nucleocapsid (N) proteins are not well understood, hindering antiviral research.
  • Researchers focused on the N-terminal domain (NNTD) of the feline infectious peritonitis virus (FIPV) and discovered that 3,6-dihydroxyflavone (3,6-DHF) acts as a strong inhibitor of the N protein.
  • The study shows that 3,6-DHF effectively inhibits FIPV replication, including in drug-resistant strains, highlighting its potential for developing new antiviral treatments against coronaviruses.
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  • Aggregation of bacteria, particularly MRSA, plays a significant role in biofilm formation, which poses major challenges for water safety due to antibiotic resistance.
  • The study focused on how MRSA cells aggregate under different conditions and evaluated a new disinfection method using micro-nano bubbles plasma-activated water (MPAW-US) to effectively inactivate these aggregated bacteria.
  • MPAW-US showed a stable inactivation rate and enhanced efficiency without promoting resistance or toxicity in MRSA, even improving wastewater treatment and agricultural sustainability efforts.
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Current analytical methods utilized for food safety inspection requires improvement in terms of their cost-efficiency, speed of detection, and ease of use. Sensor array technology has emerged as a food safety assessment method that applies multiple cross-reactive sensors to identify specific targets via pattern recognition. When the sensor arrays are fabricated with nanomaterials, the binding affinity of analytes to the sensors and the response of sensor arrays can be remarkably enhanced, thereby making the detection process more rapid, sensitive, and accurate.

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Microplastics (MPs) pollution has received widespread attention in recent years as the use of plastics continues to increase. However, currently no studies have reported the finding of MPs in human uterine fibroids (UFs) and myometrium tissues. In this study, UFs tissues (n = 48) and myometrium tissues (n = 40) from 48 patients and myometrium tissues (n = 8) from healthy population were collected.

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Plastic pollution at the nanoscale continues to pose adverse effects on environmental sustainability and human health. However, the detection of nanoplastics (NPLs) remains challenging due to limitations in methodology and instrumentation. Herein, a "green approach" for surface-enhanced Raman spectroscopy (SERS) was exploited to detect polystyrene nanospheres (PSNSs) in water, employing untreated filter paper and a simple syringe-filtration set-up.

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Background: Mycotoxin contamination of food has been gaining increasing attention. Hidden mycotoxins that interact with biological macromolecules in food could make the detection of mycotoxins less accurate, potentially leading to the underestimation of the total exposure risk. Interactions of the mycotoxins alternariol (AOH) and alternariol monomethyl ether (AME) with high-molecular glutenin were explored in this study.

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  • * MPs can accumulate and magnify in food chains, particularly when combined with OPs, which raises concerns about food safety and human health due to a lack of comprehensive data on their effects.
  • * The interaction of MPs with environmental factors like temperature and pH affects how pollutants adhere to surfaces, especially in fruits and vegetables, highlighting the need for more research on their impacts on food quality and safety.
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Microplastics (MPs) can enter the reproductive system and can be potentially harmful to human reproductive health. In this study, 13 types of microplastics (MPs) were identified in patient blood, cancer samples, and paracarcinoma samples using Raman spectroscopy, with polyethylene, polypropylene and polyethylene-co-polypropylene being the most abundant polymer types. Futher, cotton was also found in our study.

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A novel laccase mimic enzyme Cu-Mn with excellent photothermal properties was firstly prepared via a combination of hydrothermal and in situ synthesis. Cu-Mn nanozymes could catalyze the typical laccase substrate 2,4-dichlorophenol (2,4-DP) to generate the red quinone imine. Further, loading the MnO nanosheets with photothermal properties, Cu-Mn nanozymes possessed not only excellent laccase catalytic activity, but also high photothermal conversion efficiency.

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Biomimetic cytochrome P450 for chemical activation of environmental carcinogens is an efficient model for evaluating their mutagenicity and ultimately acquiring the metabolites that cannot be easily accessed by conventional routes of organic synthesis. Different kinds of mutagen derived from polyaromatic hydrocarbons (PAHs) by metalloporphyrin/oxidant model systems have been reported, but the underlying molecular mechanisms are poorly understood. Herein, we have for the first time demonstrated an effective surface-enhanced Raman scattering (SERS) protocol to study the dynamics and biomimetic metabolic behaviors of pyrene (Pyr) in the presence of various oxygen donors.

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Article Synopsis
  • * This study aims to create micro and nano-sized PP particles using a top-down approach to better mimic real environmental conditions.
  • * A new detection method using Raman spectroscopy was developed to analyze these PP particles, achieving a limit of detection for small PP sizes in food products like tea.
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