INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY
·
2025
·
IF 5.2
Haiying Cui,Xingjun Chen,Tariq Aziz,Rania Ali El Hadi Mohamed,Fahad Al-Asmari,Jaza Maqbl Alshammari,Fakhria A. Al-Joufi,Ce Shi,Lin Lin
Salmonella Typhimurium ( S. Typhimurium ) is a major contributor responsible for food contamination and foodborne illnesses. In this study, the antibacterial activity of natural compound carvacrol (CAR) against S. Typhimurium were evaluated, and the combined inhibitory effects of CAR and blue light-405 nm (BL-405 nm) were also assessed for chicken meat preservation. CAR showed efficient antibacterial activity with a minimal inhibitory concentration (MIC) at 0.5 mg/mL. CAR at 2MIC significantly compromised bacterial membrane integrity, resulting in intracellular content leakage. The combined effect of CAR and BL-405 nm achieved a remarkable 5.62 log CFU/mL reduction in S. Typhimurium viability. The antibacterial mechanism investigations demonstrated that BL-405 nm and CAR triggered the cell oxidative stress by producing highly reactive oxygen species, such as reactive hydroxyl radicals ( OH), leading to cellular destruction and ultimately resulting in cell death. In practical application test, CAR combined with BL-405 nm treatment effectively extended chicken meat shelf life by maintaining moisture content, stabilizing pH, preserving color and texture, and inhibiting microbial growth and lipid oxidation. The study provided novel insights into the antibacterial mechanisms of CAR combined with BL-405 nm against S. Typhimurium , which could offer a new strategy for extending the shelf life of poultry meat.
研究领域:
食品科学
·
微生物学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
TALANTA
·
2019
·
IF 4.916
Chengxin Wu,Yuanyuan Sun,Yuanhang Wang,Wenzhen Duan,Jiangyue Hu,Lei Zhou,Qiaosheng Pu
Diode lasers, especially 405 nm diode laser, as excitation sources offer new opportunities for laser-induced fluorescence (LIF) detection, but the lack of available derivatization reagents limits their widespread applications. Herein, a commercial fluorescent dye , 7-(diethylamino)coumarin-3-carboxylic acid (DEAC-C) was introduced as derivatization reagent and corresponding derivatization strategy for DEAC-C labeling sulfonamides was developed for 405 nm LIF detection. After systematic optimization, three sulfonamides including hydrochlorothiazide (HCTZ), chlorothiazide (CTZ) and chlortalidone (CTD) could be efficiently labeled by DEAC-C in the presence of cyanuric chloride and triethylamine (1.5%) in acetonitrile at 50 °C for 180 min. Based on the laboratory-built capillary electrophoresis-LIF system, a robust method was then proposed for the separation of DEAC-C labeled sulfonamides by micellar electrokinetic chromatography (MEKC) using the classic borax-SDS system. Under the optimized conditions, a baseline separation of three sulfonamides was achieved within 15 min, and the detection limits were determined to be 0.24, 0.29, and 0.23 nM for HCTZ, CTZ, and CTD, respectively. Furthermore, the developed MEKC-LIF method was validated using sulfonamide standards and spiked human urine sample and successfully applied for the analysis of three sulfonamides in complex pharmaceutical and physiological samples.
研究领域:
分析化学
·
药学
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DOI
高影响因子
JOURNAL OF FOOD SCIENCE
·
2025
·Vol. 90
·期 3
·e70167
·
IF 3.4
Chae-Yeon Woo,Gi-Hyeok Lee,Kyung-Jik Lim,Jun-Won Kang
The use of blue light within a range of 400–470 nm holds significant potential for sanitization purposes. However, due to an extended exposure duration needed for an antibacterial effect, the utilization of a photosensitizer (PS) to increase the efficacy of the treatment becomes essential. This study investigated prospective use of onion peel extract as a PS in combination with 405 nm blue light for the inactivation of Salmonella Typhimurium, a common foodborne pathogen on eggs. Extracts were obtained using 99% ethanol, 50% ethanol, and distilled water (DW). Their photosensitizing activities were then compared. The combination of 405 nm blue light and onion peel extract using 99% ethanol reduced bacterial populations more effectively than blue light treatment alone, while also increasing reactive oxygen species generation, cell membrane permeability, lipid peroxidation, and DNA damage levels. However, the antimicrobial effect of the 99% ethanol extract did not show a concentration dependence. Spraying DW extract on eggshell treated with 99% ethanol onion peel extract at 1 mg/mL and blue light further enhanced Salmonella reduction. Liquid chromatography was conducted for component separation. However, none of the separated fractions exhibited a significant antibacterial effect, suggesting that the active compounds responsible for antibacterial activity might work synergistically in the crude extract rather than individually. In contrast, the crude extract exhibited a significant antibacterial effect, suggesting that 99% ethanol-extracted onion peel can serve as a PS, particularly in its crude state without purification, and effectively inactivate Salmonella on eggshells. Practical Application Antimicrobial blue light (aBL) in the range of 400–470 nm is a promising nonthermal technology with several advantages, including minimal impact on food quality and safety. This study optimized the concentration of onion peel extract to improve its effectiveness as a photosensitizer in aBL treatment against Salmonella Typhimurium on eggshells. These results may serve as a reference for further optimizing aBL treatments, offering a potentially sustainable and cost-effective photosensitizer for pathogen control.
研究领域:
食品安全
·
微生物学
·
食品科学
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产品关联
DOI
PubMed
高影响因子
IEEE ELECTRON DEVICE LETTERS
·
2023
·Vol. 44
·期 7
·1152-1155
·
IF 4.9
Weishuai Duan,Zhe Liu,Xinfa Zhu,Biao He,Chao Fan,Yonghui Zhang,Mengjun Wang,Hongxing Zheng,Erping Li
Near-ultraviolet (NUV) detectors based on two-dimensional (2D) materials have garnered considerable attention owing to their atomic-scale thickness, varied bandgap, and strong interaction with incident light. In this work, homostructures composed of tin disulfide/chromium–doped tin disulfide (SnS
2
/Cr–SnS
2
) were proposed for 405 nm near-ultraviolet detectors. Afterward, superlative detectors were fabricated through the employment of micro-mechanical exfoliation and polydimethylsiloxane-assisted dry-transfer methods, anchored by the SnS
2
Cr–SnS
2
homostructures. The detectors demonstrated exceptional detection performance for 405 nm NUV radiation with a significant responsivity of
$2.04\times 10^{{3}}\,\,\text {A}\cdot \text {W}^{-{1}}$
and a short response time of 8 ms, exceeding that of detectors based on most 2D materials and even commercial light detectors (Thorlabs FD11A–Si). The work presents an effective homostructure for high-performance SnS
2
-based detectors, thereby opening an opportunity for the utilization of SnS
2
in NUV detectors.
研究领域:
材料科学
·
光电子学
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DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 80
·77093-77099
·
IF 3.289
Guangxue Chen,Xiaoyuan Guan,Ruixin Xu,Junfei Tian,Fachuang Lu,Minghui He,Jianwen Yang
A series of thioxanthone dicarboxamide derivatives (TX-DCAs) containing hydrogen donors as one-component photoinitiators (PIs) have been prepared. In particular, the photoreactivity of these PIs was remarkably improved due to the covalent binding of the N-phthalimido derivative and type II chromophore thioxanthone. These derivatives exhibit interesting shifted absorption so that they can be utilized as versatile PIs upon exposure to various violet and visible LEDs (365 nm, 385 nm, 395 nm and 405 nm), and can efficiently actuate the free radical photopolymerization of acrylates.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Wenli Liu,Qizhi Yang,Yili Yang,Feiyue Xing,Pu Xiao
In the past decades, polymeric fluorescent materials with aggregation-induced emission (AIE) properties play important roles in the fields of biomedical and analytical chemistry, and the synthesis of well-defined polymers under mild conditions is in demand. In this report, narrowly distributed poly(methyl methacrylate)s (PMMAs) with AIE properties were prepared in mild conditions using 4-(1,2,2-triphenylvinyl)benzyl 2-bromo-2-phenylacetate (TPE-BPA), a novel initiator with an AIE-based functional group. This approach resulted in PMMAs with a fluorescent tag at the chain end (TPE-PMMA). Specifically, a high efficiency of initiation was observed using a low amount of air-stable copper(II) bromide/tris(2-pyridylmethyl)amine (CuIIBr2/TPMA) as a photocatalyst under the irradiation of LED@405 nm. Moreover, the TPE presented in the system did not affect the polymerization kinetics of MMA and the temporal control. The dispersities of the obtained PMMAs were as low as 1.12. Interestingly, TPE-PMMA with narrow dispersity was also obtained (Mw/Mn < 1.25) in the presence of air. Regarding the fluorescent properties of TPE-PMMAs, it was observed that their AIE intensities increased with the molecular weights. Moreover, they could also be used to probe the increased viscosity of the solution, indicating their potential of synthesizing functional sensors. The approach proposed in this work is convenient to prepare poly(methacrylate)s with well-defined structures in the presence of AIE-based fluorescent tags, and it thus paves a new way for the rational design of AIE-functionalized polymeric materials.
研究领域:
高分子化学
·
材料科学
·
分析化学
·
生物医学工程
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产品关联
DOI
高影响因子
LANGMUIR
·
2020
·
IF 3.557
Siyu Guo,Hu Liu,Haiyang He,Wei Wang,Lin Jiang,Xuhui Xiong,Li Wang
Long-chain zwitterionic ligands have been demonstrated to greatly improve the chemical durability of colloidal CsPbBr3 nanocrystals (NCs) by the chelate effect. However, Br sources are toxic, and the reaction is so dynamic that it is hard to control the size of the crystal. We propose an eco-friendly strategy to improve the chemical durability of colloidal CsPbBr3 NCs. Nontoxic, inexpensive, and directly available benzoyl bromine was used as the Br source, and tri-n-octylphosphine oxide was used as the adjuvant to control the reaction kinetics. Uniform, monodispersed NCs with a size of ∼11 nm were obtained. They had high photoluminescence quantum yields (PLQYs) of above 95% and, especially, showed strong stability against attack by polar solvents. The PLQY remained 80% even after 12 cycles of purification. Furthermore, after 24 h of continuous radiation by 405 nm laser, the photoluminescence (PL) intensity showed negligible decrease, and the wavelength and full width at half-maximum of PL had no significant change.
研究领域:
材料科学
·
纳米技术
·
化学
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DOI
高影响因子
DYES AND PIGMENTS
·
2024
·
IF 4.1
Weifeng Ma,Wei Jia,Yanjing Gao,Fang Sun
In this study, we designed and synthesized four α-ketone aryl thioesters photoinitiators ( PTEs ) with excellent cytocompatibility for LED photopolymerization using a simple one-step reaction. We investigated the potential photopolymerization initiation mechanisms of PTEs under 405 nm LED irradiation through ultraviolet–visible absorption spectroscopy, high-resolution mass spectroscopy, and electron spin resonance. Our findings revealed that PTEs can effectively initiate the photopolymerization of acrylate monomer tripropylene glycol diacrylate (TPGDA) under either 405 nm or 455 nm LED irradiation, achieving double bond conversions of approximately 80 % or higher after 180 s of irradiation. Remarkably, compared to the commercial photoinitiator 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO) and benzoyl methacrylate (MBF), PTEs exhibit certain advantage in initiating photopolymerization of triethylene glycol dimethacrylate (TEGDMA) widely used for dental materials under the irradiation of 405 nm. More importantly, MO-PTE has better cytocompatibility compared to TPO and exhibits a great potential in the fields of LED photopolymerization, biomaterials and food packaging.
研究领域:
材料科学
·
高分子化学
·
生物医学工程
·
牙科材料
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）