ANALYST
·
2016
·Vol. 141
·期 20
·5864-5869
·
IF 4.033
Ningning Zhou,Guowen Meng,Zhulin Huang,Yan Ke,Qitao Zhou,Xiaoye Hu
This report presents a simple and inexpensive fabrication approach to a flexible transparent composite film as a “cut-and-paste” surface-enhanced Raman scattering (SERS) substrate for in situ detection of organic pollutants. First, a self-assembled monolayer of Ag-nanocubes (Ag-NCs) is obtained at the air/water interface. Then, the Ag-NC monolayer is retrieved onto a flexible transparent polyethylene (PE) film to achieve an Ag-NC@PE composite film as a flexible SERS substrate. As the Ag-NCs in the monolayer are closely and uniformly packed on the PE film, the Ag-NC@PE composite film shows high SERS-activity with good signal homogeneity and reproducibility. Furthermore, the flexible transparent Ag-NC@PE composite film is “cut into” small pieces and directly “pasted” onto contaminated fruits for in situ SERS detection, as a result 10 nM thiram, 1 μM 4-polychlorinated biphenyl and 10 nM methyl parathion contaminants on oranges are detected, respectively. Therefore the Ag-NC@PE composite film is an inexpensive and effective SERS substrate for rapid in situ detection of organic pollutants in aqueous solutions, on fruits and other solid objects.
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Le Zhang,Enlin Han,Yulun Wu,Xiaodong Wang,Dezhen Wu
The surface decoration of short-cut polyimide (PI) fibers with multi-walled carbon nanotubes (MWCNTs) was performed by fabricating a polydopamine (PDA) coating layer on the fiber surface and then immobilizing MWCNTs onto the coating layer via covalent bonding. This successful surface decoration was confirmed by scanning electron microscopy, X -ray photoelectron spectroscopy, Fourier -transform infrared microscopy and static water contact angle. The application of the surface-decorated PI fibers as reinforcing fibers for reinforcement of polycarbonate (PC)/acrylonitrile–butadiene–styrene copolymer (ABS) alloy was investigated, which indicated that the MWCNTs-decorated PI fibers not only could effectively reinforce the PC/ABS alloy but also generated a significant lightweighting effect on the resulting composites. The maximum mechanical properties were achieved for the composites at a fiber content of 20 wt.% and a fiber length of 3 mm. This significant reinforcement effect is attributed to the enhancement of interaction bonding strength between the fibers and matrix as a result of the surface decoration of PI fibers with MWCNTs. The morphological investigation suggested that fiber rupture was the major energy dissipation mechanism in the tensile and impact failures, whereas fiber debonding and pullout were partly involved in the fracture energy dissipation. In addition, the presence of surface-decorated PI fibers slightly enhanced the thermal stability and load bearing capability of composites. This work can provide a type of high-performance lightweight composite material for automobile and aviation industries.
研究领域:
材料科学
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复合材料工程
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Longwei Jiang,Fenghui Wang,Xinyan Xie,Cancan Xie,Anqi Li,Ning Xia,Xue Gong,Huajiang Zhang
The aim of this work was to develop active packaging film by using chitosan/guar gum (CG) film matrix and walnut green husk extract (WE), for preservation of fresh-cut apple. WE was used as cross-linking agent to improve physicochemical properties, and as active substances to enhance antioxidant activity of CG films. Fourier transform infrared spectroscopy and scanning electron microscopy results showed WE formed intermolecular hydrogen bond interactions with the film matrix, and microstructures of the film were more compact. With the increase of WE content (0–4 wt%), the mechanical properties of composite films were significantly enhanced, while permeability of water vapor and oxygen was significantly decreased ( p < 0.05). When the amount of extract reached 4 wt%, the DPPH radical scavenging activity of composite film was significantly increased to 94.59%. CG-WE and CG films were used as active packaging materials to preserve fresh-cut apple. When stored at 4 °C for 10 days, CG-WE films showed better performance in reducing firmness, weight loss, total soluble solids and inhibiting browning and microbial growth of fresh-cut apples. Therefore, as a new type of active food packaging material, CG-WE films have good physical properties, and great potential in ensuring food quality and extending shelf life.
研究领域:
食品科学
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材料科学
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Jianfu Chen,Meixia Zheng,Kok Bing Tan,Junyan Lin,Meichun Chen,Yujing Zhu
The aim of this work was to develop an edible packaging material with good performance that can be used for fresh-cut vegetables preservation. The xanthan (XG)-hydroxypropyl methylcellulose (HPMC)-tea polyphenols (TP) composite film (XHT) was prepared by adding TP to the composite film-forming solution of XG and HPMC. At optimum TP dosage of 6% (XHT6), the tensile strength and elongation at break were at the maximum. The antioxidant activity and antibacterial properties were also enhanced, demonstrated good inhibitory ability to Staphylococcus aureus . After 8 days, the amount of Vitamin C that was retained by XHT6 was 127.81% and 7.83% higher than unpackaged and XHT0, respectively. Additionally, the MDA content in green peppers were 39.16% and 78.87% higher than that of unpackaged and XHT0, respectively. Practical applications of XHT films in preserving fresh-cut bell peppers had also shown positive results, making it possible as potential food packaging.
研究领域:
食品科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Lijuan Zhu,Wanfeng Hu,Ayesha Murtaza,Aamir Iqbal,Mengjie Kong,Jiao Zhang,Jiaxing Li,Xiaoyun Xu,Siyi Pan
Fresh-cut Chinese water chestnut (CWC) was treated with high pressure CO 2 (HPCD) to inhibit the browning reactions, and the underlying mechanism was investigated in this study. Results showed that HPCD at 2 MPa pressure significantly inhibited lipoxygenase activity and enhanced superoxide dismutase activity, leading to decreased malondialdehyde and H 2 O 2 contents in surface tissue. Moreover, HPCD could reduce total phenols/flavonoids content of surface tissue. Compare with control, homoeriodictyol, hesperetin, and isorhamnetin contents of 2 MPa HPCD-treated samples on day 10 were reduced by 95.72%, 94.31%, and 94.02%, respectively. Furthermore, HPCD treatment enhanced antioxidant enzyme activities, and improved the O 2 – scavenging ability and reducing power of inner tissue. In conclusion, by regulating ROS and membrane lipid metabolism, HPCD treatment with appropriate pressure could retard the biosynthesis of flavonoids and enzymatic oxidation of phenolic compounds in surface tissue, and enhance antioxidant activity of inner tissue, thereby, delaying the quality deterioration of fresh-cut CWC.
研究领域:
食品科学
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植物生理学
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采后技术
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Hesheng Wang,Yaqian Yang,Silong Jia,Jinchang Tong,Ziyu Jing,Yaxuan Cui,Xi Lv,Baoguo Ji,Shaoying Zhang,Youwei Yu
Sesamol-WPI interaction elucidated to construct stable WPI/Sesamol/PC nanoparticles. • WSP@NPs were developed by pH-driven electrostatic self-assembly. • Hydrogen bonding and electrostatic interactions formed between NPs and GC matrix • WSP@NPs improved the physicochemical and release performance of GC films. pH-driven electrostatic self-assembly was used to fabricate sesamol-loaded whey protein isolate/pectin (WPI) nanoparticles, which were incorporated into gelatin/chitosan (GC) films to improve their gas barrier and antioxidant properties for fruit preservation. The highest encapsulation efficiency (77.1%) was obtained at a WPI-to-sesamol ratio of 10:1. SEM, AFM, FTIR, XRD and TGA indicated enhanced intermolecular interactions after nanoparticle incorporation. Consequently, the nanocomposite films exhibited higher tensile strength (14.3 ± 1.86 MPa), improved UV-blocking performance (65.5% for UVA and 96.4% for UVB), as well as enhanced thermal stability and water resistance. The nanoparticle system effectively retarded sesamol release, resulting in elevated antioxidant activity (DPPH: 78.6 ± 2.4%; ABTS: 84.1 ± 1.4%). Application to fresh-cut apples and bananas demonstrated that GC + 10%NPs films significantly delayed quality deterioration by reducing color change, weight loss, enzymatic browning, and firmness loss. Overall, the biodegradable nanocomposite films show strong potential for sustainable active food packaging.
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DOI
高影响因子
Horticulturae
·
2026
·Vol. 12
·期 4
·430
·
IF 3.4
Hongli Li,Dandan Huang,Chengkun Li
The storage quality of fresh-cut peach fruit is compromised by weight loss and chromatic aberration. In this experiment, taurine at 30 mg L−1was applied to fresh-cut peaches to evaluate its effect on storage quality. Changes in weight loss, chromatic aberration, antioxidant system, endogenous nitric oxide (NO) metabolism, endogenous hydrogen sulfide (H2S) metabolism, and phenylpropanoid metabolism were studied. The results indicated that 30 mg L−1taurine effectively improved the ability to scavenge ROS, including •OH, O2•−, MDA, and H2O2, by inhibiting the decrease in the activities of SOD and CAT, enhancing POD activity, reducing PPO activity, and maintaining the AsA-GSH cycle. Moreover, taurine treatment increased the activities of 4CL and PAL and retarded the decrease in the activities of SKDH and C4H, thereby improving the accumulation of total phenols, flavonoids, and lignin. These findings showed that taurine mitigated oxidative damage in fresh-cut peaches by enhancing the antioxidant defense system. Exogenous taurine consistently enhanced NOS-like activity while decreasing NR activity in the early storage phase, and elevated the contents of L-Arginine, nitrite, and endogenous NO. Taurine treatment up-regulated the activities of SAT, L-CD, and OAS-TL, thus promoting endogenous H2S content in fresh-cut peaches. Taurine alleviated weight loss and chromatic aberration in fresh-cut peaches during storage by enhancing the antioxidant system and modulating NO, H2S and phenylpropanoid metabolism.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Wenjun Li,Xingying Xue,Ran Tao,Qin He,Hongxia Chen,Hao Zhou,Guliang Yang,Zhiwen Qi,Chengzhang Wang
In this study, urushiol (U1) and its antiseptics (U2, U3)-functionalized silver-coated nanoscale zero-valent iron composites (Ag@ZVI NPs1–3) were synthesized through metal coordination-driven assembly. The optimized NPs demonstrated significant antioxidant capacity, exhibiting IC 50 values of 18.28 ± 0.75 μg/mL (DPPH) and 15.62 ± 0.22 μg/mL (ABTS), alongside broad-spectrum antibacterial activity with MIC values ranging from 3.27 to 7.26 μg/mL. Subsequent incorporation of 2 wt% NPs3 into polylactic acid (PLA) matrices yielded nanocomposite films (2%NPs3/PLA) with enhanced physicochemical properties, including improved thermal stability (melting enthalpy ΔHm = 31.6 J·g −1 ), superior mechanical strength (tensile strength 71.0 MPa, elongation at break 13.4 %), and controlled hydrophilicity (water vapor permeability 0.26 ± 0.14 g·mm·m −2 ·h −1 ·kPa −1 , doubling PLA's baseline performance). The composite films exhibited dual functional efficacy, demonstrating sustained radical scavenging capacity (56.29 ± 1.26 % DPPH, 57.26 ± 2.28 % ABTS) and Fenton reaction-mediated bactericidal activity (99 % bacterial inactivation within 60 min via H₂O₂-catalyzed hydroxyl radical generation). The 2%NPs3/PLA nanocomposite showed remarkable biocompatibility (>97 % LO2 cell viability) and significantly improved the preservation of fresh-cut apples, outperforming commercial polyethylene films. This shelf-life extension is attributed to the synergistic antioxidant and antimicrobial effects, which likely contribute to the maintenance of key quality parameters.
研究领域:
食品科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Lihong Lin,Xianrui Chen,Wanxin Hong,Di Zhang,Xinyan Wen,Nitong Bu,Chengrong Wen,Ruojun Mu,Lin Wang,Jie Pang
It is still a challenge to use a fast and efficient method for preserving fresh-cut fruits from browning. To address this problem, we developed konjac glucomannan (KGM) incorporated with elderberry anthocyanins (EA) to form film-forming solution (KEA) combined with polyvinylpyrrolidone (PVP) solution to produce KEA/PVP fiber films by microfluidic blow spinning (MBS). The introduction of PVP and EA improved the spinnability and function properties of KGM-based fiber film, respectively. The fiber diameter of KEA/PVP films was increased with the addition of KEA. The FT-IR and XRD results verified that hydrogen bonds formed among KGM, EA, and PVP, contributing to the enhanced thermal stability, water barrier (WCA: 65°), and mechanical properties (TS: 2.73 MPa) of KEA/PVP films. The KEA/PVP films exhibited excellent antioxidant properties with DPPH and ABTS free radical scavenging rates of 74.69 % and 96.18 %, respectively. Besides, the antibacterial ability of KEA/PVP films against Escherichia coli and Staphylococcus aureus was also enhanced. The fresh-cut apple was effectively preserved that packaged in the KEA/PVP films and exhibited the best preservation effect compared with other groups. This work expanded the application of MBS and natural active compounds incorporated into KGM-based fiber film for fresh-cut apple preservation.
研究领域:
食品科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Yang Liu,Yan Zhang,Xiaofang Lv,Yisong Yu,Shuang Ren,Qianli Ma,Chuanshuo Wang,Shidong Zhou,Bingcai Sun
As oil and gas extraction increasingly ventures into deep-sea environments, the issues surrounding the flow safety of hydrate and wax deposits have become more critical. There is an urgent need to develop environmentally friendly and adaptable hydrate anti-agglomerants, and to expand the database and knowledge base for risk management strategies to ensure optimal production safety. This study formulated combined anti-agglomerants with varying HLB values using Span 80 and Tween 80 in different ratios. Rheological experiments were conducted to investigate their synergistic anti-agglomeration performance in water-in-oil emulsions and their adaptability in environments with wax, varying water contents, and different continuous phase compositions. The results indicate that, in comparison to a single anti-agglomerant, the combined anti-agglomerants not only increases the critical time for hydrate formation but also reduces peak viscosity and stable viscosity by 23–90 % and 25–85 %, respectively. Additionally, an index for assessing the flow risk of hydrate slurries under specific conditions was proposed, which demonstrates that the combined anti-agglomerant with an HLB value of 8.6 exhibits exceptional performance across various conditions. This finding is significant for refining risk management strategies for hydrates in deep-sea oil and gas transportation processes.
研究领域:
石油工程
·
化学工程
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产品关联
DOI
高影响因子
Coatings
·
2019
·Vol. 9
·期 9
·583
·
IF 2.33
Qiannan Wang,Hongliang Yu,Bo Tian,Bin Jiang,Jing Xu,Dongmei Li,Zhibiao Feng,Chunhong Liu
The composition and properties of edible coatings (ECs) will significantly influence their effects of food preservation. For the first time, whey protein isolates nanofibers (WPNFs), as a novel material with high hydrophobicity and antioxidant activity, combined with carvacrol (CA) as an antimicrobial agent and glycerol (Gly) as a plasticizer, was used to prepare edible coating (WPNFs-CA/Gly) for preserving fresh-cut Cheddar cheese. The prepared WPNFs and ECs emulsions have been investigated with transmission electron microscopy. Furthermore, the antioxidant activity of ECs emulsions, antimicrobial activity of edible films, and the physical properties of edible films, such as micromorphology, thickness, transparency, and moisture content, have also been evaluated. The weight losses and physical characteristics of both coated and uncoated fresh-cut Cheddar cheese samples have been assessed during storage. The DPPH free radical scavenging rate of WPNFs-CA/Gly emulsion was up to 67.89% and the reducing power was 0.821, which was higher than that of WPI-CA/Gly emulsions. The antimicrobial activity of WPNFs-CA/Gly films was nearly 2.0-fold higher than that of WPNFs/Gly films for the presence of CA. The WPNFs-CA/Gly films had smooth and continuous surfaces, and the transparency reached 49.7% and the moisture content was 26.0%, which was better than that of WPI-CA/Gly films. Furthermore, Cheddar cheese with WPNFs-CA/Gly coatings has shown lower weight losses (15.23%) and better textural properties than those uncoated samples. This in-depth study has provided a valuable and noteworthy approach about the novel edible coating material.Keywords:edible coating;whey protein isolate nanofibrils;antimicrobial activity;antioxidant activity;fresh-cut Cheddar cheese
研究领域:
食品科学
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生物材料学
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DOI
高影响因子
Food Chemistry-X
·
2022
·
IF 6.443
Lijuan Zhu,Wanfeng Hu,Ayesha Murtaza,Aamir Iqbal,Jiaxing Li,Jiao Zhang,Junjie Li,Mengjie Kong,Xiaoyun Xu,Siyi Pan
The potential mechanism behind the browning inhibition in fresh-cut water chestnuts (FWC) after eugenol (EUG) treatment was investigated by comparing the difference in browning behavior between surface and inner tissues. EUG treatment was found to inactivate browning-related enzymes and reduce phenolic contents in surface tissue. Molecular docking further confirmed the hydrophobic interactions and hydrogen bonding between EUG and phenylalanine ammonia-lyase (PAL). Moreover, EUG also enhanced reactive oxygen species (ROS)-scavenging enzyme activities, ultimately decreasing the O 2 - generation rates. Regarding inner tissue, EUG induced the accumulation of colorless phenolic compounds and increased the antioxidant capacity. In conclusion, 1.5 % EUG exhibited the best inhibitory effect on FWC browning, which partly attribute to the direct inhibitory effects on PAL activity. Furthermore, EUG could also enhance the enzymatic/non-enzymatic antioxidant capacity and alleviate the ROS damage to membranes, thereby, preventing the contact between oxidative enzymes and phenols and indirectly inhibiting the enzymatic browning in FWC.
研究领域:
食品科学
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植物生理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）