Gels
·
2026
·Vol. 12
·期 5
·381
·
IF 6.4
Jizhong Yuan,Yaohuang Jiang,Mengle Liu,Peipei Wu,Guoxian Feng,Yanchun Yu,Xiongfa Yang
UV-curable L(-)–borneol-functionalized antibacterial hydrogels for packaging fresh-cut banana and cherry tomato (UV-LBs) were designed from L(-)–borneol-functionalized polyurethane acrylate prepolymers (LB-PUAs) and thiol-functionalized PVA (PVA-SH) using a thiol-ene click reaction initiated by UV light. UV-LBs exhibit unique properties, including excellent thermal stability, high mechanical performance and quite high antibacterial efficiency. The initial thermal decomposition temperature (Td5), tensile strength and elongation at break are in the range of 225–240 °C, 1.38–2.05 MPa and 44.4–68.6%, respectively. The antibacterial efficiency of UV-LBs againstStaphylococcus aureus(S. aureus),Escherichia coli(E. coli), andMonilia albican(M. albican) can reach 67.4%, 75.6% and 83.7%, respectively. The storage time of packaged fresh-cut banana and cherry tomato can be extended from 12 h to 30 h and 4 d to 5 d, respectively.
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DOI
高影响因子
Journal of Food Measurement and Characterization
·
2025
·
IF 3.3
Zeng Liping,Yang Ruopeng,Deng Qiuhong,Hu Chunyuan,Tian Ruijin,Yang Guangming,Liu Sha,Fan Aiping
This study successfully prepared polylactic acid (PLA) composite films containing Litsea cubeba oil (LCO, 9 wt%) and different concentrations of nano-TiO 2 (0 wt%, 1 wt%, 2 wt%, and 3 wt%), and evaluated their efficacy in preserving fresh-cut jackfruit. The results showed that LCO and nano-TiO 2 could be successfully incorporated into the PLA matrix, which improved the composite films’ structure, flexibility, water and UV resistance, and antioxidant and antimicrobial activities. Notably, the composite film with 2 wt% nano-TiO 2 content exhibited the best overall performance among all the packaging materials. Experiments on fresh-cut jackfruit preservation revealed that the composite films suppressed the proliferation of microorganisms like total bacterial count, mold and yeast, and to varying degrees, inhibited their growth and slowed down the quality deterioration of fresh-cut jackfruit. In addition, composite film with 2 wt% nano-TiO 2 content was the most effective in inhibiting microorganisms, respiratory rate, enzyme activity, and malondialdehyde (MDA) content as well as in maintaining weight loss, color, firmness, flavor, and vitamin C (VC) content, ultimately extended the shelf-life of fresh-cut jackfruit from 6 to 15 days at 10 °C. This work demonstrates the feasibility of bioactive PLA films as safe antimicrobial packaging for tropical fruits.
研究领域:
食品科学与技术
·
高分子材料
·
活性包装
·
采后保鲜
·
纳米复合材料
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2015
·Vol. 41
·期 5
·7133-7139
·
IF 2.605
Rui Du,Yujing Bi,Wenchao Yang,Zhe Peng,Meng Liu,Yang Liu,Baoming Wu,Bangcheng Yang,Fei Ding,Deyu Wang
To improve the cyclic stability of LiNi 0.8 Co 0.1 Mn 0.1 O 2 cycled between 2.8 and 4.5 V vs. Li/Li + , titanium was incorporated into LiNi 0.8 Co 0.1 Mn 0.1 O 2 at various molar concentrations of 1, 2, 3 and 5% during the synthesis. The XRD , EDS and XPS analyses indicated that the titanium ions were effectively incorporated into the lattice of ternary oxides by occupying the transitional metal positions. Among the investigated molar concentrations, 2% Ti-substituted LiNi 0.8 Co 0.1 Mn 0.1 O 2 exhibited the best multifaceted performances with a relatively high capacity (205.7 mA h g −1 at 0.1 C), good rate capability (178.2 mA h g −1 at 1 C, 155.3 mA h g −1 at 5 C) and acceptable cyclic stability (86.9% at the 200th). The post-mortem analysis indicated that Ti substitution alleviates cracking from secondary particles to primary ones. This behavior is most likely due to the decreased ratio of volumetric deformation ( i.e. , 4.82% for the 2% Ti-substituted sample, which is 19.8% lower than that of the pristine one). Our results demonstrate that mechanical properties may play a crucial role in its long cyclability for use as a high-capacity ternary cathode.
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DOI
高影响因子
POSTHARVEST BIOLOGY AND TECHNOLOGY
·
2020
·
IF 4.303
Xueyin Ru,Ning Tao,Yanyan Feng,Qingqing Li,Qingguo Wang
Enzymatic browning is one of the essential issues affecting the quality of fresh-cut produce. In this study, we identified a novel, safe, and effective anti-browning agent, 3-mercapto-2-butanol, which can prevent fresh-cut potatoes from browning for 5 d under the concentration of 25 μL L −1 at 5 °C. The inhibitory effect of 3-mercapto-2-butanol was close to sodium bisulfite. 3-Mercapto-2-butanol was further identified as a competitive inhibitor which directly inhibited the activity of polyphenol oxidase (PPO) by enzyme kinetic analysis, and the expression levels of PPO-related genes ( POT32 and POT33 ) were decreased after 3-mercapto-2-butanol treatment. Besides, the concentration of enzymatic browning substrate tyrosine (Tyr) in the potato chips was found significantly higher in 3-mercapto-2-butanol treatment group than in the control group. We speculated that 3-mercapto-2-butanol could reduce the consumption of Tyr by inhibiting the activity of PPO. Our finding not only provided a novel and safe anti-browning agent candidate (3-mercapto-2-butanol) to efficiently solve the browning issue for fresh-cut food products, but also preliminarily revealed its mechanism in browning inhibition.
研究领域:
食品科学
·
植物生理学
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DOI
高影响因子
Foods
·
2022
·Vol. 11
·期 9
·1360
·
IF 5.561
Zhiguo Jiang,Jiaolong Wang,Dong Xiang,Zhengke Zhang
In the present study, p-hydroxybenzoic acid-grafted chitosan (PA-g-CS) conjugates with different grafting degrees were synthesized by a free radical-regulated grafting approach. The conjugates were further developed into films by casting, and their characteristics and preservative effects on fresh-cut jackfruit were evaluated. Compared to the CS film, the PA-g-CS film showed comprehensive performance improvements, including enhancements of water solubility, anti-ultraviolet capacity, antioxidation, and antibacterial activity. Moreover, compared with CS film, some appreciable and favorable changes of physical properties were observed in the PA-g-CS films, which included water vapor permeability, oxygen permeability, surface morphology, moisture content, and mechanical intensity. Furthermore, compared to CS alone, the application of PA-g-CS films to fresh-cut jackfruit exerted a beneficial effect on the quality of products, as indicated by the inhibition of weight loss, softening, and membrane damage, the maintenance of soluble solids and ascorbic acids contents, as well as a reduced bacterial count and a higher sensory score. Among these PA-g-CS films, the best preservation effect was achieved with the highest degree of grafting (PA-g-CS III). The results suggested that the PA-g-CS film has the potential to be explored as a new type of packaging material for the preservation of fresh-cut fruits and vegetables.
研究领域:
食品科学
·
高分子化学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Yuan Li,Ji-Hao Hao,Yong-Bo Li,Han-Fei Wu,Jian-Hao Zhu,Dong-Ming Yao,Xue-Feng Yu,Xiufang Ding,Xiang Di,Chun-Gang Yuan
Membranes fabricated by amyloid fibrils can achieve separation of organic matters by size-sieving with normally cis -Molecular-Weight-Cut-Off- wise ( cis -MWCO) selective filtration process. However, size-sieving mechanism revealed that the secondary structures of amyloid fibrils (i.e. local intrinsic pores within an amyloid fibril) was in dormancy during filtration process. By elaborately adjusting the pore size within the fiber network to the range of the local pore size within a single amyloid fibril, the nano-array structures of amyloid fibrils was activated under filtration process. Moreover, the convenient nanochannels built by the consecutive amyloid array facilitated the permeation of some specific organic matters, which should have been rejected by size sieving, leading to the trans -MWCO selective performance. Thus in this paper, two kinds of amyloid fibril composite nanofiltration (AFN) membranes were fabricated by spraying amyloid fibrils onto ultrafiltration substrates. The results showed that both AFN membranes possessed outstanding nanofiltration performances on organic-containing aqueous solution (e.g. oligosaccharides, dyes or pharmaceuticals) with different MWCO points. Noteworthy, AFN membranes fabricated by β-lactoglobulin amyloid fibrils (βLG-AFN) can selectively retain the azo-based compounds (e.g. Chicago sky blue 6B, Congo red), while bovine serum albumin amyloid fibrils covered AFN membranes (BSA-AFN) can selectively block the phenothiazines (e.g. Methylene blue, Chlorpromazine). The optimal separation factor of both βLG-AFN and BSA-AFN membranes can reach up to 37 and 8, respectively. Additionally, the trans -MWCO performance of the AFN membrane may also contribute to the selective recycling of dyes in saline or pharmaceuticals in the patients’ urine. Finally, both antifouling and long-term tests further indicated that the AFN membranes were suitable for sustainable applications in recycling organic contaminants.
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Zhikun Zhao,Ziyue Wen,Chunli Li,Yin Ding,Ying Jiang,Feng Wu,Borong Wu,Shi Chen,Daobin Mu
Herein we combine X-ray photoelectron spectroscopy, AC impedance experiments and high resolution transmission electron microscopy to provide new insight into the degradation mechanism of a nickel-rich cathode material under different charge voltages. The degradation is closely related to the charge/discharge cut-off voltage. We use a simple in-situ method to generate a stable Li 2 WO 4 layer with a thickness of ∼10 nm on the LiNi 0.6 Co 0.2 Mn 0.2 O 2 surface during the calcination process using (NH 4 ) 2 WO 4 . This decorated layer prevents side reactions and reduces formation of the insulators LiF and Li 2 CO 3 on the surface of the particles. Electrochemical impedance spectroscopy shows that the Li 2 WO 4 layer has no effect on the interphase film resistance of the cathode/electrolyte, which remains stable during the cycling process. The charge transfer of LiNi 0.6 Co 0.2 Mn 0.2 O 2 is improved a lot by the decorated layer. Transmission electron microscopy shows that increasing amounts of a rock-salt phase substance forms with increasing cut-off voltage, while for the Li 2 WO 4 -decorated sample only a small amount of rock-salt forms on the surface of the cathode material. This study illustrates the relationship between changes in the surface structure with different cut-off voltages and the electrochemical performance, and provides an effective approach to improve the cycling performance of nickel-rich cathode materials.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
JOURNAL OF FOOD BIOCHEMISTRY
·
2021
·Vol. 45
·期 12
·e13995
·
IF 2.72
Yi-Ting Wen,Yu-Qin Liang,Wei-Ming Chai,Qi-Ming Wei,Zi-Yi Yu,Lin-Jun Wang
Tyrosinase (polyphenol oxidase) is the key enzyme of enzymatic browning in fruits and vegetables. In this research, the impact of ascorbic acid on tyrosinase and its anti-browning effect on fresh-cut Fuji apple were investigated. Ascorbic acid had a dual effect on tyrosinase with a half inhibitory concentration (IC 50 ) of 13.40 ± 0.05 µM. Fluorescence assay demonstrated that ascorbic acid interacted with tyrosinase in a dynamic contaction caused by Förster’s resonance energy transfer (FRET) and induced a conformational change of the enzyme. Thermodynamic analysis, copper interaction, and molecular docking further confirmed that ascorbic acid could chelate the copper ions located in active center and interact with amino acid residues of tyrosinase via hydrophobic interaction. In addition, ascorbic acid prevented the browning of fresh-cut apples by increasing APX activity and inhibiting PPO and POD activities which reduce the oxidation of total phenolics and flavonoids. Practical applications The present study demonstrated that ascorbic acid had a strong inhibitory activity against tyrosinase (IC 50 = 13.40 ± 0.05 µM) and anti-browning activity against fresh-cut Fuji apple. It could delay the browning degree of apple juice, increase APX activity, inhibit PPO and POD activities, and reduce the oxidation of total phenolics and flavonoids. These findings provided a basis for the feasible application of ascorbic acid on the preservation of fruits.
研究领域:
食品科学
·
植物生理学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Weiming Chai,Wenshuang Wei,Xinru Hu,Qiuhan Bai,Yiwen Guo,Mingyi Zhang,Shuting Li,Qiuxia Pan
Tyrosinase is a biological macromolecule closely related to browning of fruit and vegetables, melanin production , and tyrosinase inhibitors are usually used to prevent browning and pigmentation . In this study, longan shell tannins (LSTs) were screened as tyrosinase inhibitors and their structures were proved to be mixtures of procyanidins (condensed tannins) and ellagitannins (hydrolyzed tannins). Enzymatic experiments verified that LSTs were efficient inhibitors, and the IC 50 values for monophenolase and bisphenolase were 176.04 ± 10 and 59.94 ± 5 μg mL −1 , respectively. Fluorescence detections and molecular docking revealed that the combination of LSTs to tyrosinase was mainly driven by hydrogen bonding, hydrophobic interaction, as well as van der Waals force , which changed the microenvironment of tyrosine and tryptophan residues as well as enzyme conformation. Circular dichroism and molecular dynamics simulation showed that LSTs affected secondary structures of tyrosinase, resulting in structural stretching and conformational modification of the enzyme. In addition, preservation studies demonstrated that LSTs owned the ability to delay the browning of fresh-cut apples by inhibiting phenolic metabolism, strengthening the antioxidant system, and reducing lipid peroxidation . This paper testified that LSTs are exteaordinary tyrosinase inhibitors, and offered a scientific foundation for the application of LSTs in food industry and medicine.
研究领域:
食品科学
·
植物化学
·
分子生物学
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DOI
PubMed
高影响因子
IONICS
·
2021
·Vol. 27
·期 8
·3239-3249
·
IF 2.817
Li Ying,Yu Chunpeng,Xu Chaoxiang,Liu Wenbo,Dang Mengyue,Jin Hongming,Li Wenxian,Zhang Jiujun
Layered LiNi 0.6 Co 0.2 Mn 0.2 O 2 as a promising cathode material for lithium-ion batteries possesses high theoretical capacity and broad application prospects. However, the destruction of structure during the cycles and the insufficient conductivity severely restrict the cycle life and rate capacity, especially at high cut-off voltage. As an improvement, the dual-coating of LiAlO 2 and graphene oxide (GO) was designed to modify the microstructure and migration dynamics of NCM622 surface. Compared to single coating, LiAlO 2 /GO showed a synergistic effect that simultaneously increased ion/electron transfer rate, reversibility and cycling stability of the cathode material. As a result, the initial capacity of the dual-coating material was 182.6 mAh/g at 200 mA/g (1 C) with a capacity attenuation of 0.06% per cycle in 200 cycles, while it was 222.6 mAh/g at 20 mA/g (0.1 C), and the rate capacity was 100.4 mAh/g at 2000 mA/g (10 C) in a voltage range of 3.0–4.5 V.
研究领域:
材料科学
·
能源存储与转换
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DOI
高影响因子
Food Bioscience
·
2021
·
IF 4.24
Wenzhong Hu,Yuge Guan,Yaru Ji,Xiaozhe Yang
Fresh-cut potatoes ( Solanum tuberosum L.) are appreciated by consumers for their convenience and freshness. In the process of home cooking and food industry, different cutting styles of potato are needed. In order to explore the effect of cutting styles on quality, antioxidant activity, membrane lipid peroxidation, and browning in fresh-cut potatoes, potatoes were cut into pieces, strips, slices and the whole potatoes were used as control. The results indicated that vitamin C content of pieces, strips, and slices potatoes was gradually reduced, while glutathione content increased significantly ( P < 0.05) compared with whole potatoes. Simultaneously, cutting induced phenylalanine ammonia-lyase activity and further enhanced phenol content by 40.48%, 74.88%, and 108.86% in pieces, strips and slices, respectively. And this combined with the enhancement of superoxide dismutase, catalase, ascorbate peroxidase, and glutathione reductase activity, which contributed to the total antioxidant capacity increasing by 1.37–1.46 times compared with control. Furthermore, the increase of lipoxygenase, polyphenol oxidase and peroxidase activity induced by cutting resulted in malondialdehyde content accumulation and browning phenomenon. In conclusion, the degree of membrane lipid peroxidation and browning was slice > strip > piece. Therefore, this study provides useful information to illuminate the mechanism of quality change and browning in fresh-cut potatoes subjected to different cutting styles and makes suggestions on the appropriate cutting style for commercial or home use of potatoes.
研究领域:
食品科学
·
植物生理学
·
农业化学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 37
·e55950
·
IF 2.7
Chen Liu,Boxue Wang,Jin Zhang,Mingpeng Chen,Qingju Liu
Polyimide aerogels are often constrained by the poor mechanical performance when used as thermal insulation. In addition, there is requirement for flame retardant performance in the practical use. In this paper, a fiber-reinforced polyimide aerogel material was prepared by compounding polyisophthaloyl metaphenylene diamine fibers with the aerogel, which present good thermal insulation and excellent mechanical properties, flame retardancy, thermal stability, and certain hydrophobicity, as well as being very lightweight. The compressive strength of the polyimide aerogel was increased from 0.34 to 0.58 MPa by using the fibers as the reinforcing phase; meanwhile, the flame-retardant property was improved, and the limit oxygen index was increased from 33.8 to 36.5. The composite aerogel material has good potential for application in the fields of thermal insulation, building insulation, aerospace, etc.
研究领域:
材料科学
·
热能工程
·
航空航天工程
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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）