FOOD RESEARCH INTERNATIONAL
·
2024
·
IF 7
Xiang Li,Zhenqing Guo,Yikai Song,Ting Du,Feiya Han,Shaochi Wang,Jianxing Feng,Jianlong Wang,Wentao Zhang
Most photosensitizers have limited responsiveness to visible light, however, visible light is a light source with a wide range of wavelengths and the most common in daily life, and making full use of visible light can help to enhance the photodynamic antimicrobial properties of photosensitizers. To tackle this issue, this study confirmed that alizarin has a good absorption capacity for visible light by UV-DRS analysis. Theoretical calculations showed that alizarin might be excited through the charge transfer (CT) mechanism. Under simulated light conditions, alizarin exhibited significant photodynamic inactivation, with a bactericidal efficiency of 99.91 % against S. aureus and L. monocytogenes within 40 min. Meanwhile, the cytolytic rate of alizarin was less than 5 % and the free radical scavenging rate was more than 90 %. To improve the freshness of fresh-cut fruits, we prepared alizarin-pectin (Ali-Pec) coatings using a one-step synthesis method. FT-IR spectroscopic showed the possible presence of hydrogen bonding. It was further found that during storage, the coating-treated fresh-cut apples in the experimental group showed an 8 % reduction in the variation of L-value and a 50 % reduction in the variation of a*-value, and effectively maintained the pH, VC, PPO, and T-AOC levels of the fresh-cut apples, which prolonged the shelf-life of the fresh-cut apples.
研究领域:
食品安全
·
微生物学
·
食品科学
✓ 已验证
DOI
PubMed
高影响因子
POSTHARVEST BIOLOGY AND TECHNOLOGY
·
2024
·
IF 6.4
Chaoyi Shen,Jingshan Rao,Di Wu,Kunsong Chen
Fresh-cut apples are very popular with consumers. Controlling browning and microbial infestation in fresh-cut apples helps extend their shelf life. Micro-nano-fibers have high porosity and high specific surface area , which means they can load and release active substances more efficiently, thus potentially reducing the amount of active substances used to maintain fruit quality and providing sustained release throughout storage. In this work, multifunctional fibrous films were rapidly fabricated by microfluidic blow spinning (MBS) for the fresh-cut apple preservation. The morphology results displayed that the natamycin-loaded fibers exhibited a smooth and homogeneous microstructure with an average diameter between 1.0 and 1.3 µm. A series of characterization results indicated that natamycin was successfully loaded into the fibrous films and the thermal stability and hydrophobicity were improved with increasing natamycin content. The natamycin-loaded fibrous films exhibited excellent antimicrobial activity against Botrytis cinerea . After further addition of ascorbic acid , the prepared multifunctional fibrous films could notably inhibit the fresh-cut apple browning. Metabolomics analysis demonstrated that the films inhibited browning of the fresh-cut apple by reducing the oxidation of the phenolic compound. The above results suggest that the multifunctional fibrous film fabricated by MBS possesses potential for fresh-cut apple preservation.
研究领域:
食品科学
·
材料科学
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DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Yuqing Tian,Lei Zhou,Junping Liu,Kaibo Yu,Wenzhi Yu,Hongwei Jiang,Xiaowei Chen,Shengfeng Peng,Junzhen Zhong,Wei Liu
The preservation of fresh-cut fruits and vegetables has attracted attention to the shelf-life reduction caused by high humidity. Herein, alginate/copper ions cross-linking, in-situ growth and self-assembly techniques of metal-organic frameworks (MOFs) were utilized to prepare a moisture responsive hydrogel bead (HKUST-1@ALG). As the multistage porous structure formation, tea tree essential oil (TTO) load capacity in hydrogel bead (TTO-HKUST-1@ALG) was increased from 6.1% to 21.6%. TTO-HKUST-1@ALG had excellent moisture response performance, and the release rates of TTO increased from 33.89% to 70.98% with moisture increasing from 45% to 95%. Besides, TTO-HKUST-1@ALG exhibited excellent antimicrobial, antioxidant capacity, and biocompatibility. During storage, TTO-HKUST-1@ALG effectively improved the cell membrane integrity by maintaining the balance of reactive oxygen species metabolism. The degradation of cell wall structure and tissue softening were delayed by inhibiting the cell wall-degrading enzymes activity. Briefly, TTO-HKUST-1@ALG improved the storage quality and extended shelf-life of fresh-cut pineapple, which was a promising preservative.
研究领域:
食品科学
·
材料科学
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Nutrition
·
2024
·
IF 4
Liping Zeng,Aiping Fan,Guangming Yang,Yuping Nong,Yifan Lu,Ruopeng Yang
This study investigated the effects of nisin combined with ε-polylysine on microorganisms and the refrigerated quality of fresh-cut jackfruit. After being treated with distilled water (control), nisin (0.5 g/L), ε-polylysine (0.5 g/L), and the combination of nisin (0.1 g/L) and ε-polylysine (0.4 g/L), microporous modified atmosphere packaging (MMAP) was carried out and stored at 10 ± 1°C for 8 days. The microorganisms and physicochemical indexes were measured every 2 days during storage. The results indicated that combined treatment (0.1 g/L nisin, 0.4 g/L ε-polylysine) had the best preservation on fresh-cut jackfruit. Compared with the control, combined treatment inhibited microbial growth (total bacterial count, mold and yeast), reduced the weight loss rate, respiratory intensity, polyphenol oxidase and peroxidase activities, and maintained higher sugar acid content, firmness, and color. Furthermore, it preserved higher levels of antioxidant compounds, reduced the accumulation of malondialdehyde and hydrogen peroxide, thereby reducing oxidative damage and maintaining high nutritional and sensory qualities. As a safe application of natural preservatives, nisin combined with ε-polylysine treatment has great application potential in the fresh-cut jackfruit industry.
研究领域:
食品科学
·
微生物学
·
采后技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2018
·
IF 3.909
Mei-Zhen Lin,Wei-Ming Chai,Chong Ou-Yang,Qian Huang,Xiao-Hui Xu,Yi-Yuan Peng
Omeprazole was first evaluated for its antityrosinase activity and preservation of fresh-cut apples. The results obtained from enzymic analyses showed that the omeprazole inhibited tyrosinase activity ( IC 50 = 40 ± 1.2 μM) with a reversible and competitive mechanism. Fluorescence quenching assays demonstrated that the interaction between omeprazole and tyrosinase was driven by hydrophobic forces and hydrogen bonds in a static procedure. Molecular docking further revealed that hydrogen bonds and hydrophobic forces were generated by omeprazole with the amino acid residues located in the A chain of tyrosinase. Moreover, the results from preservation assays showed that omeprazole could inhibit the activities of polyphenol oxidase (PPO) and peroxidase (POD), prevent the oxidation of total phenolics and flavonoid , thereby delay the browning of fresh-cut apples. Hence, this work identified a novel tyrosinase inhibitor and expands its feasible application as a food preservative.
研究领域:
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Horticultural Plant Journal
·
2022
·
IF 4.24
Xiaoxin Huang,Bing Cheng,Yaqin Wang,Guangmin Liu,Liping Hu,Xiaolu Yu,Hongju He
Glucosinolates (GLS) contribute to the unique flavour, nutrition, and plant defence of the Cruciferous vegetables. Understanding the GLS changes through postharvest processing is essential for defined preservation. In this study, four different fresh-cut types, whole flower (W), floret (F), quarterly cut floret (QF) and shredded floret (FS) of broccoli, were stored for 0, 1, 2 and 3 day (s) to explore GLS responses to postharvest treatments. As a result, seven GLS were identified, mainly including glucoraphanin (RAA), neoglucobrassicin (NEO), and glucobrassicin (GBC) and accounting for 52.69%, 20.12% and 14.99% of the total GLS (21.92 ± 0.48) μmol · g -1 DW, respectively. FS had the sharpest decrease in GLS after three days of storage (6.55 ± 0.37) μmol · g -1 DW, while QF had the least (10.16 ± 0.33) μmol · g -1 DW. All GLS components decreased over storage, except for 4-methoxyglucobrassicin (4 ME) in FS and QF, suggesting its key role in serious wound defence. The results suggested certain postharvest approaches influenced the flavour and nutrition of broccoli.
研究领域:
食品科学
·
植物化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 49
·30597-30609
·
IF 3.361
Yan Kele,Ren Yuemeng,Lv Cheng,Xiao Anshan,Lv Xiaofang
Hydrate slurry transport technology has become a focal point among worldwide researches, due to its high economic efficiency. However, the mechanism and law of hydrate growth kinetics in flow systems were still unclear, especially in high water-cut oil–water systems with hydrate promoters. On this basis, this paper conducted a series of growth kinetic experiments using a high-pressure transparent sapphire cell, and investigated systematically several influencing factors (such as initial pressure, the concentration of emulsifier, hydrate promoter, and the concentration of hydrate promoter) of growth kinetics, and obtained the quantitative relationship between these factors and gas consumption as well as the hydrate growth rate (gas consumption rate). It could be seen from the analysis of these influencing factors that the presence of hydrate promoters can promote hydrate nucleation rapidly and shorten the hydrate induction time, as compared with the (diesel oil + water) system. The concentration of emulsifier is positively correlated with the induction period of hydrate formation, whether it was sodium dodecyl sulfate (SDS) or L-leucine (L-l) systems. The SDS and L-l system could significantly improve the formation kinetics of methane hydrate in the emulsion system, while tetrabutylammonium bromide (TBAB) and polysorbate 80 (Tween80) significantly inhibited the nucleation and growth of methane hydrate in the emulsion. The kinetic curves of hydrate formation showed a trend of first increasing and then gradually decreasing, with the increase of SDS concentrations. However, the hydrate formation kinetics tended to increase gradually and reach equilibrium in the L-l system, with an increase in the concentration of L-l.
研究领域:
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Petroleum Science
·
2023
·
IF 5.6
Xi-Dao Wu,Peng Xiao,Bei Liu,Guang-Jin Chen,Jian-Hua Pang
CO 2 emulsions used for EOR have received a lot of interest because of its good performance on CO 2 mobility reduction. However, most of them have been focusing on the high quality CO 2 emulsion (high CO 2 fraction), while CO 2 emulsion with high water cut has been rarely researched. In this paper, we carried out a comprehensive experimental study of using high water cut CO 2 /H 2 O emulsion for enhancing oil recovery. Firstly, a nonionic surfactant, alkyl glycosides (APG), was selected to stabilize CO 2 /H 2 O emulsion, and the corresponding morphology and stability were evaluated with a transparent PVT cell. Subsequently, plugging capacity and apparent viscosity of CO 2 /H 2 O emulsion were measured systematically by a sand pack displacement apparatus connected with a 1.95-m long capillary tube. Furthermore, a high water cut (40 vol%) CO 2 /H 2 O emulsion was selected for flooding experiments in a long sand pack and a core sample, and the oil recovery, the rate of oil recovery, and the pressure gradients were analyzed. The results indicated that APG had a good performance on emulsifying and stabilizing CO 2 emulsion. An inversion from H 2 O/CO 2 emulsion to CO 2 /H 2 O emulsion with the increase in water cut was confirmed. CO 2 /H 2 O emulsions with lower water cuts presented higher apparent viscosity, while the optimal plugging capacity of CO 2 /H 2 O emulsion occurred at a certain water cut. Eventually, the displacement using CO 2 /H 2 O emulsion provided 18.98% and 13.36% additional oil recovery than that using pure CO 2 in long sand pack and core tests, respectively. This work may provide guidelines for EOR using CO 2 emulsions with high water cut.
研究领域:
石油工程
·
化学工程
✓ 已验证
产品关联
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
✓ 已验证
产品关联
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
✓ 已验证
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
✓ 已验证
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.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）