Food Science and Technology
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2022
·
IF 2.602
WANG Lixia,DU Guorong,LIU Pei,WANG Xuehui,ZHAO Pengtao,ZHANG Qianting,LEI Xiaoqing,YUAN Huanhuan,CHEN Tongguo,WANG Xiaoyu
Since the grape skin and seed contain different phenolic substances, the proportion of the skin and seed will affect the wine mouthfeel during the wine making process. During the wine ageing, the interaction between flavanols with anthocyanins is an important reaction and considered linked to astringency. Hence, a major question is whether changing the skin-seed ratio will affect the polymerization of phenolic substances in wine, thus affecting the astringency of wine. To answer this, astringency of wine was studied by changing the content of grape skins and seeds by SDS-PAGE, fluorescence quenching and sensory taste. Besides, acetaldehyde-mediated condensation reaction between different flavan-3-ols and malvidin-3-glucoside were studied in model solution. The result showed that grape skins and seeds contribute differently to astringency sensation, mainly because of the difference in the type and content of flavanols and anthocyanins contained in them. In addition, acetaldehyde-induced flavan-3-ols: anthocyanin mixture presents a strong effect toward the interaction with BSA when compared to other phenolic combinations. Furthermore, it was observed that the protein-binding ability of the polyphenols in red wine has a strong correlation with the wine astringency intensity.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Xiaoya Tao,Hang Shi,Ailing Cao,Luyun Cai
In this research, ovalbumin (OVA) and sodium alginate (SA) were used as the materials to prepare OVA-SA composite carriers, which protected and encapsulated the hydrophobic kaempferol (KAE) and the hydrophilic tannic acid (TA). To achieve the purpose of targeted delivery, the TA-Fe 3+ coating film was prepared. Results showed that the observation of small diffraction peaks in carriers proved the formation of TA/Fe 3+ coating film on the surface of four composite nanoparticles (pOVA, pOVA-SA, pOVA-KAE-SA, and pOVA-KAE-TA-SA). The protein structure of the composite nanoparticles coated with TA/Fe 3+ changed, and the order of the changes was pOVA-KAE > pOVA > pOVA-KAE-SA > pOVA-KAE-TA-SA > pOVA-SA. This phenomenon is due to the fact that the chromophore –C=O and the auxo-chromophore –OH are in the opposite position in the benzene ring of TA, and the two substituents have opposite effects and synergize, resulting in the different degrees of redshift of the composite nanoparticle λ max . Additionally, pOVA-SA had the highest α-helix content and the lowest random coils, conferring the protein structure the strongest stability. The coating of TA/Fe 3+ increased the system stability and the thermal stability of the composite nanoparticles. Additionally, the carriers were endowed with antioxidant activity, and their antibacterial ability against Staphylococcus aureus and Escherichia coli was pOVA-KAE-TA-SA > pOVA-KAE-SA > pOVA-KAE > pOVA-SA > pOVA based on the difference in antibacterial diameter (D, mm) and square (S, mm 2 ). pOVA-KAE-TA-SA had the strongest antioxidant activity and antibacterial ability, which improved the bioavailability of TA/KAE. These results provide a theoretical basis for the application of OVA-SA composite nanoparticles in the delivery of bioactive compounds.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Wenjin Wang,Fubin Chen,Lvye Fang,Zhaoxian Li,Zhuang Xie
Hydrogel electrolytes as soft ionic conductors have been extensively exploited to establish skinlike and biocompatible devices. However, in many common hydrogels, there exists irreversible elongation upon prolonged stretching cycles and poor interfacial contact, which have significantly hindered their practical applications where long-term operation at large deformations is needed. Herein, multifunctional soft electronic devices with reversible stretchability and improved electrode/electrolyte interfaces are demonstrated by employing polyacrylamide-based double-network organohydrogel electrolytes soaked with a high content of tannic acid (TA) that affords multiple noncovalent interactions and redox activity. Performances of the TA-rich gels are evaluated for the first time in realizing shape-recoverable stretchable devices against repeated deformations to 500% strain, with superior gel–electrode interfaces exhibiting both intimate adhesion and boosted electrochemical capacitance of >200 mF·cm–2. A maximal 4-fold higher capacitance can be achieved by introducing TA and ethylene glycol (EG) into hydrogels. Moreover, a soft electronic system consisting of stretchable supercapacitors and gel-based microsensors was demonstrated, in which the electronic performance of these devices can be well preserved after >1000 repeated cycles at strains of up to 200%, without obvious residual strain or electrode delamination. This could pave a route to the design of multifunctional gel networks tackling both the mechanical and interfacial issues in soft and biocompatible devices.
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CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Yanfan Yang,Hao Zhou,Xiaoqi Chen,Tingting Liu,Yong Zheng,Lin Dai,Chuanling Si
Lignin, a natural adhesive in plants, has received extensive attention from both academia and industry. However, limited by the reactivity and heterogeneity of industrial lignin raw materials, lignin-based adhesives are not competitive in terms of adhesive performance and reusability. Here, a green and facile method is reported for a polyphenol lignin (Phenol-lignin)-based, ultrastrong, reusable, wide temperature adaptability, and solvent-resistant vitrimer adhesive with molecular designs of lignin extending beyond those in nature. The fabricated Phenol-lignin-based vitrimer exhibits the world’s highest wood lap shear strength of 12.87 MPa among the vitrimer adhesives. Even in extreme environments, such as boiling water (100 °C), liquid nitrogen (-196 °C), and organic solvents, the Phenol-lignin-based vitrimer-bonded wood sheets can still maintain a high level of strength. In addition, due to the good light-to-heat conversion performance of lignin, Phenol-lignin-based vitrimer can be repaired by infrared laser irradiation. The recycled adhesive retained 93.1 % of its strength. This new lignin material will be incorporated into not only industrial adhesives but also various green material systems in the future.
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ACS Nano
·
2023
·
IF 17.1
Yan Gong,Pei Wang,Ran Cao,Jiayingzi Wu,Haoran Ji,Mingsong Wang,Chuang Hu,Peng Huang,Xiansong Wang
Burns are among the most common causes of trauma worldwide. Reducing the healing time of deep burn wounds has always been a major challenge. Traditional dressings not only require a lengthy medical procedure but also cause unbearable pain and secondary damage to patients. In this study, we developed an exudate-absorbing and antimicrobial hydrogel with a curcumin-loaded magnesium polyphenol network (Cur-Mg@PP) to promote burn wound healing. That hydrogel was composed of an ε-poly-l-lysine (ε-PLL)/polymer poly(γ-glutamic acid) (γ-PGA) hydrogel (PP) and curcumin-loaded magnesium polyphenol network (Cur-Mg). Because of the strong water absorption property of ε-PLL and γ-PGA, Cur-Mg@PP powder can quickly absorb the wound exudate and transform into a moist and viscous hydrogel, thus releasing payloads such as magnesium ion (Mg2+) and curcumin (Cur). The released Mg2+ and Cur demonstrated good therapeutic efficacy on analgesic, antioxidant, anti-inflammation, angiogenesis, and tissue regeneration. Our findings provide a strategy for accelerating burn wound healing.
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Journal of Cleaner Production
·
2021
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IF 9.297
Guotao Mao,Fangyuan Wang,Jie Wang,Pengyu Chen,Xiaodong Zhang,Hongsen Zhang,Zhimin Wang,Andong Song
Laccases are green biocatalysts that are advantageous in the bioremediation of the triphenylmethane dye malachite green (MG). Here, Cblac from Caldicellulosiruptor bescii was characterized to be a novel DUF152 laccase. Cblac mutant Mut8 was designed with enhanced thermostability, which was demonstrated by the Thermofluor assay, circular dichroism spectrum, and structural analyses. MG bioremediation by Mut8 at high temperatures was performed and examined for its potential to degrade and detoxify the high-temperature MG effluent. Approximately 100% of 100 mg/L of MG was degraded by 40 U/L of Mut8 within 2 h at 75 °C. Mut8 initiated the degradation via oxidative cleavage of the central C–C bond and N-demethylation of MG, and the intermediates were further demethylated, hydroxylated and oxidized. Moreover, the systematic toxicity assessment of the MG degradation products using bacteria, Zea mays , and zebrafish demonstrated that Mut8 thoroughly eliminated MG toxicity. Taken together, Mut8 could effectively decolorize and detoxify MG at high temperatures, showing great promise as an environmental friendly and effective approach to remediate MG effluent immediately released from the dyeing process, thus avoiding the cooling process and lowering the cost simultaneously.
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JOURNAL OF FOOD SCIENCE
·
2021
·Vol. 86
·期 10
·4262-4274
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IF 3.167
Hui Xue,Meng Xu,Guowen Zhang,Feng Feng,Yuting Wang,Danhui Cao,Yonggang Tu,Yan Zhao
This study aimed to investigatethe mechanism of stewing with tea polyphenols (TP) on the properties of boiled egg white gel (BEWG). The results indicated that, during the stewing process, soluble protein and hardness showed an overall increasing trend, while surface hydrophobicity showed a decreasing trend with blue-shift. The free sulfhydryl group showed that TP could promote the formation of disulfide bonds, and the position of immobilized water at T 2 showed a decreasing trend. Environmental scanning electron microscopy and SDS-PAGE showed that the protein gel aggregation degree increased. Moreover, Fourier transform infrared spectrometry showed that protein polarity increased and that α-helices, β-turn, intramolecular β-sheets, as well as intermolecular antiparallel β-sheets showed an increasing trend. Generally, TP strengthened protein aggregation by promoting the formation of disulfide and hydrogen bonds, thus enhancing the gel strength of BEWG. Moreover, the secondary structure of proteins became more stable under the action of TP, and the higher the concentration of TP, the greater the effect on BEWG. Practical Application TP, an ideal, cheap, and safe natural food additive, can be applied to the processing of egg products because the addition of TP can significantly improve the gel strength of egg white.
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JOURNAL OF MEMBRANE SCIENCE
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2020
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IF 7.183
Ruoxi Wang,Xueting Zhao,Youyou Lan,Lifen Liu,Congjie Gao
Superhydrophilic and underwater superoleophobic membranes have recently attracted increased attention in oily wastewater treatment because of their potential to promote membrane permeability and minimize membrane fouling . Despite recent advances, the manipulation of membrane superwettability is usually achieved by coating functional layers on commercial hydrophobic porous substrates. The direct fabrication of superhydrophilic and underwater superoleophobic microporous membranes still remains a challenge. In this work, we provide a new in situ metal-polyphenol interfacial assembly strategy and prepare a new type of superwetting PES/SPES/MPN membranes. In the phase inversion of membrane formation, the coordination assembly of tannic acid (TA) and transition metal ions takes place alone with the solvent/nonsolvent exchange, resulting in the in situ deposition of metal-polyphenol networks (MPNs) on as-prepared polyether sulfone (PES)/sulfonated polyether sulfone (SPES) membranes. The PES/SPES/MPN membranes exhibit hierarchical surfaces and bi-continuous pores, and the in situ deposited MPNs provide hydrophilic bases. Among them, the PES/SPES/TA-Fe 3+ membrane showed the highest superhydrophilicity and underwater superoleophobicity. Thanks to the excellent superhydrophilicity, the water flux of PES/SPES/TA-Fe 3+ membrane can reach 4423 Lm −2 h −1 . Moreover, the PES/SPES/TA-Fe 3+ membrane exhibits high-performance for oil-in-water emulsion separation with high flux (>1500 Lm −2 h −1 ), excellent oil rejection (>99.5%) and reliable enhanced antifouling and recycling performance. This study provides a novel and facile strategy for the direct fabrication of superwetting microporous membranes, and predicts the potential application of PES/SPES/MPN membranes in oily wastewater treatment.
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FOOD CHEMISTRY
·
2020
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IF 6.306
Yang Zhao,Ze-Hua Huang,Hui-Ming Zhou,Ke-Xue Zhu,Xiao-Na Guo,Wei Peng
The role of polyphenol oxidase (PPO) in the browning of fresh wet noodle sheets (FWNS) was discussed. To release the chemical formation mechanism of the dark spots formed on FWNS, the reconstituted FWNS and PPO-catechol reaction systems were prepared. Different from the overall color change of FWNS, almost all the melanins in dark spots were indirect products of PPO catalysis. The PPO catalytic dehydrogenation was an essential step for the formation of dark spots, but once the phenol dehydrogenation products were formed, the dark spots could still form through a further polymerization process, even though the PPO was completely deactivated. The optimum pH for the phenolic dehydrogenation in FWNS was about 7, and the alkaline condition was advantageous to the progress of the polymerization. Comprehensively, the maximum amount of dark spots was formed at about pH 9.
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Food & Function
·
2020
·Vol. 11
·期 4
·3563-3573
·
IF 4.171
Xing Zhang,Hui He,Tao Hou
Selenium-biofortified crops are a quality functional food resource because of their anti-tumor and anti-cancer properties. In the present study, the conjugates of selenium-biofortified soybean protein and polyphenols were prepared and evaluated by alkali-induced synthesis and in vitro antioxidant tests. Moreover, the antioxidant mechanisms of protecting mice skin damaged by UV-B were studied. The results showed that the antioxidant activity of the conjugate between 7S globulin from selenium-enriched soybean (Se-7S) and EGCG (Se-7S-EGCG) was significantly higher (P < 0.05) than that of Se-7S-GA. Structural characterizations implied that the polymerization of polyphenols with amino acid residues occurred. Se-7S-EGCG inhibited the apoptosis of epidermal cells induced by UV-B. The overexpression of phosphorylated proteins in the MAPK signaling pathway, the activation of related inflammatory factors, and the boost in the MMPs were reversed by Se-7S-EGCG. Overall, this research provides a theoretical and experimental basis for the application of protein and polyphenol conjugates in food and medicine fields.
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Foods
·
2020
·Vol. 9
·期 4
·449
·
IF 4.092
Qiannan Wang,Weihua Liu,Bo Tian,Dongmei Li,Chunhong Liu,Bin Jiang,Zhibiao Feng
Salted duck egg yolk (SDEY) is one of the traditional pickled egg products in Asian countries, which suffers from the weight loss and deterioration of texture characteristics during storage. To better maintain the texture of SDEY, an edible coating based on whey protein isolate nanofibers (WPNFs) with glycerol (Gly) as a plasticizer and incorporating carvacrol (CA) as an antimicrobial agent was developed. Whey protein isolate (WPI, 5%) was used to self-assemble into WPNFs at 80 °C for 10 h. The particle size, zeta-potential and microstructure of WPNFs–CA emulsion were investigated to evaluate the distribution. Results proved that WPNFs–CA emulsion had smaller particle size and better distribution than WPI–CA emulsion. WPNFs–CA/Gly edible coating was then prepared based on WPNFs–CA emulsion. The WPNFs–CA/Gly edible coating exhibited higher antibacterial activity while the WPNFs–CA/Gly film had smooth and continuous surfaces and better transmittance compared with other samples. Furthermore, weight losses and textural properties changes of SDEYs with WPNFs–CA/Gly coating were evaluated. Results proved that salted duck egg yolks with WPNFs–CA/Gly coating exhibited lower weight losses. Textural properties were significantly improved by the WPNFs–CA/Gly coating on SDEYs than those uncoated samples. It was noted that the egg yolks coated with the WPNFs–CA/Gly coating had the lowest hardness increase rate (18.22%). Hence, WPNF-based coatings may have a good development prospect in the food industry.Keywords:whey protein isolate nanofibrils;edible coating;antibacterial activity;salted duck egg yolks
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Scientific Reports
·
2020
·Vol. 10
·期 1
·1-9
·
IF 3.998
Chen Shangqing,Hu Jiayin,Guo Yafei,Deng Tianlong
In this work, a series of polyphenol porous polymers were derived from biomass polyphenols via a facile azo-coupling method. The structure and morphologies of the polymer were characterized by BET, TEM, SEM, XRD, TGA and FT-IR techniques. Batch experiments demonstrated their potentialities for adsorptive separation of Cs + from aqueous solution. Among them, porous polymers prepared with gallic acid as starting material (GAPP) could adsorb Cs + at wide pH value range effectively, and the optimal adsorption capacity was up to 163.6 mg/g, placing it at top material for Cs + adsorption. GAPP exhibited significantly high adsorption performance toward Cs + compared to Na + and K + , making it possible in selective removal of Cs + from ground water in presence of co-existing competitive ions. Moreover, the Cs-laden GAPP could be facilely eluted and reused in consecutive adsorption-desorption processes. As a result, we hope this work could provide ideas about the potential utilization of biomass polyphenol in environmental remediation.
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