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Yuchen-Zhang, Du MR, Zhang QY, Yang SY, Chen JQ, Dan CM, Lian LD, Wang J. Armillariella tabescens-derived polysaccharides alleviated Ɒ-Gal-induced neuroinflammation and cognitive injury through enterocerebral axis and activation of keap-1/Nrf2 pathway. Int J Biol Macromol 2024; 273:133035. [PMID: 38866276 DOI: 10.1016/j.ijbiomac.2024.133035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 06/06/2024] [Accepted: 06/07/2024] [Indexed: 06/14/2024]
Abstract
The early symptoms of neurodegenerative diseases include oxidative stress disorder and accelerated inflammation levels. Edible fungi polysaccharides play essential roles in anti-neuroinflammation. We analyzed the regulatory mechanisms of polysaccharides from extracellular Armillariella tabescens (ATEP) in alleviating neuroinflammation in mice. Mice were induced with d-galactose and aluminum chloride to establish an animal model of Alzheimer's disease, then intragastrically treated with ATEP, which had been previously analyzed for its physicochemical properties. We assessed the critical characteristics of mice treated for neuroinflammation, including cognitive behavior, the anti-inflammatory potential of ATEP in hippocampal pathology and critical protein expression, and changes in fecal microbial composition and metabolites. ATEP intervened in oxidative stress by enhancing antioxidant enzyme activities and suppressing the Keap-1/Nrf2 signaling pathway. Changing the Nrf2 content in the nucleus led to changes in the downstream oxidation-related enzymes, HO-1, NQO-1, iNOS, and COX-2, and the neuronal morphology in CA3 region of the hippocampus. Microbiome analysis revealed that ATEP remodeled the gut microbiotas and regulated the short-chain fatty acids-producing bacteria. Early intervention with ATEP via active dietary supplementation may promote neuroprotection.
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Affiliation(s)
- Yuchen-Zhang
- Food and Function Microbiology Laboratory, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Min-Ru Du
- Food and Function Microbiology Laboratory, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Qian-Yuan Zhang
- Food and Function Microbiology Laboratory, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Shu-Yu Yang
- Food and Function Microbiology Laboratory, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Jia-Qi Chen
- Food and Function Microbiology Laboratory, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Cen-Meng Dan
- Food and Function Microbiology Laboratory, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Ling-Dan Lian
- Food and Function Microbiology Laboratory, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Jie Wang
- Food and Function Microbiology Laboratory, College of Food Science, South China Agricultural University, Guangzhou 510642, China.
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2
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Xu M, Gao Y, Xu Y, Xu T, Ma J, Li J, Yang T, Zhang Y, Du Y, Xu Q. Synthesis of acylated derivatives of alginate oligosaccharides and evaluation of their potential antibacterial activities against Staphylococcus aureus. Int J Biol Macromol 2024; 271:132484. [PMID: 38821795 DOI: 10.1016/j.ijbiomac.2024.132484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 04/28/2024] [Accepted: 05/16/2024] [Indexed: 06/02/2024]
Abstract
Alginate oligosaccharides (AOS) are crucial carbohydrate-based biomaterial used in the synthesis of potential drugs and biological agents, but their antibacterial activities are not significant. In this study, AOS acylated derivatives were synthesized by grafting maleic anhydride (MA) onto AOS at varying ratios. Additionally, their inhibitory effects against Staphylococcus aureus were thoroughly investigated. Characterization of the AOS acylated derivatives (AOS-MA-x, where x = 1, 5, 10, and 20) was conducted using Fourier-transformed infrared spectroscopy, 1H nuclear magnetic resonance spectroscopy, and X-ray diffraction, which confirmed the successful synthesis of these derivatives. The bacteriostatic activity of the AOS-MA derivatives was assessed using growth curves and plate coating method, demonstrating significant antibacterial effects against S. aureus, as compared with AOS. Among these derivatives, AOS-MA-20 exhibited the most potent bacteriostatic activity and was selected for further investigation of its inhibitory mechanism. Scanning electron microscopy analysis revealed that treatment with AOS-MA-20 led to the lysis and rupture of S. aureus cells, expelling their intracellular contents. Moreover, AOS-MA-20 disrupted the integrity of cell wall and cell membrane, impacted ATPase activity, and inhibited the formation of biofilm to some extent, ultimately resulting in bacterial death. These findings lay a foundational framework for the development of environmentally friendly antimicrobial agents.
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Affiliation(s)
- Mei Xu
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian 116600, China
| | - Yujia Gao
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian 116600, China
| | - Yunshu Xu
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian 116600, China
| | - Tiantian Xu
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian 116600, China
| | - Jinlong Ma
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian 116600, China.
| | - Jiaqi Li
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian 116600, China
| | - Ting Yang
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian 116600, China
| | - Yanmei Zhang
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian 116600, China.
| | - Yuguang Du
- Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
| | - Qingsong Xu
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian 116600, China.
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Jin W, Xiao C, Zhao J, Yang G, Chen Q, Feng L. Exposure to trace levels of live seaweed-derived antibacterial 2,4,6-tribromophenol modulates β-lactam antibiotics resistance in Vibrio. JOURNAL OF HAZARDOUS MATERIALS 2024; 469:133774. [PMID: 38417370 DOI: 10.1016/j.jhazmat.2024.133774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 02/07/2024] [Accepted: 02/09/2024] [Indexed: 03/01/2024]
Abstract
Non-antibiotic substances have been found to contribute to the spread of antibiotic resistance. Bromophenols (BPs) are special anti-bacterial substances obtained from seaweed. This study explored the modulatory effect of trace BPs from a live seaweed on the antibiotic resistance of pathogenic Vibrio (V.) strains. A hydroponic solution of Ulva fasciata was found to contain trace levels (9-333 μg L-1) of 2,4,6-tribromophenol (TBP), a typical BP. TBP at a concentration of 165 μg L-1 significantly increased the inhibition zone diameter of widely used β-lactam antibiotics (amoxicillin and ampicillin) against V. alginolyticus M7 (Va. M7) and V. parahaemolyticus M3 (Vp. M3) as well as reduced the minimum inhibitory concentration by 2-4 fold against Va. M7. Whole genome re-sequencing analysis demonstrated that Va. M3 (53-60) had more mutant genes than Vp. M7 (44) in β-lactam resistance pathway. Transcriptome sequencing analysis, along with verification through RT-qPCR, further showed that oligopeptide permease (opp) was the only differentially expressed gene (DEG) among the mutated genes in the β-lactam resistance pathway. The opp transport activity and membrane permeability of Vibrio were both enhanced at 165 μg L-1 of TBP, and the ability of biofilm formation was also decreased. Thus, antibiotics resistance improvement of Vibrio by TBP was potentially related with the promoted opp transport activity, membrane permeability and inhibited biofilm formation.
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Affiliation(s)
- Weimei Jin
- College of Marine Science and Technology, Zhejiang Ocean University, Zhoushan 316022, People's Republic of China
| | - Changyan Xiao
- College of Marine Science and Technology, Zhejiang Ocean University, Zhoushan 316022, People's Republic of China
| | - Jing Zhao
- Australian Centre for Water and Environmental Biotechnology, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Guangfeng Yang
- Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, Zhejiang Ocean University, Zhoushan 316022, People's Republic of China
| | - Qingguo Chen
- Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, Zhejiang Ocean University, Zhoushan 316022, People's Republic of China
| | - Lijuan Feng
- College of Marine Science and Technology, Zhejiang Ocean University, Zhoushan 316022, People's Republic of China; Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, Zhejiang Ocean University, Zhoushan 316022, People's Republic of China.
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He Z, Zhu B, Deng L, You L. Effects of UV/H 2O 2 Degradation on the Physicochemical and Antibacterial Properties of Fucoidan. Mar Drugs 2024; 22:209. [PMID: 38786600 PMCID: PMC11123097 DOI: 10.3390/md22050209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 04/26/2024] [Accepted: 05/02/2024] [Indexed: 05/25/2024] Open
Abstract
The applications of fucoidan in the food industry were limited due to its high molecular weight and low solubility. Moderate degradation was required to depolymerize fucoidan. A few studies have reported that fucoidan has potential antibacterial activity, but its antibacterial mechanism needs further investigation. In this study, the degraded fucoidans were obtained after ultraviolet/hydrogen peroxide treatment (UV/H2O2) at different times. Their physicochemical properties and antibacterial activities against Staphylococcus aureus and Escherichia coli were investigated. The results showed that the average molecular weights of degraded fucoidans were significantly decreased (up to 22.04 times). They were mainly composed of fucose, galactose, and some glucuronic acid. Fucoidan degraded for 90 min (DFuc-90) showed the strongest antibacterial activities against Staphylococcus aureus and Escherichia coli, with inhibition zones of 27.70 + 0.84 mm and 9.25 + 0.61 mm, respectively. The minimum inhibitory concentrations (MIC) were 8 mg/mL and 4 mg/mL, respectively. DFuc-90 could inhibit the bacteria by damaging the cell wall, accumulating intracellular reactive oxygen species, reducing adenosine triphosphate synthesis, and inhibiting bacterial metabolic activity. Therefore, UV/H2O2 treatment could effectively degrade fucoidan and enhance its antibacterial activity.
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Affiliation(s)
| | | | | | - Lijun You
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; (Z.H.); (B.Z.); (L.D.)
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Zhang K, Chen H, Hao Y, Li W, Li Y, Zhang W, Chen Y. Armillariella tabescens polysaccharide treated rats with oral ulcers through modulation of oral microbiota and activation of the Nrf2/HO-1 pathway. Int J Biol Macromol 2024; 261:129697. [PMID: 38272409 DOI: 10.1016/j.ijbiomac.2024.129697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 01/04/2024] [Accepted: 01/21/2024] [Indexed: 01/27/2024]
Abstract
We identified Armillariella tabescens polysaccharide (PAT-W), a compound isolated from a Chinese medicinal mushroom, as a potential novel oral ulcer (OU) drug. In treating OU rats with PAT-W, especially in the high-dose group, oral mucous tissue TNF-α, IL-1β, and IL-6 levels were markedly reduced, and pathological morphology and oxidative stress were effectively improved. Western blot analysis showed that the PAT-W channel ameliorated OU mucous tissue damage, which depends on the activation of the Nrf2/HO-1 antioxidant signaling pathway. Furthermore, high-throughput sequencing results showed that PAT-W regulated the maladjustment of the oral microbiota caused by OU. Therefore, based on the new viewpoint of activating the Nrf2/HO-1 pathway and regulating oral microbiota, PAT-W is expected to become a new natural drug for treating oral ulcers and improving patients' quality of life.
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Affiliation(s)
- Kunfeng Zhang
- Anhui Key Laboratory of Ecological Engineering and Biotechnology, School of Life Sciences, Anhui University, Hefei 230601, Anhui, China; Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Hao Chen
- Anhui Key Laboratory of Ecological Engineering and Biotechnology, School of Life Sciences, Anhui University, Hefei 230601, Anhui, China
| | - Yunbo Hao
- Anhui Key Laboratory of Ecological Engineering and Biotechnology, School of Life Sciences, Anhui University, Hefei 230601, Anhui, China
| | - Wensen Li
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Yong Li
- Anhui Key Laboratory of Ecological Engineering and Biotechnology, School of Life Sciences, Anhui University, Hefei 230601, Anhui, China
| | - Wenna Zhang
- Anhui Key Laboratory of Ecological Engineering and Biotechnology, School of Life Sciences, Anhui University, Hefei 230601, Anhui, China
| | - Yan Chen
- Anhui Key Laboratory of Ecological Engineering and Biotechnology, School of Life Sciences, Anhui University, Hefei 230601, Anhui, China.
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Ji QY, Wang W, Yan H, Qu H, Liu Y, Qian Y, Gu R. The Effect of Different Organic Acids and Their Combination on the Cell Barrier and Biofilm of Escherichia coli. Foods 2023; 12:3011. [PMID: 37628010 PMCID: PMC10453431 DOI: 10.3390/foods12163011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/06/2023] [Accepted: 08/08/2023] [Indexed: 08/27/2023] Open
Abstract
Organic acids are natural antimicrobial compounds commonly used in the food industry. In this study, acetic, lactic, butyric, citric, and malic acid at minimum inhibitory concentrations and their combinations at optimal inhibition concentrations were used to treat E. coli, and the effects on the cell barrier and biofilm of E. coli were evaluated. Acetic acid showed the highest membrane-damaging effect, while citric acid and malic acid could specifically damage the cell wall of E. coli, leading to alkaline phosphatase leakage. The RT-qPCR results showed that organic acids upregulated the membrane-protein-related genes of E. coli, and the combination of organic acids had a wider range of effects than single organic acid treatment. Moreover, organic acids inhibited the formation of E. coli biofilm and cellular activity within the biofilm. This study showed that the combination of organic acids plays a synergistic inhibitory role mainly through multiple destructive effects on the cell barrier and exhibited synergistic anti-biofilm effects. The three-three combination of acetic, lactic acid, and a third organic acid (butyric, citric, or malic) can play a better synergistic antibacterial effect than the two-pair combination of acetic and lactic acid. These findings have implications for the usage, development, and optimization of organic acid combinations.
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Affiliation(s)
| | | | | | | | | | | | - Ruixia Gu
- College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China; (Q.-Y.J.); (W.W.); (H.Y.); (H.Q.); (Y.L.); (Y.Q.)
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Chen L, Wu F, Xiang M, Zhang W, Wu Q, Lu Y, Fu J, Chen M, Li S, Chen Y, Du X. Encapsulation of tea polyphenols into high amylose corn starch composite nanofibrous film for active antimicrobial packaging. Int J Biol Macromol 2023:125245. [PMID: 37330086 DOI: 10.1016/j.ijbiomac.2023.125245] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 06/01/2023] [Accepted: 06/05/2023] [Indexed: 06/19/2023]
Abstract
Starch-based composite nanofibrous films loaded with tea polyphenols (TP) were successfully fabricated through electrospinning high amylose corn starch (HACS) with aid of polyvinyl alcohol (PVA), referred as HACS/PVA@TP. With the addition of 15 % TP, HACS/PVA@TP nanofibrous films exhibited enhanced mechanical properties and water vapor barrier capability, and their hydrogen bonding interactions were further evidenced. TP was slowly released from the nanofibrous film and followed Fickian diffusion mechanism, which achieved the controlled sustained release of TP. Interesting, HACS/PVA@TP nanofibrous films effectively improved antimicrobial activities against Staphylococcus aureus (S. aureus) and prolonged the shelf life of strawberry. HACS/PVA@TP nanofibrous films showed superior antibacterial function by by destroying cell wall and cytomembrane, and degrading existing DNA fragments, stimulating excessive intracellular reactive oxygen species (ROS) generation. Our study demonstrated that the functional electrospun Starch-based nanofibrous films with enhanced mechanical properties and superior antimicrobial activities were potential for the application in active food packaging and relative areas.
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Affiliation(s)
- Lei Chen
- Anhui Key Laboratory of Ecological Engineering and Biotechnology, School of Life Sciences, Anhui University, Hefei 230601, China
| | - Fen Wu
- Anhui Key Laboratory of Ecological Engineering and Biotechnology, School of Life Sciences, Anhui University, Hefei 230601, China
| | - Ming Xiang
- Anhui Key Laboratory of Ecological Engineering and Biotechnology, School of Life Sciences, Anhui University, Hefei 230601, China
| | - Wenna Zhang
- Anhui Key Laboratory of Ecological Engineering and Biotechnology, School of Life Sciences, Anhui University, Hefei 230601, China
| | - Qingxi Wu
- Anhui Key Laboratory of Ecological Engineering and Biotechnology, School of Life Sciences, Anhui University, Hefei 230601, China
| | - Yongming Lu
- Anhui Key Laboratory of Ecological Engineering and Biotechnology, School of Life Sciences, Anhui University, Hefei 230601, China
| | - Jiajun Fu
- Anhui Key Laboratory of Ecological Engineering and Biotechnology, School of Life Sciences, Anhui University, Hefei 230601, China
| | - Meilu Chen
- Anhui Key Laboratory of Ecological Engineering and Biotechnology, School of Life Sciences, Anhui University, Hefei 230601, China
| | - Songnan Li
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou 225009, China
| | - Yan Chen
- Anhui Key Laboratory of Ecological Engineering and Biotechnology, School of Life Sciences, Anhui University, Hefei 230601, China.
| | - Xianfeng Du
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, China.
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Enhancing the antibacterial activity of Lactobacillus reuteri against Escherichia coli by random mutagenesis and delineating its mechanism. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.102209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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9
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Bai X, Li X, Liu X, Xing Z, Su R, Wang Y, Xia X, Shi C. Antibacterial Effect of Eugenol on Shigella flexneri and Its Mechanism. Foods 2022; 11:foods11172565. [PMID: 36076751 PMCID: PMC9455010 DOI: 10.3390/foods11172565] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 08/19/2022] [Accepted: 08/23/2022] [Indexed: 11/16/2022] Open
Abstract
Shigella flexneri (Sh. flexneri), which can be found in food and the environment, is a widespread food-borne pathogen that causes human diarrhea termed “shigellosis”. In this study, eugenol, a natural active substance, was investigated for its antibacterial activity against Sh. flexneri. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of eugenol against Sh. flexneri ATCC 12022 was 0.5 and 0.8 mg/mL. The growth curves and inhibitory effect in LB broth, PBS, vegetable juice, and minced pork showed that eugenol had a good activity against Sh. flexneri. Research findings indicated the superoxide dismutase activity of Sh. flexneri was inhibited after eugenol treatment, resulting in concentrations of intracellular reactive oxygen species and an increase in malondialdehyde. The flow cytometry analysis and field emission scanning electron microscopy results revealed obvious damage to cell membrane integrity and changes in the morphology of Sh. flexneri. In addition, the intracellular ATP concentration leaked from 0.5 μM to below 0.05 μM and the membrane potential showed a concentration-dependent depolarization after eugenol treatment. In summary, eugenol exerted strong antibacterial activity and has the potential to control Sh. flexneri in the food industry.
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Affiliation(s)
- Xiangyang Bai
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China
| | - Xuejiao Li
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China
| | - Xue Liu
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China
| | - Zeyu Xing
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China
| | - Ruiying Su
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China
| | - Yutang Wang
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China
| | - Xiaodong Xia
- School of Food Science and Technology, National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116304, China
| | - Chao Shi
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China
- Correspondence: ; Tel.: +86-29-8709-2486; Fax: +86-29-8709-1391
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