LWT-FOOD SCIENCE AND TECHNOLOGY
·
2024
·
IF 6
Run-Qi Jia,Wei-Wei He,Yu-Jie Tang,Xiao-Xiao Song,Jun-Yi Yin
Xanthan gum (XG) is a widely used thickener known for its high viscosity and excellent stability. However, the presence of ascorbic acid (AA) leads to a clear decrease in its viscosity, thereby affecting the application of xanthan gum in food products containing AA. Therefore, the aim of this study was to uncover the mechanism by which AA reduces the viscosity of xanthan gum. Ascorbic acid (0.1 mmol/L) caused a viscosity loss reaching up to 96% for xanthan gum solutions (2 g/L). The reaction was further enhanced by heating at 60 °C for 1 h without stirring, a weakly acidic system at pH 5.4, and the addition of hydrogen peroxide or metal ions (Fe 2+ and Cu 2+ ). Interestingly, AA induction produces free radicals and changes in their content correlate with a decrease in XG viscosity. Moreover, removing dissolved oxygen by heating and nitrogen purging treatment effectively reduced AA-derived free radical levels and prevented the decrease in XG viscosity. The decrease in viscosity of XG caused by AA involved its free radicals generated through an oxygen-dependent pathway.
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DOI
高影响因子
Food Bioscience
·
2023
·
IF 5.2
Jun-qi Zhan,Wen-tao Yu,Jing-jing Fu,Gao-shang Li,Ya-qin Hu,Yue-wen Chen
Surimi is a protein-rich food . The peptides hydrolyzed by surimi have many functional activities and showed strong antioxidant activity in ABTS free radical scavenging experiments, hydroxyl radical scavenging experiments and iron ion reduction experiments. The scavenging rates of ABTS ions, hydroxyl radicals and iron ions were 62.83%, 74.81% and 0.035 mg/mL, respectively. 3D printing ink was formulated by compounding carrageenan , xanthan gum and surimi peptides. The surimi polypeptide “ink” contains 3% carrageenan, 4% xanthan gum and 4 mg/mL surimi polypeptide. This “ink” not only has good printability, but also has stable antioxidant properties. The effect of the peptides on the printed structures can also be observed under an inverted fluorescence microscope . In the in vitro digestion experiment, the surimi polypeptide 3D printing ink added with carrageenan and xanthan gum can release most of the peptides. After in vitro digestion experiments, the antioxidant activity of surimi polypeptides increased. The above experiments have proved that surimi polypeptide is a high-quality raw material for preparing 3D printing ink.
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DOI
高影响因子
MINERALS ENGINEERING
·
2020
·
IF 3.795
Hai Yan,Bingqiao Yang,Mengyuan Zeng,Pengliang Huang,Aiping Teng
Molybdenite and chalcopyrite is generally separated through the selective depression of chalcopyrite using potentially toxic depressants such as sodium sulfide and cyanides. In this work, xanthan gum (XG), a polymer polysaccharide, was investigated as a potential molybdenite depressant in copper-molybdenum sulfides separation. Single mineral flotation tests indicated that molybdenite could be effectively depressed by XG, while chalcopyrite was slightly affected. The artificial mixed minerals flotation tests proved that molybdenite and chalcopyrite could be selectively separated with the addition of XG. The adsorption mechanism was studied through zeta potential and infrared spectroscopy measurements. The results revealed that XG mainly adsorbed on molybdenite surfaces other than chalcopyrite. In a word, the experiments results illustrated that XG could be applied as a promising depressant in the selective flotation separation of molybdenite and chalcopyrite, which has the advantage of environment compatibility over conventional copper depressants.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Zhoujie Wang,Houqin Wu,Jie Yang,Zhen Tang,Liping Luo,Kaiqian Shu,Yanbo Xu,Longhua Xu
The inability of rare earth and gangue minerals to be efficiently separated by flotation due to their similar physicochemical properties is a major challenge of the rare earth industry. Bastnaesite is one of the principal sources of light rare earth elements. The use of traditional flotation reagents often poses the problem of poisonous wastewater generation. Therefore, we use xanthan gum (XG) as a non-toxic, biodegradable, and cheap depressant to selectively separate bastnaesite from calcite by flotation and probe the corresponding mechanism. Microflotation experiments/zeta potential measurements conducted with/without XG using sodium oleate as a collector demonstrate that at pH 8, XG decreases the flotation recoveries of calcite and bastnaesite by 85.09 and 22.37%, respectively. Further analysis of adsorption behaviour on the mineral surface and possible reagent-mineral interactions shows that selective mineral separation is due to the preferential interaction of XG with Ca ions on the calcite surface and the suppression of oleate ion adsorption thereon due to the steric hindrance of polymeric XG. Hence with regard to the potential of XG in calcium-bearing mineral separation, XG could be as a new depressant for RE mineral flotation.
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DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2017
·
IF 4.811
Shunli Liu,Fang Yao,Olayinka Oderinde,Zhihong Zhang,Guodong Fu
Three-dimensional xanthan gum (XG)/graphene oxide (GO) hybrid aerogels were fabricated by ice crystal templating without using chemical modifiers. The hybrid aerogels were prepared by the stirring of xanthan gum-graphene oxide hybrid solution, followed by freezing at low temperature and finally by freeze-drying. The whole preparation could be completed within 12 h without producing any contamination and thus considered a fast, simple, economical, and green method for aerogel fabrication. XG/GO hybrid aerogels possessed different hierarchical pore structures because of various freezing temperatures. A network composed of co-aligned pore channels was obtained at a freezing temperature of −40 °C. The as-prepared hybrid aerogels exhibited stability and excellent adsorption capacity for organic dyes and heavy metal ions. Therefore, these aerogels could be used as efficient adsorbents in water purification. This study provided a basis for the cost-effective and large-scale commercial production of high-performance graphene oxide-based aerogels for water purification.
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DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Lele Li,Wenjuan Wang,Suping Ji,Qiang Xia
This study aimed to prepare soy protein isolate-xanthan gum complexes (SPI-XG) at pH 7.0 and as emulsifiers to prepare Pickering emulsions for delivering quercetin (Que). The results showed that SPI-XG exhibited a gel network structure in which protein particles were embedded. Fourier transform infrared spectroscopy (FTIR) and molecular docking elucidated that SPI-XG formed through hydrogen bonding, hydrophobic, and electrostatic interactions. Three-phase contact angle (θo/w) of SPI-XG approached 90° with biphasic wettability. SPI-XG adsorbed at the oil-water interface to form an interfacial layer with a gel network structure, which prevented droplet aggregation. Following in vitro simulated digestion, Que displayed higher bioaccessibility in SPI-XG stabilized Pickering emulsions (SPI-XG PEs) than SPI stabilized Pickering emulsions. In conclusion, SPI-XG PEs were a promising system for Que delivery.
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DOI
PubMed
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2024
·
IF 2.1
Yajun Wang,Yiyan Gao,Kai Shi,Guanghui Gao
Wearable sensors based on ionic hydrogels have attracted increasing attention, but practical application is often hampered by poor environmental tolerance. Here, an environment-stable and tough hydrogel was constructed by introducing glycerin, sodium chloride and xanthan gum into a polyvinyl alcohol hydrogel network. Hydrogen bonds were formed among glycerin, xanthan gum and polyvinyl alcohol chains to enhance the toughness of hydrogel. Furthermore, the salting-out effect of polyvinyl alcohol chains induced by sodium chloride also improved the strength of hydrogel. Besides, the hydrogel was highly sensitive to mechanical deformation of tensile and compressive strain. The obtained hydrogel with sensitivity was capable of serving as a wearable sensor for monitoring human motions including speaking, bending articulation and so on. Notably, the hydrogel still maintained flexibility, toughness and conductivity under subzero or ambient conditions for a long time. This simple method paves an effective way for designing environment-stable and tough hydrogels.
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高影响因子
FOOD CHEMISTRY
·
2026
·
IF 10.4
Meixia Zheng,Shaojie Zhong,Cheng Lin,Jianfu Chen,Yangyang Liu,Kok Bing Tan,Yujing Zhu
A novel packaging material (SXS) composed of silk protein peptide (SPP), xanthan gum (XG), and soy protein isolate (SPI) was developed. The incorporation of SPP significantly enhanced the antioxidant activity of the SXS cling film. The aromatic amino acids in SPP and SPI absorbed ultraviolet light, improving the film's UV resistance. Molecular docking verified the interactions among SPI, XG and SPP, indicating multipoint binding that supports the proposed network-strengthening mechanism. The optimum amount of SPP is 6%, providing the best overall balance between UV barrier properties, mechanical strength, and water contact angle. For food preservation, SXS6% reduced the weight loss rate from 6.42% to 4.34%, increased vitamin C (V c ) retention for grape (61% to 79%) and for yellow peaches (51% to 84%). By reducing water evaporation, delaying respiration, and preserving nutrients, the SXS6% film effectively extended the shelf life of fruits, demonstrating its potential for use in food preservation applications.
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DOI
PubMed
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2026
·Vol. 37
·期 7
·e70695
·
IF 3.8
Yong Zhao,Jingjing Cao,Yao Sun,Yi Li,Ce Liang,Hongbin Cui
The present study involves the development of a hydrogel membrane by the cross-linking of xanthan gum (XG) and sodium citrate (SC) by a dehydration condensation reaction. The hydrophobic cavities of hydroxypropyl-β-cyclodextrin (HPCD) are integrated into this system, and the hydrogel system that has been successfully fabricated can be used for drug delivery. Moreover, a hydrogel-based delivery platform was developed by incorporating varying concentrations of magnetic nanoparticles, enabling the modulation of drug release rates through external magnetic field stimulation. This drug delivery system enables regulation of drug release efficiency through tuning the applied magnetic field, whereas an increase in the dose of magnetic nanoparticles will improve the efficiency of drug release. The experimental findings suggested that the drug sustained-release performance of the XG/SC/HPCD drug-loaded hydrogel film was effectively enhanced under an applied magnetic field. Specifically, the drug release after 300 min from the hydrogel film containing 15% magnetic nanoparticles was 67% lower with the magnetic field applied compared to without it. Furthermore, biocompatibility tests (Cell Counting Kit-8 (CCK-8) assay) showed that the cell viability of L929 fibroblasts remained at approximately 99% after 4 h, confirming that this series of hydrogel films possesses good cytocompatibility and exhibits no cytotoxicity.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Yiyang Zhou,Lei Zhang,Xiangyu Lin,Jie Lu,Zhen Huang,Penghao Sun,Yibing Zhang,Xu Xu,Qingtao Li,He Liu
Ionic conductive hydrogels (ICHs) have received widespread attention as an ideal candidate for flexible electronic devices. However, conventional ICHs failed in widespread applications due to their inability to simultaneously possess high toughness, high ionic conductivity , and anti-freezing properties. Here, polyvinyl alcohol (PVA) and polyacrylamide (PAAm) were first dissolved in the zinc chloride solution, in which zinc ions (Zn 2+ ) act as ionic cross-linkers and conducting ions, followed by the introduction of xanthan gum (XG) with a unique structure of trisaccharide side chains into the PVA/PAAm semi-interpenetrating network to prepare a dual-network ICHs (refers as PPXZ). Enabled by the synergistic effect of intermolecular chemical covalent cross-linking and physical cross-linking, PPXZ hydrogels exhibit significantly improved mechanical properties without sacrificing electrical conductivity . Furthermore, PPXZ hydrogels are successfully applied to flexible electronic devices, such as strain sensors and zinc ion hybrid supercapacitors, exhibiting satisfactory sensing sensitivity and cycling stability at a wide temperature range, respectively. Even at a high current density (10 A g −1 ), the capacity of the supercapacitor retains 88.24 % after 10,000 cycles. This strategy provides new insight for ICHs in wide temperature-applied flexible electronic devices.
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高影响因子
COLLOID AND POLYMER SCIENCE
·
2022
·Vol. 300
·期 10
·1187-1195
·
IF 2.434
Li Xin,Gao Yongfeng,Li Yaozong,Li Yanqun,Liu Haotian,Yang Zhuohong,Wu Hong,Hu Yang
Cinnamon essential oil (CNO) is a natural and renewable antibacterial agent. However, CNO is highly volatile and unstable, which limits its practical application as a long-term and wide antibacterial agent. In order to improve the CNO stability, we have microencapsulated CNO into composite microcapsules basing on Pickering emulsion stabilized by silica (SiO 2 ) nanoparticles. The CNO-loaded composite microcapsules possess the hybrid microcapsule shell including SiO 2 , xanthan gum and chitosan. Moreover, the results show that the microcapsules have spherical appearance. Microencapsulation technique effectively promotes the CNO stability, and the loaded CNO is slowly released from microcapsules. The antibacterial test indicates that the minimal inhibitory concentration of microcapsules was 2 mg mL −1 against Escherichia coli and Staphylococcus aureus , and the microcapsules can play an effective long-term antibacterial effect. Thus, Pickering emulsion templates is a convenient and effective technique to construct antibacterial essential oil-contained microcapsules, which can be used as long-term antibacterial agents.
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Yan Li,Ziqian Liu,Xin Wan,Lingying Xie,Hui Chen,Guo Qu,Han Zhang,Yue-Fei Zhang,Shicheng Zhao
In this work, xanthan gum-based composites were successfully graft-modified by amantadine (XG-Fe 3+ /AM) with higher adsorption capacity and selectivity on recycling cationic dye (methylene blue, MB) from aqueous solution. The adsorption equilibrium of MB could be achieved approximately within 5 min when the initial concentration was 100 mg/L, and the maximum adsorption capacity was up to 565 mg/g. After 5 desorption-regeneration cycles, the removal rate of XG-Fe 3+ /AM for MB could still be as high as 95 % with slight decrement. Additionally, the effects of pH, contact time , temperature and initial dye concentration on the adsorption performance of MB were systematically examined. Furthermore, the adsorbent was characterized by FT-IR, BET and XPS analysis. In mixed anionic and cationic dyes, the adsorption selectivity of XG-Fe 3+ /AM on MB in the mixture of MB and methyl orange (MO) reached up to 99.69 %. Molecular dynamics simulation revealed that the trend of adsorption energy for dyes was in good agreement of the experimental order of adsorption capacities and molecular sizes among seven anionic and cationic dyes based on molecular matching effect and electrostatic interaction. Therefore, XG-Fe 3+ /AM is an eco-friendly, facile-synthesis and high-selectivity adsorbent, which remove cationic dyes in multi-component systems through electrostatic interaction and molecular matching effect.
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PubMed
高影响因子
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