FOOD RESEARCH INTERNATIONAL
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2025
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IF 8
Fang Wei,Liyong Luo,Fanwei Sun,Bowen Zhang,Jie Yang,Yan Liu,Liang Zeng
Camellia nanchuanica (NC) black tea has garnered attention for it's appealing sweet taste and aroma . Previously, phloridzin was identified as the key sweet taste compound in NC black tea. To investigate the aroma characteristic of NC black tea, a flavor wheel containing 54 flavor attributes, was developed using 30 samples of NC black tea. Sweet aroma was identified the most prominent characteristic aroma attribute of NC black tea. To further reveal the key sweet aroma compounds, 112 volatile compounds were totally detected using gas chromatography–mass spectrometry. Among them, β -ionone, linalool, phenylacetaldehyde, octanal, and geraniol were the potential key sweet aroma compounds in NC black tea because their relative odorant activity values and odorant activity values were exceeded 1. Notably, when β -ionone, linalool, and geraniol concentrations were 47.17–94.35, 168.02–336.03, 376.79–753.58 μg/L primarily with floral and sweet aroma, significantly enhanced the sweet aroma of NC black tea. Generally, our work not only revealed the flavor characteristics of NC black tea but analyzed its key sweet aroma compounds, which provided a theoretical basis for improving its higher sweet aroma.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Zhenzhen Wu,Lin Wang,Zhiwen Hu,Xiuqing Guan,Yibin Chen,Mingming Xu,Xianrui Chen,Nitong Bu,Jie Duan,Wei Liu,Chen Ma,Jie Pang
With increasing global environmental awareness and concerns about food safety, biodegradable active packaging has garnered widespread attention. In this study, the stability and bioactivity of tea polyphenol (TP) were enhanced through the preparation of TP–ferric nanoparticles (TP–Fe NPs) using metal–polyphenol ion coordination. Moreover, the introduction of Fe ions can further enhance the antibacterial effects of TP–Fe NPs. Using the hydrogen bonding between konjac glucomannan (KGM) and zein to enhance the hydrophobicity and mechanical properties of the film. By employing KGM and zein as the matrix, we incorporated TP–Fe NPs as active fillers to create multifunctional active packaging films. This study aimed to meet the needs of food safety and sustainable development goals. The resulting film exhibited excellent water resistance (water contact angle: 117.73°), mechanical strength (tensile strength: 21.82 MPa, elongation at break: 94.30 %), ultraviolet-shielding ability (>99 %), biodegradability (5 days in soil), and antioxidant (>85 %) and antibacterial (>99 %) properties. Moreover, the film significantly reduced strawberry decay and extended its shelf life by 10 days. These findings provide new insights into the application of nanomaterials in active packaging, highlighting their potential and advantages in food preservation.
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PLANT PHYSIOLOGY AND BIOCHEMISTRY
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2025
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IF 5.7
Abdelkader Bassiony,Shujuan Sun,Kangni Yan,Qunhua Peng,Mengxue Zhou,Jianyu Fu,Susanne Baldermann,Jiang Shi,Haipeng Lv,Zhi Lin
Drought stress (DS) significantly hampers the growth and productivity of tea plants, necessitating effective strategies to enhance their resilience. This study comprehensively investigated the mechanisms of carbonyl volatiles-methyl jasmonate (MeJA) and cis-3-hexenyl acetate ( cis -3-HAC) and signal peptide CLAVATA3/EMBRYO-SURROUNDING REGION-RELATED 25 (CLE25) promotion DS resistance using integrative metabolomics and proteomics strategy. Total pigment content decreased, while soluble sugar and proteins increased significantly under DS and further increased after foliar inducement of CLE25, MeJA, and cis -3-HAC. Gallated catechins and amino acids exhibited apparent decreased under DS, especially EGCG (24.6–13.4 mg g −1 ) and theanine (10.66–3.78 mg g −1 ), but significantly mitigated by CLE25 inducement. Antioxidant enzymes activity, such as catalase (CAT), jumped from 23.1 to 48.2 and further boosted to 118.8 Ug −1 min −1 FW with CLE25. Proteomic analysis revealed massive increased in stress tolerance proteins, particularly dehydrins and heat shock proteins, rising by >50.0 % with CLE25 inducement and the expression levels of peroxidase (POX), superoxide dismutase (SOD), α-galactosidase (α-GAL), carboxypeptidases (CPs), and transaldolase (TAL) exhibited higher after inducement. Furthermore, stress signaling-related proteins were in-depth explored, especially thioredoxin proteins; sucrose non-fermenting 1-related protein kinase 2 (SnRK2) was novelly verified in activating abscisic acid (ABA) responding. Differences among drought resistance mechanisms after carbonyl volatile and CLE25 treatments were comprehensively studied. The integration of metabolite and protein levels provided a comprehensive illustration of tea DS tolerance mechanisms and offered promising promotion strategies through foliar application of MeJA, cis -3-HAC, and CLE25.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Yu Sun,Jia-Xiang Yang,Xu Zhang,Yun Liu
Viscose fabrics are characterized as good moisture absorption and dyeability, but the disadvantage of being extremely flammable limits the application of viscose fabrics. In this paper, tea polyphenols (TPs), amino trimethylphosphonic acid (ATMP) and urea were used to synthesize a semi-durable and efficient flame retardant, TBP. The limiting oxygen index (LOI) of Viscose/TBP was 44.2 %, and peak heat release rate was decreased by 91.5 %, indicating the fire risk of viscose fabrics was reduced. Viscose/TBP200-20Ls can pass the vertical flame test after 20 laundering cycles (Ls), and LOI reached 27.0 %. TBP did not cause damage to the mechanical properties of treated viscose fabrics. The transmittance of Viscose/TBP showed a significant reduction compared with those of viscose fabrics in ultraviolet-A and ultraviolet-B region, and its ultraviolet protection factor value reached 86.1 which was better for anti-ultraviolet properties. In a word, Viscose/TBP with anti-ultraviolet properties and flame retardancy was successfully prepared. Meanwhile, flame-retardant viscose fabrics' tensile strength was not decreased.
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Journal of Environmental Chemical Engineering
·
2024
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IF 7.4
Fangcong Lin,Leiping Wang,Xiaorong Dai,Zun Man,Yang Meng,Dongtao Chu,Yuting Yang,Wei Wang,Hang Xiao,Kaiying Wang
Effective treatment of hydrogen sulfide (H 2 S) is crucial for minimizing nuisance odors from intensive livestock and poultry operations. The development of high-performance desulfurizers holds practical significance in this context. Herein, a novel CuO-CaCO 3 co-impregnated biochar desulfurizer (Cu x Ca y /BC T ) was synthesized by impregnation-pyrolysis method, using waste tea stalks and metal salts as raw materials, and it is intended for the treatment of H 2 S at room temperature. The optimized Cu 0.75 Ca 0.25 /BC 800 shows an excellent H 2 S removal capacity of 182.67 mg/g, which is 31 times and 5.6 times that of inactivated biochar (BC 800 ) and copper-oxide-impregnated biochar (Cu 0.75 /BC 800 ). The desulfurization mechanism of Cu 0.75 Ca 0.25 /BC 800 involves synergistic effect of reactive adsorption and catalytic oxidation . CaCO 3 ’s alkaline adsorption sites and copper-mediated activation of superoxide radicals (∙O 2 - ) were critical in this reaction. Besides, Cu 0.75 Ca 0.25 /BC 800 demonstrated excellent reusability, retaining approximately 85 % of its initial H 2 S removal capacity after seven cycles of desulfurization and regeneration. This study aims to develop a metal oxide- and carbonate-impregnated biochar-based desulfurizer, with the goal of advancing the technology for catalytic removal of H 2 S in a more environmentally friendly and effective manner.
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FOOD CHEMISTRY
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2024
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IF 8.5
Jinping Zhou,Laifeng Chen,Hooi Ling Foo,Zhenhui Cao,Qiuye Lin
The present study aimed to determine microbial community , short-chain fatty acids (SCFAs), and volatilome of Bulang pickled tea during fermentation. Sequencing of 16S rRNA and ITS revealed that Bualng pickled tea was dominated by Lactobacillus plantarum , unclassified Enterobacteriaceae , unclassified Debaryomyces , Candida metapsilosis, Cladosporium sphaerospermum , and unclassified Aspergillus . The overall contents of SCFAs increased, with acetic acid showing the highest content. A total of 398 differential volatile metabolites were detected using differential metabolomics analysis. Out of these different volatile compounds , ten key volatile compounds including (Z)-4-heptenal, 1-(2-thienyl)-ethanone, 5-methyl-(E)-2-hepten-4-one, 2-ethoxy-3-methylpyrazine, p-cresol, 2-methoxy-phenol, ethy-4-methylvalerate, 3-ethyl-phenol, p-menthene-8-thiol, and 2-s-butyl-3-methoxypyrazinewere were screened based on odor activity value (OAV). The Spearman correlation analysis showed a high correlation of SCFAs and volatile compounds with microorganisms, especially L. plantarum and C. sphaerospermum . This study provided a theoretical basis for elucidating the flavor quality formation mechanism of Bulang pickled tea.
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Materials Today Bio
·
2024
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IF 8.7
Min Wang,Aoling Yu,Wen Han,Jingyi Chen,Chunhua Lu,Xiankun Tu
Ferroptosis, a newly discovered form of regulated cell death, has garnered significant attention in the field of tumor therapy. However, the presence of overexpressed glutathione (GSH) and insufficient levels of H 2 O 2 in the tumor microenvironment (TME) hinders the occurrence of ferroptosis. In response to these challenges, here we have constructed the self-assembled nanocomplexes (FeE NPs) utilizing epigallocatechin-3-gallate (EGCG) from green tea polyphenols and metal ions (Fe 3+ ) as components. After grafting PEG, the nanocomplexes (FeE@PEG NPs) exhibit good biocompatibility and synergistically enhanced tumor-inhibitory properties. FeE@PEG NPs can be disassembled by H 2 O 2 in the TME, leading to the rapid release of Fe 3+ and EGCG. The released Fe 3+ produces large amounts of toxic •OH by the Fenton reactions while having minimal impact on normal cells. The generated •OH effectively induces lipid peroxidation, which leads to ferroptosis in tumor cells. Meanwhile, the released EGCG can autoxidize to produce H 2 O 2 , which further promotes the production of •OH radicals and increases lipid peroxide levels. Moreover, EGCG also depletes the high levels of intracellular GSH, leading to an intracellular redox imbalance and triggering ferroptosis. This study provides new insights into advancing anticancer ferroptosis through rational material design, offering promising avenues for future research.
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FOOD CHEMISTRY
·
2024
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IF 8.5
Renliang Zhao,Hengbin Yao,Ziyan Hou,Qiongqiong Zhou,Mengyao Zhao,Chunlai Wu,Lipan Zhang,Chao Xu,Hui Su
Fu Brick Tea (FBT) is characterized by Fungus Aroma (FA), which determines the quality of FBT products. However, the aroma constituents and their interactive mechanism for FA remain unclear. In this study, the FBT sample with the optimal FA characteristics was selected from 29 FBTs. Then, 19 components with OAV ≥ 1 were identified as the odorants involved in the FA formation. The aroma recombination test suggested that the FA was potentially produced by the synergistic interplay among the 15 key odorants, including ( E,E )-2,4-heptadienal, ( E,E )-2,4-nonadienal, ( E )-2-nonenal, ( E,Z )-2,6-nonadienal, ( E )-2-octenal, ( E )- β -ionone, 4-ketoisophorone, dihydroactinidiolide, ( E )- β -damascenone, 1-octen-3-ol, linalool, geraniol, heptanal, hexanal, and phenylacetaldehyde. And, the synergistic effects between them were preliminarily studied by aroma omissions, such as modulatory effects, masking effects, compensatory effects, and novelty effects, ultimately contributing to the FA. In all, this work helps us better understand the formation of the FA and provides a basis for the improvement of FBT production technology.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Liya Fan,Xiaoxuan Xi,Xiaoyan Zhao,Xiao Zhu
The method of adding additives at once not only increases costs, but also poses a risk of excessive consumption. Therefore, the slow-release technology was employed for improving the utilization efficiency and edible safety of additives in this work. The poly (N-isopropylacrylamide) (PNIPAM) and polylactic acid (PLA) composite hydrogels with sheath-core structure were fabricated by in-situ spinning method. The mechanical bearing capacity of PNIPAM hydrogel was improved by controlling the structure of PLA electrospun fiber membrane. The results showed that the compression resistance of the samples coated with PLA was increased 931 % at 50 % deformation. In addition, the surface wettability of samples was studied to ensure the stable water permeability. The composite hydrogel was used for the sustained release of tea polyphenol (TP) antioxidant. The release effect of TP at different temperatures, and radical scavenging effect of 2, 2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and 2-Phenyl-4,4,5,5-tetraMethyliMidazoline-3-oxide-1-oxyl) (PTIO) were investigated. It was found that the release rate for TP could reach to 77.8 % at 30 °C. The radical clearance rates of ABTS and PTIO were 99.2 % and 46.6 %, respectively. This work provides effective ideas for the use of antioxidants in food preservation processes.
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FOOD RESEARCH INTERNATIONAL
·
2025
·
IF 8
Die Dong,Tenglong Geng,Lidan Pan,Xiaorui Liu,Chenxi Yu,Chao Yuan,Li Guo,Meng Zhao,Bo Cui
In this study, covalent octenyl succinic anhydride starch-soy protein- (−)-Epigallocatechin-3-gallate (OSAS-SP-EGCG) complexes were synthesized by H 2 O 2 / ascorbic acid radical grafting method. Particle size, ζ-potential, Fourier transform infrared, and thermogravimetric results proved the formation of covalent OSAS-SP-EGCG complexes. The results of scanning electron microscopy and atomic force microscopy confirmed that the particles of the covalent complexes (especially 1:4 complexes) were more uniformly distributed. Compared with single OSAS, the covalent complexes exhibited excellent antioxidant capacity (>70 %). Static/dynamic contact angle, dynamic interfacial tension and quartz crystal microbalance were used to characterize the interfacial properties of the samples. Results showed that the stronger hydrophobicity of the complexes resulted in lower interfacial tension, which was stabilized at 17 mN/m after 45 min. Among the complexes, 1:4 complexes showed the most visible interfacial properties, with the initial and equilibrium surface values increasing by 12.1 % and 24.3 %, respectively. Moreover, the saturated f displacement of 1:4 complexes reached 50.45 Hz. It was indicated that better interfacial adsorption capacity of the complexes allowed them to adsorb more quickly to the oil-water interface and form thicker and denser interfacial films. This work provides a promising avenue for improving the interfacial properties of covalent polysaccharide-protein-polyphenol complexes.
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Journal of Materials Chemistry A
·
2025
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IF 9.5
Shuwen Zhu,Huiqing Fan,Yuxin Jia,Yongbo Fan,Weijia Wang
Due to the unique properties of heterojunction interfaces, heterojunction materials have broad application prospects in gas sensors. In this study, we synthesized In2O3 microrods through direct calcination of MIL-68(In) at ambient condition. Subsequently, WO3/In2O3 n-n heterojunction composites were built via a solvothermal method. The sensors fabricated with this heterojunction demonstrated exceptional TEA sensing capabilities, such as excellent selectivity and stability, a high response value of 678.43 to 20 ppm TEA, a fast response time (11 s) and a low operating temperature of 160°C. The increased sensing performance is attributed to the improved specific surface area, distinct barrier-controlled electron transport present in n-n type heterojunctions, and the unique selectivity of WO3 to TEA. This work not only offers a strategy for creating heterojunction-rich sensing materials, but also an efficient way for TEA detection.
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ACS Applied Polymer Materials
·
2025
·
IF 4.7
Jin Han,Fang Chen,Weipeng Qin,Lei Wang,Dan Wu,Kun Shen,Xiaoxue Yin,Qingquan Xue
The practical application of tea tree oil (TTO) as a natural broad-spectrum antimicrobial agent is limited by high volatility, chemical instability, and compatibility challenges with conventional polymer matrices. In this study, an antimicrobial thermosetting system with controlled hydrolysis was constructed. The N,N,N′,N″,N″-pentamethyldipropylenetriamine (PMD) cured samples exhibited superior mechanical and thermal properties in comparison to the N,N,N′,N′-tetramethyl-1,6-hexanediamine (TMHDA) or N,N,N′,N′-tetramethyl-1,3-propanediamine (TMPDA) cured samples. The TTO-loaded β-cyclodextrin (β-CD) was cross-linked by a rapid quaternization reaction to give the thermoset with quaternary ammonium contact-mode antimicrobial and TTO pharmaceutical antimicrobial properties. The remaining tertiary amine groups in the system provide a weakly alkaline environment, while the quaternary ammonium ester (Quat Ester) groups undergo weak base accelerated hydrolysis. The tensile strength of the cured system reached 23.69 MPa, and the antimicrobial activity against Escherichia coli and Staphylococcus aureus reached 95.27 and 95.63%, respectively; the antimicrobial performance could be further enhanced when long-chain cetyl chloroacetate (CCA) was involved in the curing (the antimicrobial activity reached 98.33 and 98.07%, respectively). The antimicrobial and pH-responsive degradation properties provide ideas for the development of degradable and antimicrobial materials for three-dimensional (3D) printing, solid disinfectants and so on.
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