Food Chemistry-X
·
2025
·
IF 8.2
Haozhen Li,Shuyao Wang,Xiaohua Zhang,Kangkang Song,Long Yang
Tea quality in greenhouse was certain gap with open air. Metabolites and foliar microorganisms were investigated under seaweed fertiliser (CF) and gibberellin (CH) treatments using sensory evaluation, HPLC, untargeted metabolomics, 16S rDNA, and Internal Transcribed Spacer. CF tea was mellow, less astringent, and of better quality compared to CH. Catechin, −(−)Epicatechin, and Epigallocatechin were notably lower in CF. Differentially accumulated metabolites (DAMs) were notably enriched in Flavonoid and Phenylpropanoid biosynthesis, both involved in Catechin synthesis. DAMs in these pathways appeared down-regulated in CF. The CF improved quality by down-regulating metabolites in Phenylpropanoid biosynthesis in conjunction with microbial community metabolism enriched in amino acid and secondary metabolite biosynthesis. Metabolite- microbial correlation analysis indicated that the highest correlation with phenylpropane pathway metabolites was in bacteria Variovorax and Pseudomonas , and in fungi Filobasidium . The study provides theoretical basis for regulating flavour quality of greenhouse tea.
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高影响因子
Materials Research-Ibero-american Journal of Materials
·
2025
·
IF 1.3
Shah Nouman Ali,Ahmad Adnan,Gul Rizwan M.,Kamran M. Ali,Ishaq M. Aaqib,Shakir Namra,Xu Jia-Zhuang,Li Zhong-Ming,Sağbaş Binnur
Highly crosslinked ultra-high molecular weight polyethylene (UHMWPE) with vitamin E (VE) as an antioxidant is widely used for joint implants. VE helps resist oxidation but raises concerns about reduced crosslink density and wear performance. This research hypothesized that tea polyphenols (tPPs), such as lipid-soluble epigallocatechin gallate (lsEGCG) and epigallocatechin gallate (EGCG), could prevent the usual decrease in crosslink density caused by VE, thereby enhancing wear performance. The antioxidants were blended with UHMWPE at 0.2 wt% and surface chemically crosslinked using di-cumyl peroxide. The surface properties, including crosslink density, roughness, coefficient of friction, and wear performance, were evaluated in detail. The results showed that lsEGCG and EGCG blended UHMWPE had significantly higher crosslink density compared to VE stabilized UHMWPE, which was 17% lower than virgin UHMWPE. The coefficient of friction increased after crosslinking and was higher in tPPs blended UHMWPE, indicating a highly crosslinked network structure. The wear resistance of surface crosslinked tPPs stabilized UHMWPE was significantly higher than VE-stabilized UHMWPE. Additionally, a substantial number of scratches, furrows, and flakes were observed on the surface of VE-stabilized UHMWPE compared to tPPs stabilized UHMWPE. It was concluded that tPPs are promising alternatives to VE for improving the performance and longevity of UHMWPE-based implants.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Caiyi Yang,Xinyu Li,Wei Niu,Yiming Jia,Yongqiang Peng,Cifu Huang,Xiaolu Li,Xinran Shi,Jialu Yang,Yuyue Shi,Anwei Luo
Mulberry leaf tea is favored for flavor and health benefits. However, the market products sometimes exhibit astringency, insufficient aroma, and low nutritional content due to limitations in fermentation conditions. The study investigated the effects of electron beam irradiation (EBI) on the chemical composition, sensory quality, and aroma of fermented mulberry leaf tea. Different doses of EBI were applied, and the microstructure was observed using SEM and TEM. Results showed a dose-dependent increase in Eurotium cristatum , with a significant rise at 1.2 kGy. Sensory evaluation revealed that 1.2 kGy irradiation improved color, aroma, and taste, with the highest score (8.81) in this group. Analysis of aroma compounds identified 277 upregulated compounds in the irradiated group, enhancing sweet, fruity, and mushroom flavors. 1-octen-3-ol was the main contributor to the aroma. In conclusion, EBI at 1.2 kGy effectively improved mulberry leaf tea quality, demonstrating its potential as a novel processing technology.
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Food Chemistry-X
·
2025
·
IF 8.2
Di Zhou,Xin-yu Liu,Miao-qin Xie,Hao-jie Xu,Huai-hui Yi,Da-xiang Li,Ru-yan Hou,Hui-mei Cai,Xiao-chun Wan,Daniel Granato,Chuan-yi Peng
Tanyang Congou black tea, renowned for its distinctive floral and fruity aroma, is meticulously produced using the shaking technique. However, the specific aroma profile and the key odor-active compounds responsible for this characteristic fragrance have not been fully elucidated. This study integrated sensory evaluation with molecular sensory science approaches to identify and characterize the principal odorants contributing to the tea's aroma. Sensory analysis confirmed that the prepared black tea exhibited typical high-quality attributes, with a prominent floral and fruity aroma markedly reduced in lower-grade samples. A total of 70 volatile compounds were detected, among which 29 key aroma-active compounds were identified across all three quality grades using aroma extract dilution analysis (AEDA) and gas chromatography-olfactometry-mass spectrometry (GC-O-MS). Of these, 16 volatiles exhibited high flavor dilution (FD) factors (≥8), and 11 compounds showed relative odor activity values (ROAV) greater than 1. Notably, seven compounds—( E )- β -ionone, (E)-nerolidol, geraniol, citral, linalool, hexanal, and phenylacetaldehyde—were identified as the primary contributors to the characteristic floral-fruity aroma of Tanyang Congou black tea. These findings provide comprehensive insight into the aroma profile of Tanyang Congou black tea, offering a scientific basis for quality assessment and targeted aroma modulation in tea production.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Chen Liu,Yihong Liao,Meiyi Ning,Hong Chen,Yang Yang,Qian Tang,Daiwen Chen
Instant tea powder is a convenient, shelf-stable product with growing global popularity, yet the impact of cultivar type on its composition and functionality remains underexplored. This study compared two instant green tea powders from green-leaf (ZYQ) and purple-leaf (ZY) cultivars in terms of metabolite profiles, sensory attributes, and anti-inflammatory effects. Metabolomics and sensory evaluation revealed distinct characteristics: ZYQ contained higher levels of epicatechin, proanthocyanidins, total flavonoids, etc., while ZY was enriched in anthocyanin glycosides and EGCG. ZYQ showed greater umami, sweetness, and harmony, whereas ZY exhibited stronger bitterness, astringency, and a purplish-red infusion. Both powders significantly alleviated LPS-induced inflammation in RAW 264.7 macrophages by inhibiting NF-κB and ferroptosis-related oxidative stress, reducing ROS, MDA, iron, and inflammatory mediators. ZY induced stronger upregulation of Nrf2 , Gpx4 , and Txnrd1 , indicating enhanced antioxidant defense. These findings demonstrate that cultivar selection shapes instant tea's flavour and bioactivity, with purple-leaf products offering distinctive functional advantages.
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FOOD AND BIOPRODUCTS PROCESSING
·
2019
·
IF 3.324
Liling Wang,Yifeng Zhou,Yanbin Wang,Yuchuan Qin,Bentong Liu,Minge Bai
Dihydromyricetin (DMY) is the main flavonoid present in vine tea and is also known to possess various beneficial health effects. Extractions of DMY from vine tea were investigated by ultrasonic-assisted extraction (UAE) with β-Cyclodextrin (β-CD) and ionic liquid (IL), which were the two green extraction methods attracting more attentions in recent years. Single factor and response surface methodology (RSM) were used in order to optimize the extraction conditions for obtaining maximum amount of DMY in the two approaches. The results of HPLC analysis showed that the addition of β-CD or 1-hexyl-3-methylimidazolium bromide ([HMim] Br) to the water solution had excellent effects on the extraction of DMY. In β-CD-UAE, the optimum conditions were 3.6% β-CD, ultrasonic time 8 min, liquid–solid ratio of 33 (mL/g), and ultrasonic power 360 W. Molecular docking results indicated that the ‘host-guest’ effect between β-CD and the molecule of DMY in water solution, which utilized molecular recognition and interactions through non-covalent bonding and hydrogen bonding is the main driver of the binding. And for IL-UAE, the optimal conditions were 1.25 mol/L [HMim] Br, ultrasonic time 5.5 min, liquid–solid ratio of 45 (mL/g), and ultrasonic power 240 W. Under above suitable conditions, the extraction yield of DMY can reach to about 40%; moreover, β-CD-UAE and IL-UAE can be easily applied for experimental or industrial scale in food or functional food use.
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JOURNAL OF CHROMATOGRAPHY A
·
2020
·
IF 4.049
Huixiao Duo,Xiaofen Lu,Xiaobin Nie,Licheng Wang,Shuai Wang,Xiaojing Liang,Yong Guo
Ferric oxide/carbon (Fe 2 O 3 @C) was fabricated via direct carbonization of metal-organic framework of iron (MOF-235) under argon atmosphere. The magnetic Fe 2 O 3 nanoparticles are evenly embedded in porous carbon matrix, while original morphology of MOF-235 was well-maintained. The synthesized Fe 2 O 3 @C was used as magnetic sorbent for extracting five benzoylurea insecticides (BUs). The materials exhibited excellent extraction performance, which benefited not only from the strong π-π interaction and hydrophobic interaction (π-conjugated system), but also to the abundant adsorption sites and flexible transport channel (the interconnected 3D porous structure). A three-factor-three-level Box-Behnken design (BBD) was selected to optimize three greatly influential parameters: amount of adsorbent (A), desorption time (B) and volume of desorption solvent (C) by response surface methodology. The established method coupled to HPLC-UV detection showed wide linearity with the range of 0.2–450 μg•L −1 , relatively low limits of detection (0.05–0.10 μg•L −1 ) with the relative standard deviation (RSD) ( n = 7) lower t than 5.47%. Moreover, the proposed method was successfully applied to analyze BUs in tea samples and investigate the removal effect of different washing on BUs residues from tea leaf. These results indicated that the synthesized Fe 2 O 3 @C is a promising adsorbent material for magnetic solid phase extraction of BUs at trace concentrations from tea samples.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jihao Zuo,Yitong Lin,Jiayuan Tian,Jinting Cai,Li Hao,Dongjie Liu,Qin Wang,Gengsheng Xiao,Xinhua Zhou,Hongjun Zhou
Peanut sclerotium blight is a globally widespread plant disease caused by Sclerotium rolfsii Sacc. , often leading to significant reductions in peanut crop yields. Due to its soil-borne transmission, effective control of this pathogen remains challenging. This study developed a tea tree oil (TTO) Pickering emulsion (Teb/TTO-PE 5 ) for delivering the fungicide tebuconazole (Teb) by using a covalent conjugate of sodium lignosulfonate (SLS) and deamidated zein (DA-zein) as stabilizers, with further stability enhanced by adding 0.3 wt% xanthan gum (XG), producing another TTO Pickering emulsion (Teb/XG/TTO-PE 5 ). The stability of Teb/XG/TTO-PE 5 was directly demonstrated by its ability to avoid phase separation after being stored at room temperature for 21 days. Additionally, it minimized droplet rebound and enhanced surface wetting, which facilitated efficient interfacial transfer during application. The dual active components in TTO Pickering emulsions exhibited controlled release behavior, enhancing both the targeting and control of the fungicide. Seed germination assays confirmed that the TTO Pickering emulsions did not significantly affect peanut seed germination. Pot experiments revealed that Teb/XG/TTO-PE 5 therapeutic intervention group maintained an average lesion rate of below 5 % in peanut plants infected with 21-day-old Sclerotium rolfsii Sacc. strains. The successful development of these Pickering emulsion fungicide delivery system offers an environmentally sustainable and crop-safe strategy for controlling peanut sclerotium blight.
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CHEMOSPHERE
·
2025
·
IF 8.1
Zhiwei Cao,Zibin Pan,Zuliang Chen
Acid mine drainage (AMD) is a type of wastewater characterized by elevated concentrations of heavy metals and metalloids, posing significant threats to ecosystems and human health. This study presents an eco-friendly method for in-situ synthesis of iron nanoparticles (FeNPs) in AMD using Excoecaria cochinchinensis leaves (EC) and green tea extracts (GT) as reducing/stabilizing agents, enabling simultaneous removal of heavy metals and metalloids. Results indicate that the two FeNPs (EC-FeNPs and GT-FeNPs) produced in AMD exhibited distinct structural and reactive properties. Firstly, the removal efficiencies of EC-FeNPs for As, Ni and Cd were 20.4 %, 15.31 %, and 11.62 %, respectively, while those of GT-FeNPs were 10.07 %, 11.7 % and 19.76 %, respectively. This indicates that EC-FeNPs were generally more effective than GT-FeNPs in removing heavy metals and metalloids from AMD. Secondly, EC-FeNPs (170.14 ± 3.22 nm) displayed larger particle sizes and more stable surface charges compared to GT-FeNPs (127.14 ± 1.94 nm), which could be attributed to differences in functional groups in the respective plant extracts. Thirdly, both EC and GT extracts acted as reductants and stabilizers in the synthesis of two FeNPs, with EC extracts providing a larger amount of phenolic compounds and carboxylic acids than GT extracts. Highlighted in this study is a novel approach for resource recovery and simultaneous removal of heavy metals and metalloids from AMD.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Aiping Li,Chen Wang,Yunfeng Chai,Zhiming Huang,Binbin Yao,Chengyin Lu,Miao Yu,Hongping Chen
Validamycin A (VA) and spinosyn A (SA) have been utilized as antibiotic pesticides in tea plantations for the control of pests and diseases. Both pesticides pose significant risks to human health and have been listed as key controlled new pollutants in China. So far, there have been few reports for the risk assessment of antibiotic pesticides in tea. In this study, a hydrophilic interaction liquid chromatography coupled with tandem mass spectrometry (HILIC-MS/MS) method was developed for the simultaneous detection of VA and SA residues in tea. Method validation demonstrated good accuracy and precision. During tea planting, SA and VA in tea shoots degraded fast, with the half-life of 0.36 to 0.43 days for SA and 0.72 to 0.92 days for VA. SA and VA in tea shoots degraded fast initially and then followed by a slower phase. Both SA and VA degraded rapidly during the withering and drying stages. Compared to green tea, the degradation rates of both pesticides were faster during black tea manufacturing. Transfer rates of VA and SA from tea into infusions had transfer rates of 76.7 % to 99.5 % and 1.5 % to 2.7 %, respectively. The chronic risk quotient (RQc) < 1 for both antibiotic pesticides indicated negligible consumer risk from tea.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2021
·
IF 5.279
Guotai Jian,Yongxia Jia,Jianlong Li,Xiaochen Zhou,Yinyin Liao,Guangyi Dai,Ying Zhou,Jinchi Tang,Lanting Zeng
Herbivore-induced plant volatiles (HIPVs) play an important role in insect resistance. As a common HIPV in tea plants (Camellia sinensis), β-ocimene has shown anti-insect function in other plants. However, whether β-ocimene in tea plants also provides insect resistance, and its mechanism of synthesis and emission are unknown. In this study, β-ocimene was confirmed to interfere with tea geometrid growth via signaling. Light was identified as the key factor controlling regular emission of β-ocimene induced by the wounding from tea geometrids. β-Ocimene synthase (CsBOS1) was located in plastids and catalyzed β-ocimene formation in overexpressed tobacco. CsBOS1 expression in tea leaves attacked by tea geometrids showed a day-low and night-high variation pattern, while CsABCG expression involved in volatile emission showed the opposite pattern. These two genes might regulate the regular β-ocimene emission from tea plants induced by tea geometrid attack. This study advances the understanding on HIPV emission and signaling in tea plants.
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PLANT AND SOIL
·
2014
·Vol. 382
·期 1
·103-115
·
IF 3.235
Duan Dechao,Peng Cheng,Xu Chen,Yu Mingge,Sun Lijuan,Worden Natasha,Shi Jiyan,Hu Tiandou
Background and aims Metal species in rhizosphere soil profoundly influence their mobility and phytoavailability. Clarifying the speciation transformation of heavy metals helps understand their translocation and accumulation in plants. Methods Single extraction, selective sequential extraction (SSE) and X-ray absorption near-edge structure (XANES) spectroscopy were employed to investigate the speciation transformation of lead (Pb) and its influence on metal accumulation in tea plants after the addition of tea polyphenols (TPs). Results Pb content was decreased in young leaves and stems, whereas increased in roots, after TPs were amended to soil. Both SSE and XANES analysis suggested bioavailable Pb was transformed to organically bound Pb after the addition of TPs. The increased percentage of organically bound Pb might be fixed in the cell wall of plant root through a ternary complex formed between the Pb-organic matter complex and cell wall components. Therefore, Pb translocation from roots to young tissues was decreased. Conclusions Pb phytoavailability change was driven by its speciation transformation after the addition of TPs. Combined SSE and XANES spectroscopy represent powerful tools to study metal speciation transformation in plant and soil systems.
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危险品化学品经营许可证（带存储）