Food Chemistry-X
·
2026
·
IF 9.2
Chen Liu,Chenbo Wang,Mengyang Wei,Meiyi Ning,Zhiying Xu,Shengxiang Chen,Jilai Cui,Chuankui Song,Qian Tang
Leaf tenderness influences green tea quality, yet its role in flavour formation remains unclear. This study analysed green teas from Camellia sinensis cv. ‘Chuancha No. 2’ with three tenderness levels—single bud (C1B), one-bud with one-leaf (C1B1L), and one-bud with two-leaves (C1B2L)—via sensory evaluation, chemical profiling, and GC–MS analysis. C1B showed the best appearance and a chestnut-like, refreshing aroma. C1B1L featured floral notes and a mellow, umami taste, while C1B2L was stronger and more full-bodied. C1B had higher free amino acids and lower polyphenols and caffeine; C1B1L had the highest polyphenol content. Among 97 volatiles, 11 had ROAV > 1. Five common aroma compounds, namely 1-octen-3-ol, geraniol, hexanal, benzeneacetaldehyde, and 2-pentylfuran, were identified as key contributors to the aroma profile. Geraniol, most abundant in C1B1L, shaped its floral aroma. These origins are supported by established pathways, including lipid-derived oxidation products, glycoside-released geraniol, and amino-acid-derived benzeneacetaldehyde. This study clarifies how tenderness drives flavour divergence and identifies compounds supporting sensory variation in green tea.
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高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Shengtao Zhang,Bin Li,Jieyu Zhou,Jiayi Shi,Zhongjing He,Yumin Zhao,Yan Li,Yehua Shen,Yongmin Zhang,Shaoping Wu
In this work, tea saponin (TS) which is indispensable in Camellia oleifera industry was used to synthesize a class of hydrophobic carbon dots (TS-CDs) with aggregation-induced emission (AIE) properties. A new fluorescent sensing platform based on AIE and non-modified TS-CDs for the detection of human serum albumin (HSA) and pH was developed, respectively. Interestingly, the developed platform is capable of ratiometric detecting extremely acidic pH in the range of 0.2–1.8 linearly (R 2 = 0.9959) due to protonation-deprotonation. Meanwhile, TS-CDs exhibited well stability toward HSA detection over a wide linear range (0–180 μM), long-term (48 h), and wide pH range (2–13). Furthermore, TS-CDs was utilized to localize to mitochondria and detect HSA in living cells, demonstrating its promising perspective in biosensing applications. This work may pave a novel avenue for high value-added utilization in the extraction process of extracting camellia oil for food woody oil.
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FOOD CHEMISTRY
·
2022
·
IF 9.231
Guijie Chen,Mingjia Wang,Ziqi Zeng,Minhao Xie,Weiqi Xu,Yujia Peng,Wangting Zhou,Yi Sun,Xiaoxiong Zeng,Zhonghua Liu
The purified fraction 3 of polysaccharides from Fuzhuan brick tea (FBTPS-3) could attenuate the colitis and modulate the gut microbiota. However, the relationship between anti-inflammatory effect of FBTPS-3 and the gut microbiota is still unknown. Thus, the anaerobic fermentation in vitro was used to investigate the potential mechanism. FBTPS-3 could be utilized and degraded by gut microbiota from inflammatory bowel disease (IBD) subjects. Furthermore, FBTPS-3 could modulate the composition and structure of IBD gut microbiota toward to that of healthy group. FBTPS-3 showed a superior modulated effect on IBD gut microbiota by increasing Bacteroides and decreasing Escherichia/Shigella . Furthermore, the fermentation solution rather than FBTPS-3 itself showed anti-inflammatory effects on lipopolysaccharide-treated RAW264.7 macrophages, which might be due to the metabolites such as short-chain fatty acids (SCFAs). Thus, FBTPS-3 can be expected as novel prebiotics for treatment of IBD via modulating gut microbiota, and promoting the production of SCFAs.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2021
·
IF 5.279
Yong Wang,Wanjun Gao,Yeyun Li,Yu Xiao,Wei Song,Ting Yao,Manhuan Cheng,Wenjuan Wang,Ruyan Hou
The tea shrub is grown in long-standing orchards, an environment that is suitable for persistent weed growth, which is increasingly controlled by herbicides. Therefore, there is increasing concern that tea consumers may be exposed to herbicide residues. In this study, the levels of glufosinate-ammonium (GLU), glyphosate [N-(phosphonomethyl) glycine; PMG], and its metabolite aminomethyl phosphoric acid (AMPA) were determined in tea samples by HPLC–MS/MS using several current purification methods and a new method that we developed herein. The matrix effect of our proposed method was between -27.3 and 27.7%, which was lower than that in other methods, indicating that this method effectively reduced the interference of tea matrix in the mass spectrometry process. This method was used to determine the levels of PMG, GLU, and AMPA in 780 samples, including six traditional Chinese teas (green tea, black tea, oolong tea, dark tea, white tea, and yellow tea) and a floral tea, from 14 provinces of China. Probability estimates showed that the 95th percentile risk entropy values of the three pesticide residues were far below the acceptable risk level. The risk assessment results showed that exposure to PMG, GLU, and AMPA caused by drinking tea beverages poses no significant risk to human health.
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MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 10
·1-10
·
IF 6.232
Zhen Deshuai,Shi Sisi,Gao Chan,Kang Qing,Xiao Xilin,Grimes Craig A.,Cai Qingyun
Bi, Fe, and Ti ternary co-doped ZrO 2 (BFT-ZrO 2 ) nanocomposites have been prepared by a sol-gel process and used as both adsorbent and matrix for the enrichment and determination of small molecules by surface-enhanced laser desorption/ionization time-of-flight mass spectrometry (SELDI-TOF MS). The BFT-ZrO 2 nanocomposites not only can selectively enrich a wide variety of low-mass toxic pollutants but can also be used as an excellent matrix to enhance the laser desorption/ionization efficiency with low background noise and uniform co-crystalline film. Low limits of detection (LODs) (0.1 pg mL −1 for bisphenol A (BPA), 2 pg mL −1 for tetrabromobisphenol A (TBBPA), 0.1 pg mL −1 for alizarin (AZ), 0.001 pg mL −1 for bisphenol S (BPS), 0.01 pg mL −1 for indigo blue (ID), 0.01 pg mL −1 for pentachlorophenol (PCP), 100 pg mL −1 for estradiol (E2), 0.001 pg mL −1 for cetyltrimethylammonium bromide (CTAB), 0.1 pg mL −1 for crystal violet (CV), 1 pg mL −1 for malachite green (MG), 0.01 pg mL −1 for rhodamine B (RhB), and 0.01 pg mL −1 for perfluorooctane sulfonate (PFOS) were achieved. The relative standard deviations (RSDs) of shot-to-shot are 9.4–24% and of sample-to-sample 5.2–17%. The BFT-ZrO 2 matrix was successfully applied to the determination of TBBPA and BPA in tea samples. This method shows a new strategy for determination of toxic compounds in tea.
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Food Analytical Methods
·
2020
·Vol. 14
·期 3
·616-630
·
IF 2.667
Qi Dandan,Ma Chengying,Wang Wenwen,Zhang Licui,Li Jianke
Royal jelly produced by nurse bees from tea tree (tea royal jelly) is a special bee product in China and it is popular with consumers owing to its multiple healthcare functions. However, the volatile compound profile of tea royal jelly has not been investigated. To obtain a comprehensive understanding of volatile compound profile of tea royal jelly, a method based on headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry (HS-SPME/GC-MS) and chemometric analysis was applied. Moreover, two royal jelly samples produced from pagoda tree were also investigated to reveal the difference in volatile compounds between royal jelly produced from tea tree and other plants. A total of 66 volatile compounds were identified in tea royal jelly, including 16 alkanes, 14 aldehydes, 9 alcohols, 9 ketones, 8 esters and lactones, 5 phenols, 2 organic acids, and 3 other compounds, and most of them were discovered in royal jelly for the first time. Notably, α -ionone, an important aroma compound in tea, was first identified in tea royal jelly. Moreover, the result of chemometric analysis indicates a significant difference on volatile compound profile between royal jelly produced from tea and pagoda trees. To sum up, 35 differential compounds were identified and they could well distinguish royal jelly samples. Our data offers the first characterization of volatile compound profile of tea royal jelly and significantly expands the knowledge of volatile compounds in royal jelly. It is potentially useful as a new approach to distinguish royal jelly produced from different botanical origins.
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MOLECULES
·
2020
·Vol. 25
·期 2
·380
·
IF 3.267
Shuyan Wang,Feng Zhao,Wenxi Wu,Pengjie Wang,Naixing Ye
Chinese jasmine tea is a type of flower-scented tea, which is produced by mixing green tea with theJasminum sambacflower repeatedly. Both the total amount and composition of volatiles absorbed from theJasminum sambacflower are mostly responsible for its sensory quality grade. This study aims to compare volatile organic compound (VOC) differences in authoritative jasmine tea grade samples. Automatic thermal desorption-gas-chromatography-mass spectrometry (ATD-GC-MS) and electronic nose (E-nose), followed by multivariate data analysis is conducted. Consequently, specific VOCs with a positive or negative correlation to the grades are screened out. Partial least squares-discriminant analysis (PLS-DA) and hierarchical cluster analysis (HCA) show a satisfactory discriminant effect on rank. It is intriguing to find that the E-nose is good at distinguishing the grade difference caused by VOC concentrations but is deficient in identifying essential aromas that attribute to the unique characteristics of excellent grade jasmine tea.Keywords:Chinese jasmine tea;tea grade;volatile organic compounds;electronic nose (E-nose);automatic thermal desorption-gas-chromatography- mass spectrometry (ATD-GC-MS);multivariate statistical analysis
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FOOD RESEARCH INTERNATIONAL
·
2023
·
IF 8.1
Yingyi Huang,Huahong Liu,Xiaohua Zhang,Yuxin Wu,Zhusheng Liu,Yuelan Pang,Renjun Liu,Chun Yang,Jinfang Nie
Long-term storage of Liupao tea (LPT) is usually believed to enhance its quality and commercial value. The non-volatile metabolites variations and the fungal succession play a key role for organoleptic qualities during the storage procedure. To gain in-depth understanding the impact of storage time on the quality of LPT, two different brands of LPT with different storage time, including Maosheng LPTs (MS) with 0, 5, 10 and 15 years and Tianyu LPTs (TY) with 0, 3, 5, 8 and 10 years, were resorted to investigate the changes of non-volatile metabolites and fungi as well as their correlation by multi-omics. A total of 154 and 119 differential metabolites were identified in these two different brands of MS and TY, respectively, with the aid of high-performance liquid chromatography with quadrupole-time-of-flight mass spectrometry. In both categories of LPTs, the transformation of differential metabolites in the various stages referred to the formation of alkaloids, increase of organic acids, biosynthesis of terpenoids as well as glycosylation and methylation of flavonoids. Thereinto, glycosylation and methylation of flavonoids were the critical stages for distinguishing MS and TY, which were discovered in MS and TY stored for about 10 and 8 years, respectively. Moreover, the results of high-throughput sequencing showed that the key fungal genera in the storage of LPTs consisted of Eurotium , Aspergillus , Blastobotrys , Talaromyces , Thermomyces and Trichomonascus . It was confirmed on the basis of multivariate analysis that the specific fungal genera promoted the transformation of metabolites, affecting the tea quality to some extent. Therefore, this study provided a theoretical basis for the process optimization of LPT storage.
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MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Xiaojiao Zheng,Weiwei Ma,Qihui Wang,Yaping Xu,Yukun Yang,Shu Qin,Xu Jing
In this study, a fast, green, and efficient ferrofluid-based dispersive liquid–liquid microextraction (DLLME) method was developed for determining chiral fungicide hexaconazole residues using high-performance liquid chromatography (HPLC). The ferrofluid as extraction solvent was composed of deep eutectic solvents (DESs) and Fe 3 O 4 , in which DES as the functional support solvent of the ferrofluid was synthesized by fenchol, hexanoic acid, and acetic acid in the molar ratio of 1:0.5:3. The prepared ferrofluid is characterized by self-dispersion and magnetism, which can eliminate the vortex, ultrasound, and centrifugation steps. Chiral separation and detection of hexaconazole enantiomers were performed by HPLC. Under optimal conditions, linearity ranged between 0.02 and 2 μg mL −1 , the limit of detection (LOD) was 0.006 μg mL −1 , and relative standard deviations were less than 8.6 %. The recoveries in the water, tea, and juice ranged from 83.0 % to 101.7 %. The proposed self-dispersion ferrofluids can facilitate the development of fast microextraction methods for pesticides in food samples.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2023
·
IF 6.1
Zhiyong Xie,Ziqi Zeng,Guijie Chen,Wei Dong,Yujia Peng,Weiqi Xu,Yi Sun,Xiaoxiong Zeng,Zhonghua Liu
The intracellular polysaccharides of Aspergillus cristatus (IPSs) from Fuzhuan brick tea have been demonstrated to improve immune function linked to modulating the gut microbiota. Herein, to further investigate the efficacy of IPSs to maintain gut homeostasis, the protection of the purified fraction of IPSs (IPSs-2) on the mice with colitis induced by dextran sulfate sodium (DSS) and the underlying mechanisms were explored in this study. The results revealed that IPSs-2 alleviated the typical symptoms of colitis and suppressed the excessive inflammatory mediators, regulating the genes related to inflammatory responses in the colon at the mRNA level. Meanwhile, IPSs-2 treatment reinforced the intestinal barrier function by ameliorating the DSS-induced histological injury, facilitating the differentiation of goblet cells to enhance Mucin-2 generation, and enhancing the expression of tight junction proteins to alleviate colitis. In addition, IPSs protected against colitis by promoting the production of short-chain fatty acids (SCFAs), the activation of SCFAs receptors, and the leverage of the gut microbiota via the enrichment of Bacteroides, Parabacteroides, Faecalibacterium, Flavonifractor_plautii, and Butyricicoccus, linking with reducing inflammation and repairing intestinal barrier function. Overall, our research revealed the therapeutic potential of IPSs-2 as a prebiotic for attenuating inflammatory bowel disease and provided a rationale for future investigation.
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Yalan Hu,Youyou Li,Yueru Shi,Yixin Kuang,Suxin Zhou,Yuan Peng,Yuefan Liu,Luyi Chen,Ningbo Zhou,Juan Zheng,Fang Zhu,Gangfeng Ouyang
Persistent organic pollutants (POPs) are widely distributed in the environment and are toxic, even at low concentrations. In this study, we first used hydrogen-bonded organic framework (HOF) to enrich POPs, based on solid phase microextraction (SPME). The HOF called PFC-1 (self-assembled by 1,3,6,8-tetra(4-carboxylphenyl)pyrene) has an ultra-high specific surface area, excellent thermochemical stability, and abundant functional groups, making it potential to be an excellent coating in SPME. And the as-prepared PFC-1 fiber have demonstrated outstanding enrichment abilities for nitroaromatic compounds (NACs) and POPs. Furthermore, the PFC-1 fiber was coupled with gas chromatography-mass spectrometry (GC–MS) to develop an ultrasensitive and practical analytical method with wide linearity (0.2–200 ng·L −1 ), low detection limits for organochlorine pesticides (OCPs) (0.070–0.082 ng·L −1 ) and polychlorinated biphenyls (PCBs) (0.030–0.084 ng·L −1 ), good repeatability (6.7–9.9%), and satisfactory reproducibility (4.1–8.2%). Trace concentrations of OCPs and PCBs in drinking water, tea beverage, and tea were also determined precisely with the proposed analytical method.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2019
·
IF 3.571
Hui Ma,Bowei Zhang,Yaozhong Hu,Jin Wang,Jingmin Liu,Renbing Qin,Shiwen Lv,Shuo Wang
Tea polyphenols (TP) possess the ability to regulate dyslipidemia and gut microbiota dysbiosis. However, the underlying mechanism is still elusive. The present study explored the intervention of TP on high fat diet induced metabolic disorders, gut microbiota dysbiosis in mice, and the underlying intestinal mechanism. As a result, TP significantly ameliorated hyperlipidemia, improved the expression levels of hepatic lipid metabolism genes, and modulated gut microbiota. The underlying mechanism was supposed to rely on the maintaining of intestinal redox state by TP. Intestinal redox related indicators were significantly correlated with the distribution of gut microbiota. An unidentified genus of Lachnospiraceae, Bacteroides, Alistipes, and Faecalibaculum were identified as the biomarkers for intestinal redox state. Importantly, different dosages of TP modulated intestinal redox state and gut microbiota in varied patterns, and an overdose intake attenuated the beneficial effects on gut health. Our findings offered novel insights into the mechanism of TP on intestinal homeostasis.
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