FOOD CHEMISTRY
·
2025
·
IF 9.8
Jialu Zhang,Yu Fu,Peng Chen,Bowen Liu,Cuiling Ren
Salicylaldehyde is a significant fine chemical product utilized in the flavoring of various foods, excessive intake of salicylaldehyde is detrimental to human health. Its accurate quantitative detection holds considerable importance. Compared with “turn-off” probes, the “turn-on”one allow for more sensitive detection. New silicon nanoparticles (D-SiNPs) which can be used to detect salicylaldehyde by “turn-on” mode were prepared in this work. This D-SiNPs demonstrates highly stability, selectivity and sensitivity. Within the concentration range of 5–50 μM, salicylaldehyde concentration exhibits a strong linear relationship with fluorescence intensity, the limit of detection is calculated to be 0.97 μM. It can be applied to detect salicylaldehyde in baked goods and beverages, achieving good recoveries. These results are highly satisfactory. The detect mechanism was investigated systemetically, the results illustrates this detection is based on Schiff reaction between the amino groups of silicon nanoparticles and aldehyde group of salicylaldehyde, which satisfies the ESIPT mechanism.
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高影响因子
Foods
·
2025
·Vol. 14
·期 24
·4272
·
IF 5.1
Mengqi Wang,Yi Zhang,Yunqi Gao,Huanyu Zheng,Mingming Zheng
Ethyl butyrate is a typical flavor ester with pineapple-banana scents, but the poor yield from natural fruits limits its feasibility in food and fragrance industries. In this study, dendritic fibrous nano-silica (DFNS) was hydrophobically modified with octyl groups (DFNS-C 8 ) to immobilize Candida antarctica lipase B (CALB) for solvent-free esterification of ethyl butyrate. The immobilized lipase CALB@DFNS-C 8 , with the enzyme loading of 354.6 mg/g and the enzyme activity of 0.064 U/mg protein, achieved 96.0% ethyl butyrate conversion under the optimum reaction conditions where the molar ratio of butyric acid to ethanol was 1:3, with a reaction temperature and time of 40 °C and 4 h. Under the solvent-free catalytic reactions, CALB@DFNS-C 8 presented the maximum catalytic efficiency of 35.1 mmol/g/h and retained 89% initial activity after ten reuse cycles. In addition, the immobilized lipase can efficiently catalyze the synthesis of various flavor esters (such as butyl acetate, hexyl acetate, butyl butyrate, etc.) and exhibits excellent thermostability and solvent tolerance. A molecular docking simulation reveals that the hydrophobic cavity around the catalytic triad stabilizes the acyl intermediate and ensures the precise orientation of both acid and alcohol substrates. This work provides new insights into the sustainable production of flavor esters using highly active and recyclable immobilized lipases through rational carrier hydrophobization and structural confinement design.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2025
·
IF 6.2
Mengzhen Jia,Xinyu Hu,Fangjie Ning,Kexin Geng,Tian Yuan,Zhigang Liu
Low-fiber diet poses a health risk, yet mechanisms linking dietary fiber deprivation to emotional disorders are unclear. Here, we demonstrate that dietary fiber deprivation (FD) induces pronounced anxiety-like behaviors in mice by disrupting the gut-brain axis. In the FD model, a 6-week intervention with mannan oligosaccharides (MOS, 500 mg/kg) ameliorated these deficits. Mechanistically, FD disrupted gut microbiota and impaired gut barrier integrity. FD triggered colonic inflammation, oxidative stress, and inhibited mitochondrial oxidative phosphorylation─a critical aspect of colonic energy metabolism. These intestinal insults were associated with hyperactivation of the HPA axis and neuroinflammation in the brain. MOS reversed these effects by reshaping the gut microbiota, promoting short-chain fatty acids (SCFAs), and restoring colonic energy homeostasis. Colonic energy metabolism is a critical node in the gut-brain axis, linking fiber intake to emotional regulation. Therefore, dietary fiber deprivation affects the HPA axis and emotions, making it an important nutritional intervention target.
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高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Xiaojiao Zheng,Yulin Wang,Hongli Zhang,Qingrong Peng,Xianzhao Zhang,Xu Jing,Fanrong Zhao,Jiajun Han
A green, rapid, and efficient homogeneous liquid–liquid microextraction technique involving the use of bio-based solvent 2-methyltetrahydrofuran was developed to extract deltamethrin, beta-cypermethrin, and bifenthrin from medicine–food homology tea samples, including mint-, ginger-, cinnamon- and chrysanthemum-based tea. Various solvents were screened via a conductor-like screening model, and three superior solvents were optimised and validated. 2-Methyltetrahydrofuran was selected as the extractant and added to the sample, and phase separation was induced with ammonium sulfate, achieving extraction in under 1 min without centrifugation. Mechanistic studies using density functional theory calculations and molecular docking revealed that van der Waals forces and hydrogen bonds dominate the interactions. The method exhibited excellent linearity within the range of 0.005–0.5 μg mL −1 and recoveries between 80.6 % and 109.8 %. The environmental sustainability of the entire process was verified. These results emphasise the methold's potential for applications in the trace analysis of pesticides in diverse food matrices .
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高影响因子
Journal of Environmental Sciences
·
2025
·
IF 6.3
Qingmuke Su,Yaguang Du,Dongyun Du,Tian C. Zhang
Ciprofloxacin (CIP), as a quinolone antibiotic, has broad-spectrum antibacterial properties and can affect methanogenic performance in anaerobic digestion (AD). While previous studies focused on synthetic wastewater, the fate of CIP in real distillery wastewater (RDW) and its impact on microbial adaptation mechanisms remain unclear (such as biotransformation pathways, population dynamics, and the enzymes involved) in RDW is largely unclear. In this study, we investigated AD performance, metabolic pathways, and antibiotic resistance gene (ARG) dynamics using real wastewater spiked with CIP (0.3–2 mg/L). Results indicate that 0.5 mg/L CIP (631.83 mL CH 4 /g·VS) enhanced the methane yield by 6.67 % (592.34 mL CH 4 /g·VS in control), correlating with upregulated enzyme in glycosis, TCA cycle, and methanogenesis (F 420 increased). With full use of short-chain acids, transient volatile fatty acid (VFA) inhibition (≤ 50 mg/L on Day 3) was overcome by Day 10. Metagenomics revealed CIP promoted the production of stress proteins (e.g., cysteine synthase activity doubled). Furthermore, CIP (0.3–1 mg/L) suppressed mobile genetic elements (MGEs) encoding horizontal gene transfer, including isfinder (15.15 %) and integrases (6.25 %), while ARG and virulence factor abundances remained unchanged versus control. This study firstly shows that low-dose CIP in RDW increases methanogenesis via metabolic adaptation without exacerbating ARG risks. MGE suppression implies that CIP may lessen the possibility of ARG diffusion in AD systems. These results offer vital information for improving AD performance in the treatment of wastewater contaminated by antibiotics and developing methods to strike a balance between antibiotic removal and ARG control.
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高影响因子
危险品化学品经营许可证（带存储）