COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Yuan Zhao,Tao Chen,Tian Liang,Ya-yang Tian,Lin-feng Chen,Bing Li,Jie Gao
The excessive discharge of Cr(VI) not only causes severe environmental pollution but also poses significant ecological risks. Thus, it is an urgent human demand and scientific challenge to use renewable biomass to prepare adsorbent in an eco-friendly and efficient way, effectively remove Cr(VI) pollutants, and achieve sustainable development. Herein, loofah, a cheap, strong toughness and 3D network structure, was selected as the substrate. Glycidyl methacrylate (GMA) was grafted onto the surface of loofah via electron beam radiation. Subsequently, two aminated loofah-based adsorbents, PLGD and PLGP, were synthesized through a ring-opening reaction with diethylenetriamine (DETA) and polyethyleneimine (PEI), respectively, followed by protonation. At 318.15 K, the maximum adsorption capacities of PLGD and PLGP for Cr(VI) were determined to be 162.04 and 94.12 mg/g, respectively. The adsorption behavior of Cr(VI) by PLGD and PLGP followed the Langmuir isotherm model and pseudo-second-order (PSO) kinetic model. The pHpzc values of PLGD and PLGP were 6.5 and 9.7, respectively. The potential mechanisms for Cr(VI) removal included electrostatic interactions, ion exchange, surface functional group complexation and reduction. This study provided a strategic approach for utilizing agricultural and forestry waste to develop functional adsorbents for the efficient removal of Cr(VI), and further enhanced the application potential of low-toxicity and cost-effective biosorbents in the elimination of heavy metal pollutants.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Food and Bioprocess Technology
·
2019
·Vol. 12
·期 9
·1537-1547
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IF 3.032
Yang Zhikun,Zou Xiaobo,Li Zhihua,Huang Xiaowei,Zhai Xiaodong,Zhang Wen,Shi Jiyong,Tahir Haroon Elrasheid
The present work aimed at evaluating the efficacy of gum Arabic–based edible coating enriched with red and white roselle extracts, on the postharvest quality of blueberry fruits during storage at 4 ± 0.5 °C. Physicochemical, phytochemicals, antioxidant capability, decay percent, and microbiological analyses of coated and uncoated blueberries were performed. The change rates of polyphenol oxidase (PPO) and guaiacol peroxidase (POD) activity were also measured. The coatings (gum Arabic with or without roselle extract) inhibited the growth of microbes (yeast and mesophilic aerobic bacteria) and enzyme activities (POD and PPO) of blueberries, reduced the degradation of anthocyanins and total phenolic as well as the weight loss and decay, and improved the firmness of blueberries. In comparison with gum Arabic coating, the gum Arabic enriched with roselle extract coating showed better performance on reducing microbes, enzyme activities, and anthocyanins degradation while enhancing the total phenolic content and decreasing the decay percentage. No significant differences were observed between the coated and uncoated blueberries in terms of their antioxidant capacities and pH values ( p > 0.05). In conclusion, the combination of gum Arabic and roselle extract as edible coating materials can be used to conserve the quality of blueberry.
研究领域:
食品科学
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植物生理学
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产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
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2025
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IF 4
Wen Hou,Ya-Qi Zhu,Yue-Jiao Yang,Qiong-Wei Yu
Loofah sponges (LS) were simply treated by alkaline solution and then used as solid-phase extraction (SPE) adsorbent to extract bisphenols from environmental water samples for the first time. As naturally material, LS exhibited an excellent adsorption performance for bisphenol compounds due to their particular functional groups such as hydroxyl, carboxyl, amino, and other active groups. Key extraction conditions were optimized, including adsorbent amount, washing solvent volume, sample pH, ionic strength, sample loading flow rate, eluent type, and elution solvent volume. Under the optimal extraction conditions (200 mg adsorbent amount and 5.0 mL eluent volume), a method was developed for analyzing five bisphenols in environmental waters by combining LS-based SPE with high-performance liquid chromatography-fluorescence detection (HPLC-FLD). This analytical method showed excellent linearity within BP concentration range of 0.5-500 ng/mL and low detection limits (0.077-0.225 ng/mL). The recoveries of five bisphenols ranged from 78.6 % to 112 % with inter-day and inter-day precision less than 5.1 %. This method was successfully applied to the analysis of bisphenols in water samples with various water sources including river, lake, tap water, bottled water, and barrelled water. The proposed analytical method is low-cost, efficient, and sensitive, offering an alternative strategy for monitoring bisphenols in enviromental water.
研究领域:
环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SEPARATION SCIENCE
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2021
·Vol. 44
·期 20
·3777-3788
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IF 3.645
Ping Zhang,Zeli Chun,Qiju Shao,Lidan Fu,Yipan Luo,Ding Gu,Rongxiang Chen
A combinative method using high-performance liquid chromatography-electrochemical detection for fingerprinting and quantitative analysis was developed and successfully applied for the quality evaluation of Lophatherum gracile Brongn leaves collected from 21 geographical locations in China. In the fingerprint analysis, 18 common peaks were observed among the 21 samples, and 10 peaks were identified. Simultaneous quantification of the 10 components was conducted to interpret the variations in these compounds among the L. gracile Brongn leaves originating from different geographical locations. The correlation between the chromatograms and the antioxidant activities of the samples was further studied. The results indicated a linear correlation between the antioxidant activity and the total common peak areas of the fingerprints obtained by high-performance liquid chromatography-electrochemical detection. Importantly, it was found that high-performance liquid chromatography-electrochemical detection fingerprinting can not only determine the quantities of individual components present in such samples but also evaluate the antioxidant activities of the samples. The developed method is a valuable reference for the further study and development of L. gracile Brongn.
研究领域:
植物化学
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药理学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Quality and Safety
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2021
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IF 3.102
Xie Jiahong,Cui Haoxin,Xu Yang,Xie Lianghua,Chen Wei
ObjectivesThis study was conducted to investigate the xanthine oxidase (XO) inhibitory activities of 18 monomeric anthocyanins from berry fruits and roselle, and to illustrate the underlying mechanism of the most active anthocyanin delphinidin-3-O-sambubioside.Materials and MethodsEighteen monomeric anthocyanins were prepared and purified in our laboratory. The inhibitory properties of anthocyanins were investigated by in vitro inhibitory activity studies and fluorescence quenching studies; the inhibitory mechanism was explored through kinetic studies, fluorescence quenching studies, circular dichroism analysis and computational docking simulations.ResultsXO inhibitory activities of anthocyanins were related to the structures of B rings and glycosides. Among all the tested anthocyanins, delphinidin-3-O-sambubioside showed the most potent inhibitory activity with an IC50 of 17.1 μM, which was comparable to the positive control allopurinol. Spectroscopic results revealed that delphinidin-3-O-sambubioside could spontaneously interact with XO and induce conformational changes. Computational docking study indicated that delphinidin-3-O-sambubioside could bind to XO with a proper orientation, stably formed π–π interactions and hydrogen bonds with key residues, thus preventing the substrate from entering the active pocket.ConclusionsIn brief, our study identified delphinidin-3-O-sambubioside as a potent XO inhibitor from natural anthocyanins, which is potentially applicable for prevention and treatment of hyperuricemia.
研究领域:
药理学
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生物化学
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天然产物化学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Dan Yang,Xin-yu-yao Ding,Hai-Xia Xu,Yu-Xian Guo,Qing-Feng Zhang
Roselle is rich in an extensive diversity of beneficial substances, including phenolic acids, amino acids, anthocyanins, vitamins, and flavonoids. Herein, the chemical constituents in Roselle extract (RE) were identified by UPLC-DAD-QTOF-MS. Besides, its inhibitory effects on three digestive enzymes, i.e. α-amylase, α-glucosidase, and pancreatic lipase, were investigated in both in vitro and in vivo . Thirty-three constituents including hibiscus acid, 18 phenolic acids, 2 anthocyanins and 12 flavonoids were identified. The anthocyanins content in RE was 21.44 ± 0.68 %, while the contents of chlorogenic acids, rutin and quercetin were 17.76 ± 2.28 %, 0.31 ± 0.01 % and 0.32 ± 0.01 %, respectively. RE inhibited pancreatic lipase in a non-competitive way with an IC 50 value of 0.84 mg/mL. Besides, it demonstrated a mixed-type inhibition on both α-glucosidase and α-amylase with IC 50 values of 0.59 mg/mL and 1.93 mg/mL, respectively. Fluorescence quenching assays confirmed the binding of RE to the enzyme proteins. Furthermore, rats pre-treated with RE at doses of 50 and 100 mg/kg body weight (bwt) exhibited significant reductions in fat absorption and improvements in fat excretion through feces. Additionally, the in vivo study revealed that RE was effective in suppressing the increase of blood glucose after starch consumption, while its effects on maltose and sucrose consumption were relatively weak.
研究领域:
药理学
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营养学
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生物化学
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食品科学
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产品关联
DOI
PubMed
高影响因子
Journal of Food Measurement and Characterization
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2018
·Vol. 12
·期 4
·2475-2483
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IF 1.181
Zhang Yao,Sang Jie,Chen Fang-fang,Sang Jun,Li Cui-qin
This study aimed to develop a green approach for extraction and determination of anthocyanins from Hibiscus sabdariffa calyx using a hydroxypropyl- β -cyclodextrin (HP β -CD)-assisted extraction technique coupled with HPLC-DAD analysis and to investigate the effects of gallic/ferulic/caffeic acids on the stability of H. sabdariffa anthocyanins in beverages. HP β -CD-assisted extraction of total anthocyanins from H. sabdariffa calyx was optimized using a Box–Behnken design-response surface methodology, and extraction at 54 °C for 53 min using HP β -CD aqueous solution (3.7 g/100 mL) gave the maximum extraction yield of total anthocyanins (4.82 ± 0.13 mg/g). A work-safe and rapid HPLC-DAD method was developed for analysing H. sabdariffa anthocyanins using ethanol and a tartaric acid aqueous solution as mobile phases, and the main anthocyanin peaks were determined as delphinidin-3- O -sambubioside and cyanidin-3- O -sambubioside using a two-dimensional HPLC-DAD/ESI-MS method. Method validation showed that the developed method was accurate, stable and reliable for the analysis of H. sabdariffa anthocyanins. Additionally, the degradation of delphinidin-3- O -sambubioside, cyanidin-3- O -sambubioside and total anthocyanins from H. sabdariffa calyx ideally followed a first-order model ( R 2 > 0.98) in beverages alone or with additional phenolic acids. Gallic acid improved the stability of H. sabdariffa anthocyanins better than ferulic and caffeic acids, and adding/increasing ferulic and caffeic acids accelerated anthocyanin degradation.
研究领域:
食品科学
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分析化学
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植物化学
✓ 已验证
产品关联
DOI
高影响因子
Food Science and Technology
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2021
·
IF 1.718
LI Ying,YANG Dan,CHEN Bo,CAO Hai-Yan,ZHANG Qing-Feng
The contents of total phenol and flavonoid of 27 edible plants as well as their antioxidative and digestive enzymes inhibitory activities were evaluated. The total phenol content of the 27 plants ranged from 1.28-46.80 mg gallic acid equivalent/g. DPPH, ABTS and reducing power assay explored that Rubus idaeus Linn, Hibiscus sabdariffa Linn. and Crataegus pinnatifida Bge. exhibited stronger antioxidant capacity among the 27 plants. 4 plants showed inhibitory percentage more than 50% on pancreatic lipase. 10 plants showed inhibitory percentage more than 50% on α-glucosidase. 3 plants simultaneously possess significant inhibitory activities on pancreatic lipase and α-glucosidase, which were Alpinia officinarum Hance, Ginkgo biloba Linn. leaves and Vitis vinifera Linn. Seeds. Strong positive correlation between total phenol content and antioxidative capacity were found. However, digestive enzymes inhibitory activity was less correlated with total phenol and total flavonoids content.
研究领域:
药理学
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营养学
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植物科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Lan Wang,Mingxi Li,Yan Wang,Luyao Xu,Xicheng He,Haixiang Li,Xiaoxia Li
The calyxes of roselle are rich in polyphenols and have excellent antioxidant capacities. However, because polyphenols are unstable, it is challenging to develop a method to efficiently obtain and maintain the activity of polyphenols from roselle. Herein, a method for preparing polyphenol extract from roselle is developed. A two-dimensional (2D) magnetic Poly(deep eutectic solvents) (PDES) based on magnetic graphene oxide is prepared as an adsorbent for extracting polyphenols from roselle, and roselle polyphenol extract is efficiently prepared by matrix solid-phase dispersion method. Under the conditions of sample/dispersant ratio of 1:4, grinding time of 3 min, and ultrasonic elution of 60 % ethanol for 5 min, the polyphenol content extracted from roselle is 30.362 ± 1.224 mg/g. Density functional theory calculations show that the 2D-MPDES can efficiently adsorb polyphenols via π–π stacking owing to the numerous benzene ring structures on its surface. Ultra-performance liquid chromatography quadrupole time-of-flight mass spectroscopy shows that the active substance prepared using the 2D-MPDES contains 39 compounds. Finally, the antioxidant capacity and antiphotoaging potential of the roselle polyphenol extract prepared using the 2D-MPDES are investigated. Results show that the roselle polyphenol extract prepared using the 2D-MPDES exhibits good antioxidant capacity and can be used to treat photoaging of HaCaT cells from ultraviolet-B-induced. Our results show that the 2D-MPDES can be used to prepare active substances in roselle–roselle polyphenol extract, which provides a research idea for preparing polyphenol components from natural products. In addition, the successful application of DES helps to maintain the stability of the material and improve its reuse rate, which has a broad application prospect in industrial production.
研究领域:
化学
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材料科学
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药学
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生物技术
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分析化学
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生物化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）