Adsorption and desorption characteristics of adlay bran free phenolics on macroporous resins

Yang, Qingyun; Zhao, Ming; Lin, Lianzhu

doi:10.1016/j.foodchem.2015.08.070

Cited by 85 publications

(51 citation statements)

References 34 publications

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“…The desorption of PF was finished within 20 min (Figure b), and the desorption capacity was 9.86 mg/g. These results indicated that HPD‐722 was a rapid adsorption and desorption resin for PF (Q. Yang, Zhao, & Lin, ). The adsorption and desorption behaviors of HPD‐722 on PF were similar to the previous study about the flavonoids separated from P. Orientalis by using macroporous resins (Ren et al., ).…”

Section: Resultsmentioning

confidence: 94%

Purification, Characterization, and Bioactivities of Polyphenols from Platycladus orientalis (L.) Franco

Ren

Liao

Shang

et al. 2019

Journal of Food Science

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The polyphenols (PF) from Platycladus Orientalis (L.) Franco leaves were purified by using 10 different macroporous adsorption resins. HPD‐722 resin showed the best adsorption and desorption capacities. The static and dynamic adsorption and desorption of PF on HPD‐722 resin were studied and the total polyphenols were separated into two fractions, PF‐A and PF‐B. PF‐A and PF‐B demonstrated similar scavenging activity of free radical (DPPH, ABTS, hydroxyl radical, superoxide anion). The scavenging activity of PF‐A and PF‐B on hydroxyl radical and superoxide anion radical reached the equal levels of vitamin C and gallic acid. The IC50 value of PF‐A for hydroxyl radical scavenging activity and superoxide anion radical scavenging activity were 0.50 and 0.56 mg/mL, while those of PF‐B were 0.61 and 0.64 mg/mL. PF‐A and PF‐B could reduce the overproduction of inflammatory cytokines (TNF‐α, Pro‐IL‐1β, and IL‐6) induced by lipopolysaccharide and their protein expression in THP‐1 cells. PF‐B exhibited better anti‐inflammatory effect than PF‐A in the dosage range of 1.0–4.0 µg/mL. Structural identification of PF‐A and PF‐B were conducted by HPLC‐MS/MS. Ten polyphenol compounds were identified in PF‐A and PF‐B, respectively, by HPLC‐MS/MS, including quercetin, apigenin, myricetin, and so on. Molecular docking studies indicated that apigenin, myricetin, luteolin, kaempferol, and quercetin effectively inhibit xanthine oxidase by forming hydrogen bonds with the amino acid residues and binding to the active site of the enzyme. The results might supply useful information for better understanding the chemical structure, antioxidant, and anti‐inflammatory activities of Platycladuso (L.) Franco leaves polyphenols. Practical Application This study demonstrated that polyphenols from P. orientalis (L.) Franco leaves have the potential applications as functional food ingredient for the prevention and treatment of gout and inflammation, hyperuricemia and gout.

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Section: Resultsmentioning

confidence: 94%

Purification, Characterization, and Bioactivities of Polyphenols from Platycladus orientalis (L.) Franco

Ren

Liao

Shang

et al. 2019

Journal of Food Science

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“…This is because, during elution of the bed by distilled water, a quantity of flavonoids washes out with DES. Some investigators reported the recovery of phenolic compounds from DES extracts . Chromatograms are shown in Figs and .…”

Section: Resultsmentioning

confidence: 99%

Deep eutectic solvent‐based extraction of polyphenolic antioxidants from onion (Allium cepa L.) peel

2018

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BACKGROUND Biomass waste, including fruit and vegetable residues, poses a serious challenge to the environment. This demands novel approaches for handling and disposing of it in a safe manner. However, such waste is extremely rich in bioactive components, which are considered to have a beneficial impact on health. This has led to the recovery of high‐value compounds from biomass waste before finally disposing of it. The present investigation reveals the use of green solvents such as eutectic mixtures composed of choline chloride with three different hydrogen bond donors like sucrose (4:1), urea (1:2), and sorbitol (3:1) as extractants for recovering valuable phenolic antioxidants from onion peel. RESULTS A deep eutectic solvent system consisting of choline chloride:urea (ChCl:urea) showed the best result for total phenolic content from onion peel while the other two eutectic mixtures showed relatively lower extraction efficiency. Experiments were performed with different molar ratios of ChCl:U (1:1–1:3) and liquid–solid ratios (10:1–60:1) under a temperature range (50–90 °C) and a time range (60–150 min). Taguchi's method was employed to maximize the extraction of polyphenolic antioxidants from onion peel, resulting in optimal conditions: extraction temperature 60 °C, time 120 min, liquid to solid ratio 50:1 and molar ratio of ChCl:U as 1:2. Under optimum conditions, the corresponding TPC value of the extract was found to be highest at 222.97 mg gallic acid equivalent (GAE) g−1 dw. CONCLUSION Major flavonoids – quercetin, kaempferol, and myricetin – were identified and quantified in the extracts. Moreover, high reducing power (PR) value was reported in the case of ChCl:U extract, and 2,2‐diphenyl‐1‐picrylhydrazyl (DPPH) radical scavenging activity was found to be higher in ChCl:So extract. © 2018 Society of Chemical Industry

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“…It was suggested that the behaviour over the whole adsorption process suggested that the adsorption mechanism involved multilayer adsorption and chemisorption (Li & Wang, ; Li et al ., ). Similar observations were made in a previous study using macroporous resins for adsorption of phenolic compounds (Yang et al ., ).…”

Section: Resultsmentioning

confidence: 97%

Purification of polyphenols from kiwi fruit peel extracts using macroporous resins and high‐performance liquid chromatography analysis

Guo

Qiao

Zhang

et al. 2018

Int J of Food Sci Tech

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Summary An efficient strategy for the purification of polyphenols from kiwi fruit peel extracts was developed in this study. Six different macroporous resins were evaluated in static adsorption and desorption tests, and NKA‐II resin was used for further test because of its high adsorption capacity (21.28 mg g−1 dry resin) and desorption ratio (84.92%). The adsorption mechanism of the NKA‐II resin indicated that pseudo‐second‐order kinetics and the Freundlich isotherm model could adequately explain the adsorption process, and the thermodynamic tests showed that the process was endothermic, spontaneous and feasible. Furthermore, by optimising the dynamic adsorption and desorption parameters, the purity of the final polyphenols improved dramatically from 33.2% to 55.26%. In addition, the qualitative and quantitative determinations of the polyphenols before and after purification were conducted by a high‐performance liquid chromatography (HPLC) method. The results of this study showed that the developed method provided a promising basis for the large‐scale purification of polyphenols from kiwi fruit peel.

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Adsorption and desorption characteristics of adlay bran free phenolics on macroporous resins

Cited by 85 publications

References 34 publications

Purification, Characterization, and Bioactivities of Polyphenols from Platycladus orientalis (L.) Franco

Purification, Characterization, and Bioactivities of Polyphenols from Platycladus orientalis (L.) Franco

Deep eutectic solvent‐based extraction of polyphenolic antioxidants from onion (Allium cepa L.) peel

Purification of polyphenols from kiwi fruit peel extracts using macroporous resins and high‐performance liquid chromatography analysis

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