Foods
·
2023
·Vol. 12
·期 14
·2718
·
IF 5.2
Qinzhang Jiang,Shengwei Wang,Yuzhe Yang,Jinxin Luo,Ruili Yang,Wu Li
Rice bean (Vigna umbellata) is a medicinal and dietary legume rich in polyphenols. In this study, the free and bound phenolics in rice bean were extracted by water, 80% methanol, and acid, base, and composite enzymatic hydrolysis, respectively. The polyphenol profiles of the extracted fractions were analyzed. The outcome demonstrated that base hydrolysis was the most effective way to liberate bound phenolics from rice bean (14.18 mg GAE/g DW), which was 16.68 and 56.72 folds higher than those extracted by acid and enzymatic hydrolysis, respectively. The bound polyphenols released by base hydrolysis contributed to 71.15% of the total phenolic content. A total of 35 individual phenolics was identified, of which isoquercitrin, procyanidin B1, rutin, taxifolin, and catechin were the main monomeric phenolics in the free fraction, while gallic acid, protocatechuic acid,p-hydroxybenzoic acid, catechin, and phloroglucinol were the main monomeric phenolics in the bound fraction. In comparison to the free phenolics extracted by water and 80% methanol and the bound phenolics extracted using acid and composite enzymatic hydrolysis, the bound phenolics from base hydrolysis had a superior antioxidant capacity. The antioxidant activity of rice bean is primarily attributed to individual phenolics such as catechin, abundant both in free and bound fractions, and alsop-hydroxybenzoic acid, gallic acid, and protocatechuic acid in bound fractions. The bound phenolics of rice bean were first reported and showed large differences with the composition of free phenolics. This work suggests that the bound fraction of rice bean must be taken into account in assessing its potential benefits to health.Keywords:rice bean;free phenolics;bound phenolics;antioxidant
研究领域:
食品科学
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营养学
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植物化学
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DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2012
·
IF 3.655
Qin Liu,Li Wu,Huiming Pu,Chunyang Li,Qiuhui Hu
The profile and distribution of soluble and insoluble phenolics in 10 rapeseed ( Brassica napus ) varieties were studied in this work. Photometric results show that the soluble total phenolic content (TPC) and the total tannin content (TTC) of rapeseed dehulled flours are much higher than those of rapeseed hulls. Soluble and insoluble phenolics were further analysed by HPLC/MS and MS/MS. For soluble phenolics, seven species were identified and quantified. Sinapine was found to be the major component in both defatted rapeseed hulls and dehulled flours, with its content ranging from 0.93 to 1.76 mg/g and 15.65 to 21.88 mg/g, respectively. For insoluble phenolics, eight phenolic acids were detected in rapeseed hulls, while only two of them were found in their dehulled flours. Sinapic acid and protocatechuic acid, which also were found in dehulled flours, were identified as two major insoluble phenolics in rapeseed hulls. Insoluble TPCs in defatted rapeseed hulls and dehulled flours were shown to be in the similar range.
研究领域:
植物化学
·
食品科学
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Zifan Hu,Weiyang Sun,Jiaqi Guo,Xuan Wang,Li Yong,Lin Ren,Dejian Feng,Xiaoli Zou
Using high-performance liquid chromatography-mass spectrometry, fifteen bisphenols and halogenated phenols were simultaneously analyzed in tea for the first time in China. Response surface methodology was used to optimize sample preparation conditions based on QuEChERS. Finally, the limits of detection and the limits of quantification were 0.0200–0.173 μg/kg and 0.0892–0.770 μg/kg, respectively. The recoveries were 70 %–120 % for most compounds (except for some compounds at low spiked concentrations) with RSDs <20 %. Then 135 dried tea samples were analyzed. Bisphenol S, A and F were the predominant bisphenol contaminants with detection rates above 80 %, and the median level of bisphenol F (4.90 μg/kg) was even higher than that of bisphenol A (2.74 μg/kg). Bisphenol A ( p < 0.001) and bisphenol F ( p = 0.007) were significantly higher in black tea than in green tea. Hazard index was estimated and bisphenols in tea may pose potential risks to human health.
研究领域:
食品科学
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环境科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
Journal of Functional Foods
·
2017
·
IF 3.144
Han Peng,Wenting Li,Hongyan Li,Zeyuan Deng,Bing Zhang
Both extractable (EPE) and non-extractable bound phenolic (BPE) in the seed coat and cotyledon of black bean were investigated in the present study. Their total phenolic contents (TPC) and antioxidant activities (DPPH, ABTS and FRAP) were evaluated, and the phytochemical compositions of EPE and BPE in both seed coat and cotyledon of black soybean were identified and quantified ( Glycinemax(L.) merr ) by UPLC-ESI-QTOF-MS/MS and UPLC-ESI-QqQ-MS/MS. In the present study, a total of 112 and 78 compounds were identified or tentatively characterized in the black soybean EPE and BPE, respectively, with the majority being phenolic acids and flavonoids. Seed coat contains more abundant phenolics than that of cotyledon in all fractions. In addition, our results indicated that acid hydrolysis is more thorough than alkaline hydrolysis in the extraction of bound phenolics of black soybean. Our study provides available information for non-extractable bound phenolic constituents and their distribution in the seed coat and cotyledon of black soybean.
研究领域:
植物化学
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食品科学
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产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2022
·
IF 6.449
Ya zhu Wang,Jin Zheng,Muhammad Nawaz,Fan Yang,Jiajun Hu,Min-Tian Gao
In this study, it was found that soluble polysaccharides (SPs) from rice straw were conjugated with high levels of phenolic compounds . A gradient ethanol precipitation method was used to separate conjugates with different phenolic compound components. These conjugates were mainly composed of disaccharides or trisaccharides and phenolic acids that were mainly p- coumaric acid, ferulic acid, vanillic acid, and vanillin. SPs with more conjugates exhibited better effects on Saccharomyces cerevisiae and ethanol fermentation . The change in the proportion of conjugates in SPs significantly affected the accumulation of intracellular trehalose and glycerol content, indicating the effect of the conjugates on intracellular osmotic stress. Moreover, SPs with more conjugates generated lower intracellular hydrogen peroxide (H 2 O 2 ) levels. Thus, oligosaccharide and phenolic compound conjugates in SPs promoted yeast growth and ethanol fermentation. For instance, OD value reached 9.4, which was 1.3 times higher than the control group, and ethanol content at 36 h was 36.5 g/L, which was 1.3 times higher than the control. Osmotic pressure alleviation and lowered intracellular H 2 O 2 levels by conjugates are key mechanisms of the SPs during yeast growth and ethanol fermentation.
研究领域:
生物化学
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微生物学
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发酵工程
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DOI
高影响因子
Royal Society Open Science
·
2019
·Vol. 6
·期 10
·
IF 2.515
Lisheng Shi,Jiayan Ge,Fuqiang Zhang,Shuangxi Nie,Chengrong Qin,Shuangquan Yao
Adsorbable organic halogen (AOX) is generally formed by the reaction of residual lignin in pulps with chlorine dioxide during bleaching. Lignin has a complex structure. Different functional groups and bonds are present in lignin structures. Phenolic hydroxyl is one of the important functional groups in lignin, and it significantly influences the chemical properties and reactivity. To study the effect of phenolic hydroxyl on AOX formation, vanillyl alcohol (VA) was selected as the phenolic lignin model compound, and veratryl alcohol (VE) was selected as the non-phenolic lignin model compound in this study. The kinetics of AOX formation by the reaction of VA or VE with chlorine dioxide was studied. The effects of pH, chlorine dioxide, lignin model compound concentration and reaction temperature on AOX formation are discussed. The activation energies of the reaction of VA and VE with chlorine dioxide are 16 242.47 J mol−1 and 281.34 J mol−1, respectively. Thus, we found that the non-phenolic lignin can react with chlorine dioxide to form AOX more easily than phenolic lignin.
研究领域:
林产化学与技术
·
环境科学
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DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2020
·
IF 4.006
Xiaoqin Wang,María del Mar Contreras,Dunming Xu,Chen Xing,Lijuan Wang,Daomao Yang
Bound phenolic compounds have been widely investigated in food from plants, while research on vegetable oils is limited. Thus, to comparatively analyse free and bound phenolic compounds in a lipid system, different distributions of free and bound phenolic compounds were prepared by exogenous addition of chemical standards to model tea seed oil in this work. For that, the phenolic composition was quantified with UHPLC-QqQ-MS/MS, and the antioxidant capacity was evaluated by the DPPH assay and the Rancimat method. After pre-optimisation of concentrations, the results showed that the oil sample contained 12.3% bound phenolic compounds after incubation for 6 h, higher than the other samples (0, 2, 4, 8, 10 and 12 h) with equal addition. This sample also had a longer reduction time during Rancimat oxidation, corresponding to the higher total DPPH radical scavenging capacity. Further, docking, molecular dynamics and quantum mechanics analysis revealed that intermolecular forces might account for binding forms between phenolic compounds and glycerides, including hydrogen bonds and hydrophobic interactions. In addition, the structure-activity relationship of bound phenolic compounds was explored tentatively. Conclusively, bound phenolic compounds in vegetable oil, probably formed by intermolecular interactions, enhanced antioxidant capacity, a novel perspective on the antioxidation in lipids.
研究领域:
食品科学
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脂质化学
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植物化学
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产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 9
·7239-7248
·
IF 3.289
Lizi Huang,Mingyan Liao,Xin Yang,Hao Gong,Liang Ma,Yudan Zhao,Kun Huang
Bisphenols (BPs) are a group of chemicals with two hydroxyphenyl functionalities. BPs analogues including bisphenol A (BPA), bisphenol B (BPB), bisphenol F (BPF), bisphenol S (BPS), bisphenol AF (BPAF), bisphenol AP (BPAP), tetrabromobisphenol A (TBBPA) and tetrachlorobisphenol A (TCBPA) are widely used in the production of plastic materials. There has been a growing concern worldwide about environmental BPs exposure due to their potential adverse effects on human health. Deposition of β-cell toxic misfolded human islet amyloid polypeptide (hIAPP), a hormone biosynthesized and secreted by the pancreatic β-cells, is a cardinal finding in type 2 diabetes mellitus (T2DM). Epidemiological studies suggest BPA exposure is positively associated with the incidence of T2DM, which may be due to the exacerbated toxic aggregation of hIAPP induced by BPA as we previously reported. Here, we demonstrate that bisphenol analogues showed different effects on hIAPP amyloid formation. Unlike the accelerating effects of BPA, four BPs analogues (BPAF, BPAP, TBBPA and TCBPA) showed inhibitory effects on hIAPP aggregation and decreased the membrane disruption capacity of hIAPP. Our results also explained a possible relationship between the spatial structure and the inhibitory capacities of BPs analogues.
研究领域:
环境科学
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毒理学
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分子生物学
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内分泌学
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产品关联
DOI
高影响因子
Royal Society Open Science
·
2019
·Vol. 6
·期 2
·
IF 2.515
Lisheng Shi,Jiayan Ge,Shuangxi Nie,Chengrong Qin,Shuangquan Yao
Adsorbable organic halogens (AOX) are formed in pulp bleaching as a result of the reaction of residual lignin with chlorine dioxide. The natural structure of lignin is very complex and it tends to be damaged by various extraction methods. All the factors can affect the study about the mechanism of AOX formation in the reaction of lignin with chlorine dioxide. Lignin model compounds, with certain structures, can be used to study the role of different lignin structures on AOX formation. The effect of lignin structure on AOX formation was determined by reacting phenolic and non-phenolic lignin model compound with a chlorine dioxide solution. Vanillyl alcohol (VA) and veratryl alcohol (VE) were selected for the phenolic and non-phenolic lignin model compound, respectively. The pattern consumption of lignin model compounds suggests that both VA and VE began reacting with chlorine dioxide within 10 min and then gradually steadied. The volume of AOX produced by VE was significantly higher than that produced by VA for a given initial lignin model compound concentration. In a solution containing a combination of VA and VE in chlorine dioxide, VE was the dominant producer of AOX. This result indicates that the non-phenolic lignin structure was more easily chlorinated, while the phenolic lignin structure was mainly oxidized. In addition, AOX content produced in the combined experiments exceeded the total content of the two separate experiments. It suggested that the combination of phenolic and non-phenolic lignin structure can promote AOX formation.
研究领域:
制浆造纸科学
·
环境化学
·
有机化学
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2020
·
IF 6.785
Caiyun Liu,Junyi Hu,Subharanjan Biswas,Feng Zhu,Jinhua Zhan,Guo Wang,Chen-Ho Tung,Yifeng Wang
Surface-enhanced Raman spectroscopy (SERS) of semiconducting TiO2 was used for studying binding modes and surface reactions of molecules bound at the interface but is generally limited by low signal intensity and lack of authentic structural information. Here, we report a representative titanium-oxide cluster (TOC), i.e., Ti17O24(OiC3H7)20 (Ti17), combines the benefits from both precise structures and intense SERS signals by providing a titania surface. According to the single-crystal X-ray diffraction analysis, phenols and catechols are vertically attached via σ-bonds to the certain sites of Ti17. Ti17 brings about much more intense Raman signals than the reference TiO2 NPs, leading to 10–5–10–6 M analyte detection (enhancement factors are 103–105). The contributions of focusing effect, CHEM effect and resonance mechanism, all of which are found responsible for the higher SERS activity of Ti17 than the reference TiO2 NPs, in the SERS by Ti17 are quantitatively analyzed. This study suggests SERS by TOCs may be promising for detection purposes and structural studies of environmentally and catalytically relevant molecules with fewer assumptions regarding molecular structures or binding mechanisms.
研究领域:
分析化学
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材料科学
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环境科学
·
表面科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2020
·Vol. 27
·期 10
·1-11
·
IF 2.426
Haq Fazal,Yu Haojie,Wang Li,Liu Jian,Mehmood Sahid,Haroon Muhammad,Amin Bilal-Ul,Fahad Shah,Uddin Md Alim
In this article, starch phosphate- g -poly (methacrylic acids) (SP- g -PMAAs) were synthesized by dual modification. Firstly starch phosphate (SP) was synthesized by phosphorylation of native starch (NS) with mono sodium-phosphate and di sodium-phosphate. Afterwards, methacrylic acid (MAA) was grafted onto SP via free radical polymerization to synthesize SP- g -PMAAs. The structure of the SP and SP- g -PMAAs was investigated by phosphorus nuclear magnetic resonance, proton nuclear magnetic resonance and fourier-transform infrared spectroscopy. The X-ray diffraction studies showed that the modification diminished the crystalline nature of SP and SP- g -PMAAs. The SEM images showed spherical or polyhedral smooth surface for the starch. After modification, SP and SP- g -PMAAs exhibited distorted and rougher surfaces which are assumed to be good for adsorption. The dual modification produced phosphate and carboxylic groups on the starch backbone. The phosphate and carboxylic groups have high tendency to make hydrogen bonding with phenol. The comparative adsorption studies of NS, SP and SP-g-PMAAs were checked for phenol. The experimental results showed adsorption efficiencies of 0.022 g/g, 0.082 g/g, 0.100 g/g, 0.148 g/g and 0.151 g/g for NS, SP, SP- g -PMAA1, SP- g -PMAA2 and SP- g -PMAA3, respectively. The following findings revealed that dual modification enhanced the adsorption ability of NS.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
Small
·
2019
·Vol. 15
·期 17
·1805478
·
IF 10.856
Kai Jia,Jiahua Ye,Guoxin Zhuang,Zanyong Zhuang,Yan Yu
Fabrication of low-dimensional nano-MOFs as well as nanoparticles/metal-organic frameworks (MOFs) hybrids has sparked new scientific interests but remains a challenging task. Taking Cu 3 (BTC) 2 as a proof of concept, it is demonstrated thats NH 3 ⋅H 2 O solution of a confined pH value can readily shape the bulk Cu 3 (BTC) 2 into nanoscale Cu 3 (BTC) 2 , beyond the need to control the crystal growth kinetics of MOFs. Adjusting the pH of NH 3 ⋅H 2 O within a much small range (10–11) allows fine tuning over the size and shape of nanoscale Cu 3 (BTC) 2 . Particularly at pH = 11, NH 3 ⋅H 2 O exhibits weak reducibility that triggers a reduction of part of Cu 3 (BTC) 2 into Cu 2 O, while shaping the other into Cu 3 (BTC) 2 nanowires. Benefiting from the coincidence of reduction and etching effects, the newly generated Cu 2 O dots can in situ anchor onto adjacent Cu 3 (BTC) 2 nanowires at highly dispersive state, forming a well-defined sponge-like architecture built of Cu 2 O dots and nano-Cu 3 (BTC) 2 . The CuO x derived from annealing of the Cu 2 O dots/nano-Cu 3 (BTC) 2 hybrid preserves the sophisticated sponge architecture and high porosity, and exhibits promising applications in phenol scavenging, with efficiency outperforming its counterparts and many other Cu-based catalysts reported in literature. It is anticipated that the findings here pave the way for the rational design of intricate nano-MOFs in a more efficient way.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）