EUROPEAN FOOD RESEARCH AND TECHNOLOGY
·
2021
·Vol. 247
·期 5
·1149-1165
·
IF 2.998
Li Yajing,Sun Hongxia,Li Jindong,Qin Shu,Niu Zimian,Qiao Xiongwu,Yang Baoru
Phenolic compounds in apples 17 cultivars ( Malus domestica Borkh.) and 3 wild forms ( Malus sp.) were analyzed to study the impact of genetic background, growth site, and fruit bagging. The impact of altitude was studied in nine cultivars by analyzing fruits collected from orchards at three altitudes. Procyanidin B2 (71–628 μg/g fresh weight), ( −)-epicatechin (35–357 μg/g), and chlorogenic acid (28–563 μg/g) were always the three most abundant phenolic compounds in the apple samples studied, except for the cultivar ‘Qinguan’, which had a very low content of ( −)-epicatechin (13 μg/g) and procyanidin B2 (8 μg/g). The wild apples of M. prunifolia (Willd.) Borkh were 5-times richer in epicatechin (278 μg/g) and procyanidin B2 (628 μg/g) than the commercial cultivars of M. domestica Borkh (86 and 54, respectively). Among the commercial cultivars, ‘Qinguan’ had the highest level of chlorogenic acid but the lowest content of flavan-3-ols, whereas ‘Liuyuehong’ was characterized by the highest content of quercetin glycosides. Procyanidin B2, and ( −)-epicatechin correlated negatively, while other phenolics positively, with altitude. The response of phenolic compounds to altitude variation depended on latitude variation and genetic backgrounds. Bagging treatment reduced the contents of most phenolic compounds, with the impact of cultivars and length of re-exposure before harvest. This is also the first report on phenolic compounds in several important new cultivars, adding new knowledge on the compositional characteristics of global apple resources.
研究领域:
植物学
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食品科学
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园艺学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Nianbing Zhong,Jilin Yuan,Yihao Luo,Mingfu Zhao,Binbin Luo,Qiang Liao,Haixing Chang,Dengjie Zhong,Bruce E. Rittmann
We developed and demonstrated a novel intimately coupled photocatalysis and biodegradation (ICPB) system. The ICPB system was comprised of photocatalytic optical hollow-fibers (POHFs) coated with Ag-loaded GeO 2 and N-doped TiO 2 photocatalyst, along with a biofilm that included phototrophic and heterotrophic microorganisms. The POHFs exhibit high UV–visible photocatalytic activity to degrade phenolic compounds rapidly and stably, decrease toxicity, generate readily biodegradable products, and emit visible light for biofilm growth and O 2 production by phototrophs. O 2 produced by the phototrophs was transferred to the POHFs, helping generate hydroxyl free radicals for photocatalysis. The biofilm, which became enriched in Rhodococcus and Pseudomonas , maintained rapid and stable biodegradation of photocatalytic products from the phenolics. Thus, the synergism among photocatalysis, biodegradation, and photosynthesis in the novel ICPB system provided an efficient means to rapidly and sustainably degraded and mineralized high concentrations of phenolic compounds.
研究领域:
环境科学
·
微生物学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Tingting Liu,Yanfan Yang,Li Yan,Biying Lin,Lin Dai,Zhanhua Huang,Chuanling Si
Adhesives are used extensively in the wood industry. As resource and environmental issues become increasingly severe, the development of green and sustainable biomass-based adhesives has attracted increasing attention. In this work, a green wood adhesive is developed from poly(vinyl alcohol) and lignin with molecular designs of lignin extending beyond those in nature. The lignin undergoes extraction from corncob residue, aldehydration, and phenolisation (phenol, resorcinol, and catechol) to significantly increase the phenolic hydroxyl groups (over 7.92 mmol/g), which has the effect of enhancing the hydrogen bonding force between the adhesive and the wood, thereby greatly improving adhesive performance. Compared with pure PVA, polyphenol lignin-containing PVA showed improved adhesion strength and hydrophobicity . PVA/resorcinol-lignin has the significantly improved wood lap shear strength (6.27 MPa, 77.6 % improvement) and hydrophobicity (almost 100 % increase in wet shear strength). This research not only provides a green and high-performance alternative raw material for wood adhesives but also broadens the path for large-scale application of biomass.
研究领域:
材料科学
·
林业工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Xue Wu,Hui Li,Wenlin Xu,Ge Fei,Minghao Zhou,Xin Zhao
Lignin accounted for the second largest amount in biomass, and was regarded as an important carbon source and important renewable source for value-added chemicals. Herein, a series of lignin-derived carbon-based heterogeneous catalyst was synthesized through a simple hydrothermal method , using Co-MOFs as template. Lignin was introduced as a carbon material into MOF catalysts. Through some characterizations, it has been proven that lignin has been successfully introduced into MOF materials and significantly improved the catalyst performance. Then, lignin-MOF derived catalysts (Co/C-EL-X) were successfully introduced into the catalytic hydrodeoxygenation of lignin-derived phenols . The addition of enzymatic hydrolysis lignin (EL) in catalysts, calcination temperature and some other factors were investigated in detail, considering the catalytic performance during the HDO of vanillin and other typical lignin-derived phenols. Co/C-EL-0.5(500) exhibited the best catalytic performance for the conversion of different kinds of lignin-derived phenols to either 2-methoxy-4-methylphenol (MMP) or cyclohexanol . Under the optimal conditions of 240 °C, 0 MPa N 2 , and 2 h, the conversion rate of vanillin reached 100 %, and the yield of 4-methyl-2-methoxyphenol (MMP) was up to 92 %. Furthermore, vanillin could also be converted into 4-methylcyclohexanol (MCYL) by changing the initial nitrogen pressure. Also, Co/C-EL-0.5 (500) exhibited high activity for the conversion of other lignin-derived phenols into cyclohexanol (COL). This work provided a novel strategy for the catalytic valorization of lignin sources.
研究领域:
化学工程
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可再生资源利用
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产品关联
DOI
高影响因子
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
·
2014
·Vol. 25
·期 11
·1956-1964
·
IF 1.253
Dong Jianwei,Cai Le,Zhu Xiufang,Huang Xing,Yin Tianpeng,Fang Haixian,Ding Zhongtao
Cornhusk, corncob, and stigma maydis were extracted with water, aqueous ethanol, aqueous methanol, and ethyl acetate, respectively. The total phenolic contents (TPC), total flavonoid contents (TFC), total ketosteroid contents (TKC), and antioxidant activities [2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and 2,2'-diphenyl-1-picrylhydrazyl (DPPH) and 2,4,6-tri(2-pyridyl)-1,3,5-triazine (TPTZ) radical-scavenging activity, reducing power, and ferric reducing-antioxidant power (FRAP)] of the above extracts were investigated. Their main antioxidant components were further determined and quantified by high performance liquid chromatography (HPLC). The results revealed that the aqueous ethanol and aqueous methanol were more efficient in extracting antioxidant constituents from cornhusk, corncob, and stigma maydis. Eight main antioxidant components were detected from above three by-products, and the contents of four main antioxidant components were determined. The present work revealed that the cornhusk and corncob showed similar high TPC, TFC, TKC, and antioxidant activities with stigma maydis, and could be used as potential candidates for the prevention of diseases related to various oxidant by-products of human metabolism.
研究领域:
植物化学
·
食品科学
·
药理学
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2019
·
IF 5.256
Juan Zheng,Luyi Chen,Xintong Xie,Qing Tong,Gangfeng Ouyang
Integrating the steps of direct carbonization , removal of silica and polymerization of dopamine, four ordered mesoporous carbons (OMCs) doping with different constituents were prepared and characterized successfully, which were proved to possess similar ordered mesopore structure, high surface area and different hydrophilic properties . Subsequently, a series of pollutants were selected as target analytes to investigate the enrichment capacities of as-prepared OMCs based on the technique of solid phase microextraction (SPME). It was found that the OMC modified with polydopamine (OMC@PDA) demonstrated outstanding performance towards phenols, since its hydrophilicity was enhanced by PDA. Moreover, two extraction modes were employed to study the extraction process, including headspace and direct immersion. The synergistic enhancement effect of enrichment efficiency and mass transfer towards phenols using the OMC@PDA-coated fiber was demonstrated in the mode of direct immersion. To realize the target of high sensitivity, the OMC@PDA-coated fiber was coupled with the gas chromatography-mass spectrometry (GC-MS) after optimizations to develop analytical method. Wide linear range (5–5000 ng L −1 ), low detection limits (0.08–0.38 ng L −1 ) and excellent reproducibility made the developed method feasible for the determinations of trace phenols in environmental water samples.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Qingshuang Wei,Xinrong Zong,Yitao Lv,Chaoqi Wang,Jiacheng Wang,Min Zhang
Electro-activation has been an important surface modification strategy to enhance the signal of analytes on glassy carbon electrodes (GCE). However, its unique effects on certain analytes remain to be further explored. Hence, due to the electro-active hydroxyl groups (–OH), phenolic compounds were selected as the analyte to reveal it to some extent. Except for the improved electrocatalytic activity of electro-activated GCE (e-GCE) which was attributable to the improved charge transfer ability and optimized surface properties ( eg. surface area, surface roughness, and active sites), the oxygen-containing functional groups on the e-GCE surface were also identified as being of significant importance for enhanced response of phenolic compounds. After electro-activation, the newly generated C O constituted 12.81 % of the C1s spectra and 51.75 % of the O1s spectra, effectively facilitating the formation of donor–acceptor complexes between the analytes and the electrodes, thereby enhancing the adsorption of phenolic compounds. Furthermore, it was found that the structure of phenolic compounds had a remarkable impact on the response signal. The increase in the number of –OH groups involved in the electron transfer process, the increase in the number of aromatic rings, and the enhancement of the electronegativity of substituents all contributed positively to the response signal of phenolic compounds. At last, based on the great adsorption of catechol, a sensor for catechol with a sensitivity 12-fold higher than prior has been established. These results provide insights for the subsequent fabrication of green sensors for more electro-active molecules.
研究领域:
分析化学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
·
2019
·
IF 6.395
Hengjun Gai,Lin Qiao,Caiyun Zhong,Xiaowei Zhang,Meng Xiao,Hongbing Song
Phenolic compounds are mainly derived from coal tar and coal liquefaction oil. The traditional acid-base separation method, also called caustic washing can result in serious environmental problems. In this work, we used ethanolamine (C 2 H 7 NO) to separate phenolic compounds from coal tar rather than caustic washing. Although a slightly lower efficacy of separation was obtained with C 2 H 7 NO, extracting phenolic compounds with C 2 H 7 NO provided better economic benefits than with caustic washing. The factors influencing the separation effect were studied in detail. In addition, the extraction mechanism of ethanolamine method was investigated by analyzing the chemical interaction of C 2 H 7 NO and phenolic compounds using Fourier transform infrared and nuclear magnetic resonance spectroscopy . Results showed that the phenolic compounds and C 2 H 7 NO formed complexes through hydrogen bonding, (coordination), leading to the formation of C 2 H 7 NO complexes, which resulted in the effective separation of phenolic compounds from other components in coal tar. The results are further supported by quantum chemical calculations. Most importantly, the experiment confirmed that the C 2 H 7 NO in the complex can be recovered via distillation and a complete phenol extraction process was conceptually designed and proposed by simulation. Considering the environmental and economic advantages, the ethanolamine method can be used to reduce the alkali residue and phenol-containing wastewater in the industrial production process, which is beneficial for environmental protection. By calculating the total cost of the two methods, the profit from using the ethanolamine method can reach $173,000 or more than the caustic washing method. Thus, the proposed ethanolamine method can be used as an environment-friendly substitute for industrial phenol separation.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF FOOD SCIENCE
·
2020
·Vol. 85
·期 5
·1450-1461
·
IF 2.479
Xiaoqin Wang,Wencong Jia,Guoyin Lai,Lijuan Wang,María del Mar Contreras,Daomao Yang
Bound phenolic compounds have rarely been reported in vegetable oils and this may be due to little research about the extraction. Deep eutectic solvents (DESs), recently applied in the extraction of phenolic compounds as alternatives to organic solvents, were adopted in the extraction of free and bound phenolic compounds from tea seed oil in this work. First, the phenolic compounds were analyzed by ultra-high-performance liquid chromatography with quadrupole-time-of-flight and triple-quadrupole tandem mass spectrometry (UHPLC-Q-TOF-MS/MS) for characterization and UHPLC-QqQ-MS/MS for quantification and 25 phenolic compounds were found to exist in both free and bound forms. Then, DESs were screened for extraction of free and bound phenolic compounds from tea seed oil as the pretreatment for analysis and the results showed that hydrogen bond donors (HBDs) and temperature significantly affected the extraction efficiency of DESs. Finally, free phenolic compounds (83.91 µg/g) and bound phenolic compounds (25.71 µg/g), extracted by the DES with glycerol as HBD at 50 °C, were 51.0% and 93.2% higher than those extracted by methanol/water (60%, v/v), respectively. This work not only advanced the basic data of phenolic compounds in tea seed oil but also explored an efficient extraction method for scientific analysis of free and bound phenolic compounds.
研究领域:
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROPHORESIS
·
2018
·Vol. 39
·期 14
·1771-1776
·
IF 2.569
Mei-E Yue,Qiaoyan Lin,Jie Xu,Ting-Fu Jiang
An ionic liquid-based headspace in-tube liquid-phase microextraction (IL-HS-ITLPME) in-line coupled with CE is proposed. The method is capable of quantifying trace amounts of phenols in environmental water samples. In the newly developed method, simply by placing a capillary injected with ionic liquids (IL) in the HS above the aqueous sample, volatile phenols were extracted into the IL acceptor phase in the capillary. After extraction, electrophoresis of the phenols in the capillary was carried out. Extraction parameters such as the extraction time, extraction temperature, ionic strength, volume of the sample solution, and IL types were systematically investigated. Under the optimized conditions, enrichment factors for four phenols were from 1510 to 1985. The proposed method provided a good linearity, low limits of detection (below 5.0 ng/mL), and good repeatability of the extractions (RSDs below 6.7%, n = 6). This method was then utilized to analyze two real environmental samples of Xiaoxi Lake and tap water, obtaining acceptable recoveries and precisions. Compared with the usual HS-ITLPME for CE, IL-HS-ITLPME-CE is a simple, low cost, fast, and environmentally friendly preconcentration technique.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CLAY SCIENCE
·
2018
·
IF 3.641
Ying Xu,Muhammad Asim Khan,Fengyun Wang,Mingzhu Xia,Wu Lei
A novel multi amine-containing Gemini surfactant (including four positively charged N) modified organo-montmorillonite (GMt) was prepared and served as adsorbents of phenol, o-chlorophenol (2-CP) and 2,4,6-trichlorophenol (2,4,6-TCP). The structure and morphology of GMt were studied by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), N 2 adsorption/desorption isotherms (BET) and thermo gravimetric analysis (TGA). A batch technique was applied to investigate the influence of various factors, and the results illustrated that the saturated intercalation concentration of the modifier was 0.8 times to the cation exchange capacity (CEC) of the original Na-Mt and the adsorption was pH dependent, the optimum adsorption occurred at pH = 10, 7, 5 for phenol, 2-CP and 2,4,6-TCP, respectively. At the same conditions, the adsorption capacities of original Na-Mt were only 8.29 mg/g, 26.20 mg/g and 39.13 mg/g for three phenolic pollutants, while the maximum equilibrium adsorption amounts were 81.68 mg/g, 336.59 mg/g and 535.49 mg/g for phenol, 2-CP and 2,4,6-TCP, respectively. The adsorption kinetics of all the three phenols was in good agreement with the pseudo-second order kinetics model . The adsorption isotherm of 2,4,6-TCP was abided by Langmuir and Freundlich isotherm, however, phenol and 2-CP were better modeled by Freundlich isotherm. The negative values of ∆ G ° and positive values of ∆ H ° got from thermodynamic study confirmed that the adsorption of 2-CP and 2,4,6-TCP on GMt was a physical, spontaneous and endothermic process . The adsorption process of phenol was an exothermic process. Both adsorption and partition contributed to the adsorption of these three phenols to organo-montmorillonite.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
IET Renewable Power Generation
·
2019
·Vol. 13
·期 10
·1641-1646
·
IF 3.605
Xiangping Li,Jianguang Zhang,Ningge Xu,Guanyi Chen,Beibei Yan
With the depletion of non-regenerated energy and the increasing awareness of environmental protection, renewable energy developing has become a key subject of research. Hydrogen as a kind of clean energy has aroused much attention. In this study, hydrogen production from bio-oil derived phenolic compound in aqueous phase was studied. Hydrotalcite-derived Ni/Zn/Al catalysts with different metallic compositions were synthesised and screened for aqueous-phase reforming (APR) of phenol. The physiochemical characterisations of hydrotalcite-derived Ni/Zn/Al samples were detected by X-ray powder diffraction (XRD), scanning electron microscope (SEM), fourier transform infrared spectroscopy (FTIR) and N 2 -sorption. In the calcined hydrotalcite-derived Ni 5.3 /Zn 2.7 /Al samples, most of the metal oxides exist in the form of rock solid and wurtzite type phase. In order to optimise the reaction condition of APR of phenol, the impacts of initial phenol concentration, reaction pressure and reaction temperature during the APR of phenol were investigated. It was found that increasing the concentration of phenol could enhance the side reaction and decrease the selectivity of hydrogen, while enhancing the reaction pressure was not favourable for hydrogen production. Moreover, proper reaction temperature was necessary for APR of phenol to produce hydrogen over hydrotalcite-derived Ni/Zn/Al catalysts.
研究领域:
能源化学
·
催化化学
✓ 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）