INTERNATIONAL JOURNAL OF FOOD PROPERTIES
·
2016
·
IF 1.586
Kechan Lei,Wanxing Wei,Sheng Liu,Min Zhou,Xiaoxia Lin,Xun Cao
Antioxidant activities of the extract containing anthocyanins from fruit of Sageretia theezans Brongn were investigated in this work. The fruit of Sageretia theezans Brongn was treated with 0.001 mol·L–1 HCl in a solid (g): liquid (mL) ratio 1:10 to give extract. Total anthocyanins content was 253.10 ± 2.31 mg in 100 g fruit. The anthocyanins in extract were determined as cyanidin-3-sophorose-5-glucoside (Cy-3-Sp-5-Glu), petunidin-3-(6′-malonyl)-glucoside (Pt-3-(6’-Mal)-Glu), malvinidin-3-glucosid (Mv-3-Glu), and peonidin-3-(6′-malonyl)-glucoside (Pn-3-(6’-Mal)Glu) in 0.38, 22.57, 44.32, and 30.86%, respectively, by high performance liquid chromatography-mass spectrometry method. Antioxidant activities of the anthocyanins in extract were evaluated by methods of ferric reducing antioxidant power, hydroxyl radical scavenging assay, and superoxide radical scavenging assay. The anthocyanins in extract exhibited obvious antioxidative activities. These results suggested that the fruit of Sageretia theezans Brongn could be considered as a good source of natural antioxidants.
研究领域:
植物化学
·
食品科学
·
药理学
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产品关联
DOI
高影响因子
POSTHARVEST BIOLOGY AND TECHNOLOGY
·
2022
·
IF 6.751
Yonghua Zhang,Qiuli OuYang,Bin Duan,Okwong Oketch Reymick,Yue Chen,Yuanzhen Tan,Xiangrong Zhu,Donglin Su,Gaoyang Li,Nengguo Tao
Green mold, caused by Penicillium digitatum , is the primary postharvest disease in citrus fruit. Trans -2-hexenal was found to exert a considerable inhibitory effect on the mycelial growth of P. digitatum with a minimum fungicidal concentration (MFC) of 0.106 g L −1 . To overcome its hydrophobic restriction, a trans -2-hexenal- β -cyclodextrin inclusion complex ( β -CDIC) was prepared by the saturated aqueous solution method. In vitro assays revealed that the MFC of β -CDIC for P. digitatum mycelial growth was 1.00 g L −1 , and 10.0 g L −1 β -CDIC apparently reduced the incidence of green mold in citrus fruit inoculated with P. digitatum while maintaining fruit quality. The structure of β -CDIC was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), fourier transform-infrared spectroscopy (FT-IR), thermogravimetric (TG), and nuclear magnetic resonance (NMR) analyzes. The results showed that the H-1 proton of trans -2-hexenal correlated with the H-5′ proton of β -cyclodextrin ( β -CD), which was further confirmed by molecular docking analysis. The present study suggests that β -CDIC is a promising candidate for controlling postharvest diseases in citrus fruit.
研究领域:
植物病理学
·
食品科学
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Jing Yu,Qinhua Wang,Xiaofeng Pan,Xiaojuan Ma,Shilin Cao,Yonghao Ni
Hydrogels are easily dehydrated during use and storage, making it difficult to maintain structural and performance stability, which greatly reduces their application value as wearable devices. Inspired by the structure of fruit, an ionic organohydrogel core containing Ca2+ and glycerol was first fabricated, and then, stearic acid (STA) was rivetted on the organohydrogel surface through (3-aminopropyl) triethoxysilane to obtain a dense hydrophobic coating (100 μm). The organohydrogel with hydrophobic skin presented better water spreading resistance and mechanical strength. In addition to the moisturizing effect of Ca2+ and glycerol, the skin also further blocks the contact between the organohydrogel and the air, thereby significantly enhancing the anti-dryness of the organohydrogel. Therefore, this organohydrogel has extremely outstanding structural, strength, and electrical conductivity stability. The developed strain sensor based on this organohydrogel can realize human motion monitoring capability at ultra-low temperature. This design idea, which combines multiple anti-drying mechanisms, has great expansion value for other gels suitable for various application scenarios.
研究领域:
材料科学
·
生物医学工程
·
电子器件
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产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Tao Huang,Rongrong Zheng,Haiyang Chang,Di Ma,Haijun Niu
For the lack of new chemical system, the primary battery can only use metal as negative materials and transition metal oxide as positive materials, resulting in mineral resources and environmental problems. Here, we reported an organic primary battery. The negative electrode was sodium tert-pentoxide and the positive electrode was citric acid, and it was a new full organic electrochemical system. By DFT calculation, it is determined that the sodium-oxygen binding energy of sodium tert-pentoxide is 58 kcal/mol, indicating that sodium tert-pentoxide can release electrons in electrochemical reaction. The existence of stable sodiation state at room temperature is a necessary condition for the negative electrode material of organic primary battery, and sodium tert-pentoxide meets this condition. The positive citric acid was prepared from fruit lemon, which was green and environment-friendly. The voltage of the organic primary battery is 1.1 V and the capacity is 79 mAhg −1 . Because both positive and negative materials are organic materials, the waste of organic primary batteries is easier to deal with than inorganic primary batteries.
研究领域:
材料科学
·
环境科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 3
·1266
·
IF 4.6
Lijun Song,Shiqi Liu,Li Zhang,Leiqing Pan,Long Xu
Polysaccharides are important bioactive components ofNitraria retusafruit (NRF). In this study, the ultrasonic-assisted extraction (UAE) conditions of polysaccharides fromNitraria retusafruit (NRFPs) were optimized by response surface methodology (RSM). The structural characteristics and antioxidant activity were investigated. The maximum NRFPs yield of 3.35% was obtained under the following optimal conditions: temperature of 59.5 °C, time of 30.5 min, liquid-to-solid ratio of 19.5 mL/g. Three polysaccharide fractions, NRFP-1 (20.01 kDa), NRFP-2 (28.96 kDa), and NRFP-3 (67.45 kDa), were isolated. Glucose, galactose, and arabinose in different percentages were identified as the primary monosaccharide units. The Fourier transform infrared spectrometer (FT-IR) and nuclear magnetic resonance (NMR) analysis indicated the presence of α- and β-glycosidic bonds in NRFPs. The NRFP-3 exhibited the highest scavenging activities against DPPH, ABTS, -OH free radicals, and Fe+3-reducing activity.Keywords:Nitraria retusafruit;polysaccharides;ultrasonic-assisted extraction;structure characterization;antioxidant activity
研究领域:
食品科学
·
生物化学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Ying Yu,Jinming Peng,Yangyang Jia,Qingyun Guan,Gengsheng Xiao,Chunmei Li,Shanshan Shen,Kaikai Li
This study investigated the structural and functional characteristics of two different molecular weight persimmon pectin extracted from unripe persimmon (PP-1) and ripe persimmon (PP-2). The molecular weight was determined as 117.8 kDa and 61.3 kDa for PP-1 and PP-2, which consisting of glucose, rhamnose, mannose, galactose, and xylose. AFM results indicated PP-1 with many linear chains, and short chains in while short chains, branching points, and heterogeneous clumps were found in PP-2. Emulsion characterization and storage stability experiments revealed that PP-1 with more stable emulsifying properties than PP-2 and commercial citrus pectin. In vitro fermentation of PP-1 and PP-2 by gut microbiota indicated that PP-1 and PP-2 groups were higher than inulin group in total SCFAs production after 48 h of fermentation. This study provided useful information for high value utilization of persimmon pectin.
研究领域:
食品科学
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植物化学
·
微生物学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF NATURAL PRODUCTS
·
2014
·
IF 3.947
Heng-Yi Yu,Zu-Yu Chen,Bin Sun,Junjun Liu,Fan-Yu Meng,Ye Liu,Tian Tian,An Jin,Han-Li Ruan
Two rare 7,8-seco-lignans (1, 2), three new lignan glycosides (3, 4a, 4b), and 10 known lignans (5–14) were isolated from the fruit of Schisandra glaucescens Diels. The absolute configurations of 1 and 2 were determined by comparing their experimental and calculated electronic circular dichroism spectra. The molecular structures of the new compounds (3, 4a, and 4b), including their absolute configurations, were determined using various spectroscopic methods and hydrolysis reactions. The antioxidant activities of the isolated compounds were tested using 2,2-diphenyl-1-picrylhydrazyl and ferric reducing antioxidant power assays. Compounds 4, 7, 8, 10, 11, and 12 exhibited antioxidant activities of varying potential in both assays. Of these compounds, 7 showed the strongest 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging capacity, with IC50 values of 15.7 (150 μM DPPH) and 34.6 μM (300 μM DPPH), respectively, and 4, 12, and 7 displayed higher total antioxidant activities than Trolox in the ferric reducing antioxidant power assay. The neuroprotective effects of these compounds against Aβ25–35-induced cell death in SH-SY5Y cells were also investigated. Compounds 1, 2, 6, 7, 8, 11, and 12 exhibited statistically significant neuroprotective effects against Aβ25–35-induced SH-SY5Y cell death compared with the group treated only with Aβ25–35.
✓ 已验证
DOI
PubMed
高影响因子
Foods
·
2024
·Vol. 13
·期 24
·4127
·
IF 4.7
Jianguo Huang,Rashid Khan,Chunhui Zhai,Xianting Ding,Li-Sha Zhang,Jin-Ming Wu,Zhizhen Ye
Developing and implementing technologies that can significantly reduce food loss during storage and transport are of paramount importance. Ozone synergistic catalytic oxidation (OSCO) technology has been developed, which sterilizes bacteria and viruses on the surface of food and degrades ethylene released during fruit storage through the active oxygen produced by the catalytic decomposition of ozone. Herein, we report the hydrothermal synthesis of MnO2with distinct phase compositions and nanostructures through simply varying the reaction temperatures. Optimized copper-doped α-MnO2nanorods exhibited remarkable efficacy in activating ozone at a concentration of 40 ppb, and this activation resulted in the complete eradication of indicator bacteria on food surfaces within a 24 h period. Moreover, these nanorods demonstrated high effectiveness in decomposing more than 80% of the ethylene molecules emitted by apples and bananas during the preservation period. The high concentration of surface oxygen vacancies is believed to contribute to the enhanced catalytic activity of the Cu-doped α-MnO2catalyst in the OSCO procedure by reducing ethylene production and maintaining the fruit quality during the preservation period.
研究领域:
食品科学
·
催化材料
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Sustainability
·
2024
·
IF 7.1
Xiao-Ping Zheng,Meng Li,Yu Chai,Ya-Peng Du,Yu-Cang Zhang,Yan-Zhen Zheng
Substituting renewable lignocellulose for fossil fuels is crucial for economic development and environmental protection. Deep eutectic solvents (DESs) demonstrate efficacy in facilitating the fractionation of high-purity lignin and cellulose during lignocellulose pretreatment. In this study, agricultural by-product passion fruit husks underwent pretreatment using DESs comprised of choline chloride (ChCl) and organic acids, aiming to efficiently separate cellulose and lignin. Among the various DESs tested, ChCl combined with lactic acid (LA) exhibited optimal performance in the pretreatment process. This combination demonstrated a remarkable synergistic effect in breaking down the lignin-carbohydrate complex bonds and deconstructing passion fruit husks. Characterizations of the cellulose rich solid residues were performed using FTIR, SEM, and XRD techniques, confirming the effectiveness of lignin removal and cellulose retention through the pretreatment. The regenerated lignin exhibited homogeneous distribution and well-preserved structure, as evidenced by 2D-HSQC analysis. Furthermore, it displayed notable antioxidant activity and antibacterial property. The mechanism underlying the pretreatment was elucidated through density functional theory (DFT) calculations, confirming hydrogen-bond interactions between DESs and lignin, which positively contributed to lignin dissolution. Additionally, hydrogen-bond properties between DESs and lignin were also revealed.
研究领域:
生物化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Junyan Guo,Mohammad Rizwan Khan,Naushad Ahmad,Wanli Zhang
In this work, sodium alginate (SA) composite films containing propolis extract (PRO) and graphene oxide (GO) were developed. Subsequently, the effects of PRO and GO on different properties of SA composite films were studied, and the films were characterized by scanning electron microscopy, fourier transform infrared spectroscopy, X-ray diffraction, and thermogravimetric analysis. The PRO release properties and fruit preservation performance of the developed composite films were also investigated. The results showed that the incorporation of PRO resulted in a 51.16% increase in tensile strength. The simultaneous incorporation of PRO and GO reduced water vapor permeability (WVP) by 22.56% compared to the SA film. The temperatures at which the SA/GO/PRO film lost 5% of its weight were 8.0°C higher than those of the SA film. The incorporation of GO into the SA/PRO composite film also modulates the release of PRO. Furthermore, the incorporation of PRO and GO improved the tensile strength of the SA film, as reflected in the microstructure of the films. The reduced WVP of the SA composite film allowed the packaged blueberries to exhibit less weight loss and shrinkage, thereby prolonging their shelf life.
研究领域:
食品科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD SCIENCE AND TECHNOLOGY-MYSORE
·
2018
·Vol. 56
·期 2
·754-762
·
IF 1.797
Siddeeg Azhari,Zeng Xin-An,Ammar Al-Farga,Han Zhong
The target of this research was to determine sugar profile, volatile compounds, minerals content and antioxidant properties of the Sukkari date flesh as methanolic and ethanolic extracts. Sukkari date showed sugar 78.32% (dry weight), while fibre, crude protein, ash and crude fat were 3.15, 3.01, 2.30 and 0.56, respectively. Glucose (51.80%), fructose (47.50%), while small amount sucrose, fucose and galacturonic acid were also detected. Potassium, calcium and magnesium were observed to be the predominant. Twenty-two components were identified; 5-Hydroxymethylfurfural was present in the highest amount (27.25%), followed by 4H-Pyran-4-one,2,3-dihydro-3,5-dihydroxy-6-methyl (9.45%). Total phenolic and flavonoid content of methanolic extract were 62.50 mg GAE/100 g and 3.20 mg CE/100 g, respectively, against 60.25 mg GAE/100 g and 2.90 mg CE/100 g respectively, for ethanolic extracts. Three assays including DPPH, reducing power and ABTS radical scavenging activities showed a good antioxidant activity of date palm extract. Sukkari date was observed to have good nutritional and antioxidant characteristics and can be utilize as potential nutrition.
研究领域:
食品科学
·
植物化学
·
营养学
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Junyan Guo,Mohammad Rizwan Khan,Naushad Ahmad,Wanli Zhang,Lanhuan Meng
Chitosan (CS) films functionalized with cinnamaldehyde (CIN)-derived Schiff base and Fe 3+ coordination were developed for pH-responsive antimicrobial food packaging. The Schiff base-Fe 3+ crosslinking system enhanced tensile strength by 39.59% and reduced water vapor permeability by 11.25%, while imparting pH-triggered CIN release via acid-hydrolyzable imine bonds. Scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, and thermogravimetric analysis confirmed uniform dispersion of CIN/Fe and improved crystallinity. The films demonstrated bactericidal activity against foodborne pathogens (89.52% for Escherichia coli ATCC 25922, 82.98% for Staphylococcus aureus ATCC 25923) combined with moderate 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) scavenging (37.41% at 30 min), suggesting primary application in antimicrobial packaging. In fruit preservation trials, strawberries and passion fruit coated with CS/CIN/Fe films showed 33.17% and 29.36% lower weight loss, respectively, extending shelf life by suppressing respiration-driven spoilage. Cytotoxicity (<0.21% hemolysis) and biocompatibility (>80% cell viability) validated safety. This work presents a sustainable strategy for intelligent packaging by integrating dynamic Schiff base-metal coordination, addressing both food waste and plastic pollution.
研究领域:
食品科学与技术
·
材料科学
·
活性包装
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可持续农业
·
高分子化学
✓ 已验证
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）