Journal of Food Measurement and Characterization
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2021
·Vol. 15
·期 3
·2716-2726
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IF 2.431
Qian Junqing,Zhao Changyan,Zhu Hanxiao,Tong Jun,Zhao Xiaohua,Yang Haiyan,Guo Hui
Walnut oil is endowed with a variety of physiological functions due to abundant natural compounds, and the effect of unsaturated fatty acids is crucial. In order to accurately and conveniently detect the fatty acids components and content in walnut oil, a quantitative method was developed to detect fatty acids content based on the 1 H-NMR and 13 C-NMR techniques. In addition, HPLC combined with MS was used to conduct qualitative analysis. HPLC method with an evaporative light-scattering detector was for the quantitative analysis and the fatty acids content was compared with the content from NMR. The result showed that there was no significant difference between 1 H-NMR, 13 C-NMR and HPLC (P > 0.05) and indicated that the NMR has the potential to be applied as a routine method for the analysis of fatty acids content in walnut oil.
研究领域:
分析化学
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食品科学
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营养学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Evans Dovi,Aaron Albert Aryee,Alexander Nti Kani,Farid Mzee Mpatani,Jianjun Li,Zhaohui Li,Lingbo Qu,Runping Han
Several pollutants found in industrial wastewater , such as Congo red dyes (CR), have been shown to be toxic to organisms. To protect human health and the environment, industrial effluents must be purified before being released into bodies of water. In order to effectively remove CR from the solution, amino functionalized walnut shells (WNS) were synthesized. Batch and fixed-bed column systems were used in this research. The Langmuir isotherm model fits the experimental findings well in these two systems, whereas the pseudo-second-order and Thomas kinetic models characterize batch and column CR adsorption, respectively. The adsorption capacity of ACWNS toward CR was to 224.4 mg g −1 at 303 K from Langmuir model. Electrostatic interactions and hydrogen bonding may be the mechanisms. The column research showed that adsorption was more favorable at low inlet solution concentration, low flow rate, or high column depth. The column mass transfer capacity parameter (B) increased with increasing concentration (0.461, 1.59, and 2.47 for 50, 100, and 150 mg L −1 , respectively) owing to a greater driving force for CR adsorption onto ACWNS, while adsorbate–adsorbent affinity (β) exhibited a reverse trend. The regeneration property of CR-loaded ACWNS was excellent using NaOH solution. The thermodynamic study revealed that CR removal was both spontaneous and endothermic. ACWNS is promising to remove CR from the solution.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
Sustainable Chemistry and Pharmacy
·
2024
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IF 5.5
Jing Chen,Jin Zhang,Rundong Liang,Mingyue Ma,Yan Cui
The work established a new method combining MILs with ultrasound to effectively extract naphthoquinone pigments from green walnut husk. With the yield of juglone as the index, some parameters were optimized by single factor experiment with UV. Optimal extraction conditions were determined to be as follows: extraction solvent of [C 4 MIM] [FeCl 4 ], ratio of liquid to material of 10 mL/g, extraction temperature of 60 °C and extraction time of 60 min. Based on this method, the extraction yield of green walnut husk pigment was as high as 85.52% (g/g), which was a lot higher than that of heat-reflux extractions with ethanol and NaOH. Subsequently, the extracted pigment was used as a colorant in the hair dyeing combined with eugenol and tea polyphenol as natural accelerating agent and mordant. The process was optimized by orthogonal experiment, and the hair treated with the extracts got by MB-UA-E was the darkest when pH was kept at 5.0, the pigment concentration was 60%, the dyeing temperature was kept at 70 °C, and the dyeing time was 40 min. Compared to two products obtained by reflux extraction, the extracts got by MB-UA-E showcased superior black dyeing capacity, higher tensile strength, less damage to hair scales or α-keratin and greater UV protection property. It caused less damage to structural of hair fiber than commercial oxidative dye despite participation of conditioner in the oxidative dye. Our study could open new possibilities for using recycled walnut waste in the field of hair dyeing with an eco-friendly and efficient method.
研究领域:
化学
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材料科学
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环境科学
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化妆品科学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY
·
2024
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IF 1.8
Junqing Qian,Qian Li,Luyan Mo,Xiaohua Zhao,Jun Tong,Changyan Zhao,Hui Guo
Rich in unsaturated fatty acids, walnut oil provides a number of physiological benefits, including a reduction in the risk of cardiovascular disease and a delay in the aging process. In this work, walnut oil was prepared using the aqueous enzyme process and cold pressing method, and it was then analyzed using HPLC and FTIR. The characterization results show that the walnut oil extracted by the aqueous enzyme method outperformed the pressing oil in content of LLL by 11.64%, LLLn by 9.16% and OLL by 4.08%. But this oil had significantly less OLnLn (-) than the pressing oil (7.90%). The Morris water maze and shuttle box tests of ICR mice revealed a notable improvement in the memory of the animals administered walnut oil. Among them, mice fed the walnut oil extracted by aqueous enzyme method showed a much shorter escape latency and a significantly higher rate of active avoidance reaction ( p < 0.05, p < 0.01) than mice fed cold pressing method. With the prolongation of time, the mice even performed better than the positive control PIR group in all aspects. In summary, the quality of walnut oil extracted by aqueous enzyme method is better than that by cold pressing method. Practical Applications : Walnut oil prepared by aqueous enzymatic extraction can improve learning ability, is healthy and pollution-free, and can be utilized as a dietary supplement in ordinary life.
研究领域:
营养学
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生物化学
✓ 已验证
产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2024
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IF 6.9
Xueqian Wu,Zhen Li,Jiangyan Tao,Yufei Xie,Wei Liu,Songjian Zhao
The Fenton technology used for treating formaldehyde-containing wastewater (HCHO) has limitations in terms of pH, efficiency, and cost. To address these issues, a Fe x -HT Fenton-like catalyst was developed in this study. This catalyst combines active Fe with walnut shell biochar (HT) that contains surface defects, resulting in a highly effective solution for the rapid purification of formaldehyde wastewater in complex environments. The carbon defects on the HT surface play a crucial role in stabilizing the active Fe binding, while the appropriate loading of Fe further enhances the specific surface area of HT. Additionally, the porous structure of HT provides ample contact sites for formaldehyde. Furthermore, the Fe 3 -HT catalyst exhibits superparamagnetism, allowing for convenient recovery of the catalyst after use. Experimental results demonstrate that Fe 3 -HT achieves an impressive 90% degradation rate for systems containing HCHO concentrations ranging from 200 to 800 mg/L. The effects of feed ratio, pH, and formaldehyde concentration on the performance of Fe 3 -HT were thoroughly investigated. Moreover, a possible mechanism for the degradation of HCHO by the Fe 3 -HT Fenton-like catalyst was proposed. The environmentally friendly catalyst developed in this study boasts numerous advantages, including low cost, high treatment capacity for wastewater, and strong adaptability to complex wastewater environments.
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Haicun Yang,Mingyue Shi,Wenzhong Ma,Xudong Ma,Jinglong Zhang,Kaide Wu,Zheng Cao,Fanghong Gong,Qiuyan Bi
To overcome low adsorption capacity, slow adsorption rate, poor adsorption selectivity, and dissolution of peach gum polysaccharide (PGP), an amino-rich crosslinked PGP (ACPGP) was first synthesized by cross-linking highly soluble PGP. Subsequently, a cation-rich PGP (QCPGP) was prepared from ACPGP through the addition of glycidyltrimethyl ammonium chloride (GTAC) and a secondary quaternization. The step-by-step preparation process was confirmed, and the adsorption properties of PGP, ACPGP, and QCPGP were compared in detail. The adsorption of crude PGP for cationic dyes violet (MV, 135.0 mg/g) and methylene blue (MB, 121.4 mg/g) were spontaneous endothermic, following the pseudo-first-order kinetic model and D-R isotherm. Due to the presence of rich charged groups in their structure, their highly selective adsorption towards new coccine (NC) and tartrazine (TTZ) is spontaneous and endothermic, and can be described by the pseudo-first-order and pseudo-second-order kinetic models, respectively. According to the Langmuir isotherm, the Q m of ACPGP and QCPGP for NC and TTZ was calculated to be 876.2 and 1304.3 mg/g (NC), and 814.5 and 1136.7 mg/g (TTZ), respectively. QCPGP exhibited more advantages in terms of adsorption capacity, adsorption rate (equilibrium time of 10 min), environmental stability, adsorption selectivity, and regeneration efficiency, showing great potential in practical wastewater treatment applications.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Packaging and Shelf Life
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2022
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IF 8.749
Yingping Lai,Weitong Wang,Jiajia Zhao,Song Tu,Yingwu Yin,Liyi Ye
This work aims to develop degradable packaging films based on chitosan (CS) and Na-montmorillonite (MMT). The effect of citric acid (CA) on the properties of prepared films (MCS/CAs) was also investigated. MMT shows excellent compatibility in CS. Results from Fourier transform infrared spectroscopy , scanning electron microscopy , and thermogravimetric analysis indicated an improvement in the structural and thermal properties of the films after incorporating MMT into the CS matrix. Despite the reduced tensile strength , the composite films with CA loaded exhibited better swelling resistance and higher elongation at break (68%). MCS/CA-c (loaded with 80% CA) was employed to package cherry tomatoes so as to improve its conservation. Results showed improved physical/chemical properties (weight loss ratio, total soluble solids, titratable acidity, and ascorbic acid) of wrapped cherry tomatoes. Therefore, results reveal the potential of MCS/CAs films as degradable packaging material .
研究领域:
食品科学
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材料科学
✓ 已验证
DOI
高影响因子
Food Science & Nutrition
·
2022
·Vol. 10
·期 9
·3098-3105
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IF 3.553
Yongmin Wu,Yi Wu,Peng Han,Jiangqi Xu,Xiaobo Liang
The effects of edible coatings based on sodium alginate with ʻBaozhuʼ pear chitinase on the quality of cherry tomatoes during refrigerated storage were evaluated. Cherry tomatoes inoculated with Fusarium oxysporum were coated and stored up to 21 days. All coatings with the chitinase significantly reduced F . oxysporum proliferation on cherry tomatoes during storage and extended the shelf life of cherry tomatoes effectively ( p < .05). Results showed that alginate coatings with the chitinase could prevent weight loss, maintain firmness, and slow down the changes of titratable acidity and vitamin C ( p < .05) in a dose-dependent manner. However, no significant differences were observed between T3 (1% alginate/0.15% ʻBaozhuʼ pear chitinase/1% glycerin) and T4 (1% sodium alginate/0.3% ʻBaozhuʼ pear chitinase/1% glycerin) ( p > .05). Overall, alginate coating with 0.15% ʻBaozhuʼ pear chitinase could be a promising method to maintain the quality of cherry tomatoes.
研究领域:
食品科学
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植物病理学
✓ 已验证
DOI
高影响因子
Polymers
·
2019
·Vol. 11
·期 7
·1130
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IF 3.164
Dingyuan Zheng,Yangyang Zhang,Yunfeng Guo,Jinquan Yue
Herein, walnut shell (WS) was utilized as the raw material for the production of purified cellulose. The production technique involves multiple treatments, including alkaline treatment and bleaching. Furthermore, two nanocellulose materials were derived from WS by 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) oxidation and sulfuric acid hydrolysis, demonstrating the broad applicability and value of walnuts. The micromorphologies, crystalline structures, chemical functional groups, and thermal stabilities of the nanocellulose obtained via TEMPO oxidation and sulfuric acid hydrolysis (TNC and SNC, respectively) were comprehensively characterized. The TNC exhibited an irregular block structure, whereas the SNC was rectangular in shape, with a length of 55–82 nm and a width of 49–81 nm. These observations are expected to provide insight into the potential of utilizing WSs as the raw material for preparing nanocellulose, which could address the problems of the low-valued utilization of walnuts and pollution because of unused WSs.Keywords:Walnut shell;nanocellulose;TEMPO oxidation;sulfuric acid hydrolysis;ultrasonication
研究领域:
材料科学
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农业废弃物利用
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化学工程
✓ 已验证
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2020
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IF 6.306
Chaonan Su,Caihong Li,Kang Sun,Wenjing Li,Rongxia Liu
Walnut leaves are rich in phenolic components with antibiotic and antioxidative effects. However, few studies have reported the quantitative analysis of active components in walnut leaf. In this study, a novel method for quantifying the active components in walnut leaves was developed by combining ultra-high performance liquid chromatography-hybrid quadrupole-Orbitrap high-resolution mass spectrometry (UHPLC-Q-Orbitrap HRMS) with quantitative analysis of multi-components by a single marker (QAMS). In total, 13 bioactive components were analyzed by a single marker, quercetin. To evaluate the accuracy of this method, an auxiliary quantification method with 13 reference standards was established and validated. The standard method differences (SMDs) of the quantification results between QAMS and the auxiliary method were lower than 20%, indicating that the QAMS method can accurately determine the active components in walnut leaves. This method can provide a reference to address the absence of reference standards for analyzing other foods and herbs.
研究领域:
植物化学
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分析化学
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药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Foods
·
2021
·Vol. 10
·期 8
·1728
·
IF 4.35
Peng Wen,Teng-Gen Hu,Yan Wen,Ke-Er Li,Wei-Peng Qiu,Zhi-Lin He,Hong Wang,Hong Wu
An ethyl acetate extract from ofNervilia fordii(NFE) with considerable suppression activity on lipid peroxidation (LPO) was first obtained with total phenolic and flavonoid contents and anti-LPO activity (IC50) of 86.67 ± 2.5 mg GAE/g sample, 334.56 ± 4.7 mg RE/g extract and 0.307 mg/mL, respectively. In order to improve its stability and expand its application in antioxidant packaging, the nano-encapsulation of NFE within poly(vinyl alcohol) (PVA) and polyvinyl(pyrrolidone) (PVP) bio-composite film was then successfully developed using electrospinning. SEM analysis revealed that the NFE-loaded fibers exhibited similar morphology to the neat PVA/PVP fibers with a bead-free and smooth morphology. The encapsulation efficiency of NFE was higher than 90% and the encapsulated NFE still retained its antioxidant capacity. Fourier transform infrared spectroscopy (FTIR) and X-ray powder diffraction (XRD) analysis confirmed the successful encapsulation of NFE into fibers and their compatibility, and the thermal stability of which was also improved due to the intermolecular interaction demonstrated by thermo gravimetric analysis (TGA). The ability to preserve the fish oil’s oxidation and extend its shelf-life was also demonstrated, suggesting the obtained PVA/PVP/NFE fiber mat has the potential as a promising antioxidant food packaging material.Keywords:electrspinning;Nervilia fordiiextract;nano-encapsulation;antioxidant activity
研究领域:
食品科学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
Natural Products and Bioprospecting
·
2018
·Vol. 8
·期 6
·413-418
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IF 0
Wang Xia,Peng Xing-Rong,Lu Jing,Hu Gui-Lin,Qiu Ming-Hua
Abstract In present study, four new dammarane-type triterpenoids, namely caffruones A–D ( 1 – 4 ), were isolated from the cherries of Coffea arabica . Their structures were elucidated by extensive spectroscopic analysis including 1D, 2D NMR (HSQC, HMBC, 1 H– 1 H COSY, and ROESY), HRMS and IR spectra. This is the first time that tetracyclic triterpenes have been reported in genus Coffea . Graphical Abstract
研究领域:
植物化学
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天然产物研究
✓ 已验证
产品关联
DOI
PubMed
危险品化学品经营许可证（带存储）