Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Institution
Articles 1 - 12 of 12
Full-Text Articles in Food Processing
Study On Antioxidant Activity And Synergistic Effect Of Flavonoids From Zanthoxylum Armatum Dc, Zhou Meng-Jiao, He Xin-Zhu, Li Chao-Jun, Liang Xiao-Feng
Study On Antioxidant Activity And Synergistic Effect Of Flavonoids From Zanthoxylum Armatum Dc, Zhou Meng-Jiao, He Xin-Zhu, Li Chao-Jun, Liang Xiao-Feng
Food and Machinery
Objective: This study aimed to investigate the antioxidation and synergistic effect of flavonoid extract of Zanthoxylum armatum DC. Methods: DPPH radical and ABTS radical scavenging methods were used to evaluate the antioxidant activity of flavonoids extract from Z. armatum, and the synergies of flavonoids extract with vitamin C and rutin complex were studied by adding method. Results: The semi-inhibitory concentrations of DPPH free radical and ABTS free radical IC50 were 0.03 and 0.062 mg/mL, respectively, showing strong antioxidant activity. The antioxidant activity of the complex composed of flavonoid extract and vitamin C or rutin was high, and the …
Extraction And Composition Analysis Of Flavonoids In Peony Seed Shells, Zou Ping, Zhang Ying-Yang, Zou Lin-Ling
Extraction And Composition Analysis Of Flavonoids In Peony Seed Shells, Zou Ping, Zhang Ying-Yang, Zou Lin-Ling
Food and Machinery
Objective: To extract natural flavonoid compounds （MDZK） from peony seed husks for composition analysis and antioxidant research. Methods: The total flavonoids of peony seed shell were extracted by solvent reflux extraction method. The ultraviolet-visible spectrophotometer method was used to determine the MDZK content and antioxidant properties; The total flavonoids extracted were analyzed by LC-MS method. Results: When the solvent was 70% ethanol, the extraction temperature was 70 ℃, the feed-to-liquid ratio was 1∶25 （g/mL）, and the extraction time was 60 min, the MDZK yield was the highest, which was （10.54±0.13）%. When the concentration of MDZK reached 120 μg/mL, the highest …
Optimization Of Extraction Conditions And Antioxidant Activity Of Curcuma Longa Polysaccharides And Flavonoids By Response Surface-Satisfaction Function, Min-Na Hou, Shao-Ping Hou, Man-Fang Wu, Shan Wang, Xiu-Juan Peng, Feng Liu, Huan-Huan Yan
Optimization Of Extraction Conditions And Antioxidant Activity Of Curcuma Longa Polysaccharides And Flavonoids By Response Surface-Satisfaction Function, Min-Na Hou, Shao-Ping Hou, Man-Fang Wu, Shan Wang, Xiu-Juan Peng, Feng Liu, Huan-Huan Yan
Food and Machinery
The ethanol concentration, solid-liquid ratio, ultrasonic time and temperature were optimized by response surface-satisfaction function with extraction rate of polysaccharide and flavonoid from Curcuma Longa as response values. The results showed that the optimum extraction conditions of C. Longa polysaccharide and flavonoids were as follows: water as extraction solvent, ultrasonic temperature 50 ℃, material-liquid ratio 1∶22 (g/mL), ultrasound time 20 min. The extraction rate of polysaccharide and flavones were 1.01% and 0.23% respectively, and the satisfactory degree is 0.823 7. The difference between the predicted value was very small, which showed that the extraction process was reliable and feasible. The …
Study On Antioxidant Effect Of Flavonoids From Artemisia Argyi And Its Application In Preservation Of Fresh Grade Breast, Yu-Hua Yang, Yan Huang, Wei-Peng Zheng
Study On Antioxidant Effect Of Flavonoids From Artemisia Argyi And Its Application In Preservation Of Fresh Grade Breast, Yu-Hua Yang, Yan Huang, Wei-Peng Zheng
Food and Machinery
In this paper, the total reducing power, O ·, ·OH and DPPH· scavenging capacity of the flavonoids from Artemisia argyi were studied by ultrasonic assisted extraction and macroporous resin purification. The changes of pH values, TBARS, TVB-N, redness value, hydrogen sulfide and other physical and chemical indexes of fresh grade breast and its effects on sensory quality were investigated .The results showed that the purified flavonoids from Artemisia argyi had a strong total reduction power and a good linear relationship, with the good scavenging ability for O ·, ·OH, and DPPH·, and the scavenging ability has a certain dose-effect relationship …
Research Progress On Active Ingredients And Pharmacological Functions Of Lotus Leaf, Li Yi-Long, Shang Bo-Hao, Wang Jian-Hui, Liu Zhong-Hua, Zhu Ming-Zhi
Research Progress On Active Ingredients And Pharmacological Functions Of Lotus Leaf, Li Yi-Long, Shang Bo-Hao, Wang Jian-Hui, Liu Zhong-Hua, Zhu Ming-Zhi
Food and Machinery
The main active ingredients in lotus leaves were introduced in this review, including flavonoids, alkaloids, volatile oils, terpenoids, polysaccharides, and organic acids. The pharmacological functions of lotus leaves, such as lipid-lowering and anti-obesity activities, anti-oxidant, anti-bacterial, and blood-lowering activities, protective effects of the cardiovascular system, nervous system, and liver, and anti-tumor activity were also summarized. The relative research and application were prospected in order to provide references for the comprehensive utilization of lotus leaf resources.
Research Progress On New Extraction Technologies And Bioactivities Of Flavonoids From Orange, Liu Dan, Guo Huan, Wu Di, Gan Ren-You
Research Progress On New Extraction Technologies And Bioactivities Of Flavonoids From Orange, Liu Dan, Guo Huan, Wu Di, Gan Ren-You
Food and Machinery
The new extraction technologies of citrus flavonoids in recent five years were reviewed, including low eutectic solvent extraction, subcritical fluid extraction and magnetic molecular blot selective extraction.the bioactivities and mechanisms of citrus flavonoids, such as antioxidant, anti-inflammatory, antibacterial, anti-obesity, anti-diabetes, anti-cancer, intestinal protection, cardiovascular protection, liver protection and neuroprotection, were also expounded, and suggestions for further study of citrus flavonoids were proposed.
Optimization Of Recrystallization Process Of Flavonoids From Guanxi Pomelo, Hu Yang, Zheng Liyan, Yang Yuanfan, Wu Jinhui, Ni Hui
Optimization Of Recrystallization Process Of Flavonoids From Guanxi Pomelo, Hu Yang, Zheng Liyan, Yang Yuanfan, Wu Jinhui, Ni Hui
Food and Machinery
Objective:This study aimed to improve the recrystallization yield and purity of flavonoid.Methods:Taking the crude flavonoids from pomelo peel extracted by ultrasonic-assisted ethanol extraction as raw materials, the process parameters of ethanol recrystallization and purification of flavonoids were optimized by response surface methodology.Results:The main factors affecting the recrystallization yield of flavonoids were ethanol concentration, crystallization time, pH value, and the interaction between ethanol concentration and pH value, among which, the ethanol concentration affacted most significantly.Conclusion: The optimal recrystallization conditions of flavonoids were as follows: ethanol volume fraction of 24%, liquid-solid ratio of 10∶1 (mL/g), …
Simultaneous Determination Of 6 Flavonoids In Health Care Products By High Performance Liquid Chromatography, Wu Yi-Qi, Liang Zhi-Sen, Chen Yu-Zhen, Zhou Rui, Lin Xiao-Jun
Simultaneous Determination Of 6 Flavonoids In Health Care Products By High Performance Liquid Chromatography, Wu Yi-Qi, Liang Zhi-Sen, Chen Yu-Zhen, Zhou Rui, Lin Xiao-Jun
Food and Machinery
Objective: To establish a method for simultaneous determination of wogonoside, 4'-hydroxywogonin, norwogonin, baicalein, wogonin and chrysin in health care products by high performance liquid chromatography (HPLC). Methods: The samples were extracted with acetone, C18 solid phase extraction column was used for purification. The target compounds were determined by HPLC, quantified by matrix-matched standard curve method. Phenomenex Luna®C18(250 mm×4.6 mm, 5 μm)column was applied, mobile phase was acctonitrile-acetic acid, using gradient elution)at the flow rate of 1.0 mL/min. The temperature of column was 30 ℃ and the detection wavelength was set at 280 nm. …
Explore The Inhibitory Effect Of Perilla Crude Extract On Metabolic Syndrome-Related Enzymes Based On Molecular Docking, Yu Yu-Ting, Zhang Yanl, Zhang Ying, Li Na-Na, Cheng Yan, Zheng Meng-Di, Yan Ping, Chai Xi-Yan
Explore The Inhibitory Effect Of Perilla Crude Extract On Metabolic Syndrome-Related Enzymes Based On Molecular Docking, Yu Yu-Ting, Zhang Yanl, Zhang Ying, Li Na-Na, Cheng Yan, Zheng Meng-Di, Yan Ping, Chai Xi-Yan
Food and Machinery
Objective:The research is to explore the enzyme inhibition of Perilla crude extract, and to preliminarily elucidate the pharmacological substance basis of them on hyperglycemia, hyperuric acid and hyperlipidemia.Methods:The content of flavonoids and phenolic acid in UV extract was determined and showed the active components associated with enzyme inhibition. In vitro experiments, the inhibition of Perilla extracts on different enzyme activity was determined and the inhibitory activity was evaluated by IC50. Molecular docking was used to predict the targets of Perilla crude extract on pancreatic lipase and amylase inhibition.Results:Flavone content in the crude UV extract was …
Research Progress On Separation And Purification Of Flavonoids By Nano-Solid-Phase Extractant, Luo Shi-Hua, Wang Yi-Xuan, Cui Bo, Xu Zhou, Jiao Ye, Cheng Yun-Hui
Research Progress On Separation And Purification Of Flavonoids By Nano-Solid-Phase Extractant, Luo Shi-Hua, Wang Yi-Xuan, Cui Bo, Xu Zhou, Jiao Ye, Cheng Yun-Hui
Food and Machinery
The article summarized the classification of flavonoids and their physiological activities in recent years. The classification, adsorption mechanism and application effects of nano-solid-phase extractant in the separation and purification of flavonoids were reviewed, and the development trend of the separation and purification on flavonoids by nano-solid-phase extractant was analyzed.
Research Of The Extraction Process And Stock Of Phenolic Compounds Of Localized Wine-Technical Red And White Varieties Of Grapes, Abdullayev Umid
Research Of The Extraction Process And Stock Of Phenolic Compounds Of Localized Wine-Technical Red And White Varieties Of Grapes, Abdullayev Umid
CHEMISTRY AND CHEMICAL ENGINEERING
The aim of the study was to determine the technological stock of phenolic compounds in European technical grape varieties grown in the climatic conditions of Uzbekistan, used to produce white and red wines. UV-Vis spectrophotometric method determined the total content of phenolic compounds in localized wine-technical grape varieties. Using high performance liquid chromatography (HPLC), the qualitative and quantitative content of groups and subgroups of phenolic compounds was studied, biologically active components obtained in the process of their extraction were identified, and studies were carried out to analyze the types of phenolic compounds by chromatographic separation in certain wine-technical grape varieties. …
Ultrasonic-Assisted Extraction Technology Optimization And Antioxidant Activity Of Total Flavonoids From Cleome Viscosa, Xu Jian-Ben, Su Xiu-Fang, Huang Mei-Jiao
Ultrasonic-Assisted Extraction Technology Optimization And Antioxidant Activity Of Total Flavonoids From Cleome Viscosa, Xu Jian-Ben, Su Xiu-Fang, Huang Mei-Jiao
Food and Machinery
Total flavonoids were extracted from Cleome viscosa by ultrasound-assisted extraction. The optimum extraction conditions were investigated based on single factor and orthogonal tests. Meanwhile, the antioxidant activities of total flavonoids were evaluated by studying hydroxyl radical (·OH) scavenging assay, 1,1-diphenyl-2-picrylhydrazyl free radical (DPPH·) scavenging assay and nitrite scavenging assay. The results showed that the extraction rate of total flavonoids of Cleome viscosa was (2.711±0.002)% under the following conditions: material-to-liquid ratio of 1:15 (g/mL), ethanol concentration of 50%, extraction power of 40 W, ultrasonic time of 50 min, extraction temperature of 50 ℃. Total flavonoids of Cleome viscosa exhibited obvious ·OH …