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Full-Text Articles in Agriculture
Extraction Technology And Antioxidant Activity Of Polyphenols From Peony Seed Of Paeonia Ostii, Cai Ru-Yu, Chang Shi-Min, Song Chun-Li
Extraction Technology And Antioxidant Activity Of Polyphenols From Peony Seed Of Paeonia Ostii, Cai Ru-Yu, Chang Shi-Min, Song Chun-Li
Food and Machinery
In this study, ultrasound-assisted extraction of polyphenols from paeonia ostii oil peony seeds was used. On the basis of a single factor test, the material-liquid ratio, ultrasonic time, extraction temperature and ultrasonic power were set as independent variables, and the polyphenol yield was response value, optimize the extraction process of peony seed polyphenols by Box-Behnken response surface method. The results showed that the best conditions for extracting polyphenols from peony seeds were the ratio of material to liquid 1∶14 (g/mL), ultrasonic power 160 W, ultrasonic time 98 min, extraction temperature 57 ℃. Under the best technological conditions, the extraction rate …
Extraction And Antioxidant Activities Of Polyphenol From Magnolia Kwangsiensis Figlar & Noot. Branch, Zheng Yan-Fei, Zhang Qiang, Lan Liang-Mei, Xu Jian-Ben, Huang Qiu-Ping, Lin Yi-Na
Extraction And Antioxidant Activities Of Polyphenol From Magnolia Kwangsiensis Figlar & Noot. Branch, Zheng Yan-Fei, Zhang Qiang, Lan Liang-Mei, Xu Jian-Ben, Huang Qiu-Ping, Lin Yi-Na
Food and Machinery
The extraction of polyphenols from the branches of Magnolia kwangsiensis figlar & noot. (M. kwangsiensis) was studied by ultrasonic-assisted extraction. The extraction condition was optimized by response surface methodology. The antioxidant activities of M. kwangsiensis branch polyphenols were evaluated in aspect of total antioxidant activity, DPPH· scavenging activity and ·OH scavenging effect. Results showed the optimum conditions were acetone concentration 67%, liquid-solid ratio 22 (mL/g), extraction time 20 min, and the yield of polyphenols reached 1.45%. The polyphenols from the branches of M. kwangsiensis had certain total antioxidant activity, but had good scavenging effects on DPPH· and ·OH.
Anti-Inflammatory Effect And Molecular Mechanism Of Durian Hull Polyphenols On Lps-Induced Raw 264.7 Macrophages, Liu Wen-Qiang, Zhang Yi-Ling, Xiong Hua, Zhu Xue-Mei, Sun Yong
Anti-Inflammatory Effect And Molecular Mechanism Of Durian Hull Polyphenols On Lps-Induced Raw 264.7 Macrophages, Liu Wen-Qiang, Zhang Yi-Ling, Xiong Hua, Zhu Xue-Mei, Sun Yong
Food and Machinery
In this study, polyphenols from Durian hull were extracted by 80% methanol, and their antioxidant and anti-inflammatory activities were investigated based on in vitro antioxidant assays and LPS-stimulated RAW 264.7 cells model. The results demonstrated that durian hull extract was rich in polyphenols, it showed strong antioxidant activity in vitro and it could reduce the expression level of inducible nitricoxide synthase (iNOS) and cyclooxygenase-2 (COX-2), decrease the NO production, and also lower the pro-inflammatory cytokines (TNF-α, IL-1β and IL-6) at the mRNA and protein levels. At the same time, it can inhibit the phosphorylation of IκB and p65 proteins related …
Changes In Microbiota Community Structure And Antioxidant Activity Of Polyphenols From Litchi Pericarp During Degradation With Human Fecal Microbiota In Vitro, Huang Xiao-Xia, Li Xiao-Le, Li Wu, Yang Rui-Li
Changes In Microbiota Community Structure And Antioxidant Activity Of Polyphenols From Litchi Pericarp During Degradation With Human Fecal Microbiota In Vitro, Huang Xiao-Xia, Li Xiao-Le, Li Wu, Yang Rui-Li
Food and Machinery
To reveal the changes in microbiota community structure and antioxidant activity of polyphenols from litchi pericarp during culture with human fecal microbiota, litchi pericarp polyphenols were added into the mixed medium of intestinal microbiota solution prepared from fresh feces of healthy volunteers for the anaerobic culture in vitro. The total phenol content and antioxidant activities were measured at 0, 4, 8, 12, 24 and 48 h. The change of intestinal microbiota was analyzed by high-throughput sequencing. The results showed that the total phenol content significantly decreased within 0~48 h and the antioxidant activity was also reduced but did not attain …
Optimization On Ultrasonic-Assisted Extraction Of Polyphenols From Cyclobalanopsis Glauca Shells By Response Surface Methodology And Study On Its Antioxidant Activity In Vitro, Ru Yue-Rong, Zhang Zhi-Yang, Yang Jin-Mei, He Bin, Kan Huan, Liu Yun, Wang Zhen-Xing, Zhang Xue-Chun
Optimization On Ultrasonic-Assisted Extraction Of Polyphenols From Cyclobalanopsis Glauca Shells By Response Surface Methodology And Study On Its Antioxidant Activity In Vitro, Ru Yue-Rong, Zhang Zhi-Yang, Yang Jin-Mei, He Bin, Kan Huan, Liu Yun, Wang Zhen-Xing, Zhang Xue-Chun
Food and Machinery
The ultrasound-assisted extraction was applied to the extraction of polyphenols from the Cyclobalanopsis glauca fruit shells. The effects of the concentration of ethanol, solid-liquid ratio, ultrasonic time, and number of extraction cycles on the yield of phenolic yield were studied, and the extraction process was optimized by response surface methodology (RSM). Then the in vitro antioxidant activities of Cyclobalanopsis glauca shell fruit extract (CGSE), including ferric ion reducing antioxidant power (FRAP) and oxygen radical absorbance capacity (ORAC), were evaluated. Results: The optimal extraction process were as followed: volume fraction of ethyl alcohol 50%, extracting time 25 min, solid-liquid ratio 1:40, …
Antioxidant And Antibacterial Activity Of Polyphenols From Lyophyllum Cinoraseens Konr & Maubl, Li Yan-Po, Huang Yan, Cheng Lu-Jie, Sun Yi-Ting
Antioxidant And Antibacterial Activity Of Polyphenols From Lyophyllum Cinoraseens Konr & Maubl, Li Yan-Po, Huang Yan, Cheng Lu-Jie, Sun Yi-Ting
Food and Machinery
In order to investigate the antioxidation and antibacterial effect of polyphenols from Lyophyllum Cinoraseens Konr & Maubl, crude polyphenols after ultrasonic-assisted ethanol extraction purified polyphenols with macroporous resin were used as raw materials to study the scavenging effect for ·OH, O · and DPPH· and antibacterial effect by the filter paper disc method. The results showed that crude polyphenols and purified polyphenols from Lyophyllum Cinoraseens Konr & Maubl both exhibit the scavenging effect for ·OH, O · and DPPH·, and there presented certain dose-effect relationship between scavenging ability and the concentration of polyphenols. Crude polyphenols and purified polyphenols showed …