scholarly journals Screening of Antioxidant Activity of 20 Kinds of Mushrooms from Southwest of China

2021 ◽  
pp. 26-32
Author(s):  
Dong-Hao He ◽  
Zhao-Hui Yu ◽  
Yi Huang
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Total Phenolic ◽  
Water Extracts ◽  
Serpula Lacrymans ◽  
Daldinia Concentrica

The ethanol and water extracts of 20 kinds of mushrooms from Sichuan Province, Southwest of China, were investigated for their antioxidant activity using DPPH assay. The results showed the ethanol extract of Serpula lacrymans, Daldinia concentrica, and Scleroderma verrucosum had well DPPH free radical scavenging activities 91.33%, 79.76% and 62.82%, respectively. Besides, the water extracts of Serpula lacrymans, Armillaria luteo-virens, and Lentinus edodes also possessed pretty high DPPH free radical scavenging activity were 95.59%, 88.76% and 86.93%, respectively. Based on the above comparison, the EC50 and total phenolic content of the ethanol extracts of Serpula lacrymans, Daldinia concentrica, and Scleroderma verrucosum were also measured. Their EC50 and total phenolic content valued of 17.87mg·mL-1, 11.19mg·mL-1 and 35.01mg·mL-1, as well as 0.0769μg·L-1, 0.0673μg·L-1 and 0.0545μg·L-1, respectively. The results showed there was a correlation between antioxidant activity and total phenolic content. Besides, the reaction time of the DPPH test affected the free radical scavenging, which reflected the difference of the extract component would impact the test method.

Phytochemical and antioxidant activity of Cadaba farinosa Forssk stem bark extracts

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Emmanuel M. Halilu ◽  
Abdullahi M. Abdurrahman ◽  
Sylvester N. Mathias ◽  
Chinenye J. Ugwah-Oguejiofor ◽  
Muntaka Abdulrahman ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Free Radical ◽  
Ethyl Acetate ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Radical Scavenging ◽  
Stem Bark ◽  
Free Radical Scavenging ◽  
Total Phenolic

Abstract Cadaba farinosa is used in traditional medicine for treatment of cancer, diabetes, and rheumatism. The research was aimed at evaluating the phytochemical and antioxidant activity of the extracts. The powdered stem bark was extracted successively with the aid of Soxhlet extractor using n-hexane, ethyl acetate, and methanol. The resulting extracts were concentrated on rotary evaporator and the percentage yields were calculated. The phytochemical and TLC profiles of the extracts were studied. The antioxidant activity of the extracts and ascorbic acid (standard) were determined using 2, 2-diphenyl-1-picrylhydrazyl (DPPH) free radical assay. The total phenolic content of the extracts and tannic acid (standard) were evaluated using Folin–Ciocalteu reagent. The percentage yields of n-hexane, ethyl acetate, and methanol extracts were found to be 1.19, 1.37, and 13.93%, respectively. The phytochemical screening revealed the presence of tannins, flavonoids, saponins, cardiac glycosides, alkaloids, and triterpenoids. The TLC profiles of the extracts revealed the presence of compounds as evidenced from their R f values. The total phenolic content of ethyl acetate and methanol extracts were found to be 135 and 112 mg, respectively. The free radical scavenging activity demonstrated by the extracts was comparable to ascorbic acid. The ethyl acetate extract had higher phenolic content and demonstrated the highest free radical scavenging with IC50 31.07 mg/mL. The results of research have provided strong preliminary evidence of antioxidant activity which may be because of phenolic compounds in the extracts.

Total Phenolic Content and Free Radical Scavenging Activity of Nelumbo nucifera Gaertn.

2019 ◽  
Vol 886 ◽  
pp. 52-55
Author(s):  
Khemjira Jarmkom ◽  
Nakuntwalai Wisidsri ◽  
Pattaranut Eakwaropas ◽  
Warachate Khobjai
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Total Phenolic ◽  
Significant Difference

All parts of N. nucifera are used as oriental medicine for various medicinal purposes. The aimed of this study was to determine phenolic compound and antioxidant activity of different parts of three lotus (N. nucifera including of Roseum Plenum (RP), Album Plenum (AP), and Hindu Lotus (HL)). Total phenolic content using Folin-Ciocalteu reagent method and free radical scavenging activities using DPPH assay were determined. Three deferent parts of lotus (leaves, stem, and flower) were determined. The result indicated that Roseum Plenum leaf showed the highest total phenolic contents and Roseum Plenum flower showed the highest antioxidant activities. Total phenolic content of different part of different of N. nucifera showed a significant difference (p < 0.05). It also was not uniform when compare between different of N. Nucifera. The results found that the total phenolic content was the opposite of antioxidant activity. This result may be attributed to antioxidant activity may not be from phenolic content. Therefore, it is important to research and develop the potential of lotus extraction in the future.

scholarly journals Antioxidant Rich Extracts of Terminalia ferdinandiana Inhibit the Growth of Foodborne Bacteria

Foods ◽  
2019 ◽  
Vol 8 (8) ◽  
pp. 281 ◽  
Author(s):  
Saleha Akter ◽  
Michael E. Netzel ◽  
Ujang Tinggi ◽  
Simone A. Osborne ◽  
Mary T. Fletcher ◽  
...  
Keyword(s):  
Free Radical ◽  
Antioxidant Capacity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Food Preservation ◽  
Total Phenolic ◽  
Foodborne Bacteria ◽  
Terminalia Ferdinandiana

Terminalia ferdinandiana (Kakadu plum) is a native Australian plant containing phytochemicals with antioxidant capacity. In the search for alternatives to synthetic preservatives, antioxidants from plants and herbs are increasingly being investigated for the preservation of food. In this study, extracts were prepared from Terminalia ferdinandiana fruit, leaves, seedcoats, and bark using different solvents. Hydrolysable and condensed tannin contents in the extracts were determined, as well as antioxidant capacity, by measuring the total phenolic content (TPC) and free radical scavenging activity using the 2, 2-diphenyl-1-picrylhydrazyl (DPPH) assay. Total phenolic content was higher in the fruits and barks with methanol extracts, containing the highest TPC, hydrolysable tannins, and DPPH-free radical scavenging capacity (12.2 ± 2.8 g/100 g dry weight (DW), 55 ± 2 mg/100 g DW, and 93% respectively). Saponins and condensed tannins were highest in bark extracts (7.0 ± 0.2 and 6.5 ± 0.7 g/100 g DW). The antimicrobial activity of extracts from fruit and leaves showed larger zones of inhibition, compared to seedcoats and barks, against the foodborne bacteria Listeria monocytogenes, Bacillus cereus, Methicillin resistant Staphylococcus aureus, and clinical isolates of Pseudomonas aeruginosa. The minimum inhibitory concentration and minimum bactericidal concentration in response to the different extracts ranged from 1.0 to 3.0 mg/mL. Scanning electron microscopy images of the treated bacteria showed morphological changes, leading to cell death. These results suggest that antioxidant rich extracts of Terminalia ferdinandiana fruits and leaves have potential applications as natural antimicrobials in food preservation.

Effect of 1-MCP on Bioavailability of Lingwu Long Jujube In Vitro Digestion

2012 ◽  
Vol 554-556 ◽  
pp. 1357-1360
Author(s):  
Zhong Li Jiang ◽  
Ai Li Wang ◽  
Xi Hong Li ◽  
Min Peng Zhu ◽  
Jun Wei Wang
Keyword(s):  
Free Radical ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Total Phenolic ◽  
Radical Scavenging Capacity ◽  
Scavenging Capacity ◽  
Control Samples

The present study investigated the effect of 1-MCP on bioavailability of Lingwu long jujube stored at 0 °C for 60 days. At the end of the storage, compared with the control samples, Lingwu long jujube treated with 1-MCP exhibited higher Vc bioaccessibility, total phenolic content and free radical scavenging capacity, which demonstrated that 1-MCP treatment could provide a better effect on maintaining the bioavailability of Lingwu long jujube.

In Vitro Antimicrobial and Antioxidant Activity of Commercial Rosemary Extract Formulations

2009 ◽  
Vol 72 (8) ◽  
pp. 1744-1752 ◽  
Author(s):  
ANJA KLANČNIK ◽  
BERNARDA GUZEJ ◽  
MAJDA HADOLIN KOLAR ◽  
HELENA ABRAMOVIČ ◽  
SONJA SMOLE MOŽINA
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Phenolic Content ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Free Radical Scavenging ◽  
Water Soluble ◽  
Total Phenolic ◽  
Gram Negative ◽  
Antimicrobial And Antioxidant Activity

Phenolic plant extracts are sources of natural bioactive compounds, which can inhibit the rate of food spoilage. MIC and MBC concentrations of four oil- or water-soluble rosemary (Rosmarinus officinalis) extracts against gram-positive (Bacillus and Staphylococcus) and gram-negative (Campylobacter and Salmonella) bacteria were determined by using disk diffusion, agar dilution, and broth microdilution methods, as well as bacterial survival kinetics in a macrodilution test. To describe the antioxidant properties of the extracts, the reducing power, free radical scavenging effectiveness, and β-carotene bleaching test were used. The antimicrobial and antioxidant activity depended on the concentration and chemical nature of the phenolic compounds in the extracts. Gram-positive bacteria were more sensitive than were gram-negative bacteria, especially for oil-soluble extracts with carnosic acid as the major phenolic compound. A microdilution method based on ATP measurement was found to be a useful, rapid technique for determining antibacterial efficiency, and its results correlated well with MICs from survival curve measurement. Reducing power and free radical scavenging effectiveness was higher in water-soluble formulations, according to their higher total phenolic content, but in an aqueous emulsion system of linoleic acid, they exhibited lower antioxidant activity. This correlated well with the higher efficiency of antimicrobial activity of oil-soluble formulations, despite the lower total phenolic content of these extracts.

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