Determination of phenolic compounds profile in chestnut and floral honeys and their antioxidant and antimicrobial activities

2016 ◽  
Vol 41 (3) ◽  
pp. e12345 ◽  
Author(s):  
Mesut Ertan Güneş ◽  
Saliha Şahin ◽  
Cevdet Demir ◽  
Ebru Borum ◽  
Aycan Tosunoğlu
Foods ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 781
Author(s):  
Jaturong Kumla ◽  
Nakarin Suwannarach ◽  
Keerati Tanruean ◽  
Saisamorn Lumyong

Tropical black bolete, Phlebopus portentosus, provides various nutritional benefits and natural antioxidants to humans. In this study, the chemical composition, phenolic compounds, and antioxidant and antimicrobial activities of fresh mushroom samples and samples stored for a period of one year using different preservation methods (drying, brining, and frozen) were investigated. The results indicated that the brining method significantly reduced the protein and fat contents of the mushrooms. The polyphenol and flavonoid contents of the frozen sample were not significantly different from that of the fresh sample. The results revealed that an inhibition value of 50% (IC50) for the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay of the extract of the dried and frozen samples was not statistically different from that of the fresh sample. The IC50 value of 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) assay and ferric reducing antioxidant power (FRAP) value in the extract of the frozen sample were not found to be significantly different from those of the fresh sample. Furthermore, the lowest degree of antioxidant activity was found in the extract of the brined sample. Additionally, the antimicrobial activities of the extracts of the fresh and frozen samples were not significantly different and both extracts could have inhibited the growth of all tested Gram-positive bacteria and Pseudomonas aeruginosa.


RSC Advances ◽  
2020 ◽  
Vol 10 (68) ◽  
pp. 41430-41442
Author(s):  
Momna Rubab ◽  
Ramachandran Chelliah ◽  
Kandasamy Saravanakumar ◽  
Jong-Rae Kim ◽  
Daesang Yoo ◽  
...  

Brassica vegetables are well-characterized, containing a wide-spectrum of phenolic compounds that are responsible for their diverse biological activities like antioxidant and antimicrobial activities.


2020 ◽  
Vol 136 ◽  
pp. 111050 ◽  
Author(s):  
Jian Li ◽  
Shi-Ying Huang ◽  
Qianying Deng ◽  
Guiling Li ◽  
Guocheng Su ◽  
...  

Antioxidants ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 178
Author(s):  
Vanessa Silva ◽  
Rupesh Kumar Singh ◽  
Nelson Gomes ◽  
Bruno Gonçalves Soares ◽  
Adriana Silva ◽  
...  

Chitosan, a natural polysaccharide, has been previously proposed as an elicitor in plants to prevent pathogen infections. The present study aimed to analyze the effect of chitosan solution and chitosan nanoparticles treatment applied on the grapevine variety Sousão with respect to the phenolic composition, antioxidant potential and antibacterial activity of its individual grape components. Grapevine plants of selected lines were sprayed with chitosan solution and chitosan nanoparticles, and ethanolic extracts of stems, seeds and skins were prepared from grapevines treated and not treated with chitosan. Total phenolic, anthocyanin and tannin contents were studied, and the identification of the individual phenolic compounds was performed by HPLC-DAD. The antimicrobial susceptibility method was performed using the Kirby-Bauer disc diffusion method against multidrug-resistant bacteria. Overall, there was small increase in the concentration of phenolic compounds, antioxidant and antimicrobial activities in grape components treated with chitosan solution. Seed extracts showed the highest antioxidant and antimicrobial activities. The studied individual components obtained from chitosan-treated grapevines could represent an added value due to the increased antioxidant and antibacterial potentials. The phenolic compounds found in components may be used in food and pharmaceutical industries as natural food preservers and antibiotic adjuvants.


2016 ◽  
Vol 2 (1) ◽  
Author(s):  
Abdurrahman Dundar ◽  
Veysi Okumus ◽  
Sadin Ozdemir ◽  
Kadir Serdar Celik ◽  
Mehmet Bo��a ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document