Antioxidant Properties of Polyphenolic Extracts from Quercus Laurina, Quercus Crassifolia, and Quercus Scytophylla Bark
| Autor: | Juan de Dios Figueroa-Cárdenas, Rafael Salgado-Garciglia, Esperanza Meléndez-Herrera, M. G. Garnica-Romo, Eréndira Valencia-Avilés, Martha Estrella García-Pérez, Héctor Eduardo Martínez-Flores |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
scavenging ability
Physiology Clinical Biochemistry Ethyl acetate Biochemistry Quercus chemistry.chemical_compound 0404 agricultural biotechnology Chlorogenic acid Maceration (wine) Gallic acid Phenols Food science Molecular Biology polyphenols Chemistry lcsh:RM1-950 04 agricultural and veterinary sciences Cell Biology 040401 food science lcsh:Therapeutics. Pharmacology Proanthocyanidin Polyphenol Quercetin oak bark |
| Zdroj: | Antioxidants Volume 7 Issue 7 Antioxidants, Vol 7, Iss 7, p 81 (2018) |
| ISSN: | 2076-3921 |
| DOI: | 10.3390/antiox7070081 |
| Popis: | The objective of this work was to determine the concentration of total phenols, total flavonoids, hydroxycinnamic acids, and proanthocyanidins present in crude extracts of Quercus laurina, Q. crassifolia, and Q. scytophylla bark. They were extracted by ethanol (90%) maceration and hot water. The antioxidant capacity was determined by the ability to capture OH&bull O2&bull &minus ROO&bull H2O2, NO&bull and HClO. The hot water crude extract of Q. crassifolia was chosen to be concentrated and purified due to its higher extraction yield (20.04%), concentration of phenol compounds (747 mg gallic acid equivalent (GAE)/g, 25.4 mg quercetin equivalent (QE)/g, 235 mg ChAE/g, 25.7 mg chlorogenic acid equivalents (ChAE)/g), and antioxidant capacity (expressed as half maximal effective concentration (EC50, µ g/mL): OH&bull = 918, O2&bull = 80.5, ROO&bull = 577, H2O2 = 597, NO&bull &ge 4000, HClO = 740). In a second stage, Q. crassifolia extracted with hot water was treated with ethyl acetate, concentrating the phenol compounds (860 mg GAE/g, 43.6 mg QE/g, 362 ChAE/g, 9.4 cyanidin chloride equivalents (CChE)/g) and improving the scavenging capacity (OH&bull = 467, O2&bull = 58.1, ROO&bull = 716, H2O2 = 22.0, NO&bull 4000, HClO = 108). Q. crassifolia had the highest polyphenolic concentration and the better capacity for scavenging reactive species, being a favorable candidate to be considered in the development of new products. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|