Promising new applications of Castanea sativa shell: nutritional composition, antioxidant activity, amino acids and vitamin E profile
| Autor: | Nair Braga, M. Beatriz P.P. Oliveira, Francisca Rodrigues, Ana Palmeira-de-Oliveira, Joana Santos, Filipa B. Pimentel |
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| Rok vydání: | 2015 |
| Předmět: |
Flavonoids
chemistry.chemical_classification Antioxidant Portugal Plant Extracts Chemistry DPPH Vitamin E medicine.medical_treatment Flavonoid Catechin General Medicine Fagaceae Antioxidants chemistry.chemical_compound Botany medicine Vitamer Food science Gallic acid Amino Acids Leucine Nutritive Value Food Science |
| Zdroj: | Food & Function. 6:2854-2860 |
| ISSN: | 2042-650X 2042-6496 |
| DOI: | 10.1039/c5fo00571j |
| Popis: | The present study was aimed to assess the macronutrient composition and the amino acid and vitamin E profiles of Castanea sativa shell from different production regions of Portugal (Minho, Trás-os-Montes and Beira-Alta). The nutritional composition was similar for all samples, with a high moisture content and low fat amounts. Arginine and leucine were the predominant essential amino acids (EAA) accounting for 3.55-7.21% and 1.59-2.08%, respectively, for samples of the different production zones. All the shells presented high contents of vitamin E (481.5 mg per 100 g sample, 962.8 mg per 100 g sample and 567.5 mg per 100 g sample, respectively, for Minho, Trás-os-Montes and Beira-Alta). The predominant vitamer was γ-tocopherol (670 mg per 100 g sample for Trás-os-Montes). The antimicrobial and antioxidant activities of C. sativa shell were also determined. Trás-os-Montes extracts displayed the highest antioxidant activity (EC50 = 31.8 ± 1.3 μg mL(-1) for DPPH; 8083.5 ± 164.8 μmol per mg db for FRAP). The total phenolic content (TPC) varied from 241.9 mg to 796.8 mg gallic acid equivalents (GAE) per g db sample, the highest TPC being obtained for Trás-os-Montes. The total flavonoid content (TFC) varied from 31.4 to 43.3 mg of catechin equivalents (CEQ) per g db sample. No antimicrobial activity was observed. The results showed the potentialities of C. sativa shell extracts. |
| Databáze: | OpenAIRE |
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