| Microstructure, nutrient composition and antioxidant capacity of king palm flour: a new potential source of dietary fibre. | |
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MedLine Citation:
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PMID: 20219363 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The objective of this research was to evaluate the chemical composition, microstructure, and antioxidant capacity of king palm flour obtained from residues from organic king palm (Archontophoenix alexandrae) processing. King palm flour exhibited high levels of dietary fibre (70.85%) and total ash (3.27%); low contents of protein (3.51%) and lipid (0.91%). Iron, magnesium, calcium and potassium contents were 7.31, 517.03, 801.33 and 1041.95 mg/100g, respectively. The high concentration of glucose, xylose and arabinose suggests the presence of some polysaccharides, such as cellulose and hemicelluloses (xyloglucans and arabinoxylans). Methanol and aqueous extracts of king palm flour showed 1.27 and 0.95 mg/g (Gallic Acid Equivalents) of total polyphenols, respectively. Methanol extract yielded the best antioxidant activity in the 2,2-diphenyl-1-picrylhydrazyl (DPPH()) and 2,2'-azino-di(3-ethylbenzthiazoline sulphonate) (ABTS()(+)) methods. The micrographs of leaf sheath showed the presence of druses, which are characterized as calcium oxalate deposition, contributing to the calcium content in king palm flour. The presence of primary and secondary cell walls lignified in leaf sheath contributed to high levels of dietary fibre detected in king palm flour. |
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Authors:
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Karina N de Simas; Leila do N Vieira; Rossana Podestá; Manoela A Vieira; Ismael I Rockenbach; Carmen L O Petkowicz; João de Deus Medeiros; Alícia de Francisco; Edna R Amante; Renata D M C Amboni |
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Publication Detail:
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Type: Journal Article Date: 2010-03-09 |
Journal Detail:
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Title: Bioresource technology Volume: 101 ISSN: 1873-2976 ISO Abbreviation: Bioresour. Technol. Publication Date: 2010 Jul |
Date Detail:
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Created Date: 2010-04-12 Completed Date: 2010-11-03 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9889523 Medline TA: Bioresour Technol Country: England |
Other Details:
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Languages: eng Pagination: 5701-7 Citation Subset: IM |
Copyright Information:
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Copyright (c) 2010 Elsevier Ltd. All rights reserved. |
Affiliation:
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Department of Food Science and Technology, Federal University of Santa Catarina, Rodovia Admar Gonzaga 1346, 88034-001 Florianópolis, SC, Brazil. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Antioxidants
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chemistry* Benzothiazoles / chemistry Biphenyl Compounds / chemistry Calcium / chemistry Cell Wall / chemistry Cellulose / chemistry Dietary Fiber* Flavonoids / chemistry Flour* Food Glucans / chemistry Methanol / chemistry Microscopy, Fluorescence / methods Nutritional Sciences Phenols / chemistry Picrates / chemistry Plant Leaves / metabolism Sulfonic Acids / chemistry Xylans / chemistry |
| Chemical | |
Reg. No./Substance:
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0/Antioxidants; 0/Benzothiazoles; 0/Biphenyl Compounds; 0/Flavonoids; 0/Glucans; 0/Phenols; 0/Picrates; 0/Sulfonic Acids; 0/Xylans; 0/polyphenols; 1898-66-4/2,2-diphenyl-1-picrylhydrazyl; 28752-68-3/2,2'-azino-di-(3-ethylbenzothiazoline)-6-sulfonic acid; 67-56-1/Methanol; 7440-70-2/Calcium; 9004-34-6/Cellulose; 9040-27-1/arabinoxylan |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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