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Nutritional and amino acid contents of differently treated Roselle (Hibiscus sabdariffa L.)seeds


Ismail, Amin and Mohd Esa, Norhaizan and Hashim, Normah and Khairul Ikram, Hainida (2008) Nutritional and amino acid contents of differently treated Roselle (Hibiscus sabdariffa L.)seeds. Food Chemistry, 111 (4). pp. 906-911. ISSN 0308-8146 Online ISSN: 1873-7072


The effects of sun-drying and boiling sun-drying on the nutritional composition of Roselle (Hibiscus sabdariffa L.) seeds, grown from Malaysia, were investigated. The treatments were raw freeze-dried Roselle seeds (RRS), sun dried Roselle seeds (DRS) and boiled sun-dried Roselle seeds (BRS). Protein, lipids and dietary fibre were found to be high in all the treatments. The seeds, regarded as by-product of Roselle processing had 57.3% moisture. Raw freeze-dried, sun dried and boiled sun-dried seeds contained 6.81%, 9.9% and 9.8% moisture; 35.4%, 33.5% and 30.6% protein; 27.2%, 22.1% and 29.6% lipids; 2.3%, 13.0% and 4.0% available carbohydrate; 25.5%, 18.3%, and 19.2% total dietary fibre; and 7.4%, 7.5% and 6.6% ash, respectively. The carbohydrate, protein, lipids and moisture of RRS were significantly different (p < 0.05) from DRS and BRS. The predominant minerals in Roselle seeds were potassium (99–109 mg/100 g), magnesium (26–28 mg/100 g) and calcium (24–31 mg/100 g). The total dietary fibre of the seeds was within the acceptable range, with soluble and insoluble fibre ratios ranging from 1.2 to 3.3. The study detected 17 essential and nonessential amino acids. The seeds were rich in lysine (14–15 g/100 g), arginine (30–35 g/100 g), leucine (15.4–18.6 g/100 g), phenylalanine (11–12 g/100 g) and glutamic acid (21–24 g/100 g). The study indicated that Roselle seeds may serve as a potential source of functional ingredients.

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Additional Metadata

Item Type: Article
Subject: Roselle
Subject: Amino acids
Subject: Plants - Nutrition
Divisions: Faculty of Medicine and Health Science
DOI Number: https://doi.org/10.1016/j.foodchem.2008.04.070
Publisher: Elsevier Science Limited
Keywords: Roselle seeds; Differently treated seeds; Nutritional composition
Depositing User: Raja Norazlinda Raja Azenam
Date Deposited: 08 Aug 2012 03:09
Last Modified: 30 Sep 2015 07:10
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.foodchem.2008.04.070
URI: http://psasir.upm.edu.my/id/eprint/15870
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