Nutritional and amino acid contents of differently treated Roselle (Hibiscus sabdariffa L.)seeds
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). Prote...
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Main Authors: | , , , |
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Format: | Article |
Language: | English English |
Published: |
Elsevier Science Limited
2008
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Online Access: | http://psasir.upm.edu.my/id/eprint/15870/1/Nutritional%20and%20amino%20acid%20contents%20of%20differently%20treated%20Roselle.pdf http://psasir.upm.edu.my/id/eprint/15870/ http://www.sciencedirect.com/science/article/pii/S0308814608005268 http://dx.doi.org/10.1016/j.foodchem.2008.04.070 |
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Summary: | 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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