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Abstract Detail


Stress Tolerance

abdelbaky, hanaa [1], El-baz, Farouk [2], El-Baroty, gamal [3].

Production of carotenoids from marine microalgae and its evaluation as safe food colorant and lowering cholesterol agents.

Dunaliella salina, a green marine algae, accumulated high amounts of carotenoids (12.6%, d.w), including β-carotene (60.4%, of total carotenoids), astaxanthine (17.7%), zeananthin (13.4%), lutein (4.6%) and cryptoxanthin (3.9%), when cultivated under salted stress condition combined with low nitrogen level. The algal carotenoids was evaluated as a natural food colorant using male albino rats. Four groups of male rats were fed on standard diet (SD), diets containing 0.5 and 1.0 g /Kg of Dunaliella carotenoids and trans β-carotene for 6 weeks. The tested diets did not induce any obvious injurious effect or morality of the animals. The values on absolute and relative weights of vital organs, body weight gains, food intake, food efficiency and protein efficiency ratio did not reveal any significant differences among all tested rat groups. The levels of glucose in plasma and hepatic glycogen were not significantly changed compared with the rat control group. Also, the enzyme activities of plasma aspartate (AST) and alanine aminotransferase (ALT), alkaline phosphatase (ALP), and levels of total proteins, urea and creatinine did not show any significant differences compared with rat control group. Whilst, rats fed on carotenoid supplemented diets possessed significant lower levels in plasma and hepatic total lipids, triglycerides, total cholesterol and phosophlipids.
Overall consumption of carotenoids, as a natural colorant from Dunaliella salina did not result in adverse effects in experimental animals, but might possess hypolipidemic and hypocholesterolemic properties. Therefore, Dunaliella salina algae can be further extended to exploit its possible application for various health benefits as nutraceuticals and food additives.


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1 - National Research Centre, Cairo, Egypt, Plant Biochemistry, Giza, Cairo, Egypt
2 - Plant Biochemistry, National Research Centre, Cairo, Egypt, Giza, Cairo, Egypt
3 - Fac. Agric. Cairo univ., Biochemistry, Giza, Cairo, Egypt

Keywords:
natural food additives
Dunaliella
salina.

Presentation Type: Oral Paper:Papers for Topics
Session: CP47
Location: Williford C/Hilton
Date: Wednesday, July 11th, 2007
Time: 9:30 AM
Number: CP47004
Abstract ID:1139


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