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A novel method for double encapsulation of C-phycocyanin using aqueous two phase systems for extension of shelf life.

Chandralekha, A. and Prashanth, H. S. and Hrishikesh, A. Tavanandi and Raghavarao, K. S. M. S. (2021) A novel method for double encapsulation of C-phycocyanin using aqueous two phase systems for extension of shelf life. Journal of Food Science and Technology, 58. pp. 1750-1763. ISSN 0022-1155

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Spirulina platensis is having high nutritive value due to pigments such as chlorophyll-a, phycobiliproteins (especially phycocyanins) and carotenoids. In our present work, C-phycocyanin (C-PC) was extracted from dry biomass of Spirulina platensis. C-PC being heat sensitive, reiterates the need for additional protection during drying (micro encapsulation). Accordingly, a novel method employing aqueous two phase systems (ATPSs) as carrier materials to achieve double encapsulation was studied for the first time. PEG 4000/Potassium phosphate and PEG 6000/Dextran were used at already standardized tie line length, at different volume ratios (by varying the total phase composition). ATPS at each volume ratio acted as different carrier materials offering varied degree of heat protection during double encapsulation while maltodextrin, being the conventional carrier material, was used for comparison. The best results of spray dried powders using PEG (4% w/w)/Potassium phosphate salt (18%, w/w) and PEG (6%)/Dextran (10%, w/w) phase systems as carrier materials were compared with conventional encapsulation (MDX as a carrier material) and freeze dying as control. PEG/Dextran as a carrier material with volume ratio of 0.25 resulted in the highest retention of blue colour (b*- value), purity (0.43) as well as yield (YEP) of 94.99% w/w of C-PC, which could be stored for 6 months without much reduction from initial powder characteristics. From the overall results, it can be concluded that ATPS can be used as an effective carrier material for double encapsulation of biomolecules such as C-PC with additional benefit of enhancing the purity.

Item Type: Article
Uncontrolled Keywords: Aqueous biphasic system Phycobiliproteins Freeze drying Spray drying Microencapsulation
Subjects: 500 Natural Sciences and Mathematics > 08 Botanical sciences > 01 Botany > 01 Algae
600 Technology > 08 Food technology > 05 Processing and Engineering
Divisions: Food Engineering
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 30 Sep 2020 11:23
Last Modified: 08 Jul 2021 10:57
URI: http://ir.cftri.res.in/id/eprint/14480

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