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" Novel Delivery Systems for Bioactives from Tomato (Solanum lycopersicum L.) Pomace Extracts: "
Corrêa Filho, Luiz Carlos
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Latin Dissertation
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| Language of Document
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English
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| Record Number
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1106562
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| Doc. No
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TLpq2404055703
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| Main Entry
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Corrêa Filho, Luiz Carlos
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| Title & Author
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Novel Delivery Systems for Bioactives from Tomato (Solanum lycopersicum L.) Pomace Extracts:\ Corrêa Filho, Luiz Carlos
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| College
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Universidade de Lisboa (Portugal)
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| Date
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2019
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| student score
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2019
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| Degree
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Ph.D.
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| Page No
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180
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| Abstract
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The production of functional food products rich in natural bioactive compounds, with the intention of taking advantage of their health benefits, is an important target of the food industry to answer the growing interest of consumers for healthy food. Tomato pomace is rich in carotenoids, mainly lycopene, which have been related to important bioactive properties. Within this context, this work was focused on the stabilization of a tomato pomace ethanolic extract using microencapsulation by spray drying with arabic gum and inulin as wall materials, aiming at its incorporation in food matrices. A first insight on carotenoids microencapsulation with Arabic gum was assessed using model carotenoid molecule (β-carotene). Afterwards, the microencapsulation process of tomato pomace extract using inulin and arabic gum as wall materials was successfully optimized, focusing on the evaluation of the effect of drying temperature and the wall material concentration on drying yield, loading capacity and antioxidant activity of encapsulated bioactives. Both wall materials allowed the production of microparticles loaded with tomato pomace carotenoids. The optimized drying conditions were 10% wall material concentration, and drying temperatures of 160 and 200 °C for inulin and arabic gum, respectively. Finally, particles produced under optimized conditions were evaluated for their storage stability and in vitro release of lycopene. Inulin has shown to be the most efficient wall material in maintaining bioactives stability during microcapsules storage after production. In addition, inulin microcapsules demonstrated a higher bioactives protection ability against simulated gastric conditions, either alone or incorporated in a selected food product (liquid yoghurt), enabling a preferential release in simulated intestinal fluid. Overall, it is envisaged a good potential for the microcapsules of tomato pomace extracts to be incorporated in foods systems with diverse chemical and physical properties
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| Subject
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Food science
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