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Microencapsulation of Banana Passion Fruit (<i>Passiflora tripartita Var. Mollissima</i>): A New Alternative as a Natural Additive as Antioxidant

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Food and Nutrition Sciences 2014年第8期5卷 671-682页

作者： Maritza Gil Ana Restrepo Leonidas Millán luz alzate Benjamín Rojano Chemestry Ecole National University of Colombia Medellin Colombia Engineering Faculty Lasalian University Corporation Caldas Colombia

Banana passion fruit (P. tripartita var. Mollissima) is one of the most promising tropical fruits giving its antioxidant activity (AOA) to replace synthetic additives. Despite this property, there are no studies about the metabolites responsible for its biological function or proposals for the application of technologies, such as microencapsulation by spray drying, to improve its properties and ease its incorporation in several food matrices. The aim of this study is to microencapsulate the pulp of banana passion fruit with several mixtures of encapsulants and identify which one of these mixtures is better to preserve its AOA. The antioxidant activity values for the banana passion fruit pulp were as follows: DPPH: 6630.2 ± 91 μMtrolox/100g;ABTS: 18764.3 ± 270.4 μMtrolox/100g;FRAP: 1703.6± 938.2 mgAA/100g, ORAC: 8105.4 ± 424.2 μmol TEAC/100g of sample;Total phenols: 8862.2 ± 451.4 gallic ac. mg/100g. The concentrations of the bioactive compounds expressed in mg of gallic acid per 100 g of the pulp on a dry base were 13.9 ± 0.004;5.9 ± 0.001 and 126.3 ± 0.004 for caffeic, p-coumaric and ferulic acids, respectively. The best shelf-life followed by ABTS in eight assays was between 28.8 and 31.5 weeks using maltodextrin and modified starch, MD:MS (1/4:3/4) and MD:MS (0:1), respectively. In conclusion, ABTS is the best method to measure the AOA in banana passion fruit because it correlated with the phenolic compounds better than DPPH and FRAP methods. Additionally, two options were found to protect the AOA and to extent the shelf-life of the passion fruit by spray-drying, with mixtures of encapsulants widely used in the food industry.

关键词： Passiflora tripartite ABTS Maltodextrin Microencapsulation Phenolic Compound

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A Special Case on the Stability and Accuracy for the 1D Heat Equation Using 3-Level and <i>θ</i>-Schemes

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Applied Mathematics 2015年第3期6卷 476-483页

作者： Pedro Pablo Cárdenas alzate José Gerardo Cardona luz María Rojas Department of Mathematics Universidad Tecnol&oacute gica de Pereira Pereira Colombia Fundació n Universitaria del Area Andina Pereira Colombia

We establish the conditions for the compute of the stability restriction and local accuracy on the time step and we prove the consistency and local truncation error by using θ-scheme and 3-level scheme for Heat Equat... 详细信息

关键词： Global Truncation Local Accuracy Stability Restriction

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