Optical and thermal properties of edible coatings for application in solar drying

Abstract Solar drying is a sustainable process that may impact the quality of dried food. This is because, pigments contained in food are sensitive to sunlight, and exposure to ultraviolet radiation can affect them. We applied biopolymer-based coatings on strawberry, from hydro-colloidal solutions o...

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Autores principales:	A. López-Ortiz, I. Y. Pacheco Pineda, L. L. Méndez-Lagunas, A. Balbuena Ortega, Laura Guerrero Martínez, J. P. Pérez-Orozco, J. A. del Río, P. K. Nair
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6556326f53f8429a9b1691067f1f5a5b
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spelling	oai:doaj.org-article:6556326f53f8429a9b1691067f1f5a5b2021-12-02T17:16:00ZOptical and thermal properties of edible coatings for application in solar drying10.1038/s41598-021-88901-52045-2322https://doaj.org/article/6556326f53f8429a9b1691067f1f5a5b2021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-88901-5https://doaj.org/toc/2045-2322Abstract Solar drying is a sustainable process that may impact the quality of dried food. This is because, pigments contained in food are sensitive to sunlight, and exposure to ultraviolet radiation can affect them. We applied biopolymer-based coatings on strawberry, from hydro-colloidal solutions of Opuntia ficus indica-mucilage, fenugreek, xanthan gum, gum Arabic, and guar gum to evaluate their potential use as UV filters for solar drying of food. Thermal properties and the optical transmittance, absorbance and reflectance of the coatings were measured to assess their influence on food-sunlight interaction. During the drying experiments, the moisture content, total anthocyanins (TA), and total phenolic compounds (TPC) were measured. Optical and thermal properties are influenced by the biopolymer-based coatings. Also, the optical properties are influenced by the coating thickness. The differences in optical and thermal properties influence the drying process. Differences exist in the drying rate for strawberry slices with coating, compared with those without the coatings. In general, the TA and TPC content in the product are better preserved under solar drying than in control experiments done in a drying oven. A partial transmittance of solar UV radiation is recommended to obtain increased TA and TPC contents in the dried product.A. López-OrtizI. Y. Pacheco PinedaL. L. Méndez-LagunasA. Balbuena OrtegaLaura Guerrero MartínezJ. P. Pérez-OrozcoJ. A. del RíoP. K. NairNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-16 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q A. López-Ortiz I. Y. Pacheco Pineda L. L. Méndez-Lagunas A. Balbuena Ortega Laura Guerrero Martínez J. P. Pérez-Orozco J. A. del Río P. K. Nair Optical and thermal properties of edible coatings for application in solar drying
description	Abstract Solar drying is a sustainable process that may impact the quality of dried food. This is because, pigments contained in food are sensitive to sunlight, and exposure to ultraviolet radiation can affect them. We applied biopolymer-based coatings on strawberry, from hydro-colloidal solutions of Opuntia ficus indica-mucilage, fenugreek, xanthan gum, gum Arabic, and guar gum to evaluate their potential use as UV filters for solar drying of food. Thermal properties and the optical transmittance, absorbance and reflectance of the coatings were measured to assess their influence on food-sunlight interaction. During the drying experiments, the moisture content, total anthocyanins (TA), and total phenolic compounds (TPC) were measured. Optical and thermal properties are influenced by the biopolymer-based coatings. Also, the optical properties are influenced by the coating thickness. The differences in optical and thermal properties influence the drying process. Differences exist in the drying rate for strawberry slices with coating, compared with those without the coatings. In general, the TA and TPC content in the product are better preserved under solar drying than in control experiments done in a drying oven. A partial transmittance of solar UV radiation is recommended to obtain increased TA and TPC contents in the dried product.
format	article
author	A. López-Ortiz I. Y. Pacheco Pineda L. L. Méndez-Lagunas A. Balbuena Ortega Laura Guerrero Martínez J. P. Pérez-Orozco J. A. del Río P. K. Nair
author_facet	A. López-Ortiz I. Y. Pacheco Pineda L. L. Méndez-Lagunas A. Balbuena Ortega Laura Guerrero Martínez J. P. Pérez-Orozco J. A. del Río P. K. Nair
author_sort	A. López-Ortiz
title	Optical and thermal properties of edible coatings for application in solar drying
title_short	Optical and thermal properties of edible coatings for application in solar drying
title_full	Optical and thermal properties of edible coatings for application in solar drying
title_fullStr	Optical and thermal properties of edible coatings for application in solar drying
title_full_unstemmed	Optical and thermal properties of edible coatings for application in solar drying
title_sort	optical and thermal properties of edible coatings for application in solar drying
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/6556326f53f8429a9b1691067f1f5a5b
work_keys_str_mv	AT alopezortiz opticalandthermalpropertiesofediblecoatingsforapplicationinsolardrying AT iypachecopineda opticalandthermalpropertiesofediblecoatingsforapplicationinsolardrying AT llmendezlagunas opticalandthermalpropertiesofediblecoatingsforapplicationinsolardrying AT abalbuenaortega opticalandthermalpropertiesofediblecoatingsforapplicationinsolardrying AT lauraguerreromartinez opticalandthermalpropertiesofediblecoatingsforapplicationinsolardrying AT jpperezorozco opticalandthermalpropertiesofediblecoatingsforapplicationinsolardrying AT jadelrio opticalandthermalpropertiesofediblecoatingsforapplicationinsolardrying AT pknair opticalandthermalpropertiesofediblecoatingsforapplicationinsolardrying
_version_	1718381203423232000

Optical and thermal properties of edible coatings for application in solar drying

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