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Effect of Liquefaction of Honey on the Content of Phenolic Compounds

Thermal liquefaction at low temperature is very time consuming and microwaves or an ultrasonic bath can be used to accelerate the process of dissolving sugar crystals. Phenolic compounds, such as phenolic acids or flavonoids, are an important group of secondary metabolites of plants and become honey...

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Autor principal: Hájek, Tomáš
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9861181/
https://www.ncbi.nlm.nih.gov/pubmed/36677771
http://dx.doi.org/10.3390/molecules28020714
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author Hájek, Tomáš
author_facet Hájek, Tomáš
author_sort Hájek, Tomáš
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description Thermal liquefaction at low temperature is very time consuming and microwaves or an ultrasonic bath can be used to accelerate the process of dissolving sugar crystals. Phenolic compounds, such as phenolic acids or flavonoids, are an important group of secondary metabolites of plants and become honey from the nectar of blossoms. In this study, how the content of phenolic acids and flavones in honey were affected by liquefaction of honey using a microwave oven was studied. The concentration of tested compounds in untreated honey and in honey liquefied in a hot water bath, ultrasonic bath and microwave oven at four microwave power levels were determined by reversed phase liquid chromatography combined with multichannel electrochemical detection. A significant decrease in the content of all compounds was observed for all melting treatments. The phenolic compounds concentration decreased on average by 31.1–35.5% using microwave at intensities 270, 450 and 900 W and the time required for the sugar crystal melting was more than 20 times less than in the case of the 80 °C water bath. The temperature of samples after the end of microwave liquefaction was 76–89 °C. Significantly higher losses of phenolic compounds were observed during ultrasound treatment (48.5%), although the maximum temperature of honey was 45 °C, and at the lowest microwaves power (50.6%).
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spelling pubmed-98611812023-01-22 Effect of Liquefaction of Honey on the Content of Phenolic Compounds Hájek, Tomáš Molecules Article Thermal liquefaction at low temperature is very time consuming and microwaves or an ultrasonic bath can be used to accelerate the process of dissolving sugar crystals. Phenolic compounds, such as phenolic acids or flavonoids, are an important group of secondary metabolites of plants and become honey from the nectar of blossoms. In this study, how the content of phenolic acids and flavones in honey were affected by liquefaction of honey using a microwave oven was studied. The concentration of tested compounds in untreated honey and in honey liquefied in a hot water bath, ultrasonic bath and microwave oven at four microwave power levels were determined by reversed phase liquid chromatography combined with multichannel electrochemical detection. A significant decrease in the content of all compounds was observed for all melting treatments. The phenolic compounds concentration decreased on average by 31.1–35.5% using microwave at intensities 270, 450 and 900 W and the time required for the sugar crystal melting was more than 20 times less than in the case of the 80 °C water bath. The temperature of samples after the end of microwave liquefaction was 76–89 °C. Significantly higher losses of phenolic compounds were observed during ultrasound treatment (48.5%), although the maximum temperature of honey was 45 °C, and at the lowest microwaves power (50.6%). MDPI 2023-01-11 /pmc/articles/PMC9861181/ /pubmed/36677771 http://dx.doi.org/10.3390/molecules28020714 Text en © 2023 by the author. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Hájek, Tomáš
Effect of Liquefaction of Honey on the Content of Phenolic Compounds
title Effect of Liquefaction of Honey on the Content of Phenolic Compounds
title_full Effect of Liquefaction of Honey on the Content of Phenolic Compounds
title_fullStr Effect of Liquefaction of Honey on the Content of Phenolic Compounds
title_full_unstemmed Effect of Liquefaction of Honey on the Content of Phenolic Compounds
title_short Effect of Liquefaction of Honey on the Content of Phenolic Compounds
title_sort effect of liquefaction of honey on the content of phenolic compounds
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9861181/
https://www.ncbi.nlm.nih.gov/pubmed/36677771
http://dx.doi.org/10.3390/molecules28020714
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