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JELLY FOOD CONCENTRATE WITH ENCAPSULATED HIBISCUS EXTRACT

Автор: sveta on . Posted in 2021_04(40)

Cite as APA style citation
Grabovs'ka O., Vitrjak O., Avramenko A. Koncentrat kyselju z inkapsul'ovanym ekstraktom gibiskusu. Mizhnarodnyj naukovo-praktychnyj zhurnal "Tovary i rynky". 2021. № 4. P. 122-132.

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UDC 664.682.9   DOI: https://doi.org/10.31617/tr.knute.2021(40)12
     
Olena HRABOVSKA
 
 
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ORCID: 0000-0001-6462-3790
  Doctor of Technical Sciences, Professor, Professor
at the Department of Technologies and Organization of Restaurant Business,
Kyiv National University of Trade and Economics

19, Kyoto str., Kyiv, 02156, Ukraine
     
Oksana VITRIAK
 
 
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ORCID:0000-0002-6614-1928
  Candidate of Technical Sciences, Associate Professor, Associate Professor
at the Department of Technologies and Organization of Restaurant Business,
Kyiv National University of Trade and Economics

19, Kyoto str., Kyiv, 02156, Ukraine
     
Alina AVRAMENKO

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ORCID: 000-0002-8546-8950
  postgraduate student
at the National University of Food Technologies

68, Volodymyrska str., Kyiv, 02033, Ukraine

JELLY FOOD CONCENTRATE WITH ENCAPSULATED HIBISCUS EXTRACT

BackgroundTaking into consideration the intense rhythm of life, the development of technologies for instant food products of increased nutritional value is urgent. Typically, food concentrates for desserts include fruit or fruit and berry fillings and require cooking to prepare ready-made meals. In this case, heat treatment of the mixture (boiling) negatively affects the thermolabile biologically active compounds.
The aim of the work was to develop a recipe for instant food jelly concentrates of increased nutritional value based on encapsulated powdery hibiscus extract.
Materials and methods. To encapsulate the aqueous-alcoholic extract of hibiscus and obtain a powdered semi-finished product, swelling potato starch was used. Rheological studies were carried out using a "REOTEST-2" rotational viscometer.
Results. In order to enrich food concentrates of instant kissel with biologically active substances, we studied a method for extracting dry hibiscus flowers with aqueous-alcoholic solutions of various concentrations. It was found that the extractivity and the transfer of polyphenolic compounds, including anthocyanins, to the extract are improved when a water-alcohol mixture with an ethyl alcohol concentration of 30 % is used as an extractant.
For the preparation of a powdery hibiscus extract, modified swelling starch was used, which has the property of swelling in cold water, which makes it possible not to subject the mixture to prolonged heat treatment for preparing a ready-made dish and to preserve the biologically active substances of the hibiscus extract. In addition, this starch is an effective solid carrier that plays a protective role for thermolabile vitamins and bioflavonoids. On the basis of experimental studies, formulations of instant jelly have been developed, which include fructose, powdered hibiscus extract, apple pectin and ascorbic acid.
The study of the rheological properties of semi-finished products based on hibiscus extract, as well as ready-made jelly, testifies to the receipt of a finished dessert with a delicate creamy consistency.
Conclusion.  A method for obtaining a powdery encapsulated hibiscus extract based on swelling potato starch and a composition of a food jelly concentrate using this semi-finished product have been developed.
It was found that for the extraction of raw materials it is better to use a water-alcohol mixture with an ethanol content of 30 %, since most of the anthocyanins are converted into the extract under these conditions.
The developed semi-finished product of dry hibiscus extract can be used as a thickener, acidifier and colorant in recipes for food concentrates for instant dessert dishes. Due to the use of swelling starch, food concentrates of jelly do not need to be boiled, and the presence of vitamins, organic acids, flavonoids and especially anthocyanins in the hibiscus extract increases the nutritional value of the finished product.
Keywordsfood concentrates, swellable starch, hibiscus extract, encapsulation, jelly, rheological properties.

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