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Evaluation of ascorbic acid content in different varieties of frozen of cherry fruit
Сherry is the most common pit crop in our country. It is zoned in all soil-climatic zones of Ukraine and is a valuable fast-growing fruit breed that gives the fruit essential for human nutrition. It has high flavor qualities, contains 0.70–3.00 % valuable organic acids, 6.5–21.5 % sugar, vitamins, including 13-19 mg/100 g. of vitamin C. The latter plays an important role in human nutrition, since it is essential for normal metabolism.
Human body provision with vitamin C (ascorbic acid) is of special concern as 50–80 % of the population manifests its lack, which has a negative effect on human health.
Ascorbic acid content in fruit depends on the variety, ripeness degree, soil and climatic conditions of cultivation, harvesting time as well as transportation and storage conditions. Cherry fruit contain within 10−50 mg/100 g of vitamin C.
However, the shelf life of cherries is only a few days. Therefore, the annual provision of the population with these fruits is only possible under organization of fresh long-term and canned storage.
Freezing is one of the most advanced methods of preservation as it promotes better preservation in the fruit nutritional value, including labile vitamin C, than any other method of processing. Studies have found out that the cherriy fruit lose a significant amount of ascorbic acid during the freezing and in the storage period.
The aim of the research was to study the dependence of the characteristics variety and the method of freezing cherry fruit on the change of ascorbic acid content.
The fruit of the following cherry varieties were selected for the research in 2016−2018: Zhadana, Chance, Elegant, Optimist, Podbielska, Alpha, Memory of Artemenko grown at the pomology experimental station named after L.P. Symiyenko of IH NAAS.
Cherry fruits harvested in the consumer stage of ripeness were sorted, examined, washed, frozen in pre-prepared sugar syrups in plastic cups at a temperature of −22–24 °С, kept at a temperature of −18 °С for up to 6 months.
The following variants of fruit freezing were studied: in bulk (control), in 25 % sugar syrup, in 20 % sugar syrup with 4 % ascorutin, in 45 % sugar syrup.
Before and after freezing, ascorbic acid content was determined in the fruit for three to six months.
Studies on the freezing of cherry fruit were conducted in accordance with the guidelines for conducting research on frozen fruits, berries and vegetables. The chemical composition of the frozen fruit was investigated taking into account the mass losses.
According to the research results, the content of ascorbic acid in fresh cherry fruits ranged from 16.25 to 19.15 mg/100 g. The highest content was noted in the cherry varieties of Memory of Artemenko (19.15 mg/100 g), and the lowest – in Optimist (16.25 mg/100 g).
In six months following the freezing, compared with fresh fruits, there was a decrease in ascorbic acid by 7–8.85 mg/100 g which made 38.2–51.4 % compared to the fresh fruit. The smallest losses were in the fruits, frozen in 45 % of sugar syrup (35.5–43.2 %) and in 20 % of sugar syrup with 4 % of ascorutin (36.08–44.3 %).
Aascorbic acid content at the end of storage was 48.6–553 % in the control and for fruit cherries, frozen in sugar syrups, it was higher and made 53.2–64.5 %. The highest content of ascorbic acid was retained in cherries frozen in 45 % sugar syrup – 56.9–64.5 % and in cherry fruit frozen in 20 % sugar syrup with 4 % ascorutin added – 55.42–63 %.
Consequently, there was a decrease in ascorbic acid content by 38.2–51.4 % in the fruits of cherry during the freezing. Somewhat lower was the loss of its content in fruit frozen in sugar syrups, in particular in 45 % of sugar syrup – 35.5–43.2 % and in 20 % of sugar syrup with 4 % of ascorutin – 36.8–44.3 %. In general, the content of ascorbic acid for fruit cherries, frozen in sugar syrups, remained at 53.2–64.5 %.
The best preservation of its content in frozen cherry fruits was found in 45 % sugar syrup and 20 % sugar syrup with addition of 4 % ascorutin.
Key words: cherry fruit, ascorbic acid, sugar syrup, freezing.
Reference:
1. Vojtok, T.І. (2016). Dobіr perspektivnih sortіv vishnі (Cerasus vulgaris mill.), pridatnih dlja shvidkogo zamorozhuvannja [Selection of promising varieties of cherries (Cerasus vulgaris mill.), Suitable for rapid freezing]. Sadіvnictvo [Gardening], Issue 71, pp. 118−122.
2. Shkinder-Barmina, A.N. (2013). Sortovye osobennosti razvitija vishni (Cerasus vulgaris Mill.) na juge Ukrainy [Varietal varieties of cherry (Cerasus vulgaris Mill.) In the south of Ukraine]. Sovremennoe sadovodstvo [Modern gardening], no. 3, pp. 1–7.
3. Bublyk, M.O. (2002). Zonal'ne rajonuvannja vishnі і slivi v Ukrai`nі [Zonal zoning of cherries and plums in Ukraine]. Sad, vinograd і vino Ukrai`ni [Garden, Grape and Wine of Ukraine], no. 9, pp. 20−24.
4. Stan, A., Popa, M.E. (2015). Pretreatment and freezing storage effect on antioxidant capacity of sour cherries and correlation with color changes. Romanian Biotechnological Letters. Vol. 20(5), pp. 10726−10834.
5. Vasylyshyna, O. Inflaence of freezing and storing cherry fruit on its nutritional value. Acta scientiarum polonorum technologia alimentaria. 2016, 15(2), pp. 145−150. Avialable at: DOI: 10.17306/J.AFS.2016.2.14.
6. Kolesnikovа, A.F. (2003). Vishnja i chereshnja [Cherry and sweet cherry]. Moscow, Folio, 256 p.
7. Shul'ga, O.K., Petuhova, T.A., Moіsejeva, G.M., Rizhih, A.S. (2018). Marker zagal'nogo stanu zdorovja ljudini – vіtamіn «S» [The marker of the general state of human health - vitamin "C"]. Molodij vchenij [Young scientist], no. 2 (54), pp. 56−62.
8. Vasilenko, V.І. (2012). Bіohіmіchna ocіnka plodіv novih sortіv vishnі (Cerasus vulgaris mill.) [Biochemical evaluation of new cherry varieties (Cerasus vulgaris mill.)]. Sadіvnictvo [Gardening], Issue 67, pp. 200−208.
9. Іvanova, І.Je. (2005). Ocіnka sortіv chereshnі ukrai’ns'koi’ selekcіi’ na pridatnіst' do zamorozhuvannja, zberіgannja ta nastupnoi’ pererobki: avtoreferat diertacіi’ [Evaluation of sorts of Ukrainian cranberries for suitability for freezing, preservation and subsequent processing: author's abstract. Dis.]. Kyiv. 34 p.
10. Poll, L., Petersen, M., Nielsen, G.S. (2003). Influence of harvest year and harvest time on soluble solids, titrateable acid, anthocyanin content and aroma components in sour cherry (Prunus cerasus L. cv. "Stevnsbær"). European Food Research and Technology. 216(3), pp. 212–216.
11. Shevchenko, S.M., Sorokopudov, V.N., Naval'neva, I.A. (2011). Dinamika askorbinovoj kisloty v plodah rastenij roda Cerasus tomentosa (thumb.) wall [Dynamics of ascorbic acid in the fruits of plants of the genus Cerasus tomentosa (thumb.) Wall]. Himija rastitel'nogo syr'ja [Chemistry of plant materials], no. 2, pp. 185–186.
12. Іvanchenko, V.J., Іvanova, І.Je. (2009). Vibіr krashhogo dlja zamorozhuvannja ta trivalogo zberіgannja sortu djukіv z optimal'nim kompleksom parametrіv organoleptichnih ta fіziko-hіmіchnih pokaznikіv plodіv [Choosing the best for freezing and long-term storage of varieties of dews with the optimal set of parameters of organoleptic and physico-chemical parameters of fruits]. Vinogradarstvo i vinodelie [Viticulture and winemaking], no. 39, pp. 49−52.
13. Sіmahіna, G.O., Naumenko, N.V. (2011). Niz'kі temperaturi u tehnologіjah ozdorovchih produktіv [Low temperatures in health-improving products]. Kyiv, Stal', 363 p.
14. Lakatos, L., Szabo, T., Sun, Z, Soltész M., Szabо, Z., Dussi, M.C., Nyeki, J. (2010). The role of meteorological variables of blossoming and ripening within the tendency of qualitative indexes of sour cherry. International Journal of Horticultural Science. 16 (1), pp. 7–10.
15. Derjabina, S.S. (2003). Razrabotka tehnologii zamorazhivanija kostochkovyh plodov v zhidkih hladonositeljah: dis. … kand. tehn. nauk [Development of technology for freezing stone fruit in liquid coolants: dis. ... Cand. tech. of science]. St. Petersburg, 137 p.
16. Poiana, M.A., Diana, M., Alexa, E. (2010). Influence of home-scale freezing and storage on antioxidant properties and color quality of different garden fruits. Bulgarian Journal of Agricultural Science. Vol. 16(2), pp. 163−171.
17. Golub, O.V., Poznjakovskij, V.M., Zharkov, A.S. (2009). Vlijanie zamorozki na kachestvennye pokazateli jagod vishni [The effect of freezing on the quality indicators of cherry berries]. Pishhevaja promyshlennost' [Food industry], no. 7, pp. 32−33.
18. Sazonova, I.D. (2018). Jagodnye kul'tury kak syr'e dlja tehnicheskoj pererabotki [Berry crops as raw materials for technical processing]. Nauchnye trudy Severo Kavkazskogo federal'nogo nauchnogo centra sadovodstva, vinogradarstva, vinodelija [Scientific works of the North Caucasus Federal Scientific Center for Horticulture, Viticulture, and Winemaking], Vol. 20, pp. 125−134.
19. Najchenko, V. M. (2001). Praktikum z tegnologіi’ zberіґannja і pererobki plodіv ta ovochіv [Workshop on the preservation and processing of fruits and vegetables]. Kyiv, FADA LTD, 211 p.
20. Dzheneeva, Je.L., Anisimova, V.Ja., Іvanova, S.V. (1989). Metodicheskie ukazanija po provedeniju issledovanij s bystrozamorozhennymi plodami, jagodami i ovoshhami [Guidelines for conducting research with quick-frozen fruits, vegetables and vegetables]. Moscow, 32 p.
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