Dependence of surface tension of fruit puree on temperature exposure

When developing food products with new properties using innovative technologies, it is important to obtain data on the physicochemical, thermal-physical and structural-mechanical properties of the processed food media. So, one of the key components in the selection of the mode of collapsing ultrasonic cavitation is the surface tension of vegetable purees. The paper presents research data (2020) on the effect of temperature on the surface tension coefficient of fruit puree of different viscosity. The objects of research are cherry plum, pear and apple puree, combined in a row by viscosity. The surface tension coefficient was determined by the stalagmometric method, for which the puree was preliminarily centrifuged. The measurements were carried out at temperatures of 25 and 35 °С. It was found that, under equal conditions of centrifugation of puree, the proportion of supernatant in pear puree is noticeably higher – 77.37 % to the weight of puree in comparison with cherry plum puree (67.20 %) and apple puree (52.75 %). This fact can be explained by the presence of stony cells in the former which form an incompressible sediment, which allows a greater separation of the dispersed phase (sediment) and the dispersion medium (supernatant). It was found that the coefficient of surface tension of fruit purees, despite the slight difference, decreases with increasing temperature. Analysis of the steepness of the slope of the curve characterizing the effect of temperature on the surface tension coefficient showed that temperature stabilization during technological processing is more required for pear puree.

1. Petrov A. N., Shishkina N. S., Patsyuk L. K., Alabina N. M., Borchenkova L. A., Glazkov S. V. Poluchenie novykh vidov produktov s primenenie kavitatsionnoy obrabotki. [Obtaining of new products using cavitation processing]. Kholodil'naya tekhnika. 2017;(8):54-59. (In Russ.). URL: http://www.holodteh.ru/wp-content/uploads/xt_08_17.pdf

2. Patsyuk L. K., Fedosenko T. V., Kondratenko V. V. Izuchenie avtonomnogo protsessa inversii sakharozy za schet termicheskogo vozdeystviya pri ul'trazvukovoy obrabotke ovoshchnykh i fruktovykh pyure. [Study of the autonomous process of inversion of sugarose through thermal influence at ultrasonic processing of vegetable and fruit pures]. Ovoshchi Rossii = Vegetable crops of Russia. 2020;(5):93-96. (In Russ.). DOI: https://doi.org/10.18619/2072-9146-2020-5-93-96

3. Dukhu T. A., Shcherbakova N. A., Ostapenkova N. A., Savenkova T. V., Aksenova L. M. Novye fizicheskie sposoby obrabotki konditerskikh mass. [New physical methods of processing confectionery masses]. Printsipy pishchevoy kombinatoriki – osnova modelirovaniya polikomponentnykh pishchevykh produktov: sb. mat-lov Vseros. nauchn. praktich. konf. [Principles of food combinatorics - the basis for modeling polycomponent food products: collection of articles of the All-Russian scientific and practical conf.]. Uglich: VNIIKP, 2010. pp. 85-87.

4. Savenkova T. V., Karimov A. R., Taleysnik M. A., Gerasimov T. V., Kondratev N. B. Mechanisms of destruction and synthesis of liquid media, used in the food industry under non-equilibrium conditions. Food systems. 2019;2(4):38-41. DOI: https://doi.org/10.21323/2618-9771-2019-2-4-38-41

5. Khmelev V. N., Shalunov A. V., Golykh R. N., Shalunova A. V. Vyyavlenie optimal'nykh rezhimov i usloviy ul'trazvukovogo vozdeystviya dlya raspyleniya vyazkikh zhidkostey. [Optimal modes and conditions of ultrasonic effect for atomization of viscous liquids]. Elektronnyy zhurnal «Tekhnicheskaya akustika» = Electronic Journal Technical Acoustics. 2011;10. (In Russ.). URL: http://www.ejta.org/en/khmelev9

6. Burykin A. I. Poverkhnostnoe natyazhenie molochnykh produktov. [Surface tension of milk products]. Molochnaya promyshlennost' = Dairy Industry. 2012;(5):22-23. (In Russ.). URL: https://elibrary.ru/item.asp?id=17675078

7. Magerramov M. A. Teplofizicheskie svoystva natural'nogo granatovogo soka. [Thermophysical properties of natural pomegranate juice]. Khranenie i pererabotka sel'khozsyr'ya. 2005;(4):27. (In Russ.).

8. Magerramov M. A. Temperaturoprovodnost' i poverkhnostnoe natyazhenie granatovogo soka pri temperaturakh 10-90 °S. [Thermal diffusivity and surface tension of pomegranate juice at temperatures of 10-90 °C]. Izvestiya vysshikh uchebnykh zavedeniy. Pishchevaya tekhnologiya = Food Technology. 2006;(5(294)):68-71. (In Russ.). URL: https://www.elibrary.ru/item.asp?id=12857537

9. Sorokopud V. V., Plotnikov I. B., Plotnikova L. V. Teplofizicheskie kharakteristiki vodnykh i vodnospirtovykh ekstraktov yagod klyukvy i golubiki. [Thermal and physical characteristics of aqueous and aqueousalcoholic extracts of cowberry and blueberry]. Khimiya rastitel'nogo syr'ya = Chemistry of plant raw material. 2014;(3):255-258. (In Russ.). URL: https://www.elibrary.ru/item.asp?id=22884310

10. Sumenkov M. V., Sorokopud A. F. Fiziko-khimicheskie svoystva ekstraktov yagod klyukvy. [Physicochemical properties of cranberry extract]. Nauchnyy zhurnal NIU ITMO. Seriya «Protsessy i apparaty pishchevykh proizvodstv» = Scientific journal NRU ITMO. Series "Processes and Food Production Equipment". 2016;(1):118-125. (In Russ.). DOI: https://doi.org/10.17586/2310-1164-2016-9-1-118-125

11. Burda V. E., Panov D. A. Izmenenie khimicheskogo sostava likera v protsesse stupenchatogo prigotovleniya. [The chemical composition of liqueur change in the process of step preparation]. Uchenye zapiski Tavricheskogo natsional'nogo universiteta imeni V. I. Vernadskogo. Seriya: Biologiya, khimiya = Scientific Notes of Taurida V. Vernadsky National University. Series: Biology, chemistry. 2012;25(64)(2):219-223. (In Ukraine). URL: https://elibrary.ru/item.asp?id=25135645

12. Burda V. E., Panov D. A. Izmenenie fiziko-khimicheskikh svoystv vinogradnykh susel pri poetapnom prigotovlenii rezervuarnykh likerov. [The Changes in the physic-chemical properties of grape musts by a phased reservoir liquor preparation]. Uchenye zapiski Tavricheskogo natsional'nogo universiteta imeni V. I. Vernadskogo. Seriya: Biologiya, khimiya = Scientific Notes of Taurida V. Vernadsky National University. Series: Biology, chemistry. 2013;26(65)(2):206-210. (In Ukraine). URL: https://elibrary.ru/item.asp?id=25005399

13. Asadov A. Sh. Izuchenie vliyaniya temperatury na poverkhnostnoe natyazhenie vodnykh rastvorov poverkhnostno aktivnykh veshchestv (PAV). [Searching of the influence of temperature on surface tension of water solutions of surface-active substances (SAW)]. Aktual'nye problemy gumanitarnykh i estestvennykh nauk. 2018;(7):22-24. (In Russ.). URL: https://elibrary.ru/item.asp?id=35199466

14. Grigor'ev B. V., Vazhin D. A., Kuzina O. A. Vliyanie kontsentratsii PAV vodnykh rastvorov i temperatury na koeffitsient poverkhnostnogo natyazheniya. [The effect of SAS concentration in the water solution and temperature on the surface tension]. Vestnik Tyumenskogo gosudarstvennogo universiteta. Fiziko-matematicheskoe modelirovanie. Neft', gaz, energetika = Tyumen State University Herald. Physical and Mathematical Modeling. Oil, Gas, Energy. 2016;2(3):35-48. (In Russ.). URL: https://elibrary.ru/item.asp?id=28351950

15. Mordasov M. M., Savenkov A. P., Chechetov K. E. Metodika issledovaniya vzaimodeystviya strui gaza s poverkhnost'yu zhidkosti. [Method for analyzing the gas jet impinging on a liquid surface]. Zhurnal tekhnicheskoy fiziki = Technical Physics. 2016;86(5):20-29. (In Russ.). URL: https://elibrary.ru/item.asp?id=27368395

16. Muratova E. I., Smolikhina P. M. Reologiya konditerskikh mass. [Rheology of confectionery masses]. Tambov: FGBOU VPO «TGTU», 2013. 188 p.

17. Karbowiak T., Debeaufort F., Voilley A. Importance of Surface Tension Characterization for Food, Pharmaceutical and Packaging Products: A Review. Critical Reviews in Food Science and Nutrition. 2006;46(5):391-407. DOI: https://doi.org/10.1080/10408390591000884

18. Tabatorovich A. N., Reznichenko I. Yu. Osobennosti khimicheskogo sostava yablochnogo pyure kak osnova identifikatsii. [Peculiarities of chemical composition of apple puree as the basis for identification]. Tekhnika i tekhnologiya pishchevykh proizvodstv = Food Processing: Techniques and Technology. 2015;(3(38)):153-159. (In Russ.). URL: https://elibrary.ru/item.asp?id=24249176

19. Kvaratskheliya V. N., Rodionova L. Ya. Izmenenie analiticheskikh kharakteristik pektinovykh veshchestv yablok zimnego sroka sozrevaniya pri dlitel'nom vliyanii nizkikh temperatur. [Changing the analytical characteristics of pectin substances apples winter ripening under long influence of low temperatures]. Politematicheskiy setevoy elektronnyy nauchnyy zhurnal Kubanskogo gosudarstvennogo agrarnogo universiteta = Polythematic online scientific journal of Kuban State Agrarian University. 2014;(100):1193-1203. (In Russ.). URL: https://elibrary.ru/item.asp?id=21799479

20. Smelik T. L., Mozhar N. V., Avdeeva Yu. V. Khimicheskiy sostav plodov grushi, proizrastayushchey na Yuge Krasnodarskogo kraya. [The chemical composition of pear fruits, growing in the south of Krasnodar region]. Plodovodstvo i vinogradarstvo Yuga Rossii = Fruit growing and viticulture of South Russia. 2014;(28(4)):8-17. (In Russ.). URL: https://elibrary.ru/item.asp?id=21732027

21. Sozaeva D. R., Dzhaboeva A. S., Shaova L. G., Tsagoeva O. K. Soderzhanie pektinov v razlichnykh vidakh plodovykh kul'tur i ikh fiziko-khimicheskie svoystva. [The pectin content in different types of fruit crops and their physicochemical characteristics]. Vestnik Voronezhskogo gosudarstvennogo universiteta inzhenernykh tekhnologiy = Proceedings of the Voronezh State University of Engineering Technologies. 2016;(2):170-174. (In Russ.). URL: https://elibrary.ru/item.asp?id=26774425

22. Grebennikova O. A., Polonskaya A. K., Gorina V. M., Ezhov V. N. Biokhimicheskoe obosnovanie perspektivnykh napravleniy ispol'zovaniya plodov alychi. [The biochemical reasons of perspective directions in using the cherry-plum fruits]. Byulleten' Gosudarstvennogo Nikitskogo botanicheskogo sada = Bulletin of the State Nikitsky Botanical Gardens. 2007;(95):69-74. (In Russ.). URL: https://elibrary.ru/item.asp?id=24293749

23. Guggenheim E. A. The Principle of Corresponding States. J. Chem. Phys. 1945;(13):253-261. DOI: https://doi.org/10.1063/1.1724033

24. Mjalli F. S., Vakili-Nezhaada Gh., Shahbaz K., AlNashef I. M. Application of the Eötvos and Guggenheim empirical rules for predicting the density and surface tension of ionic liquids analogues. Thermochimica Acta. 2014;575:40-44. DOI: https://doi.org/10.1016/j.tca.2013.10.017