Abstract

The development of the technology of whipped yeast-free bread made from whole wheat flour is an urgent task of baking. To implement this technology, it is necessary to properly manage the foaming process of whipped yeast-free dough while preserving the highly porous structure of the crumb of whipped dough blanks and thin-walled bread crust during baking. The purpose of the work is to study the quality changes and establish the modes of preparation of churned yeast-free dough, as well as churned dough blanks with their combined microwave-convective heating.
In the work, samples of churned yeast-free dough obtained on a mixing-churning-forming plant and churned test blanks after pre-microwave heating with a finely porous crumb formed were studied. For an objective assessment of the porosity of bread crumb, a method of optical quantitative analysis of the structure of air bubbles has been developed.
It was found that, taking into account the restriction on the maximum size of air bubbles in the crumb, churned yeast-free test blanks with a density of 0.40 ± 0.03 g/cm³ with finely dispersed air bubbles were preliminarily obtained, in order to form a stable highly porous structure, they were previously subjected to microwave heating at a temperature of 65 ± 1°C in the center of the crumb, and then convective heating at at a temperature of 99 ± 1°C in the center of the crumb to form a thin-walled crust of bread. The conducted studies have shown the dependence of changes in the porosity of the crumb, the formation of its structure on the duration of microwave heating of churned dough blanks. The rational duration of pre-microwave heating of churned dough blanks is determined – 70–80 s and final convective heating during bread baking – up to 14 min. The use of combined microwave-convective heating of churned dough blanks reduces the baking process by 26 min.
The presented approach, together with the method of optical evaluation of air bubbles, allows us to develop an algorithm for optimal control of the process of combined baking bread. The accelerated technology of churned yeast-free bread has been developed and is highly promising for widespread implementation in civil and military bakery.

Keywords

Bread, crumb, microwave, baking, porosity, quality

REFERENCES

1. Rudnev SD, Shevchenko TV, Ustinova YuV, Kryuk RV, Ivanov VV, Chistyakov AM. Technology and theory of mechanically activated water in bakery industry. Food Processing: Techniques and Technology. 2021;51(4):768–778. (In Russ.). https://doi.org/10.21603/2074-9414-2021-4-768-778
2. Alekhina NN, Ponomareva EI, Zharkova IM, Grebenshchikov AV. Assessment of functional properties and safety indicators of amaranth flour grain bread. Food Processing: Techniques and Technology. 2021;51(2):323–332. (In Russ.). https://doi.org/10.21603/2074-9414-2021-2-323-332
3. Smertina ES, Fedyanina LN, Lyakh VA. Hepatoprotective effect of breads with extracts of plants growing in the Far East. Foods and Raw Materials. 2020;8(2):232–240. https://doi.org/10.21603/2308-4057-2020-2-232-240
4. Gabdukaeva LZ, Sorokina ES. Modern market of functional bakery products. Bulletin of the Technological University. 2017;20(1):151–154. (In Russ.).
5. Romanchikov SA. Technology of bread using electric kleb-baiking KHPE-IUZ furnace with ultrasound in pulse mode. Food Industry. 2019;(2):44–48. (In Russ.).
6. Garg A, Malafronte L, Windhab EJ. Baking kinetics of laminated dough using convective and microwave heating. Food and Bioproducts Processing. 2019;115:59–67. https://doi.org/10.1016/j.fbp.2019.02.007
7. Magomedov GO, Plotnikova IV, Magomedov MG, Cheshinsky VL. Sanitary-technological events of bread production without yeast. Hygiene and Sanitation. 2019;98(7):777–782. (In Russ.). https://doi.org/10.18821/0016-9900-2019-98-7-777-782
8. Kalla AM, Devaraju R. Microwave energy and its application in food industry: A review. Asian Journal of Dairy and Food Research. 2017;36(1):37–44. https://doi.org/10.18805/ajdfr.v0iOF.7303
9. Kumar C, Karim MA. Microwave-convective drying of food materials: A critical review. Critical Reviews in Food Science and Nutrition. 2017;59(3):379–394. https://doi.org/10.1080/10408398.2017.1373269
10. Chizoba Ekezie F-G, Sun D-W, Zhang H, Cheng J-H. Microwave-assisted food processing technologies for enhancing product quality and process efficiency: A review of recent developments. Trends in Food Science and Technology. 2017;67:58–69. https://doi.org/10.1016/j.tifs.2017.05.014
11. Therdthai N, Tanvarakom T, Ritthiruangdej P, Zhou W. Effect of microwave assisted baking. Journal of Food Quality. 2016;39(4):245–254. https://doi.org/10.1111/jfq.12207
12. Kulishov BA, Novoselov AG, Ivaschenko SYu, Gusarov NE. Application of electrocontact heating in bakery: Review. Polzunovskiy Vestnik. 2019;(1):106–113. (In Russ.).
13. Alexeev GV. Investigation of energy and resource saving opportunities for baking bakery products. Scientific News. 2018;(11):20–25. (In Russ.).
14. Kutlu N, Pandiselvam R, Saka I, Kamiloglu A, Sahni P, Kothakota A. Impact of different microwave treatments on food texture. Journal of Texture Stud. 2021. https://doi.org/10.1111/jtxs.12635
15. Ushakova NF, Kopysova TS, Kasatkin VV, Kudryashova AG. Experience of microwave heating application for food production. Food Industry. 2013;(10):30–32. (In Russ.).
16. Rushchits AA, Shcherbakova EI. Use of microwave heating in food industry and public catering. Bulletin of the South Ural State University. Series: Food and Biotechnology. 2014;2(1):9–15. (In Russ.).
17. Bou-Orm R, Jury V, Boillereaux L, Le-Bail A. Microwave baking of bread; a review on the impact of formulation and process on bread quality. Food Reviews International. 2021. https://doi.org/10.1080/87559129.2021.1931299
18. Wang M, Sun M, Zhang Y, Chen Y, Wu Y, Ouyang J. Effect of microwave irradiation-retrogradation treatment on the digestive and physicochemical properties of starches with different crystallinity. Food Chemistry. 2019;298. https://doi.org/10.1016/j.foodchem.2019.125015
19. Houšová J, Hoke K. Temperature profiles in dough products during microwave heating with susceptors. Czech Journal of Food Sciences. 2018;20(4):151–160. https://doi.org/10.17221/3526-CJFS
20. Bhatt K, Vaidya D, Kaushal M, Gupta A, Soni P, Arya P, et al. Microwaves and radiowaves: In food processing and preservation. International Journal of Current Microbiology and Applied Sciences. 2020;9(9):118–131. https://doi.org/10.20546/ijcmas.2020.909.015
21. Guzik P, Kulawik P, Zając M, Migdał W. Microwave applications in the food industry: an overview of recent developments. Critical Reviews in Food Science and Nutrition. 2021. https://doi.org/10.1080/10408398.2021.1922871
22. Thuengtung S, Ogawa Y. Comparative study of conventional steam cooking and microwave cooking on cooked pigmented rice texture and their phenolic antioxidant. Food Science and Nutrition. 2020;8(2):965–972. https://doi.org/10.1002/fsn3.1377
23. Shapiro L, Stokman D. Computer vision. Moscow: BINOM. Laboratoriya znaniy; 2013. 752 p. (In Russ.).