The influence of the moisture content of raw materials on the structuring of the extrudates
DOI:
https://doi.org/10.5219/1189Keywords:
extrusion, gelatinization, starch, paste, moisture, structureAbstract
The article presents the results of studies on the model systems of extrudates conducted with a view to determining the function of moisture during the process of forming the structure of starch pastes. There was studied the influence of the moisture content of raw materials on a starch gelatinization point. Studies showed that 15% moisture content in raw materials is sufficient for its constituent phase - starch gelatinization, as well as for the transition of the whole mass to a fluid-viscous state. Further increase in the moisture content is accompanied by a decrease in a gelatinization point. In order to study the influence of moisture on the formation of a porous structure of extrudates, we studied the relationship between the different-type starch pastes and the degree of its transparency and its embrittlement temperature. It has been found that during the process of thermal and mechanical impacts, there occurs the process of the formation of a structure of starch pastes, in particular, samples with the different moisture contents can have an amorphous or crystalline structure. There has been established the relationship between the moisture content of raw materials on the modulus of elasticity of starch pastes based on them. The modulus of elasticity of samples was determined one hour (cooling time to room temperature) and one week after obtaining the starch paste. The above studies showed that minimal physico-chemical and mechanical transformations occur in starch pastes, which are in an amorphous state, that is, in the conditions of a low moisture content. We have established that the moisture content of raw materials, on the one hand, ensures the transition of a high-dispersive phase to a fluid state, or implementing the ex process of extrusion, and on the other hand, influences on the formation of a porous structure in the extrudates.
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Abramov, O. V. 2011. The main laws of the extrusion process of processing model food media. Storage and processing of agricultural raw materials, vol. 4, p. 10-13.
Makowska, A., Baranowska, H. M., Michniewicz, J., Chudyc Przemysław, S., Kowalczewski, Ł. 2017. Triticale extrudates – Changes of macrostructure, mechanical properties and molecular water dynamics during hydration. Journal of Cereal Science, vol. 74, p. 250-255. https://doi.org/10.1016/j.jcs.2017.03.002 DOI: https://doi.org/10.1016/j.jcs.2017.03.002
Alekseeva, E. I. 2007. The technology of obtaining food extrudates based on products of grinding amaranth grain. Collection of materials of the V International scientific and practical conference "Technologies and products of healthy nutrition. Moscow : RAAS, p. 27-32.
Berk, Z. 2012. Food Process Engineering and Technology. Cambridge, Massauchusetts : Academic Press, p. 744. ISBN 978-0-12-812018-7.
Blanshard, J. M. V. 1987. Starch. In Galliard, T. Properties and potential. Amsterdam, Netherland : Elsevier, 151 s. ISBN 9780471913269.
Hallam, C. N., Gabbott, I. P. 2019. Increasing tensile strength by reducing particle size for extrudate-based tablet formulations. Journal of Drug Delivery Science and Technology, vol. 52, p. 825-830. https://doi.org/10.1016/j.jddst.2019.05.049 DOI: https://doi.org/10.1016/j.jddst.2019.05.049
GOST 2874-82 Drinking water, TU 15-1142-91.
GOST 7697-82 Corn starch. TU 15-1142-91.
GOST 7699-78 Potato starch, TU 15-1142-91
Karpov, V. G. 2000. Development of technology for new starch products by extrusion method : dissertation theses. Moscow: All-Russia Research Institute for Starch Products, p. 48.
Mezreb, K., Goullieux, A., Ralainirina, R., Queneudec, M. 2006. Effect of sucrose on the textural properties of corn and wheat extrudates. Carbohydrate Polymers, vol. 64, no. 1, p. 1-8. https://doi.org/10.1016/j.carbpol.2005.09.007 DOI: https://doi.org/10.1016/j.carbpol.2005.09.007
Kraus, S. V. 2004. Improving the technology of extrusion processing of starch-containing grain raw materials : disertation theses. Moskow : All-Russia Research Institute for Starch Products, 428 p.
Litviak, V. V. 2013. Development of the theory and practice of modifying starch-containing raw materials with a view to creating new products : dissertation theses. Minsk : Scientific and Practical Center of the National Academy of Sciences of Belarus for Food, p. 67.
Morteza J., Koocheki, A., Milani, E. 2017. Effect of extrusion cooking on chemical structure, morphology, crystallinity and thermal properties of sorghum flour extrudates. Journal of Cereal Science, vol. 75, p. 324-331. https://doi.org/10.1016/j.jcs.2017.05.005. DOI: https://doi.org/10.1016/j.jcs.2017.05.005
Martirosyan, V. V. 2013. Scientific and practical aspects of the use of extrudates of grain raw materials in the technology of preventive food products: disertation theses. Moscow, p. 37.
Gümüşay, Ö. A., Şeker, M., Sadıkoğlu, H. 2019. Response surface methodology for evaluation of the effects of screw speed, feed moisture and xanthan gum level on functional and physical properties of corn half products. Journal LWT, vol. 111, p. 622-631. https://doi.org/10.1016/j.lwt.2019.05.083. DOI: https://doi.org/10.1016/j.lwt.2019.05.083
Wani, S. A., Kumar, P. 2016. Development and parameter optimization of health promising extrudate based on fenugreek oat and pea. Food Bioscience, vol. 14, p. 34-40. https://doi.org/10.1016/j.fbio.2016.02.002 DOI: https://doi.org/10.1016/j.fbio.2016.02.002
Brahma, S., Weier, S. A., Rose, D. J. 2017. Moisture content during extrusion of oats impacts the initial fermentation metabolites and probiotic bacteria during extended fermentation by human fecal microbiota. Food Research International, vol. 97, p. 209-214. https://doi.org/10.1016/j.foodres.2017.04.019 DOI: https://doi.org/10.1016/j.foodres.2017.04.019
Saravacos, G., Kostaropoulos, A. E. 2016. Handbook of Food Processing Equipment. Switzerland: Springer International Publishing, p. 781. ISBN 978-3-319-25020-5.
Masavang, S., Roudaut, G., Champion, D. 2019. Identification of complex glass transition phenomena by DSC in expanded cereal-based food extrudates: Impact of plasticization by water and sucrose. Journal of Food Engineering, vol. 245, p. 43-52. https://doi.org/10.1016/j.jfoodeng. 2018.10.008 DOI: https://doi.org/10.1016/j.jfoodeng.2018.10.008
Beckab, S. M., Knoerzerb, K., Foersterc, M., Mayod, S., Arcota, C. P. J. 2018. Low moisture extrusion of pea protein and pea fibre fortified rice starch blends. Journal of Food Engineering, vol. 231, p. 61-71. https://doi.org/10.1016/j.jfoodeng.2018.03.004 DOI: https://doi.org/10.1016/j.jfoodeng.2018.03.004
Masatcioglu, T. M., Ng, P. K. W., Koksel, H. 2014. Effects of extrusion cooking conditions and chemical leavening agents on lysine loss as determined by furosine content in corn based extrudates. Journal of Cereal Science, vol. 60, no. 2, p. 276-281. https://doi.org/10.1016/j.jcs.2014.06.008 DOI: https://doi.org/10.1016/j.jcs.2014.06.008
Van Lengerich, B., Meuser, F., Pfaller, W. 1989. Exstrusion cooking of Wheat products. In Pomeralz, Y. Whet Uni Qui. Structure, transition of starch paste processing and use properties and products. St. Paul, Minnesota, USA : American Association of cereal chemists, p. 395-419.
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