ТЕРМОГРАВіМЕТРИЧНЕ ДОСЛіДЖЕННЯ ЕКСТРУДОВАНИХ ТА НАТИВНИХ ВИДіВ КРОХМАЛЮ
Віталій Яковлевич Пічкур,Максим Михайлович Лазаренко,Олександр Миколайович Алєксєєв,Володимир Миколайович Ковбаса,Михайло Васильович Лазаренко +4 more
TL;DR: In this article, a parallel between the type of crystal structure and the amount of capillary and adsorption-bound moisture for native types of starch was drawn in the paper, which characterized the influence of crystal structures on the properties of extrudates and their amorphous structure.
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Abstract: Most of the literature data, aimed at studying the structural features of native starch contain a large amount of information based on X-ray diffraction, which allows very accurately characterize the structure of starch granules. However, the issue of the number and forms of moisture bonds in the starch composition is still not fully disclosed. Using thermogravimetric and differential-thermal research methods, the values of the amount of capillary- and adsorption-bound moisture, as well as the values of the activation energy of water molecules in the extruded and native types of starch of different origin were obtained. During the data analysis, a parallel between the type of crystal structure and the amount of capillary- and adsorption-bound moisture for native types of starch was drawn in the paper. The results characterize the influence of crystal structures of the output starch on the properties of extrudates and their amorphous structure. The results obtained allow a better understanding of the fundamental differences in the technological indicators of native and extruded types of starch.
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Citations
Influence of Water on the Structure and Dielectric Properties of the Microcrystalline and Nano-Cellulose
Kostiantyn M. Kovalov,O. M. Alekseev,M. M. Lazarenko,Yu. F. Zabashta,Yurii E. Grabovskii,Sergii Yu. Tkachov +5 more
TL;DR: It is shown that at the increase of concentration of water in a hydrated shell, the reorganization of molecules of cellulose in the surface of crystallites takes place, and as a result, their transversal size and crystallinity increase.
Low-Temperature Dielectric Relaxation in the System Silica Gel – Undecylenic Acid
M. M. Lazarenko,K. I. Hnatiuk,Sergei Alekseev,K. S. Yablochkova,Roman Dinzhos,Filip Ublekov,M. V. Lazarenko,D. Andrusenko,Alexander N. Alekseev +8 more
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TL;DR: In this article, the influence of silica gel pores size on the structure and dielectric properties of the nanocrystals of undecylenic acid with the view of determining molecular mechanisms of the possible pharmacological activity of similar substances was discussed.
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Melting of 1-octadecene inside the pores of open-morphology silica gel: thermodynamic model and experimental studies
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TL;DR: In this paper, a model of crystalline compounds inside the nanopores of open-morphology porous systems was studied on a model system, consisted of 1-octadecene and silica gels with different pore sizes, by means of thermogravimetry, differential scanning calorimetry and powder X-ray diffraction.
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Electric and Spectral Properties of Solid Water-Nanocellulose Systems in a Wide Range of Temperatures
M. M. Lazarenko,S.G. Nedilko,Sergei Alekseev,S. Yu. Tkachov,D. O. Shevtsov,V. Scherbatskyi,V. A. Barbash,K. S. Yablochkova,Michael V. Ushcats,V. I. Kovalchuk,D. A. Andrusenko,Diana Izvorska,Roman Dinzhos,O. M. Alekseev +13 more
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TL;DR: In this paper, gravimetric, electric, and spectral properties of the solid-state water-nanocellulose systems with different water content were reported, and it was determined by the behavior of the surface layers of the nanocrystals, surrounded by the hydrated shell.
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