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Grain landscape and dielectric properties of ceramics based on sodium,calcium,strontium niobates,depending on the synthesis and sintering conditions,and mechanical processing

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Journal of Advanced Dielectrics 2022年第1期12卷 6-11页

作者： J.Y.Zubarev A.V.Nazarenko A.V.Nagaenko L.A.Reznitchenko Research and Technology Unit FGI SPA SET of the MIA RF Rostov-on-Don 344000Russia Research Institute of Physics Southern Federal University 194 Stachki Ave.Rostov-on-Don344006Russia

The properties studying results of ceramics based on strontium,calcium and sodium niobates,which vary from the conditions of synthesis,sintering,and mechanical processing,are *** evolution of the grain structure of objects is traced depending on their phase filling during concentration changes in the composition and thermodynamic prehistory(preparation conditions).

关键词： Layered perovskite-like compounds binary systems pyroniobates of calcium and strontium microstructure mechanoactivation

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Functional films based on mechanoactivated starch with prolonged release of preservative

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Food Bioscience 2022年第3期47卷 810-818页

作者： I.M.Lipatova A.A.Yusova L.I.Makarova G.A.Krestov Institute of Solution Chemistry of the Russian Academy of Sciences 1 Akademicheskaya St.Ivanovo153045Russia

Use of active edible films containing an antimicrobial agent-a new method of extending the shelf life of food *** the controlled release of the preservative from the film is an urgent *** work aims to introduce a new environmentally friendly process for the production of antifungal starch films with a prolonged release of a preservative using mechanoactivation in a rotor-stator device (RSD).Active films based on mechanoactivated starch hydrogels containing 0–5.0% (w/w) benzoic acid as a preservative and chitosan as a solubilizing additive (St-BA-Ch),as well as films containing sodium benzoate (St-SB) for comparison,were obtained by the casting *** were characterized using optical and atomic force microscopy,X-ray diffraction and tensile and moisture permeability testing *** was found that benzoic acid is present in the St-BА-Ch-films in the form of submicron ***-BА-Ch films showed greater tensile strength and a lower release rate of the preservative into model media compared to St-SB *** is established that mechanical activation of casting hydrogels in RSD allows increasing the strength films by an average of 2 times,as well as reducing the release rate of the preservative and the vapor permeability of the *** antifungal activity of the films was confirmed using Aspergillus *** developed active St-BА-Ch film can be recommended for use in the food industry to extend the shelf life of food products.

关键词： Starch films Benzoic acid Sodium benzoate mechanoactivation Rotor–stator device Mechanical and barrier properties

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