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  Тип елементу:Документ,

  Identifying the influence of the concentration of surfactants on the technological indicators of aerosol emulsion

  (PC тесhnology сеntеr, 2024) Putyatin, Bogdan; Bliznjuk, Olga; Masalitina, Nataliia; Bezpal'ko, Valentyna; Zhukova, Liubov; Filenko, Olesia; Horiainova, Viktoriia; Ponomarova, Maryna; Ryabev, Anton; Beliuchenko, Dmytro

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  The object of the study is an emulsion system containing emulsifiers (Emulgin B2, Lanett SX), wetting agents (propylene glycol, glyceryl cocoate) and sodium laureth sulfate as a foaming agent. The main problem solved in the study is to ensure rational technological properties of emulsion systems in aerosol form under variable storage and use conditions. The results obtained showed that to ensure maximum emulsion stability during 7 and 30 days of storage, the optimal concentrations of Emulgin B2 are 2.75…3.0 %, and Lanett SX is 2.0…2.5 %. To achieve the desired foaming ability (80…85 %) and foam stability (75…80 %), it is recommended to use sodium laureth sulfate at a concentration of 0.20…0.22 %. It was found that the wetting agents – propylene glycol (7 %) and glyceryl cocoate (1.5 %) – provide optimal system viscosity within 35…40 mPa·s. The stability of the emulsion is ensured by the formation of strong interfacial films using Lanett SX, while Emulgin B2 improves the thermal stability of the system. Foaming properties are provided by the ability of sodium laureth sulfate to reduce interfacial tension, however, too high concentrations can lead to foam oversaturation and deterioration of its stability. The features of the obtained results are that specific concentration limits of the components are justified, at which the necessary stability and functionality of the emulsion system are ensured. This allows solving the problem of achieving optimal characteristics of the emulsion system during storage and use, ensuring comfortable application to the skin and a stable foam structure. The scope of application of the obtained results is the cosmetic industry

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  Тип елементу:Документ,

  Secondary Thermoplastic Modified Wood-Polymer Composite with Increased Technological, Mechanical and Dielectric Properties

  (Lifescience Global Canada Inc., 2024) Kopylov, Serhii; Cherkashina, Аnna; Bliznyuk, Oleksandr; Gorbunov, Kostiantyn; Petrov, Serhii; Filenko, Olesya; Makhonin, Mykola; Tsereniuk, Oleksandr

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  The article describes the development of new formulations of wood-polymer composites with a modified polymer matrix and the study of their technological, mechanical and dielectric properties. The research aim is to create a new composition of wood-polymer composites based on secondary raw materials with an improved set of technological, mechanical and dielectric properties, namely, the modification of the polymer matrix and the development of a new technology for its production. The optimal composition of the polymer matrix and modification influence of the wood polymer composites polymer matrix on the physical, mechanical and dielectric properties of the samples are determined. Strength, impact resistance, abrasion, mechanical and dielectric properties are studied. A description of the climatic influences on the wood-polymer composites including the influence of moisture and temperature is given.

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  Тип елементу:Документ,

  Use of thistle seeds of modified composition in chocolate mass technology

  (PC тесhnology сеntеr, 2023) Stankevych, Serhii; Zabrodina, Inna; Lutsenko, Maryna; Derevianko, Іryna; Zhukova, Liubov; Filenko, Olesia; Ryabev, Anton; Tonkoshkur, Maksym; Zolotukhina, Olena; Ashtaeva, Natalia

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  The object of the study is the analytical values of lipids of milk thistle seeds of a modified composition, namely acid and peroxide values, as well as the induction period of lipids of chocolate mass with the addition of milk thistle seeds. The paper substantiates rational parameters of thistle seed processing for the inactivation of lipases and lipoxygenases. Approximate dependences of the acid and peroxide values of thistle seed lipids on the pH of the wetting solution and the wetting degree of seeds were obtained. This makes it possible to substantiate such rational processing parameters of thistle seeds that inhibit the accumulation of free fatty acids and primary oxidation products in seeds during storage. An increase in the induction period of the oxidation of the lipid component of the chocolate mass with the use of thistle seeds of a modified composition was proven, which is 2.5 times higher than the induction period of the chocolate mass sample with thistle seeds with a native enzyme complex. The research results make it possible to develop a technology of healthy chocolate mass using thistle seeds of a modified composition, the lipid component of such mass is stable to oxidation and hydrolysis. The data obtained in the work are explained by an increase in the ability to inactivate lipolytic and lipoxygenase enzymes of milk thistle at high humidity in an acidic environment under the influence of microwave radiation. The advantage of the obtained results is the possibility of not violating the integrity of thistle seeds during the inactivation of the enzyme complex, which allows extending the shelf life of this raw material. An applied aspect of using the scientific result is the possibility of expanding the range of healthy chocolate masses with the use of thistle seeds

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  Тип елементу:Документ,

  Development of Transesterification Model for Safe Technology of Chemical Modification of Oxidized Fats

  (PC тесhnology сеntеr, 2022) Korchak, Mykola; Bragin, Oleksandr; Petrova, Olena; Shevchuk, Natalia; Strikha, Liudmyla; Stankevych, Serhii; Svishchova, Yana; Khimenko, Natalia; Filenko, Olesya; Petukhova, Olena

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  The object of research is the process of chemical transesterification of palm olein with increased oxidation indicators in the presence of potassium glyceroxide catalyst. Transesterification is an important method of fat modification. The use of fats with increased oxidation indicators leads to the deactivation of common catalysts and a decrease in the efficiency of the process. There is a need to increase the dosage of catalysts, increase the process temperature, which negatively affects the product quality. An alternative transesterification catalyst (potassium glyceroxide) was used for the transesterification of palm olein with increased oxidation indicators. Palm olein (CAS Number 93334-39-5) with standard indicators was used: melting point 22.4 °C, peroxide value 0.8 ½ O mmol/kg, anisidine value 0.3 c. u. Olein was subjected to heating at a temperature of 90 °C in order to increase oxidation indicators, after which it underwent transesterification. The difference in melting points of the initial and transesterified palm olein was used as a parameter of process efficiency. The maximum limit values of the oxidation indicators at which the process is effective are: peroxide value 12.7 ½ O mmol/kg, anisidine value 10.4 c. u. The difference in melting points is 12.1 °C, which indicates the efficiency of the process. The qualitative indicators of the obtained transesterified fat indicate compliance with DSTU 4336 (CAS Number 97593-46-9): melting point 34.5 °C, peroxide value 1.2 ½ O mmol/kg, anisidine value 1.0 c. u. The results of the research make it possible to use fat with increased oxidation indicators without pretreatment and predict the efficiency of ransesterification depending on the fat indicators. This will increase profitability and reduce production waste.

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  Тип елементу:Документ,

  Побудова економетричних моделей

  (Національний технічний університет "Харківський політехнічний інститут", 2019) Шпирко, А. О.

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