Статті
Постійне посилання колекціїhttps://dspace.nuft.edu.ua/handle/123456789/7522
Переглянути
4 результатів
Результати пошуку
Документ Study of the extraction kinetics of flavonoids from the fruits of sophora japonica L. Sophora Japonica L. with sunflower oil(2024) Pelekhova, Liubov; Usatyuk, Svitlana; Tyshchenko (Usatiuk), Olena; Honcharov, ViacheslavAmong the large number of biologically active substances contained in the fruits of Japanese sophora, the extraction of flavonoids, substances of medium polarity, is particularly important. The process of extracting them with vegetable oil from fruits is quite complicated. The object of research is the kinetics of the process of extracting flavonoids from Japanese sophora fruits with sunflower oil. The influence of temperature, duration, and hydraulic modulus on the extraction process, as well as on the derivation of the equation of the mathematical model, is studied. Mathematical modeling methods are used in the research. Processing of experimental data for the study of extraction kinetics in the vegetable oil:vegetable raw material system is carried out using the Statistica statistical package. In order to derive the equation of the mathematical model of the process of extracting flavonoids from Japanese sophora with sunflower oil, the influence of temperature, duration and hydromodulus on the process of transition of the target component – flavonoids to the extract – is investigated. A mathematical model of the dependence of flavonoids on the hydromodulus (H=10–25), temperature (t=25–45 °С) and the duration of the extraction process of Japanese sophora (τ=2–10 h) is obtained, which makes it possible to calculate the content of flavonoids with an average relative with an error within 5 %. On the basis of the conducted experimental studies, basic technological schemes for obtaining unrefined sunflower oil of increased biological value are developed, which includes the following stages: preparation of raw materials, treatment of prepared raw materials with sunflower oil during dilution and mixing, separation of oil from raw materials by filtering. The proposed technology is promising, as its implementation is possible not only in food industry enterprises, but also in restaurant establishments, as it does not require expensive equipment, additional production premises and special training of personnel. The mathematical models of the extraction process of Japanese sophora with unrefined sunflower oil proposed in the work allow to select the extraction parameters with a high degree of probability and offer the consumer flavonoid-enriched sunflower oil of increased biological value.Документ Інтенсифікація процесу та кінетика екстрагування цільових компонентів з хмелю(2020) Запорожець, Юлія Владиславівна; Бурлака, Тетяна ВасилівнаРозглянуто вплив температури та гідромодуля на процес вилучення цільових речовин із хмелю при виробництві екстрактів. Встановлено вплив температури та гідромодуля на інтенсифікацію процесу екстрагування. The influence of temperature and hydromodule on the process of extraction of target substances from hops in the production of extracts is considered. The influence of temperature and hydromodule on the intensification of the extraction process is established.Документ Раціональні режими сушіння ріпаку(2021) Пазюк, Вадим Михайлович; Шеманська, Євгенія Іванівна; Пазюк, Даша ВадимівнаПредставлені дослідження із знаходженню раціональних режимів сушіння насіння ріпаку виходячи з кінетики сушіння та якісних характеристик. За якісну характеристику була прийнято значення кислотного числа олії та лабораторна схожість насіння ріпаку на 7 добу пророщування. Експериментальні дослідження кінетики процесу сушіння насіння ріпаку проводились на конвективному сушильному стенді із застосуванням автоматичної програми збору та обробки інформації, що дає можливість отримати більш точні дані експерименту. За отриманими даними експерименту за допомогою автоматичної програми збору та обробки інформації побудовані графіки кінетики процесу від впливу температури теплоносія. На представлених графіках представлені криві сушіння та криві швидкості сушіння, що характеризують процес сушіння, який проходить в період падаючої швидкості сушіння.Документ Improving the operation of a drum grain dryer with justification of the low-temperature mode parameters(2020) Pazіuk, V.; Dub, V.; Tereshkin, O.; Zahorulko, Andrii; Lebedynets, I.; Pankov, Dmitry; Hotvianska, A.The proposed engineering and tech-nological solutions are aimed at improv-ing the operation of a low-temperature drum grain dryer by using a combined mechanical vibration exciter, with the further justification of low-temperature regime parameters. Existing vibration technologies imply the high-temperature drying of food grains with further utili-zation of spent heat carrier for reheat-ing it. In this case, the high-temperature drying of cereals and seed crops (grains, onions, etc.) does not make it possible to maintain high germination, emphasizing the need for low-temperature treatment, which, in this case, reduces the efficien-cy of spent heat carrier. Therefore, to improve the efficiency of the drying pro-cess and technology, it has been pro-posed to employ vibration low-frequen-cy technologies that ensure seed quality.The trajectory and the kinetic ener-gy of the drum container with a com-bined mechanical vibration exciter have been calculated for the improved vibratory drum grain dryer. The ratio-nal vibration intensity for seed dry-ing providing the following kinetic characteristics has been established: vibration speed, to 0.03 m/s; vibration acceleration, 30 m/s2; vibration inten-sity, 2.6 m2/s2; at amplitude vibration not exceeding 2 mm. It has been also established that the intense warming of a barley layer occurs at a tempera-ture of 50 °C and a humidity of 13.5 %, the final temperature is 42.4 °C, and, at 40 °C, is, accordingly, 35.4 °C. This has confirmed that the low-tempera-ture drying of barley seeds of the vari-ety “Stalker” (Ukraine) takes place during the periods of constant and falling drying speed characterized by a high level of germination (95...93 %).