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- ДокументДослідження дисперсного складу овочевого та фруктового напівфабрикатів як основної складової частини для напою смузі(2017) М. І. Погожих, Д. М. Одарченко, Є. Б. Соколова, І. М. ПавлюкДосліджено дисперсний склад овочевого та фруктового напівфабрикату, як основної складової частини для виробництва напою смузі. Завдяки отриманим диференціальним та інтегральним кривим встановлено ступінь подрібнення заморожених напівфабрикатів для смузі. Аналізуючи представлені функції розподілення частинок за лінійним розміром досліджуваних зразків, встановлено, що напівфабрикати томатний та перцевий більш однорідні за розподілом часток ніж фруктовий напівфабрикат. Запропоновано технологію виробництва заморожених фруктових та овочевих напівфабрикатів для смузі, яка дозволить розширити асортимент безалкогольних напоїв, збагатити організм людини цінними речовинами. Технологія виробництва основної складової частини для напою смузі передбачає отримання двох продуктів: плазми та жмиху з овочів та фруктів, що безпосередньо використовується для приготування напоїв, соків та смузі.
- ДокументInvestigation of the antagonistic activity of secondary metabolites of propionic acid bacteria(2017) L. Krupytska, L. Kaprelyants, L. TrufktiТhe practical value of the culture liquid of probiotic bacteria was demonstrated. The culture fluid contains the products of vital activity of probiotic bacteria. It is the product of waste in the manufacture of classical probiotics. The culture liquid can be used to create metabiotics, due to the content of valuable exometabolites in its composition. The results of data on the positive effect of various amounts of culture liquid of propionic acid bacteria on the growth of bifidobacteria were presented. Microbiological studies have shown that 2 – 3 % of the filtrate was effectively reflected in the accumulation of biomass of bifidobacteria. The antagonistic activity of the culture fluid filtrate 2 – 3 % of the strain P.shermanii-4 against opportunistic (Escherichia coli-ATCC 25922, Staphylococcus aureus -ONU-223, Bacillus cereus-ATCC 11778) and pathogenic microorganisms (Salmonella enteritidis ‑ ONU-466) was studied. It was found that the use of a 2 % culture supernatant inhibits the growth of all opportunistic microorganisms, in addition to the pathogenic strain Salmonella enterica-ONU-466. With an increase in the dose of the filtrate, a small delay in the growth of Salmonella enteritidis-ONU-466 and an increase in the sensitivity of opportunistic microorganisms were observed.
- ДокументModelling of the process of micromycetus survival in fruit and berry syrups(2017) L. Osipova, V. Kirillov, N. Khudenko, T. SugachenkoIn order to develop methods for preserving fruit and berry syrup, which exclude the use of high-temperature sterilization and preservatives, the survival of spores of micromycetes (B. nivea molds) in model media with different concentration of food osmotically active substances (sucrose, ethyl alcohol, citric acid) at a certain concentration of lethal effects on microorganisms. It has been established that model media (juice based syrups from blueberries) with a mass content of 4 % and 6 % alcohol, 50 % sucrose, 1 % and 2 % titrated acids, have a lethal effect on spores of B. nivea molds. The regression equation is obtained expressing the dependence of the amount of spores of B. nivea molds on the concentration of sucrose, acid, alcohol and the storage time of syrups. The form of the dependence and direction of the connection between the variables is established – a negative linear regression, which is expressed in the uniform decrease of the function. The estimation of quality of the received regression model is defined. The deviations of the calculated data from the data of the initial set are calculated. The proposed model has sufficient reliability, since the regression function is defined, interpreted and justified, and the estimation of the accuracy of the regression analysis meets the requirements.
- ДокументQuality parameters of wine grape varieties under the influence of different vine spacing and training systems(2017) O. Tkachenko, A. PashkovskiyPhysicochemical and biochemical indices, which characterize quality of white wine grape varieties Zagrey and Aromatnyi of selection of NNC «IV&W named after V. Ye. Tairov», (harvest of 2016) were determined. The field trial which includes various variants of planting density and vine training systems, made it possible to study the influence of viticulture practices on the criteria of carbohydrate-acid and phenolic complex, oxidative enzyme system of grapes. Low-density plantings of Aromatnyi variety (2222 vines per ha) were characterized by harvest that slightly exceeded the grapes obtained from dense plantations (4000 vines per ha) in terms of carbohydrate-acid and phenolic complexes. The most optimal in terms of the mass concentration of sugars, phenolic substances, polymer forms, macerating ability of must, activity of oxidizing enzyme system was cultivation of this variety on a 160 cm – high trunk. Growing grapes of Zagrey variety with vine spacing, corresponding to 4000 plants per ha, contributed to obtaining harvest with optimal parameters of carbohydrate-acid complex, low technological reserve and mass concentration of phenolic compounds, moderate macerating ability and activity of monophenol monooxygenase in must. Training vines of this variety on a 40 cm high trunk with vertical shoot positioning led to significant deterioration of grape quality due to increased content of phenolic substances and their polymer forms, high macerating capacity of must.
- ДокументLuminescent determination of ascorbic acid in dietary supplements(2017) E. Malinka, S. Beltyukova, Ie. Cherednychenko; https://doi.org/10.15673/fst.v11i2.511The article presents the results of the ascorbic acid (AA) determination with using a complex of an Tb (III) ion with ciprofloxacin (CF) as a lanthanide luminescent marker. The luminescent properties of the Tb (III)-CF complex in the presence of AA were studied. The excitation and luminescence spectra, triplet level of ligand, the kinetics of the luminescence decay of the Tb(III)-CF complex in the presence of AA were analyzed. The excitation spectrum of the Tb (III)- CF complex has broad bands with maxima at 302 and 355 nm that corresponding to the n→π* electronic transition in the absorption spectrum of ligand. The luminesce spectra demonstrate the emission transitions arising from 5D4 energy level to 7Fj multiplet ground state. The luminescence of the Tb(III)-CF complex was found to be quenched by AA. It was established that the lifetime of the excited 5D4 state of the Tb (III) ion decreases with AA concentration increasing up to 0,25 mg/сm3. Luminescence quenching of the Tb (III)-CF complex by AA follows the Stern-Volmer relationship of AA. The Stern-Volmer constant K is 2478 dm3/mol. The biomolecular quenching rate constant kq is 1,25∙107 dm3/mol. The effect of luminescence quenching of the Tb (III)-CF complex was used to developing the procedure for determining of AA in the dietetic additives «Asvitol» and «Ascorbic acid». The linear calibration plot for AA was obtained over the concentration range of 0,02 to 0,25 mg/сm3.
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