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Исследования влияния ультразвуковой обработки на стойкость напитков на основе зернового сырья

Исследования влияния ультразвуковой обработки на стойкость напитков на основе зернового сырья

Abstract

At present producers of soft drinks pay great attention to the development of products using natural ingredients. The purpose of the research was to study the influence of ultrasound on polygrain drink shelf life. It is revealed that such drinks have a rather short shelf life if not subjected to any treatment. The analysis of earlier published papers devoted to the influence of ultrasonic waves that possess a great amount of mechanical energy and cause a number of physical, chemical and biological phenomena has been performed. The influence of intensive ultrasonic radiation ranging from 45 to 90 W/cm2 and lasting for 2, 3, 5 minutes on the amount of microorganisms in a polygrain drink has been studied. The results of the conducted research showed that by the 6th day of the experiment the amount of microorganisms in the untreated drink was 6 times the amount in the initial sample. As for organoleptic characteristics, their worsening was observed, sour taste and smell, and turbidity being developed in the drink. It has been proved that ultrasonic treatment of the drink approximately two times increases its shelf life. It has also been established that 2 3 min treatment isn't sufficient to achieve the desired effect. The study has also shown that the increase in intensity of ultrasonic radiation decreases the amount of microorganisms. The 5 min treatment and the ultrasonic wave intensity of 90W/cm2 have been established to be the optimum mode. At this mode the quantity of microorganisms has decreased by 92 95% in comparison with the control sample. The technological scheme of polygrain drink production including the stage of ultrasonic treatment aiming at the increase of polygrain drink shelf life from 7 to 14 days has been developed.

В последнее время производители напитков уделяют большое внимание разработке продуктов на натуральной основе. Целью данной работы являлось исследование влияния ультразвука на стойкость готового полизернового напитка. Выявлено, что данные напитки без какой-либо обработки имеют относительно небольшой срок годности. Проанализированы ранее опубликованные работы по влиянию ультразвуковых волн, которые обладают большой механической энергией и вызывают ряд физических, химических и биологических явлений. В работе изучено влияние интенсивного излучения ультразвука в диапазоне от 45 до 90 Вт/см 2, продолжительностью 2, 3, 5 минут на содержание микроорганизмов в полизерновом напитке. По результатам проведенных исследований выявлено, что в необработанном напитке уже на шестой день содержание микроорганизмов относительно исходного образца увеличилось в 6 раз; что касается органолептических показателей, то было отмечено их ухудшение, напиток приобретает кислый вкус и запах, мутнеет. Доказано, что ультразвуковая обработка увеличивает его срок годности приблизительно в два раза. В ходе эксперимента было также установлено, что продолжительность обработки ультразвуком в течение 2 и 3 минут не достаточно для достижения планируемого эффекта. Показано, что при увеличении интенсивности излучения обработки ультразвуком содержание микроорганизмов снижается. Установлен оптимальный режим обработки продолжительностью 5 минут интенсивностью ультразвуковых волн 90 Вт/см 2. При данном режиме количество микроорганизмов снизилось на 92-95 % по сравнению с контролем. Разработана технологическая схема приготовления полизернового напитка с включением стадии обработки ультразвуком с целью повышения стойкости полизернового напитка в два раза с 7 до 14 суток.

Keywords

ПОЛИЗЕРНОВОЙ БЕЗАЛКОГОЛЬНЫЙ НАПИТОК, УЛЬТРАЗВУК, СРОК ГОДНОСТИ, БАКТЕРИАЛЬНАЯ ОБСЕМЕНЕННОСТЬ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
gold