Substantiaton of selecting the method of pre-cooling of fruits

Authors

DOI:

https://doi.org/10.15587/1729-4061.2016.76235

Keywords:

pre­cooling, antioxidants, hydro­cooling, intensity of breathing, heat release of fruits, weight loss

Abstract

The research is devoted to the scientific substantiation of the feasibility of combination of pre­cooling the fruits and their treatment by antioxidant compositions before prolonged storage, as well as determining the optimal modes and methods of carrying out the given technological operation. The objects of research were the fruits of apple varieties Aydared, Golden Delicious, Simirenko Renet, Florin, the fruits of pear varieties Izyuminka Crimea and Conference, the fruits of plum varieties Voloshka and Stenley. Pre­cooling was conducted in three ways: by cold air in conventional storing chambers, by cold air in the chambers of intensive cooling and hydro­cooling in the solutions of antioxidant compositions. As a result of the studies, it was found that the most intensive method of pre­cooling is cooling by air at temperature minus 2…minus 4 oC and airflow velocity 3 m/s. Under such circumstances, general period of cooling to a temperature 0 oC of the apple fruits and pear fruits is about 2 hours and the plum fruits – slightly longer than 1 hour. The velocity constant of reduction in the intensity of breathing and heat release of fruits during intensive cooling exceeded the velocity constant of the analyzed indices during slow cooling by 4.3…6.6 times and during hydro­cooling by 1.2...1.6 depending on the type of fruit. Along with this, high speed of air motion increased the natural weight loss of fruits during cooling. The quantitative value of this indicator during intensive method was maximum and varied in the range of 0.56 % for the pear fruits to 0.44 % for the plum fruits. Combined method, which implies initial pre­cooling in the working solutions of antioxidant compositions and further cooling by the intensive method, was characterized by high velocity constant of reduction in the intensity of breathing and heat release of the fruits and low level of the natural loss weight. In this case, the quantitative value of the weight loss varied in the range from 0.005 % for plum fruits to 0.014 % for the apple and pear fruits.

Author Biographies

Marina Serdyuk, Tavria State Agrotechnological University, B. Khmelnitsky ave., 18, Melitopol, Ukraine, 72312

PhD, associate professor

Department of technology of processing and storage of agricultural products

 

Dmitrij Stepanenko, Melitopol State Pedagogical University named after Bohdan Khmelnytsky Lenin str., 20, Melitopol, Ukraine, 72313

PhD, associate professor

Department of "Ecology and Zoology"

Svitlana Baiberova, Tavria State Agrotechnological University, B. Khmelnitsky ave., 18, Melitopol, Ukraine, 72312

PhD, assistant

Department of technology of processing and storage of agricultural products

Nonna Gaprindashvili, Tavria State Agrotechnological University, B. Khmelnitsky ave., 18, Melitopol, Ukraine, 72312

PhD, associate professor

Department of technology of processing and storage of agricultural products

Alina Kulik, Tavria State Agrotechnological University B. Khmelnitsky ave., 18, Melitopol, Ukraine, 72312

PhD, Senior Lecturer

Department of technology of processing and storage of production of agriculture

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Published

2016-08-31

How to Cite

Serdyuk, M., Stepanenko, D., Baiberova, S., Gaprindashvili, N., & Kulik, A. (2016). Substantiaton of selecting the method of pre-cooling of fruits. Eastern-European Journal of Enterprise Technologies, 4(11(82), 62–68. https://doi.org/10.15587/1729-4061.2016.76235

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Section

Technology and Equipment of Food Production