Investigation of the influence of antioxidant compositions on development of microbiological spoilage in storage of fruits

The studies are devoted to the scientific grounding of expedience of after-harvest processing by antioxidant compositions for
preventing the development of pathogenic microflora on fruit surfaces during a long storage. For the studies were used apple fruits of
the varieties Aidared, Golden Dushesse, Renet Simirenka, pear fruits of the varieties Victoria, Crimea Raisin and Cure, plum fruits
of the varieties Voloshka, Stanley and Italian Ugorka. Fruits were processed by immersion in the following antioxidant compositions:
ACM is a mixture of dimethyl sulfoxide, ionol and polyethylene glycols; AARL – mixture of ascorbic acid, routin and lecithin;
DL – mixture of dimethyl sulfoxide, ionol and lecithin. Fruits, processed by water, were used as a control. Exposition – 10 seconds.
Storage was carried out at the temperature 0±1 ºС, relative air humidity 90–95 %. It was established that in the period of fruits laying
for storage, the mean amount of epiphyte microflora was fixed on surfaces of plump and pear fruits of the mean ripening term. In the
variety composition of epiphyte microflora prevailed spores of mesophyl aerobic and facultative-anaerobic microorganisms. Their
mean number on apple fruits surface was 9,6·103
CCU/g, pear fruits – 10,6 103
CCU/g, plump fruits – 18·103C
CCU/g. AOC processing
of all types of fruits essentially decreased the speed of both MAFAnM and micromycetes growth. It was demonstrated that the used
compositions in 2…3,5 times decreased the level of day losses from microbiological spoilage during the whole storage period. The
most positive effect was received at using compositions, based on dystinol and lecithin. Multifactor analysis determined that the
level of day losses from microbiological spoilage was mainly influenced by factors of raw material variety features (factor A) and
antioxidant compositions processing (factor D). The shares of influence are 24 and 21 % respectively.
Keywords: apple fruits, pear fruits, plump fruits, dimethyl sulfoxide, ionol, polyethylene glycols, after-harvest processing,
fungal molds.