Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8892885 | Scientia Horticulturae | 2018 | 8 Pages |
Abstract
Inactivation of natural flora found on cv. 'Åalak' apricot surfaces was investigated using a newly designed UV-C treatment system equipped with four UV lamps and a rotating roller bearing. Multiple Point Source Summation (MPSS) Model was used to estimate UV light intensity field in this processing chamber. Although MPSS model over-predicted the UV intensity data, light intensity profile showed a good agreement with the radiometric measurements. UV-C treatment of apricots resulted in 3-log reduction in the number of total mesophilic aerobic bacteria (TAPC) at 32.3â¯Wâ¯mâ2 of average UV light intensity for 16â¯min at 31.01â¯kJâ¯mâ2 of UV dose whereas 2.38-log reduction was achieved for yeast and mould count (YMC) after 4â¯min of UV exposure at 7.75â¯kJâ¯mâ2 of UV dose. On the other hand, complete inactivation of coliform bacteria was observed after all treatments. Statistical analysis indicated that further extension of the exposure time did not cause any significant effect on the inactivation of natural flora of apricot surfaces. Additionally, the inactivation data obtained for TAPC and YMC were modelled by using log-linear regression, Biphasic model, log-linearâ¯+â¯tail, Weibull model, Weibull + tail, double Weibull and biphasicâ¯+â¯shoulder models. The inactivation kinetics of TAPC and YMC were best described by log linearâ¯+â¯tail model with the smallest root mean squared error (RMSE) and the highest regression coefficient (R2â¯>â¯0.90). These results suggest that UV-C treatment can be applied to control the natural flora on cv. 'Åalak' apricots. Use of a rotating roller bearing is highly appreciated in UV-C systems to provide equal radiation among fruit surfaces.
Keywords
Related Topics
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Agricultural and Biological Sciences
Horticulture
Authors
Bengi Hakguder Taze, Sevcan Unluturk,