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Objective To investigate the optimal sterilization effects of ultra-high temperature (UHT) sterilization processes on thermophilic spores in plant-based drinks, and construct a UHT moderate sterilization model. Methods The physicochemical properties of 6 types of functional plant-based drinks (FPD) were compared, to determine the main changes in physicochemical indicators and the objects of characteristic drinks. The effects of pH, viscosity and solid content on the UHT sterilization effect against thermophilic spores were investigated, and a regression model was constructed. Results The pH and viscosity significantly influenced the UHT sterilization F-value (P<0.05), while the effect of solid content was found to be relatively minor. The linear fitting coefficients of pH and viscosity for the F0 values were determined to be 208.927 (P<0.05) and 23.767 (P<0.01), respectively, while the nonlinear fitting coefficients were found to be 171.067 (P<0.05) and 0.543 (square variable value, P<0.05). These results indicate that the sterilization effectiveness weakened as the values of pH and viscosity increased. When the temperature reached 130 ℃, the significance of both parameters diminished, whereas the significance of the solid content coefficient was observed to increase, with the P decreasing to approximately 0.03. The predicted values of the models and the actual F0 values showed a generally close correlation, with fitting trends resulting in R2 values of 0.868 (linear) and 0.869 (nonlinear), indicating that the model possesses a high level of predictive performance. Conclusion The constructed UHT model can accurately fit the sterilization parameters and predict the effect according to the physicochemical properties of the plant-based drinks. This study provides essential guidance for the design of the UHT sterilization process for FPD, ultimately enhancing the nutritional and flavor quality of the drink products.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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