Effects of Pulsed Light on Antibiotics Degradation and Quality of Auricularia auricula and Its Extract
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Abstract:
In this experiment, Auricularia auricula and its extract were used as the test objects. The degradation of quinolone antibiotics (enrofloxacin and ciprofloxacin) in Auricularia auricula and its extract as well as their quality changes were studied under different pulsed light treatment conditions. The results showed that when the fresh Auricularia auricula was treated with high intensity pulsed light, a pulsed light distance of 5 cm and an antibiotic content of 0.5 mg/kg could lead to the highest degradation rates of enrofloxacin and ciprofloxacin (82.84% and 81.10%, respectively) after 30 times of pulsed light treatment. The total sugar content of Auricularia auricula significantly decreased (by 12.25%), with other physicochemical indexes, including crude protein, crude fat, crude fiber and ash content changing insignificantly (P>0.05). The nutritional components of the treatedAuricularia auricula still met the national standard requirements. Meanwhile, the degradation of the two antibiotics was 99.17% and 98.61%, respectively, when the irradiation distance of pulsed light was 5 cm, the extract was diluted five times, the antibiotic concentration was 0.5 mg/kg, and the number of pulsed light treatment was 30 times. The chroma cahnge ΔE was 1.51 after 30 times of the pulsed light treatment, though there were no obvious effects on the pH and light transmittance. The pulsed light treatment could degrade more than 81% of antibiotics in Auricularia auricula and 98% of antibiotics in its extract, indicating that it can be used to treat antibiotics and effectively preserve its quality. The finding provides new ideas for antibiotic control of edible fungi.
