Sterilization of Turmeric by Atmospheric Pressure Dielectric Barrier Discharge Plasma

被引:7
|
作者
Salarieh, Setareh [1 ]
Dorranian, Davoud [1 ]
机构
[1] Islamic Azad Univ, Biotechnol Engn Lab, Plasma Phys Res Ctr, Sci & Res Branch, Tehran, Iran
关键词
sterilization; DBD plasma; atmospheric pressure; decontamination; positive (negative) Gram bacteria; radio frequency plasma; bacillus subtilis; ETHYLENE-OXIDE; INACTIVATION;
D O I
10.1088/1009-0630/15/11/09
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
In this study atmospheric pressure dielectric barrier discharge (DBD) plasma has been employed for sterilizing dry turmeric powders. A 6 kV, 6 kHz frequency generator was used to generate plasma with Ar, Ar/O-2, He, and He/O-2 gases between the 5 mm gap of two quartz covered electrodes. The complete sterilization time of samples due to plasma treatment was measured. The most important contaminant of turmeric is bacillus subtilis. The results show that the shortest sterilization time of 15 min is achieved by exposing the samples to Ar/O-2 plasma. Survival curves of samples are exponential functions of time and the addition of oxygen to plasma leads to a significant increase of the absolute value of time constant of the curves. Magnitudes of protein and DNA in treated samples were increased to a similar value for all samples. Taste, color, and solubility of samples were not changed after the plasma treatment.
引用
收藏
页码:1122 / 1126
页数:5
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