Sterilization of Turmeric by Atmospheric Pressure Dielectric Barrier Discharge Plasma

作     者：Setareh SALARIEH Davoud DORRANIAN 

作者机构：Biotechnology Engineering Lab. Plasma Physics Research Center Science and Research Branch Islamic Azad University 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2013年第15卷第11期

页      面：1122-1126页

核心收录：

学科分类：1008[医学-中药学(可授医学、理学学位)] 1006[医学-中西医结合] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 100602[医学-中西医结合临床] 10[医学] 

主　　题：sterilization, DBD plasma, atmospheric pressure, decontamination, positive(negative) Gram bacteria radio frequency plasma bacillus subtilis 

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/Ou, He, and He/O2 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 rain is achieved by exposing the samples to Ar/O2 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.