Preliminary studies on decontamination of some dried herbal products by gamma irradiation

Dynamic Chiropractic

关键词: Dried herbal products;    gamma irradiation;    microbial decontamination;    microbial load.;   

DOI  :  10.5897/JMPR10.247

学科分类：医学（综合）

来源: MPA Media

【 摘 要 】

Seven dried herbal products (DHP) were decontaminated using gamma radiation. The microbial loads (total viable count, TVC) of the raw and irradiated products were determined using the methods of serial dilutions and pour plate. Based on international standards for microbial load, the effective decontamination doses were determined for the DHP. The range of TVC for the DHP was 105to 109cfu/g. Milled roots ofCryptolepis sanguinolentaand milled stems and leaves ofDesmodium adscendenshad the highest counts of 8.0 × 108and 2.0 × 109cfu/g, respectively. Powdered seeds ofMoringa oliferaandGriforniasimplicifoliaand the seeds ofVoacangaafricanushad relatively low TVCs of 6.4 × 105, 6.6 × 106and 1.3 × 106cfu/g, respectively. Irradiation with medium doses of 2.5 to 7.5 kGy reduced microbial loads of the DHP by 3 to 6 log cycles. A dose of 10 kGy reduced the microbial load by 4 to7 log cycles and a dose of 15 kGy eliminated viable cells from all the DHP. Effective decontamination doses for the DHP were estimated to range from 2.5 to 10.0 kGy. Decontamination using gamma irradiation can improve the microbial quality and enhance the safety of DHP for both the domestic and export markets.

【 授权许可】

Unknown