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      Microbial assessment of medicinal herbs (Cnidii Rhizoma and Alismatis Rhizoma), effects of electron beam irradiation and detection characteristics

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          Abstract

          Medicinal herbs comprise of heavy microbial contaminations. This study aimed to assess microbial hazards including foodborne pathogens in 20 commercial medicinal herbs, Cnidii Rhizoma (C1–C10) and Alismatis Rhizoma (T1–T10) as well as to evaluate irradiation effects of E-beam on microbial load and detection chracteristics. Four samples (C5, C10, T1, T8) from both herbs with higher microbial load were selected for evaluating the irradiation effect of E-beam (up to 10 kGy) on microbial load and radiation-induced changes in detection markers by standard methods (Codex, Korean Food Code), such as direct epifluorescent filter technique/aerobic plate count (DEFT/APC), photostimulated luminescence (PSL), thermoluminescence (TL), and electron spin resonance (ESR). DEFT/APC revealed non-evidence of pre-sterilization of all samples. PSL differentiated irradiated samples (1, 5, and 10 kGy) of both herbs from non-irradiated (control: 0 kGy). Both TL and ESR methods validated PSL screening results by detecting radiation-induced markers from E-beam irradiated medicinal herbs.

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          Author and article information

          Contributors
          100-eun@hanmail.net
          kashifameer89@gmail.com
          maybreeze75@naver.com
          invertsugar@naver.com
          cmj5188@naver.com
          kjo1226@nikom.or.kr
          won10042@nikom.or.kr
          sang@knu.ac.kr
          jhkwon@knu.ac.kr
          Journal
          Food Sci Biotechnol
          Food Sci. Biotechnol
          Food Science and Biotechnology
          Springer Singapore (Singapore )
          1226-7708
          2092-6456
          1 November 2019
          May 2020
          : 29
          : 5
          : 705-715
          Affiliations
          [1 ] GRID grid.258803.4, ISNI 0000 0001 0661 1556, School of Food Science and Biotechnology and Food Bio-industry Research Institute, , Kyungpook National University, ; Daegu, 41566 Korea
          [2 ]Quality Certification Center, National Institute of Korean Medicine Development, Daegu, 41934 Korea
          [3 ] GRID grid.440552.2, ISNI 0000 0000 9296 8318, Institute of Food and Nutritional Sciences, , PMAS-Arid Agriculture University, ; Rawalpindi, 46300 Pakistan
          [4 ]Health Research Department, Health and Environment Institute of Daegu, Daegu, 42183 Korea
          Author information
          http://orcid.org/0000-0002-3875-1438
          Article
          PMC7221034 PMC7221034 7221034 701
          10.1007/s10068-019-00701-w
          7221034
          32419969
          7a89b28a-0f11-4692-acef-4a84e424af40
          © The Korean Society of Food Science and Technology 2019
          History
          : 3 April 2019
          : 18 September 2019
          : 15 October 2019
          Categories
          Article
          Custom metadata
          © The Korean Society of Food Science and Technology 2020

          DEFT/APC,Medicinal herb,Microbial load,Luminescence,ESR
          DEFT/APC, Medicinal herb, Microbial load, Luminescence, ESR

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