http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
( Hai Yen Lee ),( Lay Ching Chai ),( Chai Fung Pui ),( Woan Chwen Wong ),( Shuhaimi Mustafa ),( Yoke Kqueen Cheah ),( Zuraini Mat Issa ),( Mitsuaki Nishibuchi ),( Ra Du Son ) 한국미생물 · 생명공학회 2011 Journal of microbiology and biotechnology Vol.21 No.9
There have been a number of studies conducted in order to compare the efficiencies of recovery rates, utilizing different protocols, for the isolation of L. monocytogenes. However, the severity of multiple cell injury has not been included in these studies. In the current study, L. monocytogenes ATCC 19112 was injured by exposure to extreme temperatures (60oC and -20oC) for a one-step injury, and for a two-step injury the cells were transferred directly from a heat treatment to frozen state to induce a severe cell injury (up to 100% injury). The injured cells were then subjected to the US Food and Drug Administration (FDA), the ISO-11290, and the modified United States Department of Agriculture (mUSDA) protocols, and plated on TSAyeast (0.6% yeast), PALCAM agar, and CHROMAgar Listeria for 24 h or 48 h. The evaluation of the total recovery of injured cells was also calculated based on the costs involved in the preparation of media for each protocol. Results indicate that the mUSDA method is best able to aid the recovery of heat-injured, freeze-injured, and heat-freeze-injured cells and was shown to be the most cost effective for heat-freeze-injured cells.
Transfer of Listeria monocytogenes between Abiotic Surfaces under Different Weights
Hai Yen Lee,Lay Ching Chai,Nor Ainy Mahyudin,Mitsuaki Nishibuchi,Radu Son 한국식품과학회 2014 Food Science and Biotechnology Vol.23 No.4
Cross contamination of Listeria monocytogenesfrom two different surfaces (plastic wrappers and stainlesssteel coupons) was simulated using a series of differentweights. Enumeration of transfer was based on surfacebacterial counts of biofilm stained surfaces. Direct contactbetween 2 surfaces has a constant rate of transfer that isindependent of the pressure applied. This is the first reporton the study of cross contamination between surfaces usingpressure to illustrate transfer of bacteria in a foodprocessing line.