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High-frequency, high-intensity electromagnetic field effects on Saccharomyces cerevisiae conversion yields and growth rates in a reverberant environment
Bioresource Technology ( IF 11.4 ) Pub Date : 2018-04-03 , DOI: 10.1016/j.biortech.2018.03.130
Emmanuel Bertrand , Christophe Pasquier , David Duchez , Sebastien Girard , Agnès Pons , Pierre Bonnet , Catherine Creuly , Claude-Gilles Dussap

Studies of the effects of electromagnetic waves on Saccharomyces cerevisiae emphasize the need to develop instrumented experimental systems ensuring a characterization of the exposition level to enable unambiguous assessment of their potential effects on living organisms. A bioreactor constituted with two separate compartments has been designed. The main element (75% of total volume) supporting all measurement and control systems (temperature, pH, agitation, and aeration) is placed outside the exposure room whereas the secondary element is exposed to irradiation. Measurements of the medium dielectric properties allow the determination of the electromagnetic field at any point inside the irradiated part of the reactor and are consistent with numerical simulations. In these conditions, the growth rate of Saccharomyces cerevisiae and the ethanol yield in aerobic conditions are not significantly modified when submitted to an electromagnetic field of 900 and 2400 MHz with an average exposition of 6.11 V.m−1 and 3.44 V.m−1 respectively.



中文翻译:

高频,高强度电磁场对混响环境中啤酒酵母转化产量和生长速率的影响

对电磁波对酿酒酵母的影响的研究强调需要开发仪器化的实验系统,以确保对博览会水平进行表征,从而能够明确评估其对活生物体的潜在影响。已经设计了由两个分开的隔室构成的生物反应器。支持所有测量和控制系统(温度,pH,搅拌和曝气)的主要元素(占总体积的75%)放置在暴露室内,而次要元素则暴露在辐射下。介质介电特性的测量可以确定反应堆辐照部分内部任何点的电磁场,并且与数值模拟一致。在这些条件下,啤酒酵母和有氧条件下的乙醇收率,如果分别受到平均暴露为6.11 Vm -1和3.44 Vm -1的900和2400 MHz电磁场的作用,则不会显着改变。

更新日期:2018-04-03
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