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问:在贵刊文章中,常见以D_(10)值作为杀菌指标,请问D_(10)值是什么意思?实际应用时如何计算? (河南读者原寒文) 答:在消毒学中,D_(10)值是指在某种消毒因子作用下,杀灭90％活存微生物个体或使活存微生物数降低到十分之一所需要的时间。在国外有关文献中,亦称之为DRT(decimal reduction time)。其度量衡单位多为min(分钟)。但在电离辐射灭菌中,D_(10)值则是指杀灭90％活存微生物个体所需要的辐射剂量,其度量衡单位为Mrad(百万拉德)或kGy(千戈瑞)。通常,可将D_(10)值简写为D值。同杀灭率等一样,D_(10)值亦是衡量消毒
Q: In your articles, the common D_ (10) value as a bactericidal indicator, what is the meaning of D_ (10) value? How to calculate the actual application? (Henan readers original text) A: In disinfection, D_ (10) Values refer to the time required to kill 90% of living microorganisms or to reduce the number of live microorganisms to one in ten under the action of some disinfectant. In foreign literature, also known as DRT (decimal reduction time). The unit of measure and more for min (minutes). In ionizing radiation sterilization, however, the value of D_ (10) refers to the dose of radiation needed to kill 90% of viable microorganisms, measured in units of Mrad or kGy. In general, D_ (10) values can be abbreviated to D values. As with the kill rate, D_ (10) value is also a measure of disinfection