Dewald R R
Appl Microbiol. 1966 Jul;14(4):568-72. doi: 10.1128/am.14.4.568-572.1966.
Dried Serratia marcescens (ATTC strain 14041) cells were exposed to various partial pressures of oxygen and nitrogen. The colony-forming ability of the organisms was rapidly destroyed during exposure to oxygen but was unimpaired by exposure to purified nitrogen. The degree of inactivation depended upon temperature, time, and the partial pressure of oxygen, regardless of whether pure oxygen or dry air was used. The inactivation by oxygen followed the expression -1nN/N(0) = kO(2)t(1/2), where N(0) and N are the number of viable organisms before and after exposure respectively, [O(2)] is oxygen concentration, t is time, and k is the rate constant. At 25 C, k was 276 +/- 36 moles(-1/3) cc(1/2) hr(-1/3) for oxygen pressures between 5.5 and 258 torr. In the temperature range between -78 and 40 C, the rate constant may be expressed as k = 10(5.95+/-04.2) exp[(-430 +/- 26) cal/RT] moles(-1/3) cc(1/3) hr(-1/2).
将干燥的粘质沙雷氏菌（ATTC菌株14041）细胞暴露于不同的氧气和氮气分压下。在暴露于氧气期间，这些微生物的集落形成能力迅速被破坏，但暴露于纯氮气中则不受影响。失活程度取决于温度、时间和氧气分压，无论使用的是纯氧还是干燥空气。氧气导致的失活符合表达式-1nN/N(0) = kO(2)t(1/2)，其中N(0)和N分别是暴露前后存活微生物的数量，[O(2)]是氧气浓度，t是时间，k是速率常数。在25℃时，对于5.5至258托之间的氧气压力，k为276 +/- 36摩尔(-1/3) 立方厘米(1/2) 小时(-1/3)。在-78至40℃的温度范围内，速率常数可表示为k = 10(5.95+/-04.2) exp[(-430 +/- 26) 卡/RT] 摩尔(-1/3) 立方厘米(1/3) 小时(-1/2) 。
