Effect of optimization on spectrum quality and reproducibility.

aValues reported are the means of 20 replicates ± the standard deviations of the mean. Data were analyzed by t test (α = 0.05). bValues reported are the average correlation coefficients of 20 replicates ± the standard deviations of the correlation coefficient. Before and after optimization values for each bacterium followed by different numbers of asterisks are significantly different.a. 报告的数值为20次重复实验的平均值±平均值的标准差。数据采用t检验进行分析（显著性水平α=0.05）。 b. 报告的数值为20次重复实验的平均相关系数±相关系数的标准差。 标注有不同数量星号的各菌株优化前后的数值，差异具有统计学显著性。