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THE AGAR DIFFUSION ASSAY
TUBE ASSAYS FOR GROWTHPROMOTING
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absorbance activity agar antibiotic antilog applied assay assay design balanced biological calculation Chapter column components concentration confidence limits convenient correction corresponding curvature curve degrees of freedom described determined deviation diffusion dilutions dose levels dose-response effect error estimate evaluation Example expressed factor follows four give given graph growth illustrated increase individual influence IU/mg IU/ml laboratories leads less log dose logarithm material mean mean responses mean squares measured medium method modified nominal normal observations obtained parallel plate plotted possible potency estimate potency ratio practical precision preparation principles procedure random reference regression relationship relative replication represents response lines routine sample sample potency seen shown simple slope ratio sources squares standard statistical streptomycin substances Table test organism test solution transformation treatment tubes units variation versus weight zero dose zone