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Marker for detection of changes during

Chemical Markers for Early Detection of Chemical Changes during Tomato Processing... [Pg.33]

Contamination. Unlike the short-term experiments where contamination by other E. coli strains during the course of the experiment is obvious, E. coli contamination is of serious concern for these long-term experiments. Replacement of the culture by the contaminant will appear the same as an adaptive replacement. Strains should be tagged with various genetic markers so they can be distinguished from contaminants. These can be subtle changes such as electrophoretic variants and DNA sequence changes or more obvious ones such as resistance to certain antibiotics. Alternate chemostats should have strains that are marked differently so that cross-contamination can be detected. [Pg.630]

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Changes during

Of markers

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