lag phase


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Related to lag phase: Log phase

lag phase

[′lag ‚fāz]
(microbiology)
The period of physiological activity and diminished cell division following the addition of inoculum of bacteria to a new culture medium.
References in periodicals archive ?
Fe3+ can obviously improve the decolorization rate in the lag phase of bacteria reflected in bacterial growth curve.
The pulsatile-release pellets, DMPP-1-DMPP-5, showed 96.1%, 96.3%, 97.4%, 99.1%, and 99.5%, respectively, at the end of the 18th hour (with a 6-hr lag phase).
A lag phase, a log phase, and a stationary phase can be seen in both true-positive cultures.
A[beta] fibrillation process can be explained as in the following three phases: (1) a lag phase where A[beta] starts to change conformation and to form oligomers, (2) an elongation phase where A[beta] begins to fibrillation that drastically increases the ThT fluorescence, and (3) an equilibrium phase where the fibrillation process is completed.
perfringens SM101 at the early stage of incubation, as evidenced by the increase in the lag phase in the kinetics of growth; nisin had a greater effect (Supplementary Figure 2S).
where [log.sub.10], [N.sub.0], [mu], and t have the same meaning as in (1), abs and b have the same meaning as in (2), the subscript letters p and q have the same meaning as in (3), and A is the lag phase (h).
It was also noted that cell growth of propionic bacteria in conditions of 0.25 % m [v.sup.-1] of propionic acid showed a much greater lag phase ([t.sub.lag] = 55,5 hour) and a maximum specific growth rate ([[mu].sub.max]) much smaller (0.00277 [hour.sup.-1]) than in the other cultures with lower concentrations of propionic acid, especially in cultures with lactate broth alone, which had only 14 hour of lag phase and [[mu].sub.max] equal to 0.1137 [hour.sup.-1].
It must be noted that the C1Fd strain did not show a distinct lag phase when grown on both MAH compounds tested in this study.
(2010) found that this model tends to give slightly higher values without providing a biological explanation (negative lag phase) and Li et al.
From the observation, sample absorbed most at stationary phase followed by exponential phase and then lag phase at approximately similar region of wavelength.
This study reported that use of N-terminal truncated hamster rPrP (residues 90-231) substrate produced a shorter lag phase than the full-length hamster rPrP (residues 23-231), which is consistent with their previous report.
In liquid systems, the maximum specific growth rate remained unaffected by the preservatives, but the lag phase was longer in the system mimicking the fresh sausages.