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These two impurities were originally associated with the Leuckart method in the 1970's (by Barron et al., and Kram and Kreugal), but it was not possible at that time to preclude them from being formed by other synthetic methods.
The study by Duffy and Parmar represents a major advance because it calculates the length of follow-up time necessary to preclude any overestimation of overdiagnosis [ 1].
Furthermore, a short treatment time was chosen to preclude secondary effects.
This waiting time is meant to preclude any possibility of spontaneous return of circulation and to allow death to be pronounced with confidence [ 1, 2].
Thus, despite advances in early detection of major forms of human cancer (prostate, breast, lung, colon, leukemia, lymphoma), more often than not, cancers have developed to a sufficiently late stage at the time of detection to preclude most opportunities for curative therapy [ 1, 3].
If the aim is to maximize the productivity of the digester system, or variations of the input and loading rate occur, process indicators will have to be measured in due time or at best online to preclude destabilization.
To avoid the occurrence of redundant MS/MS measurements, real-time dynamic exclusion was enabled to preclude re-selection of previously analyzed precursor ions, using the following parameters: repeat count 2, repeat duration 30 s, exclusion list size 500, exclusion duration 180 s, and exclusion width 0.1 m/z unit.
It saves time to help people preclude proteins that have no expression or low expression level.
Although several parameters, such as variable run conditions and times, likely preclude application to outbreak events in real time, the revised scheme presented here may be useful for retrospective epidemiologic investigations in which a more specific focus is often placed on a limited number of epidemiologically related isolates (15 ).
What's a President to do in cases where time constraints preclude the kind of careful postwar planning that is crucial in executing any war?
