If persistent trace organics are present in recycled waters at concentrations in excess of their intended use, natural attenuation during aquifer passage alone may not result in extracted water meeting regulatory requirements.
There was something about them — paintings of hunters and animals, real and mythological — that struck him as both "mysterious" and "persistent," creating lasting traces of "people who had been forced out of the land".
(ii) This accumulation takes place on several timescales, such that prolonged dominance (e.g. during intermittent presentation) leaves a persistent biasing trace, whereas brief dominance (e.g. just before the end of a continuous presentation period) leaves a more transient trace.
The persistent appetitive trace in the horizontal DPM branch/lobes coincides with the innervation of the positively reinforcing dopamine neurons [56,90] and it is plausible that these and other dopamine neurons control the consolidation process [115,116].
The D1 receptor is critical for the induction of Zif268 and arc, proteins required for the transition of E-LTP into L-LTP and memory consolidation in mammals (Granado et al. 2008), and the activation of D1/D5 receptors is required during memory encoding to generate a persistent memory trace in the hippocampus (O'Carroll et al. 2006).
Fluorescence increase of two standard deviations above initial fluorescence was scored as fusion event in panels C and E. After this increase, fluorescence may remain high (left trace, persistent event) or may decay (middle and right trace, transient events).
In a significant proportion of celiac patients, an abnormal small bowel morphology persists despite a GFD, probably because of the persistent ingestion of trace amounts of gluten.
The typical example traces show persistent and transient fusion events.
If the last residual traces are persistent, you may need to blot several times.
Some of the politicized debate about counterterrorism policy in the United States can be traced to persistent confusion about what Al Qaeda actually is, and therefore, what character of threat it presents at a given time.
