We occasionally saw trace amounts of DSQ in extracts from an E. coli hpn(C+D) clone, which we attributed to decomposition of HSQ.
The paintings of Dan Christensen, who lives in Springs, fall into this category, often consisting of little more than bloblike shapes floating on a monochromatic ground, occasionally with traces of underpainting rising up from below the surface.
Evidence is to be seen in the once thriving ports around the shores of the Mediterranean that now are not merely silent ruins but seem so far from even sight of the sea that it is difficult to imagine the presence of seagoing ships at the wharves, the alignment of which can occasionally be traced in the fertile alluvial land now occupying the site.
While today's 42nd Street still occasionally betrays traces of the golden era of Broadway, as well as the days when it was lined with B-movie theaters, some things -- like roof gardens on theaters and lobster palaces, those lavish after-theater hangouts like Murray's Roman Gardens and Rector's where the extravagant décor was as memorable as the food -- have been lost to history.
And if he occasionally stops to trace equations in the sand, she leaves him be.
Although many healthy pregnant women occasionally show a trace of protein (albumin) in their urine, the detection of even small amounts of protein in the urine is a cause for alertness on the part of a physician, because anything more than an extremely small amount may be the first signal of impending preeclampsia or kidney disease, both of which are serious complications.
Occasionally, we hear traces of wry humor in Fran's speech.
The prehistoric impact of people on the Arctic landscape has occasionally left visible traces, such as house and field structures.
Sewage sludge occasionally even contains traces of endocrine disruptors and other harmful organic substances or their metabolites which finally led to the ban of application of sewage sludge as a fertiliser in Germany within the next 10 years.
DOI: http://dx.doi.org/10.7554/eLife.05413.011 Close inspection of the time traces occasionally revealed what appeared to be small backwards movements of the attached head, such as the transition starting at 480 ms in the trace of Figure 1A.
