In contrast, some aporphine alkaloids were converted into their protonated form under acidic conditions, resulting in decreased retention time on C18 column.
Higher flow rates decrease the retention time, but also increase the O2 mass transfer.
The decrease in retention time did not show significant influence on the performance data V x0, which was evaluated on each workday following the procedure described in [33].
We analyze this phenomenon for unfractured media and demonstrate that if hydrodynamic dispersivity is included, barometric pumping can significantly decrease the retention time of volatile subsurface contaminants.
As large sample volumes (up to 1000 µL) of real-world samples including waste and surface waters, some of which were untreated had to be injected in order to achieve the desired LOD and LOQ, it is to be expected that larger amounts of other matrix components, like non-polar organics, humic acids, or transition metals, were co-injected, leading to the decrease in retention time.
Furthermore, as the hydraulic conductivity of SRMs decreased, the retention time and the potential for oxygen reduction correspondingly increased, which affected the nitrogen transport and transformations in the lakeshore zone.
(a) Good data retention of >104 s with a good resistance ratio of >102 at 85°C under CC of 80 μA and (b) the resistance ratio gradually decreases with retention time at a low CC of 10 μA.
Decreasing the retention time in the biogas process for low solids streams by partly replacing continuous stirred tank reactors by high-rate bioreactors decreases the MBSP.
A steep gradient program appeared to be the only operational parameter that reliably decreased the retention time difference between the unlabeled and the d3-labeled hydrazones for the two late-eluting aldehydes (HNE and ONE) selected for our study.
Parameters other than ammonia [e.g. substrate change, increased loading rate and decreased hydraulic retention time (HRT)] apparently had an impact on the mechanism developed for methane formation in reactor DVX.
