However, P NMR spectroscopy continued to demonstrate acceptably low levels of amidate contamination after each cycle.
After removal of 60-cycle contamination and other artifacts that occur because of external noise, the data were signal-averaged.
It should be noted though that even when using only 20 PCR cycles contamination was still predominant with the lowest input biomass [see Additional file 1: Figure S1].
"There is a vicious cycle of contamination.
In order to improve understanding of the local water cycle and contamination dynamics in the aquifer beneath the city, a down gradient spring and an observation well were chosen to identify contaminant occurrence and loads.
Once the adult worm makes contact with the water, however, thousands of larvae are expelled, perpetuating the cycle of contamination.
Before cDNA synthesis, RNA was treated with DNAse I (Roche) and checked for residual DNA contamination with a 55 cycle PCR.
Now we are uncertain whether the observed high frequency peak is real at a periodicity 1.2 weeks or it is a contamination from the daily cycle at 1/7 weeks.
In addition to smaller CLs in the first postpartum estrous cycle, bacterial contamination of the postpartum uterus has also been shown to be associated with lower plasma P4 concentrations [ 8].
Cultivation of mushrooms generates a large amount of spent mushroom compost (SMC) that must be rapidly discarded by the grower to avoid the contamination of new cultivation cycles and infestation by flies or other insects (Marques et al. 2014).
