The phrase "observed decreasing" is correct and usable in written English.
You can use it when referring to a decrease in observed or measured data. For example, "The research team observed decreasing temperatures throughout the study period."
The permeability was observed decreasing with depth of occurrence.
Also, in these cases, a reduction in time to diagnosis was observed, decreasing by between 20% and 50%.
For the pharmaceutical industry results are mixed: Some authors observed decreasing returns to R&D investments [47]-[49] [47]-[49]
As it can be observed, decreasing the amount of CO and H2 species will increase the overpotential of the cell in both operating regimes.
The observed decreasing τ values from 7.0 μs at 11 K to 0.6 μs at 80 K provide a clear evidence that non-radiative phenomena occur and quench the luminescence.
Nevertheless, the usually observed decreasing degradation rate with depth in sediments is not solely caused by the less efficient electron acceptors in the deeper layers, but rather by decreasing degradability of organic matter.[32].
Cardenas-Lailhacar and Dukes (2010) reported a highly significant correlation between θv measured by ECH2O-20 probe (an older version than ECH2O-5TE) and Watermark sensors but observed decreasing correlation with increasing irrigation frequency.
With increasing stratification levels, we simultaneously observed decreasing power and increasing type I error rates.
For two feature-dimensions (color and orientation), we observed decreasing RTs with increasing target saliency.
With increasing concentrations of TSA in the food during larval development, we observed decreasing severity of the wing blistering.
Contrary to the hypothesized effect of risk elevation in the socially deprived, we observed decreasing rates of ED/OC utilization for influenza with increasing social deprivation.
