The phrase "issues with concentration" is correct and commonly used in written English
It refers to difficulty in focusing or paying attention. Example: "John's grades have been dropping because he has been experiencing issues with concentration in class."
Moreover, parabens, triclosan, and other preservatives have environmental bioaccumulation issues, with concentrations of these chemicals detected in aquatic life, leading to a call for safer alternatives.
These factors could be expected to lead to reports of issues with fatigue, concentration, comprehension, memory or reading speed that would be unrelated to visual problems.
Harrington played down issues with the team's concentration and his own demotion and said he would focus on being "the best bench player".
The multiple daily dosing not only has the issues with fluctuation of plasma drug concentration but may also lead to poor patients' adherence.
PDMS stability and contamination issues with respect to pH, H2S concentration and variable salinity in experimental hydrothermal solutions have been studied elsewhere [13], however results are re-presented here.
In addition, they also sustain important neuropsychological issues including depression, anxiety, memory loss, and difficulty with concentration [ 6, 8- 19].
We surmise that this might be because of the relatively low B[a]P concentrations and issues with the limit of detection in the chemical analysis obscuring any trend, but have no data on which to test this.
Calcium sulfate scaling is a known issue with drainage water concentration systems.
They're in brawl with China today, they're in brawl with the U.S. government over privacy issues and concentration of power issues and copyright issues.
Ratios below 1/125 are not recommended because of poorer reproducibility (substrate heterogeneity, weighing errors), as well as issues with the detection of low Pb concentrations during subsequent analysis.
