The phrase "additional concentration" is correct and usable in written English.
It can be used when referring to an extra level of focus or attention required for a task or subject.
Example: "To improve your performance, you may need to apply additional concentration during your studies."
Alternatives: "extra focus" or "increased attention".
In the 20th century there was additional concentration of population in the city of Barcelona and its satellite towns.
I am able to finish next month, but in light of what I have read about the new income-based repayment guidelines I may pursue an additional concentration in spring 2012 in order to be sure I qualify for the 10 percent/20-year (10/20) plan.
Three additional concentration levels were then added to the model to establish linearity, repeatability and sensitivity.
An additional concentration improvement can be achieved by introducing the multiwindow S-method [51].
Pressure exerted by the drilling fluid (mud) instigates an additional concentration of stresses in the surroundings of the wellbore.
However, additional concentration is due to repeated victimization of a minority of victims after the first victimization.
Three additional concentrations (200, 300 and 400 mg/ml) were used in addition to that used for the toxicology testing (500 mg/ml).
'On the plus side I've got a bust and my hair and nails are much stronger and longer than they were before.' Because Natural Push-Up is classified as a herbal remedy, no clinical trials have been conducted to examine the long-term side effects of taking additional concentrations of oestrogen into the body.
We tested additional concentrations between 50 to 100 μg/ml.
We have observed that the same additional concentrations of nano-ZnO at the same size showed different results in L02 and HEK293 [10].
To do this we immersed seedlings in five different concentrations of H2S (68 μM, 204 μM, 680 μM, 2.04 mM and 6.8 mM) in 2010, and three additional concentrations (400 μM, 500 μM and 800 μM) in 2011.
