The phrase "a concentration frequently" is not correct and does not convey a clear meaning in written English.
It may be intended to describe a common occurrence of concentration, but the phrasing is awkward and lacks clarity.
Example: "A concentration frequently observed in this study is the focus on environmental factors."
Alternatives: "a frequent concentration" or "a common focus".
The pay, ten shillings a week, was attractive, but office life was not; he lacked concentration, frequently posting documents to the wrong people as well as engaging in pranks that alarmed his superiors.
Concentration frequently fails.
High stiffness areas due to the stress concentration frequently develop in the near field beneath the transducer including the superficial aspect of some thyroid nodules, as well as at boundaries of tissues with contrasting stiffness including the margins of some nodules.
Low serum sodium concentration frequently appeared on cirrhosis patients with ascites [ 34].
In practice, the use of the first-order approach to predict plasma concentrations frequently yields a mismatch between predicted and measured plasma concentration versus time profiles (Weiss, 1996; Higaki et al., 2001; Ring, 2001).
The results also show that histamine, at concentrations below the legal limit, increases the cytotoxicity of tyramine at concentrations frequently reached in some foods.
At higher external concentrations, frequently detrimental effects on plant growth are observed, while lower levels of carbon nanomaterials (<100 mg L−1) exert beneficial or no effects; 4.
On the other hand, in studies aiming at the development of agricultural or biotechnological CNM applications, substantially higher concentrations frequently need to be investigated according to the envisaged product design.
In intensive care units (ICUs) worldwide it has become standard practice - also for nondiabetic patients - to measure blood glucose concentrations frequently (mostly using measurement intervals of 2-3 hours for nondiabetics) and to administer insulin by infusion or injection if the patient is hyperglycemic (>7-8 mmol/l) [5].
Estrogens are potent endocrine disruptors at concentrations frequently observed in surface waters.
Stream pharmaceutical concentrations frequently exceeded 1 μg/L in samples collected downstream from the NY2 discharge (Supporting Information Figure S-3).
