The phrase "add concentrations" is correct and usable in written English.
It can be used in contexts where you are instructing someone to include or increase the levels of certain substances or elements in a mixture or solution.
Example: "To enhance the flavor of the dish, you may want to add concentrations of various spices."
Alternatives: "increase levels" or "include amounts".
The diurnal fluctuation pattern showed that P4, testosterone, and ADD concentrations in the rumen were greater at nighttime than daytime and peaked 6 h after feeding in the morning or afternoon.
Ruminal P4, testosterone, and ADD concentrations of lactating dairy cows were greater in the TMR with forage combination of corn silage plus alfalfa hay or Chinese wild ryegrass hay than the TMR with the corn stover-based forage combination.
Five Holstein lactating dairy cows fed 5 total mixed rations (TMR) with different forage combinations were used in a 5 × 5 Latin square design to investigate diurnal variations of progesterone (P4), testosterone, and androsta-1,4-diene-3,17-dione (ADD) concentrations in the rumen.
ADD concentrations were consistently lower than those of AED, except at day 8, when the mean was maximal at 5.2 ± 0.5 μM.
d In different adding concentrations of n-dodecane and silicone oil.
The accuracy of the proposed method was evaluated by the recovery studies for added concentrations.
Finally, actual suspended NPs concentrations should be used instead of initially added concentrations whenever possible in nanotoxicity studies.
This implies that gel particles of higher charge density were favorable to offer higher refolding yield at lower added concentrations.
Samples with perchlorate concentrations below 1.5 µg/L were spiked resulting in added concentrations of 1.5 and 3 µg/L of perchlorate, respectively.
We added concentrations of the four THMs to get TTHM concentrations, using imputed concentrations of the individual THMs for nondetects.
The calculated MMC concentrations depended linearly on the added concentrations as expected (data not shown), but required a calibration factor.
