The phrase "a certain mixture of" is correct and usable in written English.
It can be used to describe a combination of different elements or qualities that are not precisely defined.
Example: "The dish had a certain mixture of spices that gave it a unique flavor."
Alternatives: "a specific blend of" or "a particular combination of".
But for a good part of the film she plays it that way quite shallow and hard not so much talking to people as lurking around interviewing them, with a certain mixture of warmth, condescension and reserve.When she falls in love, she has to lapse gradually into the ninny to behave as insufferably as the script requires her to.
The vision would be to see, whether a certain mixture of ethanol and the aqueous solution in the radiolabeling system would a) increase the labeling kinetics, b) lower the temperature required to achieve a given yield, and c) lower the amount of the ligand needed to achieve the maximum radiolabeling yields under fixed conditions.
Although the hazard index and related indices mentioned above are not suitable for giving information about the number of cases of impaired health to be expected for a certain complex exposure or policy scenario they represent an important tool for risk assessment and help to decide whether exposure of the population or subgroups to a certain mixture of chemicals should give rise to concern.
The summation of all TEQs in a certain mixture gives the total dioxin activity of this mixture.
A typical example is that certain mixtures of tree species increase the nutrient availability, nutrient uptake or nutrient use efficiency ((Rothe and Binkley [2001]); (Richards et al. [2010]); (Forrester [2014])).
Several data from neonatal studies disclose efficacy of certain mixtures of probiotics in preventing NEC, ameliorating feeding tolerance, and preventing gut fungal colonization.
This study identified certain mixtures of XYL, CEL, and FAE that increased 24-h DM disappearance of bahiagrass in the absence of rumen fluid.
In short, certain mixtures of these elements, right and left, are nearly irresistible parts of our total outlook on the universe, but unfortunately they seem to yield contradictions.
Tests for CYP induction, NADPH reductase activity and other CYP-dependent enzyme activity changes by certain mixtures of the pesticides showed no clear picture.
One of the most common methods for estimating the parameters of a distribution from data, the method of maximum likelihood (MLE), can break down in various cases, such as involving certain mixtures of continuous distributions.
The strong performance by certain mixtures of life-forms, especially tall forbs, grasses and succulents, warrants further investigation into niche complementarity or facilitation as mechanisms governing biodiversity-ecosystem functioning relationships in green roof ecosystems.
