The phrase "a specific substance in" is correct and usable in written English.
It can be used when referring to a particular material or chemical within a larger context, such as in scientific or technical writing.
Example: "The study focused on a specific substance in the formulation that enhanced its effectiveness."
Alternatives: "a particular material in" or "a distinct compound in".
One hypothesis is that a specific substance in the body (hypocretin/orexin) has a hand in stabilizing wakefulness and sleep transitions, appetite, and satiety (the feeling of fullness).
PET scans inject a radioactive tracer into an individual which is designed to bind to a specific substance in the body.
Finally, intention is often assessed as the motivation or readiness to start using a specific substance in the future (e.g., [ 26]).
If a specific substance is degraded in dependency on the SRT, a critical value for the sludge age can be determined.
Although biases in the propensity to forage for a specific substance have been found (reviewed in Calderone and Page 1991; Page and Robinson 1991; Beshers and Fewell 2001) and most bees specialize on either pollen or nectar on a given trip (Seeley 1985 , 1995, over the course of their foraging career, most bees appear to be generalists (Seeley and Towne 1992).
Often, the extrinsic interpretation is referred to by the word "represents": for example, we say that a variable x represents the concentration of a specific substance and that the oscillation shown in simulations represents variations in concentrations during the cell cycle.
Thus, the interaction between these strains is unlikely due to the expression of a specific substance, as is the case in quorum sensing [29], but is more likely due to a global change of the composition of multiple substances [30], [31].
This code would be the equivalent of an IUPAC systematic name and would be designed to provide information about the specific substance in question.
Different types of testicular cancer are associated with an increase in specific substances in the blood, including alpha fetoprotein, human chorionic gonadotropin, and lactate dehydrogenase.
They say requiring minimum levels of specific substances in order to label a drink "Absinthe" would undermine traditional methods of production.
In the few last years, the need of reliable, fast and inexpensive methods for selective analysis of specific substances in complex mixtures has grown exponentially.
