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The phrase "active principle" is correct and usable in written English.
It is typically used in contexts related to pharmacology, herbal medicine, or chemistry to refer to the component of a substance that is responsible for its effects.
Example: "The active principle in this herbal remedy is known to enhance immune function."
Alternatives: "active ingredient" or "functional component".
Exact(60)
At the time of world-manifestation the active principle, rajas, becomes predominant and activates the other two principles.
Further pharmacological investigation and bioactivity guided studies are required to isolate the active principle (s) responsible for these activities.
Furthermore HPLC finger printing and compounds isolation was performed to identify the active principle compounds responsible for various pharmacological activities.
The nature of the active principle in the CWE causing anti-inflammatory activity has yet to be elucidated.
Further research is required to determine whether a single active principle is responsible for this dual in vitro activity.
However, further study is needed to isolate the active principle(s) in this plant which is responsible for this activity.
Mescaline was finally isolated as the active principle of peyote in 1896.
The critique affirms The Times's news department's commitment to vigorous, timely reporting and to fairness as an active principle.
"The Karmapa is the embodiment of the active principle of the Buddha," said one of those involved.
The active principle extracted from Plumbago roots, used in several medicinal drugs, is a yellow pigment called plumbagin.
Ergot is also the source of lysergic acid, the active principle of the psychedelic drug lysergic acid diethylamide (LSD).
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com