The phrase "active principles of the" is correct and usable in written English.
It can be used in contexts discussing the essential components or elements of a substance, particularly in fields like pharmacology or herbal medicine.
Example: "The active principles of the herbal extract are responsible for its therapeutic effects."
Alternatives: "active compounds of the" or "active ingredients of the".
Alkaloids were proposed as active principles of the plant that possessed antibacterial activity on S. aureus S. epidermidis Streptococcus faecalis B. subtilis Escherichia coli, and Pseudomonas aeruginosa[ 27- 29].
The active principles of the hop also help prevent spoilage by retarding the growth of bacteria in the beer.
During the first two decades of the century, steady progress was made in the isolation, identification, and study of the active principles of the various endocrine glands, but the outstanding event of the early years was the discovery of insulin.
And he criticizes the Epicureans and the Stoics, who postulate either matter (the atoms) or god respectively as active principles of the world (De Iside 369A).
A similar result was obtained by a recent study in Vietnam, where it was suggested that differences between qualitative and quantitative usage could be explained by differences in the doses and concentration of active principles of the different drugs (Carrique-Mas et al. 2015).
In previous studies the active principles of the willow leaf extracts (Salicin and Saliginin chemicals related to salicylic acid) were shown to be anti-leukemia agents [13].
"The Karmapa is the embodiment of the active principle of the Buddha," said one of those involved.
Ergot is also the source of lysergic acid, the active principle of the psychedelic drug lysergic acid diethylamide (LSD).
The active principle of the vaccine, known as an antigen, is the bit of the pathogen that the immune system recognises and that the antibody sticks on.
In recent years reserpine, the active principle of the Chinese plant Rauwolfia, has been isolated; it is now effectively used in the treatment of high blood pressure and some emotional and mental conditions.
Artemisinin (ARS) also known as qinhaosu, is the active principle of the Chinese plant Artemisia annua L. (qinhao) used for more than 2000 years in Traditional Chinese Medicine (TCM) as a remedy to treat fever and chills caused by malaria infections [5].
