The BAS effect in all references I could find it was Biologically Active Substance, didn’t matter if the subject was food-science, water processing, ethnobotany or something fourth. The references don’t give a much of a clue by titles either as they reference a book chapter and an article, one on preservatives and one on hydrocolloids, respectively.
The article
@maria mentioned also states:
In combination with hyaluronic acid and plant extracts, the polymer ensures deep and efficient cleaning of skin, toning, and waste removal and affects the intensity and duration of BAS effect.
Which goes well with the
mention of both the micellar formation of low-concentration some copolymers along with delayed-release drug delivery in regard to block polymers. (
http://dx.doi.org/10.1039/B208503H).
With that said, someone should tell the authors that is it is poor style to write an article without adding a list of abbreviations!