Following monomer dissolving, 0.7 [cm.sup.3] of the trifluoromethanesulfonic acid was added to reaction mixture which was kept at room temperature for 3 h.
Cationic polymerization of poly(L-lactide) with trifluoromethanesulfonic acid as catalyst provides regular polymer structure which has strong influence on the increasing glass transition temperature, Fig.
Taking into account the difference in [T.sub.c] and [delta][H.sub.c], for the samples synthesized according to insertion (with tin(II)) 2-ethylhexanoate as catalyst) and to the activation monomer mechanism (with trifluoromethanesulfonic acid as catalyst), it can be concluded that cationic polymerization mechanism results in more ordered polymer structure, in comparison to the insertion mechanism.
We found that treatment with trifluoromethanesulfonic acid (chemical deglycosylation), while altering slightly the elution characteristics of circulating NT-proBNP, did not make the chromatographic profile of circulating immunoreactive NT-proBNP any less heterogeneous.
Deglycosylation of glycoproteins by trifluoromethanesulfonic acid. Anal Biochem 1981; 118:131-7.