FTIR, SEM and fractal dimension characterization of lipase B from Candida antarctica immobilized onto titania at selected conditions

Production of flavor esters catalyzed by lipase B from Candida antarctica immobilized on magnetic nanoparticles

“…2 (b) shows the spectrum of the functionalized Fe 3 O 4 with APTES. The covalent anchoring can be confirmed by the bands at 3427 and 1630 cm -1 , assigned to N-H and NH 2 stretching, respectively (Foresti et al, 2010). Bands related to Si-O groups were observed at 1116 (Si-O-Si) and 894 (Si-OH) cm -1 .…”

“…2 (c), confirming the introduction of the lipases. A band in the range of 1700-1600 cm -1 was related to amide I (A-I) vibration, while a signal of lower intensity observed at 1541 cm -1 was assigned to symmetrical bending of the N-H bonds, confirming amide II (A-II) vibration (Foresti et al, 2010). Bands observed around 1220-1330 cm -1 were attributed to Amide III (A-III) region.…”

Towards a green enantiomeric esterification of R/S-ketoprofen: A theoretical and experimental investigation

“…The contribution of the ␤-sheet structure was obtained by adding the area of the signals appearing at 1631 cm −1 , 1637 cm −1 and 1686 cm −1 wavenumbers. Similarly, the contribution of the ␤-turn structure corresponded to the addition of the areas of the signals located at 1664 cm −1 , 1666 cm −1 and 1676 cm −1 [29,[43][44][45][46]. Finally, a signal at 1619 cm −1 corresponds to ␤ aggregates.…”

About the role of typical spacer/crosslinker on the design of efficient magnetic biocatalysts based on nanosized magnetite

“…Organic polymers like Nylon, agarose, or polymethacrylate; and inorganic compounds such as carbon, gold particles, or titanium oxide have been used as enzyme supports [2][3][4][5][6][7]. All these materials required filtration or centrifugation to recover and wash the biocatalyst after its utilization.…”