Electronic Journal of Biotechnology ISSN: 0717-3458
  © 2008 by Universidad Católica de Valparaíso -- Chile
Vol. 11 No. 1, Issue of January 15, 2008
 


Table 3. Enantiomeric excess of the substrate at 48 hrs revealing little effect from initial ibuprofen concentration, but influences of both water activity and solvent.


Ibuprofen Concentration

60 mM

48 mM

36 mM

24 mM

 Isooctane

aw = 0.73

0.442 ± 0.0127

0.402 ± 0.0126

0.419 ± 0.0053

0.462 ± 0.0074

aw = 0.59

0.343 ± 0.0101

0.330 ± 0.0088

0.313 ± 0.0019

0.303 ± 0.0093

aw = 0.43

0.0852 ± 0.0001

0.0783 ± 0.0061

0.0818 ± 0.0001

0.0907 ± 0.0045

 2,5-Dimethylhexane

aw = 0.73

0.247 ± 0.0078

0.201 ± 0.0029

0.161 ± 0.0067

ND

aw = 0.59

0.118 ± 0.0056

0.104 ± 0.0011

0.0836 ± 0.0046

ND

aw = 0.43

NR

NR

NR

ND

 2-Methylheptane

aw = 0.73

0.396 ± 0.0023

0.385 ± 0.0045

0.380 ± 0.0056

0.378 ± 0.0011

aw = 0.59

0.361 ± 0.0010

0.318 ± 0.0026

0.303 ± 0.0070

0.286 ± 0.0064

aw = 0.43

0.042 ± 0.0022

0.068 ± 0.0077

0.028 ± 0.0017

NR

 n-Octane

aw = 0.73

0.300 ± 0.0065

0.279 ± 0.0001

0.250 ± 0.0065

0.300 ± 0.0040

aw = 0.59

0.215 ± 0.0022

0.224 ± 0.0071

0.182 ± 0.0011

0.185 ± 0.0042

aw = 0.43

0.014 ± 0.0003

0.026 ± 0.0067

0.037 ± 0.0093

0.037 ± 0.0007

ND: indicates the reaction was not performed.
NR: indicates no reaction was observed.


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