Biotechnology and bioengineering, 91(2), 227-236 (2005-05-26)
The activity of penicillin acylase has been studied in aqueous and organic solvents, as free enzyme as well as immobilized within the membrane of liquid-core capsules. The activity of the enzyme is inhibited by the accumulation of the products of
International journal of pharmaceutics, 188(2), 203-219 (1999-10-16)
The surface free energy parameters of ethylcellulose (EC) films were determined using the Lifshitz-van der Waals/acid-base approach and the influence of plasticizers on their surface energetics was assessed. Films were prepared by dip-coating glass slides in organic solvents containing EC
Biotechnology and bioengineering, 82(1), 103-110 (2003-02-06)
The bioconversion of L-phenylalanine to 2-phenylethanol by Saccharomyces cerevisiae in fed-batch experiments has shown that concentrations of 2-phenylethanol of >2.9 g/L have a negative impact on the oxidative capacity of the yeast. Without tight control on ethanol production, and hence
Journal of controlled release : official journal of the Controlled Release Society, 89(1), 5-18 (2003-04-16)
A controlled porosity osmotic pump-based drug delivery system has been described in this study. Unlike the elementary osmotic pump (EOP) which consists of an osmotic core with the drug surrounded by a semipermeable membrane drilled with a delivery orifice, controlled
European journal of pharmaceutics and biopharmaceutics : official journal of Arbeitsgemeinschaft fur Pharmazeutische Verfahrenstechnik e.V, 47(1), 27-32 (1999-05-11)
The release of the hydrophilic etofylline and the lipophilic propyphenazone (octanol/water partition coefficient PC = 0.35 and 119, respectively) from diffusion pellets coated with the aqueous ethyl cellulose dispersion Aquacoat ECD-30 and 20% dibutyl sebacate (DBS) as plasticizer is investigated
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