Isah, A. A. and Mahat, N. A. and Jamalis, J. and Attan, N. and Zakaria, I. I. and Huyop, F. and Wahab, R. A. (2017) Synthesis of geranyl propionate in a solvent-free medium using Rhizomucor miehei lipase covalently immobilized on chitosan–graphene oxide beads. Preparative Biochemistry and Biotechnology, 4 (2). pp. 199-210. ISSN 1082-6068
Full text not available from this repository.
Official URL: http://dx.doi.org/10.1080/10826068.2016.1201681
Abstract
The chemical route of producing geranyl propionate involves the use of toxic chemicals, liberation of unwanted by-products as well as problematic separation process. In view of such problems, the use of Rhizomucor miehei lipase (RML) covalently bound onto activated chitosan–graphene oxide (RML-CS/GO) support is suggested. Following analyses using Fourier transform infrared spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, and thermogravimetry, properties of the RML-CS/GO were characterized. A response surface methodological approach using a 3-level-four-factor (incubation time, temperature, substrate molar ratio, and stirring rate) Box–Behnken design was used to optimize the experimental conditions to maximize the yield of geranyl propionate. Results revealed that 76 ± 0.02% of recovered protein had yielded 7.2 ± 0.04 mg g−1 and 211 ± 0.3% U g−1 of the maximum protein loading and esterification activity, respectively. The actual yield of geranyl propionate (49.46%) closely agreed with the predicted value (49.97%) under optimum reaction conditions (temperature: 37.67°C, incubation time: 10.20 hr, molar ratio (propionic acid:geraniol): 1:3.28, and stirring rate: 100.70 rpm) and hence, verifying the suitability of this approach. Since the method is performed under mild conditions, the RML-CS/GO biocatalyst may prove to be an environmentally benign alternative for producing satisfactory yield of geranyl propionate.
Item Type: | Article |
---|---|
Uncontrolled Keywords: | aromatic ester, Box-Behnken design, enzyme |
Subjects: | Q Science > QD Chemistry |
Divisions: | Science |
ID Code: | 80527 |
Deposited By: | Narimah Nawil |
Deposited On: | 22 May 2019 06:50 |
Last Modified: | 22 May 2019 06:50 |
Repository Staff Only: item control page