In this paper, we improve upon the discontinuous Galerkin (DG) method for HamiltonJacobi (HJ) equation with convex Hamiltonians in [5] and develop a new DG method for directly solving the general HJ equations. The new method avoids the reconstruction of the solution across elements by utilizing the Roe speed at the cell interface. Besides, we propose an entropy fix by adding penalty terms propo...

this paper describes optimization method that combines the plackett-burman design, a factorial design and the response surface method, which were used to optimize the medium for the production of l-asparaginase by serratia marcescens sb08. four medium factors, from out of 11 medium factors, were screened by plackett-burman design experiments and subsequent optimization process to find out the o...

Article history: Received 18 July 2013 Received in revised form 30 December 2013 Accepted 3 January 2014 Available online 8 January 2014

The present investigation deals with the development of a convenient method for the isolation of alanine and proline from protein hydrolysates. In this work the authors aim to eliminate some of the objections inherent in the older methods (l-6). No expensive reagents are required for the separation of these amino acids, and high yields of the pure final products are secured. In a recent publica...