The enzyme exchanging formate with the carboxyl of pyruvate was purified 195-fold from extracts of Streptococcus fuecalis by a procedure involving protamine treatment, dialysis, and gradient centrifugation. Centrifugation of protamine-treated extract in a 10 to 40% potassium tartrate gradient provided a 65-fold purhication and separated the exchange enzyme from pyruvate decarboxylase, acetolact...

Giardiasis is an important human parasitic disease. Giardia is a genus composed of binuclear flagellate protozoa. Giardia duodenalis is a parasitic species for a wide range of vertebrates, including humans. Heterogeneity in G. duodenalis has been shown by serological, biochemical, and molecular analysis. In the present study, the possible genetic similarity between Giardia in sheep and humansan...

In this article a preconditioned version of the Delayed Weighted Gradient Method (DWGM) is presented and analyzed. addition to convergence, some nice properties as A- orthogonality current transformed gradient with all previous vectors well finite convergence are demonstrated. Numerical experimentation also offered, exposing benefits preconditioning.

The Discontinuous Petrov-Galerkin (DPG) method for high frequency wave propagation problems is discussed. The DPG method offers uniform pre-asymptotic stability for any wavenumber. This allows for a fully automatic adaptive hp algorithm, that can start from very coarse meshes. Moreover DPG always delivers a Hermitian positive definite system, suggesting the use of the Conjugate Gradient algorit...