21 research outputs found
Study and suppression of the microstructural anisotropy generated during the consolidation of a carbonyl iron powder by field-assisted hot pressing
Published OnlineA spherical carbonyl iron powder was consolidated by the field-assisted hot pressing technique using graphite tools at two different temperatures, both above the austenitizing temperature. The microstructures obtained exhibited a compositional gradient in carbon along the consolidated material. Thus, the outer rim of the cylindrical samples was composed of cementite and pearlite that gradually turned to pearlite, leading to a fully ferritic microstructure at the core of the sample. The increase in the temperature has led to a higher introduction of carbon within the sample. The interposition of a thin tungsten foil between the graphite die/punches and the powders has significantly reduced the diffusion of the carbon through the iron matrix and has suppressed the microstructural anisotropy.Publicad
One-pot tandem enzymatic reactions for efficient biocatalytic synthesis of d-fructose-6-phosphate and analogues.
International audienc
Synthesis, physicochemical characterization and biological evaluation of chitosan sulfate as heparan sulfate mimics
Despite the relevant biological functions of heparan sulfate (HS) glycosaminoglycans, their limited availability and the chemical heterogeneity from natural sources hamper their use for biomedical applications. Chitosan sulfates (ChS) exhibit structural similarity to HSs and may mimic their biological functions. We prepared a variety of ChS with different degree of sulfation to evaluate their ability to mimic HS in protein binding and to promote neural cell division and differentiation. The structure of the products was characterized using various spectroscopic and analytical methods. The study of their interaction with different growth factors showed that ChS bound to the proteins similarly or even better than heparin. In cell cultures, a transition effect on cell number was observed as a function of ChS concentration. Differences in promoting the expression of the differentiation markers were also found depending on the degree of sulfation and modification in the chitosan.The authors gratefully acknowledge financial support provided by
the Spanish Ministerio de EconomĂa y Competitividad (Grants
MAT2015-65184-C2-1-R and MAT2015-65184-C2-2-R).Peer Reviewe
On the Role of Alloy Composition and Sintering Parameters in the Bimodal Grain Size Distribution and Mechanical Properties of ODS Ferritic Steels
Microstructural and mechanical characterisation of ODS ferritic alloys produced by mechanical alloying and spark plasma sintering
International audienc
Microstructural and mechanical characterisation of ODS ferritic alloys produced by mechanical alloying and spark plasma sintering
Tandem and Sequential Multi-Enzymatic Syntheses
Summary
This chapter contains sections titled:
âąProduction of Isorhamnetin 3-O-Glucoside in Escherichia coli Using Engineered Glycosyltransferase
âąMultienzymatic Preparation of (â)-3-(Oxiran-2-yl)Benzoic Acid
âąEnzymatic Synthesis of Carbohydrates from Dihydroxyacetone and Aldehydes by a One Pot Enzyme Cascade Reaction
âąAldolase Based Multi-Enzyme System for Carbon[BOND]Carbon Bond Formation
âąTandem Biocatalytic Process for the Kinetic Resolution of ÎČ-Phenylalanine and its Analogs
âąA Chemoenzymatic Synthesis of a Deoxy Sugar Ester of N-Boc-Protected L-Tyrosine
âąElectrochemical Systems for the Recovery of Succinic Acid from FermentationsPeer reviewe