Isomerization of aldoses to ketoses is an essential step in carbohydrate valorization routes biorefineries produce a wide variety bioproducts. In this work, selective isomerization into was investigated using different commercial Brønsted basic anion resins at low temperature conditions. Weak and strong were tested under reaction Amberlite IRA-900 Amberlyst A-26 (strong resins) IRA-67 A-21 (wea...

Screening tests of different marine algae biomas types revealed a high passive biosorptive uptake of lead up to 270 mg Pb/g of biomass in some brown marine algae. Members of the order Fucales perfomed particularly well in this descending sequence: Fucus > Ascophyllum > Sargassum. Although decreasing the swelling of wetted biomass particles, their reinforcement by crosslinking may significantly ...

BACKGROUND Shikimic acid, the sole chemical building block for the antiviral drug oseltamivir (Tamiflu®), is one of the potent pharmaceutical intermediates with three chiral centers. Here we report a metabolically engineered recombinant Bacillus megaterium strain with aroE (shikimate dehydrogenase) overexpression for the production of shikimic acid. RESULTS In a 7 L bioreactor, 4.2 g/L shikim...

A method for the preconcentration of Cu, Fe, Pb, Ni, Cd and Bi as their diethyldithiocarbamate chelates was proposed using a column filled with Amberlite XAD-4 resin. The retained analytes on the resin were recovered with a small volume of acetone. The metal ions in the effluent were determined by a flame atomic absorption spectrometer. Different factors including pH of sample solution, sample ...