New types of Cu-doped spherical-shaped activated carbons were prepared by pyrolysis at 700 °C chitosan hydrogels impregnated with KOH ratios (mKOH/mchitosan) ranging from 22.5% to 135%. At impregnation ratio lower than 63%, the precursor Cu doping allowed obtaining bead-shaped (diameter ~ 2 mm) and highest specific surface areas (1145 m2 g?1). The absence copper yielded carbon powders whatever ...

Lipases from Geotrichum candidum 4013 (extracellular lipase and cell-bound lipase) were immobilized by adsorption on chitosan beads. The enzyme preparations were tested in the synthesis of ester prodrugs from racemic 9-(2,3-dihydroxypropyl)adenine in dimethylformamide with different vinyl esters (acetate, butyrate, decanoate, laurate, palmitate). The transesterification activities of these immo...

Although pellet culture and encapsulation of chondrocytes into gel-like biomaterials have lead to major advances in cartilage tissue engineering, a quantitative comparative characterization of cellular differentiation behavior during those cultivation procedures has not yet been performed. Our study therefore aimed at answering the following question: is the redifferentiation pathway of chondro...

The objective of this study was to evaluate the immobilization of lipase on a chitosan support by physical adsorption, aiming at its application in hydrolytic and synthetic reactions. Two types of chitosan (flakes and porous) were used for immobilizing lipase from a microbial source (Candida rugosa) and animal cells (porcine pancreas). The best results for recovery of total activity after immob...

Ruan, C.-Q. 2017. Functionalization, Characterization and Applications of Oxidized Nanocellulose Derivatives. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1548. 68 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-513-0048-1. Cellulose, a sustainable raw material derived from nature, can be used for various applications following its...