Buscar
Mostrando ítems 41-50 de 278
Enzymatic Synthesis of Amorphous Calcium Phosphate−Chitosan Nanocomposites and Their Processing into Hierarchical Structures
(American Chemical Society, 2008-01)
Nanocomposites of amorphous calcium phosphate (ACP) nanoparticles embedded within chitosan (CHI) have been prepared through an enzymatically assisted route. Cryogenic processing (ISISA) of hydrogel nanocomposites has allowed ...
Application of chitosan coating on alginate beads for cryopreservation uses
(American Scientific Publishers, 2014-03-01)
Calcium alginate gel beads readily interchange solutes with the bulk solution and water with the surrounding media. The transfer properties are often critical for its use, either for its stability and preservation or ...
Immobilization of Carboxypeptidase A into Modified Chitosan Matrixes by Covalent Attachment
(Humana Press, 2018-08)
Carboxypeptidase A (CPA) is a metalloexopeptidase that catalyzes the hydrolysis of the peptide bonds that are adjacent to the C-terminal end of a polypeptide chain. The enzyme preferentially cleaves over C-terminal L-amino ...
On the Production of Chitosan-Coated Polycaprolactone Nanoparticles in a Confined Impinging Jet Reactor
(John Wiley & Sons Inc, 2018-04)
This work is focused on the synthesis of polycaprolactone nanoparticles, coated with chitosan, in a confined impinging jet reactor using the solvent displacement method. The role of the various reacting species was ...
Chitosan-bovine serum albumin complex formation: A model to design an enzyme isolation method by polyelectrolyte precipitation
(Elsevier Science, 2010-06)
Interactions between a model protein (bovine serum albumin-BSA) and the cationic polyelectrolyte, chitosan (Chi), have been characterized by turbidimetry, circular dichroism and fluorescence spectroscopy. It has been found ...
Development and Evaluation of Buccal Films Based on Chitosan for the Potential Treatment of Oral Candidiasis
(Springer, 2017-05)
In this work, chitosan films were prepared by a casting/solvent evaporation methodology using pectin or hydroxypropylmethyl cellulose to form polymeric matrices. Miconazole nitrate, as a model drug, was loaded into such ...
Highly efficient removal of heavy metals from waters by magnetic chitosan-based composite
(Springer, 2019-04)
Magnetic chitosan composite (MCC) made by chitosan matrix embedding magnetite/maghemite were developed for the removal of toxic Cu(II), Pb(II), and Ni(II) from water. Thermogravimetric (TGA) and Zeta potential analyses ...
Polyelectrolyte films based on chitosan/olive oil and reinforced with cellulose nanocrystals
(Elsevier, 2014-04)
Composite films designed as potentially edible food packaging were prepared by casting film-forming emulsions based on chitosan/glycerol/olive oil containing dispersed cellulose nanocrystals (CNs). The combined use of ...
Chemical improvement of chitosan-modified beads for the immobilization of Enterococcus faecium DBFIQ E36 l-arabinose isomerase through multipoint covalent attachment approach
(Springer Heidelberg, 2015-10)
d-tagatose is produced from d-galactose by the enzyme l-arabinose isomerase (L-AI) in a commercially viable bioprocess. An active and stable biocatalyst was obtained by modifying chitosan gel structure through reaction ...
Production and characterization of chitosan and glycerol-chitosan films
(Cambridge University Press, 2018-10)
This work presents the study of the isolation of chitin from residues of the Patagonian shrimp (Pleoticus muelleri), and its subsequent conversion to chitosan under different reaction conditions. The obtained products were ...