نتایج جستجو برای: chitosan oligomers

تعداد نتایج: 26698  

2015
Chelsea L. Bueter Chelsea Linnay Bueter Christopher M. Sassetti Jennifer P. Wang Christopher Sassetti Jennifer Wang Jatin Vyas

Chitin is an abundant polysaccharide found in fungal cell walls, crustacean shells, and insect exoskeletons. The immunological properties of both chitin and its deacetylated derivative chitosan are of relevance due to frequent natural exposure and their increasing use in translational applications. Depending on the preparation studied and the endpoint measured, these compounds have been reporte...

2004
Nan Li

In this study, we examined the properties of chitosan-cellulose hydrogel beads as an adsorbent and its application for lead ion adsorption. Chitosan was blended with cellulose to improve the mechanical strength of chitosan hydrogel beads and the chitosan-cellulose hydrogel beads were cross-linked with ethylene glycol diglycidyl ether (EGDE) to enhance their acid-resistant ability. Scanning elec...

2017
Raphaël Riva Anne des Rieux Nicolas Duhem Christine Jérôme Véronique Préat

Chitosan is a nontoxic, biodegradable, and biocompatible polysaccharide of b(1-4)-linked D-glucosamine and N-acetyl-D-glucosamine. This derivative of natural chitin presents remarkable properties that have paved the way for the introduction of chitosan in the biomedical and pharmaceutical fields. Nevertheless, the properties of chitosan, such as its poor solubility in water or in organic solven...

2010
Akram Zamani Lars Edebo Claes Niklasson Mohammad J. Taherzadeh

The temperature-dependent hydrolysis and solubility of chitosan in sulfuric acid solutions offer the possibility for chitosan extraction from zygomycetes mycelia and separation from other cellular ingredients with high purity and high recovery. In this study, Rhizomucor pusillus biomass was initially extracted with 0.5 M NaOH at 120 °C for 20 min, leaving an alkali insoluble material (AIM) rich...

Journal: :The Journal of biological chemistry 2011
Chelsea L Bueter Chrono K Lee Vijay A K Rathinam Gloria J Healy Christopher H Taron Charles A Specht Stuart M Levitz

Chitin is an abundant polysaccharide found in fungal cell walls, crustacean shells, and insect exoskeletons. The immunological properties of both chitin and its deacetylated derivative chitosan are of relevance because of frequent natural exposure and their use in medical applications. Depending on the preparation studied and the end point measured, these compounds have been reported to induce ...

2006
Chalonglarp TANGSADTHAKUN Sorada KANOKPANONT Neeracha SANCHAVANAKIT Tanom BANAPRASERT Siriporn DAMRONGSAKKUL

Biopolymer blends between collagen and chitosan have the potential to produce cell scaffolds with biocompatible properties. In this study, porous scaffolds were fabricated by freeze drying the solution of collagen and chitosan and crosslinked by dehydrothermal treatment (DHT). Various types of scaffolds were prepared by varying compositions of collagen and chitosan. The scaffolds were fully cha...

Journal: :Bioscience, biotechnology, and biochemistry 1999
J K Lee S U Kim J H Kim

Cholestyramine is the most widely used bile acid sequestrant in the treatment of hypercholesterolemia. However, cholestyramine has unpleasant side effects as a consequence of its hydrophobic backbone. Therefore, high-capacity bile acid sequestering biopolymers with cationic chitosan derivatives were developed, because electrostatic interactions are important for binding with bile acid anions. D...

2014
T. S. Moe T. A. Khaing

Chitosan is a derivative of chitin, a compound usually isolated from the shells of some crustaceans such as crab, lobster and shrimp. It has biocompatible, biodegradable, and antimicrobial properties. To use these properties of chitosan in biomedical fields, chitosan films (1%, 2%, 3% and 4%) were prepared by using l% lactic acid as solvent. The effects of chitosan films on tensile strength, el...

Journal: :Biomacromolecules 2009
Pei Lian Ma Marc Lavertu Françoise M Winnik Michael D Buschmann

The interaction of chitosan with plasmid DNA was investigated as a function of pH, buffer composition, degree of deacetylation (DDA), and molecular weight (M(n)) of chitosan, using isothermal titration microcalorimetry (ITC). The Single Set of Identical Sites model was used to obtain the enthalpy of interaction, the binding constant, and the stoichiometry of binding. The chitosan-DNA interactio...

2002
Tugce Dastan Kadir Turan

Purpose: Chitosan has a high potential for transferring DNA molecules into mammalian cells because of its cationic properties. In the present study, we have investigated DNA encapsulation efficiency and loading capacity of chitosan microparticles prepared in different conditions, as well as in vitro DNA release from microparticles, and transfection of different cell lines with chitosan-DNA micr...

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