BACKGROUND Graphene oxide (GO)can be dispersed through functionalization, or chemically converted to make different graphene-based nanocomposites with excellent mechanical and thermal properties. Chitosan, a partially deacetylated derivative of chitin, is extensively used for food packaging, biosensors, water treatment, and drug delivery. GO can be evenly dispersed in chitosan matrix through th...

This work presents the morphology and characterization of chitosan nanoparticles crosslinked with lecithin in form nano-onions obtained by an easy, economical, possibly scalable method from a polymeric precursor known as chitosan. The creation new products using shrimp waste is fundamental factor avoiding water pollution. These materials have positive impact they add value to waste, provide opp...

Abstract The production of the amino polysaccharide (chitosan) from crustacean sources has faced many hindrances due to environmental, seasonal and noneconomic issues. On other hand, mycogenic chitosan advantages that make it suitable for medical nutritional applications over non-mycological counterparts. A number fungal isolates have been screened production, where most potent isolate genetica...

Bacillus licheniformis MB-2, isolated from a hot spring water in Manado, Indonesia, secreted a unique chitosanase. Media consisted of 0.24% chitosan, 0.25% casiton, 1% MgSO4, 1.4% K2HPO4, 0.02% CaCl2 x 2H2O, 0.002% FeSO4 x 7H2O (w/v) was used for enzyme production. Purification of the enzyme through the hydrophobic interaction chromatography system (butyl Sepharose 4 FF) resulted in two major a...

Chitosan is one of the important biopolymers and it is extracted from exoskeletons of crustaceans in sea food waste. It is a suitable eco-friendly carbon steel corrosion inhibitor in acid media; the deacetylation degree of prepared chitosan is more than 85.16 %, and the molecular weight average is 109 kDa. Chitosan was modified to 2-N,N-diethylbenzene ammonium chloride N-oxoethyl chitosan (comp...

Chitosan has varieties of applications in both pharmaceutical and cosmetic products. To explore the situation of chitosan awareness and usage in Thailand is an essential information for product development from chitosan. Entrepreneurs or their representatives from GMP certified pharmaceutical and cosmetic manufacturers were interviewed during June 2007 to February 2008. One hundred and five fro...

Chitosan has been shown to be effective in regulating progenitor salivary tissue morphogenesis, however, the specificity of chitosan effects remains unclear. To assess the regulatory ability of chitosan in salivary gland morphogenesis, progenitor salivary tissue from embryonal submandibular gland (SMG) was cultured in chitosan-containing medium. It was found that soluble chitosan was able to pr...

The antibacterial activity of water-soluble chitosan derivatives prepared by Maillard reactions against Staphylococcus aureus, Listeria monocytogenes, Bacillus cereus, Escherichia coli, Shigella dysenteriae, and Salmonella typhimurium was examined. Relatively high antibacterial activity against various microorganisms was noted for the chitosan-glucosamine derivative as compared to the acid-solu...