Kohki Akiyama*, Kazuyoshi Kawazu and Akio Kobayashi Department of Agricultural Science, Okayama University, Okayama 700, Japan Z. Naturforsch. 49c, 811-818 (1994); received July 12, 1994 Elicitor, Chitin, Chitosan, Flavonoid, Pisum sativum Pisatin elicitors including fragments of chitosan and partially N-deacetylated chitins (DACs) strongly induced (+)-a,2',4,4'-tetrahydroxydihydrochalcone, (-)...

How to cite this article: Journal of Advanced Materials, 2017,1, 1: 23-30 ABSTRACT Evaluation of antimicrobial activity with Ciprofloxacin (C) (control of antibacterial study) and ketoconazole (K) (control antifungal activity) compounds released from chitosan based composites [(A1 (CS/PVP/fMWCNT) A2 (CS/PVP/f-MWCNT-GLU)] against gram positive bacteria and gram negative have been studied. The in...

Chitosan has been reported to be a non-toxic, biodegradable antibacterial agent. The aim of this work was to elucidate the relationship between the molecular weight of chitosan and its antimicrobial activity upon two model microorganisms, one Gram-positive (Staphylococcus aureus) and one Gram-negative (Escherichia coli). Atomic force microscopy (AFM) imaging was used to obtain high-resolution i...

Surface chemistry and structure determines most uses of textiles (adhesion, skin contact, handle ...) whereas the fibre core has to give strength. Thus, new strategies have to be developed for imparting permanent functionality to textile surfaces. This aim can be reached by using e.g. biocompatible polymers like carrageenans, chitosans from the carbohydrate family or some of their derivatives f...

Chitosan and chitooligosaccharides (COS), as derivatives of chitin through deacetylation reaction, have broad applications due to their good biodegradability, biocompatibility, solubility. In addition, chitosan COS are involved in cell wall morphogenesis host–pathogen interactions vivo. Chitin deacetylases (CDAs) enzymes that can catalyze the de-N-acetylation chitin. They widely distributed pro...

Novel amphiphilic chitosan derivatives (N-caprinoyl-N-trimethyl chitosan [CA-TMC]) were synthesized by grafting the hydrophobic moiety caprinoyl (CA) and hydrophilic moiety trimethyl chitosan to prepare carriers with good compatibility for poorly soluble drugs. Based on self-assembly, CA-TMC can form micelles with sizes ranging from 136 nm to 212 nm. The critical aggregation concentration incre...

Viscoelastic, gel-like, polymeric dispersions (HVPDs) can be prepared by crosslinking polyols with borax or boric acid in water under alkaline conditions. Rheologically similar HVPDs have been prepared in organic liquids containing no water or hydroxylic groups through crosslinking partially or fully hydrolysed poly(vinyl acetate)s with trimethyl borate, boric acid, or borax. The organo-HVPDs a...

Our previous study (Z. X. Peng et al., Carbohydr. Polym. 81:275-283, 2010) demonstrated that water-soluble quaternary ammonium salts, which are produced by the reaction of chitosan with glycidyl trimethylammonium chloride, provide chitosan derivatives with enhanced antibacterial ability. Because biofilm formation is believed to comprise the key step in the development of orthopedic implant-rela...

Rapid industrialization and modernization have introduced substantial amounts of toxic heavy metals into the aquatic and terrestrial environment which possess a serious threat to the flora and fauna. In recent years, considerable research work has been done and is currently underway on a number of natural biopolymers and their modifications to remove different kinds of heavy metal ions. Chitosa...