title: Synthesis and characterization of some acyl thiourea derivatives of chitosan and their biocidal activities.
abstract: Three acyl derivatives of chitosan (CS) with different side chains were synthesized and their structures were characterized. Their swelling behavior was investigated. The antifungal behavior of these chitosan derivatives was investigated in vitro on the mycelial growth, sporulation and germination of conidia or sclerotia of the sugar-beet pathogens, Rhizoctonia solani K"uhn (AG2-2) and Sclerotium rolfsii Sacc. All the prepared derivatives had a significant inhibiting effect on the different stages of development on the germination of conidia or sclerotia of all the investigated fungi. In the absence of chitosan and its derivative, R. solani exhibited the fastest growth of the fungi studied.
authors.affiliation: Department of Chemistry, Faculty of Science, Cairo University, Giza, Cairo 12613, Egypt. Electronic address: said_elkholy2003@yahoo.com.
authors.forename: Said S
authors.initials: SS
authors.lastname: Elkholy
authors.affiliation: Department of Chemistry, Faculty of Science, Cairo University, Giza, Cairo 12613, Egypt.
authors.forename: Hend A
authors.initials: HA
authors.lastname: Salem
authors.affiliation: Department of Botany, Faculty of Science, Cairo University, Giza, Cairo 12613, Egypt.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Eweis
authors.affiliation: Department of Chemistry, Faculty of Science, Cairo University, Giza, Cairo 12613, Egypt.
authors.forename: Maher Z
authors.initials: MZ
authors.lastname: Elsabee
mesh_terms: D000935:Antifungal Agents / Q000737:chemistry / Q000494:pharmacology; D048271:Chitosan / Q000138:chemical synthesis / Q000737:chemistry*; D004202:Disinfectants / Q000737:chemistry* / Q000494:pharmacology*; D008826:Microbial Sensitivity Tests; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry; D013890:Thiourea / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D000935:Antifungal Agents; D004202:Disinfectants; D048271:Chitosan; D013890:Thiourea
keywords: Antifungal activity 1; Characterization; Chitosan thiourea; Swelling behavior