TAILIEUCHUNG - A green and simple synthesis of chitosan/Ag nanocomposites and study for their antibacterial activity on staphylococcus aureus and escherichia coli

A green and simple approach has been successfully developed to synthesize chitosan/Ag nanocomposites using kumquat extract as a biological reducing agent. It indicates to be an ecofriendly and green method for the synthesis providing a cost effective and an efficient route for the chitosan/Ag nanocomposites’ synthesis. The prepared chitosan/Ag nanocomposites have been characterized by UV-vis, TEM, FTIR, and XRD. Result showed those chitosan/Ag nanocomposites have been obtained with average particle size ~15-25 nm. | A green and simple synthesis of chitosan/Ag nanocomposites and study for their antibacterial activity on staphylococcus aureus and escherichia coli Vietnam Journal of Science and Technology 56 (2A) (2018) 89-98 A GREEN AND SIMPLE SYNTHESIS OF CHITOSAN/Ag NANOCOMPOSITES AND STUDY FOR THEIR ANTIBACTERIAL ACTIVITY ON STAPHYLOCOCCUS AUREUS AND ESCHERICHIA COLI Tran Thi Bich Quyen1, *, Tran Quang Thanh1, Ha Thanh Toan2, Doan Van Hong Thien1, Nguyen Trong Tuan3 1 Department of Chemical Engineering, College of Technology, Can Tho University, 3/2 Street, Ninh Kieu District, Can Tho City, Viet Nam 2 Biotechnology Research and Development Institute, Can Tho University, 3/2 Street, Ninh Kieu District, Can Tho City, Viet Nam 3 Department of Chemistry, College of Natural Sciences, Can Tho University, 3/2 Street, Ninh Kieu District, Can Tho City, Viet Nam * Email: ttbquyen@ Received: 4 April 2018; Accepted for publication: 12 May 2018 ABSTRACT A green and simple approach has been successfully developed to synthesize chitosan/Ag nanocomposites using kumquat extract as a biological reducing agent. It indicates to be an eco- friendly and green method for the synthesis providing a cost effective and an efficient route for the chitosan/Ag nanocomposites’ synthesis. The prepared chitosan/Ag nanocomposites have been characterized by UV-vis, TEM, FTIR, and XRD. Result showed those chitosan/Ag nanocomposites have been obtained with average particle size ~15-25 nm. Moreover, the synthesized chitosan/Ag nanocomposites also showed their efficient antimicrobial activity against S. aureus and E. coli. The chitosan/Ag nanocomposite was found to have significantly higher antimicrobial activity than its components at their respective concentrations. The presence of a small percentage ( %, w/w) of metal nanoparticles in the nanocomposite was enough to significantly enhance inactivation of S. aureus and E. coli as .

• Sinh học
• Vietnam Journal of Science and Technology
• Bài viết khoa học
• Tạp chí Khoa học Công nghệ Việt Nam
• Silver nanocomposites
• Chitosan nanocomposites
• Environmental friendly
• Journal of Science
• Journal of Technology
• Technology Management
• Science and Technology
• International integration
• Journal of Marine Science and Technology
• Present state of ocean observations and service in Vietnam
• Unmanned Aerial Vehicle
• The Vietnam Academy of Science and Technology
• Ministry of Natural Resources and Environment
• Research Organizations
• Policy Planning
• Science and Technology development
• Theory Z
• Human Resources
• Development policy of Japan
• Technology and innovation system
• STI system
• Universities of Vietnam
• Model of Scientific Research
• Social Science Research System
• Nucleotide diversity of 15 conifer species in Vietnam’ s central highland
• Highland of Vietnam
• 15 conifer species
• Species of conifers
• Journal of Vietnam Agricultural Science and Technology
• Tạp chí Khoa học Công nghệ Nông nghiệp Việt Nam
• Agro food value chain
• Trade policy Vietnam
• Vietnam’s agricultural export
• The agricultural market
• The improved upland rice technology (IURT)
• Contract farming
• Improved technology
• Ssubsequent effect
• Application of passive remote sensin
• Upward looking microwave radiometers
• Technology Institute Vietnam Academy
• Trees canopyusing ground based
• Close innovation
• Open innovation
• Technological innovation
• Mechanical engineering
• R&D Organization
• Research activity
• Modeling studies of Vietnam lemongrass essential oil extraction process
• Lemongrass essential oil
• Response surface methodology
• Box Behnken design
• Kinetics of pyrolysis reaction
• Agricultural residues in Vietnam
• Corn cob and sugarcane bagasse
• Pyrolysis or gasification
• A hopane triterpenoid
• The mycelium of isaria japonica in Vietnam
• NMR assignment for 11β
• 22 dihydroxyhopane
• Spectral data analysis
• Seawater desalination applications in Vietnam
• Potential and challenges
• Current seawater desalination plants
• The MD process including configurations
• Characteristics of elemental and organic carbon
• Different sampling locations in vietnam
• NPs in the atmosphere
• Journal of Science and Technology
• Antibiotics and pesticides in water and sediments
• Intensive shrimp farms in southern Vietnam
• Mekong Delta Vietnam
• Arge amount of antibiotics
• Chemical constituents and biological activities
• Alpinia kwangsiensis collected in Vietnam
• Methanol extract of Alpinia kwangsiensis roots
• Staphylococcus aureus and Bacillus subtilis
• Wave characteristics in east Vietnam sea
• WAM cycle 4
• East Vietnam Sea
• Wave field Typhoon
• Using benthos to evaluate the quality
• The incident caused by formosa
• The central Vietnam
• The fungal strain FBV40
• Purification and characterization of laccase involved
• The white rot fungus isolated
• Bavi forest of Vietnam
• Study of sudden ionospheric disturbances
• Low frequency receiver
• Nha Trang province
• The sudden ionospheric disturbance
• Preliminary assessment of Btex
• Indoor and outdoor air
• Residential homes in Hanoi
• Among BTEX compounds