ABSTRACT
The present work describes the preparation of ZnO nanoparticles loaded starch-coated polyethylene film. The presence of ZnO nanoparticles was confirmed by surface plasmon resonance (SPR), X-ray diffraction (XRD) studies and transmission electron microscopy (TEM). The ZnO loaded film was tested for its biocidal action against model bacteria Escherichia coli using zone inhibition and killing kinetics of bacterial growth methods. This newly developed material bears potential to be used as food packaging material to prevent food stuff from bacterial contamination.
Subject(s)
Escherichia coli/drug effects , Food Packaging/methods , Metal Nanoparticles/chemistry , Polyethylene/chemistry , Zinc Oxide/pharmacology , Anti-Bacterial Agents/pharmacology , Disk Diffusion Antimicrobial Tests , Escherichia coli/growth & development , Materials Testing , Metal Nanoparticles/ultrastructure , Microscopy, Electron, Transmission , Particle Size , Starch/chemistry , Surface Plasmon Resonance , X-Ray Diffraction , Zinc Oxide/chemistryABSTRACT
The present work describes ceric ammonium nitrate (CAN) initiated graft copolymerization of acrylamide onto cellulose-based filter paper followed by entrapment of silver nanoparticles. The copolymerization was carried out in aqueous solution, containing 2M acrylamide monomer and 16mM N,N'-methylene bisacrylamide (MB) crosslinker. The optimum initiation time and grafting reaction temperature were found to be 15min and 30 degrees C, respectively. The silver nanoparticles were loaded into grafted filter paper by equilibration in silver nitrate solution followed by citrate reduction. The formation of silver nanoparticles has been confirmed by TEM and SAED analysis. The novel nano silver loaded filter paper has been investigated for its antimicrobial properties against E.coli. This newly developed material shows strong antibacterial property and thus offers its candidature for possible use as antibacterial food-packaging material.
Subject(s)
Anti-Bacterial Agents/chemical synthesis , Cellulose/chemistry , Food Packaging/methods , Metal Nanoparticles , Paper , Silver , Acrylamides/chemistry , Anti-Bacterial Agents/pharmacology , Cerium/chemistry , Escherichia coli/drug effects , Microscopy, Electron, TransmissionABSTRACT
In recent past magnetic nanoparticles have been explored for a number of biomedical applications due to their superparamagnetic moment with high magnetic saturation value. For these biomedical applications, magnetic nanoparticles require being monodispersed so that the individual nanoparticle has almost identical physico-chemical properties for biodistribution, bioelimination and contrast imaging potential. Further, the surface functionalization/modification of magnetic nanoparticles ultimately facilitate the protein or DNA separation, detection and magnetic resonance imaging contrast, drug delivery and hyperthermia applications. The essential goal of this review is to evaluate the recent advances of magnetic nanoparticles for tumor, brain targeting and hyperthermia applications.
Subject(s)
Drug Delivery Systems/instrumentation , Drug Delivery Systems/methods , Nanotechnology/instrumentation , Nanotechnology/methods , Neoplasms/drug therapy , Animals , Humans , Hyperthermia, Induced , Magnetics , Mice , Models, Chemical , Nanoparticles/chemistry , RatsABSTRACT
This review article is focused on the various approaches that have been made to synthesize metal nanoparticles with predetermined shape, size, and fair stability. Due emphasis has been given on polymer stabilized nanoparticles. In addition use of other varieties of stabilizers like inorganic salts, organic compounds, organic solvent, biological molecules, etc. have also been discussed. Finally, formation of two and three-dimensional nanostructures like nanowires, nanodiscs, nanoprisms has also been revealed.
