In present study, the thermal conductivity of silver/water nanofluid was investigated experimentally. Four different volume concentrations of nanofluids (2, 3, 5 and 10%) were prepared by dispersing silver nanoparticles in water. The properties of nanofluids were measured by varying the temperature from 20ºC to 100ºC and also, different sizes of nanoparticles dispersed in water (20-30, 50-60 and 100-110 nm). The obtained results demonstrate that the thermal conductivity of nanofluids is the function of volume concentration, nanoparticles size and temperature. In addition, the impact of nanoparticles on the viscosity of the fluid was studied at different concentrations. Manuscript profile

In this paper, chitosan-copper nanoparticles were successfully coated onto the Kraft paper using a dip coating process. First, chitosan-copper nanoparticles solution was prepared by reduction method and the use of ultrasonic radiation. It was employed copper sulphate pentahydrate as precursor salt, NaOH as a reducing agent and chitosan as capping agent to prepare chitosan-copper nanoparticles solution. The solution was analyzed by UV-Vis spectroscopy and dynamic light scattering (DLS). The size range of the produced chitosan-copper nanoparticles was about 60 nm. These chitosan-copper nanoparticles were successfully coated onto the Kraft paper using a dip coating process. The coated Kraft paper established very perfect antibacterial activity in contrast to gram negative and gram positive bacteria.After coating process, the coated Kraft paper was characterized by X-Ray diffraction and scanning electron microscopy (SEM). Then, the antimicrobial activity of the Kraft paper in contrast to Bacillus subtilis and Escherichia coli was measured by disc diffusion method. Manuscript profile

The present study was carried out to investigate the preparation of chitosan-Ag nanocomposite film for food packaging. Since chitosan is a suitable alternative to produce packaging films due to favorable factors such as biodegradability and abundance in the world therefore in this study, Since chitosan is a suitable alternative to produce packaging films due to favorable factors such as biodegradability and abundance in the world, therefore in this study, it was prepared chitosan-Ag nanocomposite with antibacterial properties for food packaging by combining chitosan and Ag nanoparticles. The produced nanocomposite was characterized by XRD and FESEM. The antibacterial activity of produced film was measured in different concentrations of silver nitrate against E. coli and S. aureus. The results showed high antibacterial activity in chitosan-Ag chitosan. It was also found that with an increase in the concentration of Ag nanoparticles in the nanocomposite to 0.03, the ant antibacterial effects increased and then remained constant. Manuscript profile

In recent years, there is a lot of interest to synthesis of nanostructures as carriers for drug delivery. These structures are considered as a highly effective drug delivery system due to controlling drug release, protecting the pharmaceutical molecule, and environmentally friendly. In this study, the synthesis of chitosan nanoparticles was carried out by chemical method. The nanoparticles size was measured by dynamic light scattering (DLS). Also, it was used from atomic absorption spectrometry (AAS), FTIR and transmission electron microscopy (TEM) to confirm the loading of antibiotic onto nanoparticles and to calculate the percentage of the drug loaded. In addition, it was used from clarithromycin as antibiotic. The antibacterial activity was studied by the disc-diffusion method and the effect of different co The antibacterial activity was studied ncentrations of drug in nano-carriers was investigated and it was determined the optimum antibacterial activity of drug nanocarrier was happened in concentration 0.6 gr/10 ml. Manuscript profile

The production of antibacterial and antifungal nanocomposites is widely used in pharmaceutical, health, food, packaging and medicine industries. Meanwhile, epoxy coating film is one of the most commonly used protective coatings in industrial applications. In this work, ZnO nanoparticles were first synthesized at three different concentrations. UV-Vis spectroscopy and dynamic light scattering (DLS) analysis were used to study the nanoparticles properties. The results showed that nanoparticles were synthesized with a mean size of 46 nm at 0.01 M zinc sulfate. Then, the nanoparticles were mixed with epoxy at three concentrations and finally ZnO/epoxy nanocomposite were prepared. X-ray diffraction (XRD) and Scanning electron microscopy (SEM) confirmed the existence and size of nanoparticles in epoxy film. The disk diffusion method was used to study the antibacterial activity of ZnO-epoxy nanocomposites against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). The results exhibited that the optimum antibacterial activity was in nanocomposite films with concentration 0.01 M of zinc sulfate. Manuscript profile

In recent years, there is a lot of interest in synthesis of nanostructures as carriers for drug delivery.These structures are considered as a highly effective drug delivery system due to controlling drugrelease, protecting the pharmaceutical molecule, and environmentally friendly. In this study, thesynthesis of chitosan nanoparticles was carried out by chemical method. The nanoparticles size wasmeasured by dynamic light scattering (DLS). Also, it was used from atomic absorption spectrometry(AAS), FTIR and transmission electron microscopy (TEM) to confirm the loading of antibiotic ontonanoparticles and to calculate the percentage of the drug loaded. In addition, it was used forclarithromycin as antibiotic. The antibacterial activity was studied by the disc-diffusion methodand the effect of different concentrations of the drug in nano-carriers were investigated and it wasdetermined the optimum antibacterial activity of drug nanocarrier was happened in concentration0.6 gr/10 ml. Manuscript profile

The production of antibacterial and antifungal nanocomposites is widely usedin pharmaceutical, health, food, packaging and medical industries. Meanwhile,the epoxy coating film is one of the most commonly used protective coatings inindustrial applications. In this work, ZnO nanoparticles were first synthesized atthree different concentrations. UV-Vis spectroscopy and dynamic light scattering(DLS) analysis were used to study the nanoparticles properties. The results showedthat nanoparticles were synthesized with a mean size of 46 nm at 0.01 M zincsulfate. Then, the nanoparticles were mixed with epoxy at three concentrationsand finally ZnO/epoxy nanocomposite were prepared. X-ray diffraction (XRD)and Scanning electron microscopy (SEM) confirmed the existence and size ofnanoparticles in epoxy film. The disk diffusion method was used to study theantibacterial activity of ZnO-epoxy nanocomposites against Escherichia coli(E. coli) and Staphylococcus aureus (S. aureus). The results exhibited that theoptimum antibacterial activity was in nanocomposite films with concentration0.01 M of zinc sulfate. Manuscript profile

The present study was carried out to investigate the preparation of chitosan-Ag nanocomposite film for food packaging. Since chitosan is a suitable alternative to produce packaging films due to favorable factors such as biodegradability and abundance in the world, therefore in this study, it was prepared chitosan-Ag nanocomposite with antibacterial properties for food packaging by combining chitosan and Ag nanoparticles. The produced nanocomposite was characterized by XRD and FESEM. Antibacterial activity of the produced film was studied at different concentrations of silver nitrate againstEscherichia coliandStaphylococcus aureus. The results showed high antibacterial activity in chitosan-Ag chitosan. It was also found that with an increase in the concentration of Ag nanoparticles in the nanocomposite to 0.03, the ant antibacterial effects increased and then remained constant. Manuscript profile

In this paper, Chitosan-copper nanoparticles were successfully coated onto the Kraft paperusing a dip coating process. First, chitosan-copper nanoparticles solution was prepared byreduction method and the use of ultrasonic radiation. It was employed copper sulphate pentahydrateas precursor salt, NaOH as a reducing agent and Chitosan as capping agent to prepareChitosan-copper nanoparticles solution. The solution was analyzed by UV-Vis spectroscopyand dynamic light scattering (DLS). After the coating process, the coated Kraft paper was characterizedby X-Ray diffraction and scanning electron microscopy (SEM). Then, the antimicrobialactivity of the Kraft paper, in contrast to Bacillus subtilis and Escherichia coli was measuredby disc diffusion method. Manuscript profile