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Research Subject: The conversion of anthropogenous CO₂ gas into value-add chemicals known as solar fuel technology attracted much consideration from the beginning of the 21st century owing to the potential of this technology in solving the climate change and energy shortage issues.
Research Approach: In the current study, Bismuth and copper modified TiO₂ were prepared using sol-gel and wet impregnation method in order to investigate as a catalyst for photocatalytic conversion of carbon dioxide into renewable methane.  
Main Results: The results of X-ray diffraction analysis, Field emission scanning microscope images and Transmission electron microscope images demonstrated that titanium dioxide nanoparticles with 20 nm in size were synthesized that after the addition of bismuth, the size of particles became smaller. Also, using energy dispersive x-ray analysis and elemental mapping technique, it was determined that the bismuth and copper were uniformly inserted in the prepared nanoparticles. Diffuse reflectance spectroscopy showed that the bandgap became smaller in bismuth and copper-containing samples, which resulted in visible light absorption. In addition, photoluminescence spectroscopy showed an impressive decrease in the rate of electron-hole separation in the prepared nanocomposite. The result of CO₂ photoreduction experiments revealed that the incorporation of 3 wt% Bismuth and 1.5 wt% copper into the structure of TiO₂ would increase the amount of methane production to 7.6 times greater than bare TiO₂. This superior activity for methane generation could be related to the ability of bismuth compounds in adsorption and activation of carbon dioxide molecules and also the efficient separation of charge carriers given by copper. Additionally, the smaller particle size and increase in the surface area had also a positive effect on the CO₂ reduction enhancement.

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Abstract:
Research subject: Leaching and recovery parameters controlling the releasing of selenium from Sar-Cheshmeh copper anode slimes are studied and determined.
Research approach: Copper anode slimes is produced during the production of cathodic copper at the bottom of electrolyte cells, which is composed of insoluble anode components in the electrolyte. The copper anode slimes are made up of those components of the anodes, which are not soluble in the electrolyte. They contain varying quantities of precious metals like gold, silver, selenium and tellurium, and other precious metals in the anodic copper. They are being extracted as a by-product in the copper production process. Due to the fact that the main source of selenium is sulfur deposits such as copper and nickel. Copper anodic slimes is currently the only source of selenium in the world. In this study, the extraction of selenium from anodic copper slimes has been feasible. To do this, acid leaching has been used. Copper anodic sludge is the raw material for the production of more than 90% of the world's selenium and is the main source of selenium production.[1-3]
Main result: In this paper, the effect of operational parameters such as acid concentration, temperature, process time and liquid to solid ratio on selenium recovery through copper slimes leaching was investigated. The optimum conditions of batch leaching For maximum selenium extraction from anodic copper slimes are attained at 3 mol L^-1 of HNO₃ concentration, 0.01 (W/V) solid to liquid ratio for 60 min contact time at 70 º­C. Under the optimized conditions, the selenium leaching efficiency was 99%. The thermodynamic data showed positive values of both ΔH and ΔS which indicates that the leaching process is indeed endothermic and random while the obtained negative values of ΔG show that selenium dissolution process is spontaneous in nature.

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Salmonella is the serious and prevalent bacteria that has important role in epidemic infections. Beside increase of antibiotics resistance in bacteria make that abundance researches did for introduction of replacement method for beard with bacteria infections. Copper NANO oxide particles are components that their anti-microbial nature be evidenced. In this research for discover of NANO particles probably mechanism on the genome of bacteria, salmonella selected as a model for Gram-negative bacteria. In this regard, at first the bacteria were treated with 30 and 60 µg/ml copper oxide NANO particles. At time intervals of 2, 4, and 24 hours. In this doses, bacteria was growth .So bacteria were treated with 90 and 120 µg/ml copper oxide NANO particles. In these doses growth of bacteria even after 24 h completely were stopped .Then their DNA were extracted. In order to investigate the effects of copper oxide NANO particles on the genome, the chain reaction techniques of (RAPD-PCR) was employed .Using the software NTSYS-PC, the results obtained from electrophoresis of PCR products on agarose gel were analysis. The results of the study revealed that copper oxide NANO particles not only affects the growth of bacteria but also affect the sequencing of genomic DNA and leads to the changes of them in different points.

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Simulation Modeling is Useful Tools to Analyze and Evaluate the Dynamic Behavior of the Complex Systems. In this Paper a Simulation Model Developed for Material Handling Equipment in the Sulphid Ore Process of Sarcheshmeh Open-Pit Copper Mine in Sarcheshme Kerman Province of Iran for Increase its Productivity. The Optimum Operating Setting of Sulphid ore Process of an Open-Pit Mine Is Determined Using Simulation Based Optimization Meta Modeling Approach. In the Developing Meta Model Step of this Paper, Design of Experiment (DOE) is used to Identify Critical Variable of the System by Fitting a Quadratic Polynomial Model. Absolute Relative Error (ARE) used to Verification and Validation Meta model. Validation Step Shown That Meta Model Provides Good Estimation to Simulation Results, Therefore It is Validate. Experimental Results Shown That by Using Current Situation Resources, the Optimization Simulation Model Generates Improving Monthly Throughput Rate of Production System and also Decrease Transportation Cost Up 8%.

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Aims: The present study intends to assess the toxicity of CuO and ZnO nanoparticles (NPs) at laboratory conditions on some pathogenic bacteria for the reared fish, as well as, a bioassay on rainbow trout.
Material & Methods: For this purpose, the sensitivity of them to the mentioned NPs with a reference antibiotic (florfenicol) was assayed through the well diffusion method, as well as, minimum inhibitory concentration (MIC) and minimum bacteriocidal concentration (MBC) were determined by microdilution technique. On the other hand, the lethal toxicity test has been accomplished to the calculation of median lethal concentration (LC50) on some rainbow trout (55.3±7.6 g) in static condition for the 96 consecutive hours. We use one-way ANOVA and Probit regression in order to data analysis.
Findings: Results show that NPs of copper oxide and zinc oxide could significantly inhibit the growth of Streptococcus iniae or kill it at 0.18 and 0.24 µg/ml and more, respectively. The comparison between LC50-96h quantities of CuO NP (107.4 µg/l) and ZnO NP (102.3 µg/l) indicated that the CuO NP has more toxic potential.
Conclusion: According to the laboratory findings, the susceptibility of S. iniae and L. garvieae to ZnO NP were close to florfenicol. The mortality in the fish species due to lethal toxicity would occur if the effective concentration of NPs on the bacterial pathogenic agents being used directly.

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Aim: The purpose of this study was to investigate the effect of replacement of copper sulfate with nano oxidase in diet on growth and survival, enzymatic activity and pathology of liver tissue of goldfish in 2018. Material and Methods: Experimental treatments consisted of 5 control treatments, 3 mg / kg copper sulfate; 3 mg / kg nano-oxide, 5 mg / kg nano-oxide and 10 mg / kg nano-oxide, and fish were given 4% by weight twice a day for 60 days. The body was fed manually. At the end of the trial period, growth and survival indices , liver enzymes activity (alkaline phosphatase, aspartate transaminase, alanine, Aminotransferase) as well as liver tissue pathology were evaluated. Finding: Based on the results, using copper nanoparticles at different levels of 3, 5 and 10 mg / kg diet instead of copper sulfate in the diet can improve the growth performance and survival of goldfish. Copper sulfate also has more negative effects on liver tissue than nanoparticles, as well as alkaline phosphatase, aspartate aminotransferase, alanine aminotransferase enzymes; therefore, the replacement of copper sulfate with copper nanoparticles in the diet seems to reduce the effects of water. On the other hand, histopathological results of liver tissue treatment with 5 and 10 mg Cu / kg diet showed that Cu nanoparticles cause tissue lesions and deleterious effects (albeit less than copper sulfate). Conclusion: Copper sulfate with copper nanoparticles at levels of 3 mg / kg diet To be carried out.

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Due to the increasing demand for nanotechnologies, there is a rising concern about the potential risks of nanomaterials to human health, environment, and aquatic ecosystems. The chemical composition and small size of the nanomaterials are the most important factors in the toxicity of these materials. Histological study of gill and investigation of haematological parameters are important for monitoring of the health status in aquatic animals. Therefore, in this study, the effects of subacute concentrations of copper oxide nanoparticles were examined on some haematological parameters of Caspian Roach (Rutilus rutilus). The experiment was performed at 15 litres aquariums in three experimental groups including 10, 40, 80 ppm copper oxide nanoparticle and the control group for 42 days. Each treatment included three replicates consisting of seven juveniles carp with an approximate weight of 42± 2 gr. The results of this experiment showed that copper oxide nanoparticle caused hyperplasia, lamellar fusion, epithelial hypertrophy, lamellar aneurism, and reduces secondary lamellae length. In addition, red blood cells (RBC) was significantly decreased with the increase in the concentration of copper oxide nanoparticle (P<0.05). At the end of treatment, RBC had a significant reduction from 2.11±0.004 to 1.98±0.005. Hematocrit and haemoglobin reduced from 1.37±0.011 to 1.34±0.001 and 7.8±0.01 to 6.9±1.32, respectively (P<0.05). A significant reduction was recorded in hematocrit among the control groups and other treatments (P<0.05). Conclusion: Eventually it can be concluded that the sub-acute particles may causes damage to the surface of tissues, especially gill tissue, and changes in the level of blood factors in fish, which can be due to the destructive effects of this type of nanoparticle on hematopoietic organs such as liver and kidney. Therefore, a definite conclusion in this regard requires more and more extensive research on the same species and other species.

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Background: This research aimed to assess the antibacterial and anti-biofilm properties of copper nanoparticles (CuNPs) produced using Artemisia biennis Willd through an eco-friendly approach, targeting four pathogenic bacteria.
Materials & Methods: A. biennis Willd extract with unit numbers “15.62-125” was prepared through maceration, drying, and powdering. Particle size distribution (PSD), dynamic light scattering (DLS), zeta potential, X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FT-IR) tests were used to characterize the synthesized CuNPs. Minimum inhibitory concentrations (MICs), minimum bactericidal concentrations (MBCs), and sub-minimum inhibitory concentrations (sub-MICs) were determined to investigate the antibacterial and anti-biofilm activities of CuNPs against Staphylococcus aureus ATCC 25923, Enterococcus faecalis ATCC 29212, Escherichia coli ATCC 25922, and Klebsiella pneumoniae ATCC 13883.
Findings:  CuNPs synthesized using A. biennis Willd extract exhibited a brown color change with particle sizes mainly 30-40 nm by PSD. DLS indicated uniform distribution and hydrodynamic synthesis of particles with a zeta potential of -37.8. XRD and FTIR confirmed copper nanoparticle biosynthesis. The MICs of CuNPs were 15.62-62.5 μg/mL, with S. aureus and K. pneumonia revealing the highest and lowest antimicrobial drug resistance, respectively. This trend was repeated for MBCs and sub-MICs, ranging from 15.62-125 and 7.8-31.25 μg/mL, respectively. Bacterial strains were unable to form biofilms at sub-MICs. The anti-biofilm effects of CuNPs were more significant on Gram-negative bacteria.
Conclusion: CuNPs synthesized using A. biennis Willd extract by a green method show promising anti-biofilm and antibacterial characteristics against bacteria, suggesting their potential for treating bacterial infections.
 

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α-crystallin is a member of small heat shock protein family (sHSP) which shows both structural and chaperone functions. This protein plays important role in eye lens transparency and indicates protective function in the other tissues. The lenticular levels of copper ions significantly enhance in diabetic patients, aged and cataractous lenses. In eye lenses, the free copper ions induce ascorbic acid auto-oxidation, leading to formation of dehydroascorbic acid and other oxidative products as well as reactive oxygen species. The oxidized forms of ascorbic acid along with the reducing sugars enter into pathological reactions with the eye lens proteins, forming toxic advanced glycation end-products (AGEs). As one of the main components of eye lens antioxidant defense mechanism, glutathione could scavenge the copper ions, inhibiting the formation of reactive oxygen species in eye lenses.
In the current study, the structural and functional properties of human αB-crystallin were assessed using different spectroscopic methods. In the presence of copper ions, αB-crystallin exhibited important alterations in both structure and chaperone activity which upturned in the presence of glutathione. Moreover, incubation of human αB-crystallin with copper resulted in significant increase in the protein oligomeric size distribution which largely prevented upon simultaneous incubation with glutathione.
Overall, glutathione may scavenge free copper ions in the lenticular tissue, inhibiting their damaging effects on crystallin proteins and other redox-sensitive molecular targets such as ascorbic acid. Our results may introduce a new protective role for glutathione which is highly important in diabetic and aged lenses showing increased levels of copper ions.  

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This study aimed to isolate and identify bacteria from soils contaminated with copper and have access to a capable bacterial strain for producing copper nanoparticles (CuNPs). The present study showed the extracellular production of copper nanoparticles using strain Ta-31. The effect of various factors such as substrate, supernatant volume, enzyme inducer, and electron donor was investigated on the production process. The properties of synthesized nanoparticles were identified by using UV-Vis, FTIR, XRD, SEM, and EDS analysis.
Moreover, the growth curve of strain Ta-31 was plotted in the presence and absence of an enzyme inducer (concentration of 0.1 mM copper sulfate). After the phylogenetic analysis, 16S rDNA gene sequences were determined, and their phylogenetic tree of the selected strain was plotted. The results showed that the best conditions for producing CuNPs, glucose 1% as an electron donor, 2 mM copper sulfate, and 20 ml supernatant had the best production. Strain Ta-31 arrived at the end of the log phase and the beginning of the stationary phase after 15 h. CuNPs were spherical and irregular, and the size of CuNPs was more in the range of 30-40 nm. According to the results, strain Ta-31 belonged to Staphylococcus pasteuri sp. with 99.88% similarity. 
 

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One of the fundamental problems of Electrical Discharge Machining (EDM) process is tool electrode wear. In this study, ultra fine grains (UFG) structure of pure copper was used to improve performance and also increase the electrical wear resistance of tool electrode. Equal Channel Angular Pressing (ECAP) was used to reduce the crystal size of pure copper. Samples were processed through ECAP die up to 8 passes, and then used as electrode in EDM process. The effect of electrodes grain size, discharge current, and machining time on the metal removal of the work piece and electrical wear of the electrodes were investigated. In addition, the microstructure, and electrical conductivity of copper tool electrodes were examined. By applying the ECAP on pure copper a fine, approximately 50-200 nm grain size, microstructure was obtained after 8 passes. The results show that for finer crystalline structure of copper electrodes, electrical wear decreases but material removal rate is somehow constant.

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This study was performed to determine the effect of copper on growth performance, blood metabolites and claw health in young Holstein bulls in a humid area in north of Iran. One hundred and two young Holstein bulls (Initial body weight= 377.3±17.1 kg) were randomly allocated to two treatments in a completely randomized design for 56 days. The treatment groups received: (1) the basal diet of no supplemental Cu (control; n= 50); (2) basal diet plus 30 mg of Cu kg^-1 of Dry Matter (DM) as CuSO₄ (n= 52). Animals received fresh total mixed ration for ad libitum feeding allowing 10% refusals. The groups’ Dry Matter Intake (DMI) was assessed daily. The Body Weights (BW) were recorded and jugular blood samples collected on days 0, 28 and 56. All claws of young bulls were examined every two weeks for an identification of claw lesions. Copper supplementation improved Average Daily Gain (ADG) and gain:feed (G:F;P < 0.05). Serum cholesterol decreased with Cu supplementation (P< 0.001). Serum Zn, Cu, and urea N were not affected by supplementation of Cu; however, plasma total protein (P< 0.001), and albumin (P< 0.001) were increased by a supplementation of Cu. The prevalence of lameness was 19.6% and control group had the highest Odds ratio (OR= 2.43). As a result, it is concluded that supplemental Cu might improve growth performance in the finishing bulls and decrease the prevalence of lameness.

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Magnetic nanoparticles (MNPs) have emerged as contrast agents in magnetic resonance imaging (MRI) and metal-organic frameworks (MOFs) due to their high porosity and adjustable structure, serving as drug carriers and new contrast agents in biomedicine. Designing efficient nanoplatforms that leverage the combined properties of both MNPs and MOFs is of great importance.
In this study, we introduce a simple in-situ synthesis method for a mesopore core-shell nanocomposite structure of MOF@Cu-ferrite. Initially, Cu-ferrite nanoparticles were synthesized using a hydrothermal method. Subsequently, the addition of fumaric acid to the Cu-ferrite nanoparticles activated the F0 component, inducing MOF nucleation. As a result, the Cu-ferrite core was gradually covered with a crystalline MOF shell, forming the MOF@Cu-ferrite structure. The MOF@Cu-ferrite nanocomposite is characterized by high porosity, numerous accessible surface functional sites, good crystalline stability, low toxicity of copper, excellent water dispersion, high magnetic properties, and cost-effectiveness. This study investigates the effect of the MOF@Cu-ferrite nanocomposite on the MRI signal intensity. T2-weighted images were obtained using MRI scanner at various iron concentrations of the magnetic nanocomposite, showing a significant change in signal intensity with increasing iron concentration. The transverse relaxivity rate (r2) for different iron concentrations was found to be 504.7 mM^-1s^-1. The results showed that Cu-ferrite magnetic nanoparticles coated with MOF have significant potential as negative contrast agents in MRI, reducing T2 relaxation time and improve contrast intensity in MR images.

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Boiling is a remarkably efficient heat transfer method and is commonly used in daily life and industrial applications. Changing the physical and chemical structure of hot surface in some methods as making a porosity in a manner of enhancing boiling process is an interesting topic in recent decay. In this paper, porous metal micro/nano structural surfaces is produced in order to augmentation of boiling heat transfer on copper surface by the one- and two-stage electrodeposition method. The pictures in micro and nanoscale are captured to identification of structure and surface characteristics as porosity and capillarity are estimated. Next, the effects of structures in enhancing the pool boiling are measured experimentally. So then, boiling heat transfer profiles that demonstrate heat flux versus wall superheat, are derived for water fluid. Pool boiling curves of enhanced surfaces is compared with polished surface and results of other researchers to determine the efficiency improvement. Furthermore, comparison the effect of electrodeposition process time on obtained structures shows higher porosity, capillary and strength of structure with lower process time (30 sec) lead to further enhancement of pool boiling.

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Copper chlorophyllin is a water soluble pigment and has a wide application in the drink industry. The aims of the research were, first to compare single and double step extraction of chlorophyll to achieve the highest yield, second to optimize the producing of copper chlorophyll complex and finally, to study the stability of copper chlorophyllin in mint drink at room and accelerated temperatures during time. First, the chlorophyll was extracted from grass by single and double step extraction and the optimum condition was determined. The effect of Cu concentration (0-200 % w/w), pH (3-9), temperature (40-100 ۫C) and time (15-180 min) on the greenness value (a*) was optimized. After saponification of the produced copper chlorophyll, water soluble copper chlorophyllin was produced. Finally, mint drink containing copper chlorophyllin was produced and its color stability was investigated at light/dark and room and accelerated temperatures (25 and 42 ۫C) during time. The results indicated that the highest yield of chlorophyll (590 mg/100 g d.m.) was obtained by double step extraction with the solvent/solid ratio of 10:1 (ml/g). The highest a* was obtained at cu concentration of 100 % at 80 ۫C during 60 min. Mint drink containing copper chlorophyllin was  stable at different conditions of light/darkness and room and accelerated temperatures but in the drink containing commercial copper chlorophyllin, this pigment was precipitated. 
 

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Bimetallic Copper clad aluminum according to standard ASTM B566 can be used in telecommunication networks and signal transmission. The quality of this product in terms of bonded layer’s, in reference standard is important. The interlayer pressure affected during the drawing process on the quality of bonded layer’s. Sample of Bimetallic wire in 9.5 mm diameters was produced by Copper clad with thickness of 0.45 mm. Bimetal wire formed by wire drawing process with 6.2% reduction in area. In this study the effect of tow parameters of wire drawing process: semi die angle and reduction of area on interlayer pressure using ANSYS 17 for simulation is examined. .By comparing the force-displacement curve in experimental and modeling works, simulation accuracy was good. During the investigation it was found always with reduce reduction of area, percent of the maximum interlayer pressure depend on semi die angle. So that by increases of reduction in area for 5 degrees semi die angle, interlayer pressure does not change. But, for 45 degrees semi die angle the worst effect of reduction in area changes in interlayer pressure is sudden. The pressure changes with increased the semi die angle, depends on the reduction of area. So that the maximum interlayer pressure in 6.2% reduction in area is decreased with increases of semi die angle between 5 to 45 degrees; But, the interlayer pressure in 20% reduction in area, increases with increasing the semi die angle.

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In the present study, the mechanical and microstructural properties of dissimilar joint of 304 austenite stainless steel and C70600-copper-nickel alloy made by Gas Tungsten Arc Welding process has been investigated. The aim of this joint is using the twin metallurgical properties such as; heat dissipation and corrosion resistance of copper-nickel alloy and mechanical properties of 304 austenite stainless steel alloy. Welding of two dissimilar metal steel to copper-nickel alloy due to differences in melting point, the difference in thermal conductivity, rapid solidification of copper nickel are facing many problems. In this research due to solubility and weldability of nickel with two both alloys, three filler metals Inconel 625, Inconel 82 and 61 were used. According to microstructural investigations welds made by Inconel 625 and Inconel 82 show a finer equiaxed dendrite structure as compare as in Inconel 61 filler metal. The tensile strength of samples welded by Inconel 625, 82 and 61 filler metals was 324, 323 and 293 MPa, while the elongation percent of three samples show small difference. According to mechanical properties of joints, the Inconel 625 and 82 filler metal are appropriate for dissimilar welding 304 austenite stainless steel and C70600-copper-nickel alloy.

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Due to the fact that the use of biodegradable films helps to protect the environment, in this study, the physical, mechanical, antioxidant and thermal properties of polylactic acid films containing polypyrrole, ‌ polyaniline and copper oxide were investigated. The results showed that due to the addition of oxidant nanoparticles, the thickness of the films increased and their water vapor permeability decreased significantly. The solubility of the films also decreased significantly with increasing the amount of copper oxide nanoparticles. The resulting films showed less flexibility due to the addition of polyaniline and polypyrrole, while their resistance to failure showed a relative increase. Antioxidant activity of polylactic acid films containing polypyrrole / CuO and polyaniline / CuO showed a significant increase compared to pure polylactic acid (p<0.05). Pure polylactic acid film did not show any electrical conductivity, If the addition of polypyrrole and polyaniline increased the electrical conductivity of the films, the copper oxide nanoparticles also had no significant effect on the electrical conductivity. These films can be used as biosensors in food packaging due to their conductivity and suitable thermal, mechanical and water vapor permeability properties.

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The most important application of nanotechnology in the food industry is the production of active packaging with antimicrobial properties, packaging with special mechanical properties in terms of gas and heat exchange and nanosensors in intelligent packaging. The aim of this study was to investigate the antimicrobial effect of silver and copper nanocomposites on Escherichia coli and Staphylococcus aureus. Nanocomposites containing silver and copper nanoparticles in 1, 3, 5 and 7% percentages were produced by extrusion method and were subjected to nanometric analysis. Then, the antimicrobial test of nanocomposites was performed on commercial strains of Staphylococcus aureus and Escherichia coli by measuring the inhibition of growth in the culture medium.  The data showed that the size of copper and silver nanoparticles was in the range of 20 to 50 nm and the dispersion of nanoparticles on the surface of nanocomposites was uniform with high purity. Antimicrobial test of nanocomposites showed that with increasing the percentage of nanoparticles, the diameter of the growth inhibition of nanocomposites increased significantly and the rate of inhibition of growth of silver nanoparticles was higher than copper (p≤0.05).  Staphylococcus aureus was more sensitive to copper and silver nanoparticles than Escherichia coli (p≤0.05). The results of the present study showed that silver and copper nanocomposites with high antimicrobial properties can be used for food packaging.