khajavi

The present study was conducted to evaluate the effect of fish meal replacement with single cell protein on growth performance and proteolytic enzymes activity of pepsin, trypsin and alkaline protease in rainbow trout (Oncorhynchus mykiss) fry (weight: 2.51±0.55g) for 6 weeks. Five experimental diets were prepared with replacement levels of 0 (A), with 25% (B), 50% (C), 75% (D) and 100% (E) of fish meal with microbial protein as isonitrogenous and isoenergetic. Parameters of body weight gain, relative growth rate, protein, lipid and feed efficiency ratio in diet C were significantly the higher than other treatments (p<0.05), while feed conversion ratio was shown the highest and the lowest values in diet C and E, respectively , with a significant difference than those from other treatments (p<0.05). The survival rate was 100 % in the diets. The highest activity of trypsin and alkaline protease enzymes from pyloric caeca and intestine was observed in diet C, which showed a significant difference compared to D and E diets (p<0.05). Also, pepsin had significantly the highest activity in C diet than that from other diets exception for B diet (p<0.05). The findings of growth performance and pepsin, trypsin and alkaline protease activity were revealed the diet containing 50% single cell protein could be appropriate for rainbow trout growth.

Aims: Monthly breast self-examination (BSE) is one method for early detection of breast cancer. The aim of this study was to determine the effect of educational intervention based on the theory of planned behavior in promoting BSE of women in Gonabad, IRAN.
In this clinical trial study, 140 married women aged 20–49 years from Gonabad were chosen randomly and divided into control and experimental groups. Educational needs were determined and the curriculum was developed and presented in 5 sessions. BSE behavior was studied using the constructs of planned behavior theory before, immediately and 3 months after training. Data were analyzed by SPSS version 20, using ANOVA, T-test student, Chi-square and multivariate analysis of variance and significant level was set at α=05.0
Findings: The mean age of the subjects was 37.27 ± 6.69 years. After intervention, the average score of BSE skill increased from 17.89 to 18.26 and the mean scores of theoretical constructs in the intervention group increased significantly (P0.05).
This study showed that educational intervention based on the theory of planned behavior was effective in promoting BSE behaviors. Therefore, it is recommended that educational interventions to be designed specifically for and consistent with the constructs of the theory of planned behavior.

Public hospitals play a great role in people’s health maintenance. One of the major concerns of these centers is constant high quality activities alongside allocating resources efficiently. Meanwhile, examining the performance and studying the procedures and design of management accounting are required to achieve this purpose. It is a descriptive-survey research.The statistical population included financial and administrative personnel of public hospitals (n=25) in Gilan province and 138 people were selected through Cochran formula as the sample. The questionnaires were distributed among the sample to test management accounting design, management accounting application, management accounting satisfaction, and hospitals performance. Research hypotheses testing was done by structural equations modeling. The results indicate that there is a positive significant and direct relationship between management accounting design and application, management accounting design and satisfaction as well as management accounting application and organizational performance. Further, management accounting design develops a significant and indirect relationship with organizational performance through management accounting application. According to the properties of Gilan public hospitals a revision of the dimensions of their management accounting system is required with the purpose of undertaking their duties

Restriction of using antibiotics in human and animal brought an increasing application of effective biological compounds in this regards. In present research¡ to investigate the effects of Chevillpowder on microflora and immune response of femalebroiler chicken¡ a total of 476 commercial broilers (Cobb strain) randomly assigned to 7 treatments¡ each with four replicates in a way that each replication contained 17chicks. Birds fed the same basal diets treatment with 0%(control)¡ 0.4 and 0.8%Chevillpowder in days 1 to 28¡ 29to 42and 1 to 42. For evaluating the immune system response in the days 28and 35¡ we injected sheep’s red blood cells (SRBC) into wing vein of two birds at each replicate. To measure the carcass weight¡ fat weight¡ triglycerides¡ cholesterol¡ HDL and VLDL¡ two birds were killed in each replication. The highest average of daily gain observed in the control group and the lowest one was seen in 0. 8 percent Chevill. Lactobacilluscount significantly increased in 0.4%or 0.8%Chevilltreatments¡ but E. coliwas decreased significantly on day 28of age (p

Abstract Growth of algae and seaweed via creation of bio films or bio fouling on the surfaces leads to different problems. Different methods have been used for controlling the bio fouling so knowing and evaluation of these methods and assessment and analyzing of their benefits and disadvantages are necessary. In this article, different anti fouling coatings containing nontoxic biocides and also coatings containing nano materials, have been studied and a prospective about the using of these materials in the future have been presented.

This paper presents a new design for a microstrip dual-band band-pass Microstrip filter (BPF) with suitable isolation between two passbands. In this design, a basic structure is used to achieve a desirable frequency characteristic in the passband. In this regard, Defected Ground Structure (DGS) is implemented to reach optimum parameters of the filter such as bandwidth, return loss, insertion loss. The special features of the filter are the compact size, dual-band design and suitable isolation between two passbands. Variation of the filter characteristics is compared in a table before and after applying DGS. Simulation results are at frequency of 4.84GHz and 3.8GHz. Return loss of -20dB and - 25dB and insertion loss of -0.5dB and -0.9dB are the results of the mentioned frequency, respectively. Also the bandwidth of 87 MHz is achieved for both simulation frequencies. Simulation results are well-matched to the characteristics of the fabricated filter.

In order to investigate the effects of probiotic, prebiotic and a mixture of these feed additives (at different ratio) on the performance, immunity response and cecal microflora of broiler chickens, in a complete random design, a total of 360 ond-day-old broiler chicks (Cobb 500) were randomly distributed among 6 experimental treatments with four replicates. Experimental treatments (diets) were: 1- a basal diet without any additive, as control (Ctrl) 2- basal diet added with prebiotic (Pre) 3- basal diet added with probiotic (Pro) 4- basal diet added with a mixture of probiotic and prebiotic at ratio of 1:1 (M1), 5- basal diet added with a mixture of probiotic and prebiotic at ratio of 2:1 (M2), 6- basal diet added with a mixture of probiotic and prebiotic at ratio of 1:2 (M3). Probiotic and prebiotic were added to diets in amounts as recommended by producer. During 42 d rearing period, birds were fed starter and grower diets form 1 to 21 and 22 to 42 days of age, respectively. Performance traits were measured weekly. On d 21 and 42, one bird from each replicate pen, was slaughtered and cecal content was collected, under sterile condition, to determine the E. coli and Lactobacillus count. In addition, immunity respose to SRBC was measured at the end of the experiment. Data were subjected to one way analysis of variance, by SAS sotware. The results indicated that in the starter phase, birds fed diets M1 or M3 achieved more gain compared to the control group (P

Introduction and Falls and fear of falling are elderly outcomes and are of main health-related problems in older adults. Purpose of this research was to compare health-related quality of life and functional fitness of older adults with and without fear of falling and fall history.
Research method was descriptive and population were men older adults living in Arak that 91 subjects eligible participate in the study voluntarily. Variables measured with SF-36, Activities-specific Balance Confidence Scale, Senior Functional Fitness Battery, MMSE, and Fall frequency. Data analyzed with independent t-student and with SPSS-16 software.
Findings: The results indicated that about 32% and 27% of subjects had fear of falling and fall history, respectively. Mean scores of subjects in without fear of falling group than with fear of falling counterparts in all subscales of quality of life and functional fitness(exception of flexibility) was higher significantly (p≤ .05). Mean scores of subjects in without fall history group than with fall history group in subscales of quality of life and functional fitness (exception of flexibility) was better significantly (p≤ .05).
Fear of falling and fall history results in avoidance of daily living activities and this activities avoidance may cause functional fitness decline and in results decline in older adult's quality of life and health.

One of the immediate consequences of stresses is occupational burnout and increasing turnover intention. The extent and prevalence of stress and burnout are increasing in Accounting. Regarding Accounting's important role in the economic growth, this research investigates the Causal Model of role ambiguity and role conflict, occupational stress, occupational burnout and turnover intension of accountants, auditors and academic professors in the field of accounting.
This research is of a descriptive-correlational type. The statistical population of the research contain 190 accountants, auditors and academic professors in 2016. The instrument for collecting data is questionnaire, andin order to analyze data,Path Quality Analysis has been used.
The results of the research show that role ambiguity has a direct negative and significant effect on both components of occupational burnout (emotional exhaustion, depersonalization), but it has a direct positive and significant effect on the decrease of personal fulfillment. Role conflict has a direct positive and significant effect only on the emotional exhaustion. Regarding the indirect effects, the effect of role ambiguity on turnover intension is negative and significant, and the effect of role conflict on turnover intension is positive and significant so that this issue suggests the effective mediating role of endogenous variables among role ambiguity, role conflict, and turnover intension.
According to the important function of role conflict and role ambiguity in the formation of endogenous variables of this research, especially the final variable; i. e., turnover intension, the effective factors on these variables should be identified in order to achieve the main objective (reducing the level of turnover intension) more simply. Therefore, by providing an appropriate environment and without stress and occupational pressure, this goal can be achieved.

On the basis of Pecking Order Theory, when firms need resources they usually rely on debts since capital is considered expensive due to information asymmetry. Moral hazard is a kind of information asymmetry; therefore, it is expected that it has relationship with capital structure. The purpose of this study is to investigate the impact of moral hazard on capital structure. In order to conduct the research 132 firms were selected from listed firms in Tehran Stock Exchange between years 2006_2012.research hypothesis was tested using structural equation model. The results show that moral hazard has significant negative impact on capital structure, and the negative effect of moral hazard on capital structure is moderated by control variables.

Introduction and Balance is an index to determine the level of independency of elderly in their daily activities.The present study, aimed at determining the validity and reliability of "dynamic gaiting index (DGI)" in elderly women. This Methodology research was conducted on 80 elderlyin Dehdashtsubjects in the age range of 60 and over. The subjects selected.. The data were analyzed using Exploratory Factor Analysis, main component analysis with Varimax rotation tests, Spearman’s correlation coefficient, Cronbach’s Alpha, and U-Man-Withney.The results indicated that the Persian version of DGI among older adults is consisted of one factor. The specific value of the factor was 6.901 which predicted 86.262 percent of variance.Cronbach’s Alpha was calculated 0.890. Inter-rater reliability shows that the correlation between grades twice collected by the two raters, was significant and high (p˂0/0001, r=0/714). The test-retest correlation, was significant and high(p˂0/0001, r=0/876). The results showed that the Persian version of dynamic gait index in the elderly is also acceptable level consistent with the English version and can be used in clinical, therapeutic and research use to identify seniors at risk of falling.

In this study, it was aimed to investigate the super-hydrophobicity and conductivity properties of cotton fabrics coated with polypyrrole (PPy) through admicellar polymerization (AP) process and modified with alkyl silanes. Firstly, samples of cotton fabric were coated with PPy through AP process and also some samples were coated in the same condition without using sodium dodecyl sulfate (SDS) surfactant and then they were modified with HDTMS. Finally, their super-hydrophobicity and surface resistivity were studied and compared with each other. The samples were characterized by attenuated total reflectance FTIR spectroscopy. Their morphology and surface roughness were investigated by SEM and AFM respectively. Conductivity and hydrophobicity were also assessed by a standard two probe method and static and dynamic water contact angle measurements, respectively. Infrared spectroscopy and SEM images confirmed the existence of PPy on the treated samples. The agglomeration of PPy particles was more obvious on the surface of pristine sample. However, a uniform distribution of PPy films was observed for the admicellar polymerized cotton samples. After treating with HDTMS, the CA value for pristine sample was 115˚. But, it was reached to 153˚ for admicellar polymerized samples and their roughness increased up to up to 341%. It was concluded that AP process can be applied for fabrication a PPy layer on the rough and hydrophilic surface like cotton and consequently, it can be used for achieving to modified conductivity and superhydrophobicity properties.

Along with the developments of countries and regarding the human rights, over the normal responsibility of corporates; i. e. profitability, the responsibility of corporates against the society and the environment has been taken into consideration. Shareholders are not the only beneficiaries of the companies anymore. Now, a lot of companies all over the world are aware of their responsibilities, and they are attempting to play their own role in this respect. Social reporting responsibilities is an instrument for evaluating the corporates social responsibility, and via this, the companies are able to pronounce their own activities to the whole society for the enhancement of the quality of lives for all people of the society and the interested institutions.Literature Review: In this research, it is tried to state the reasons, motivations, and the interests in inclining to the implementation and reporting of the corporate social responsibility by using the existent theories in this field. Moreover, it is attempted to set forth some deficiencies of the traditional reporting in financial accounting, present the resulted advancements in social and environmental reporting, and at last, suggest the appropriate framework for developing methods in social responsibilities reporting. According to the conducted researches in this field, and regarding the investigating of some models, it seems that the necessary obligations and incentives should be compiled and presented for reporting the social responsibilities in performing this type of reporting.

Ackerman (1988) states intelligence and motor ability as the two important abilities in three learning stages (cognitive, motor and autonomic) of Fitts and Posner. Therefore, the present study aims at investigating the relationship between Intelligence Quotient (IQ), motor fitness and anthropometric characteristics with basic basketball skills learning stages. The population includes all seven-to-eleven-year-old boys of Aleshtar city, 1054, 60 of whom were selected using random cluster sampling method. Data collection tools included Rion’s IQ inventory, standard tests of motor fitness, and basketball skill tests of Ifred. Statistical analysis was conducted using Pearson correlation coefficient and linear regression. Correlation between IQ and performance basic skills of basketball in cognitive stage of learning was significant and its peak. This correlation in motor and autonomic stages was also significant but decreased. On the other hand, the correlation of motor fitness and anthropometric characteristics with performance basic skills of basketball was low but still significant in cognitive and motor stages. This correlation reached its peak in autonomic stage. Motor fitness and anthropometric characteristics are more important in autonomic stage and IQ is more important in motor fitness in cognitive stages of learning shooting, passing and dribbling skills in basketball.

The purpose of this study was to examine the relationship between skill performance, mental preparation and collective efficacy in football players. The statistical sample of the study included 80 male soccer players selected randomly from Arak city football teams. Data were collected using the following skill tests: preserving the ball in the air, dribbling test, run sweep with the ball and targeting test, the Ottawa mental skills questionnaire and collective efficacy questionnaire in sports. Then data were analyzed by SPSS 16 software using the statistical tests of Pearson correlation coefficient and simple linear regression. The results of the study showed that there was a significant positive relation between skill performance, mental preparation and collective efficacy. Collective efficacy was also positively correlated with the age, championship background, sports background and team membership history. Moreover, results showed that both predictive variables including skill performance and mental preparation are appropriate predictors of collective efficacy.

Background Satisfaction evaluation is a good way to assess hospital conditions. In Health Care System, parentscan be also as children''s main supporters, thus they may act as patient''s viewpoints'' representatives.This study aimed to evaluate mother’s satisfaction of hospital care in hematology – oncology ward in Dr Sheikh hospital. Materials and Methods A Cross-sectional descriptive analytic study was conducted using Pediatric Family Satisfaction (PFS) questionnaire and interviewing with 164 mothers duringMarchto February2013. The obtained data were analyzed using SPSS -16 software and descriptive statistics. Results The mean age of mothers and children was31.2±5.8, and 7.95 4/66 years.The children were 64 % male and 36 % femael. A large number of mothers (%56 (describedtheir satisfaction about medical care as moderate,(%70.7) reported their satisfaction about nursing care at very high level and(36.5 %) reported satisfaction about welfare services at high level(59%)and describe overall satisfaction at very high level. The totals mean of mothers’ satisfaction ratewas 121.8 ± 10.8. The mean of medical care, nursing care, welfare services was 2.9±34.1,4.6±50 and4.8± 32.9 respectively. Conclusion Overall satisfaction with medical, nursing and welfare staff was acceptable. For more satisfaction, it is widely recommended to improve veinipuncture by nurses, Physicians should inform parents about the tests results, and finally disturbance in ward with noise should be controled.

The purpose of this study was to compare effect of 4 weeks of strength training in two ways of accommodation and constant resistant methods on maximum strength and power of trained athletes. Sixteen Wushu athletes and wrestlers chosen from Tehran’s clubs with a mean age of 20.50 ±2.00years, height 174.34 ± 6.53cm, weight 70.22 ± 10.50 Kg, and body fat percent, 12.87 ±. 4. 23 participated in this study. After the initial testing of the variables of maximum strength (1RM), upper body power (medicine ball to throw, cm) lower body power (vertical jump, watt) Body fat percent (Skin Fold three point), limb circumference (cm) and Weight (kg), divided in two equal groups. Each group has done resistance strength training program for 4 weeks, three sessions per week, with 85% of their 1RM, with three sets and 5 repetitions with Squat and bench press exercises. But in case of accommodation group, 20% of their 1RM was used by chain through the full range of motion. At the end of the training, re-test of dependent variables were performed under similar conditions. Covariance analysis was used to compare the progressof power and strength between the two groups. This study showed that weight (p=0.391), limb circumferences (P=143), fat (P=0.413), the upper body power (P=0.267), lower body power (P=0.252) and the maximum upper body strength (P=0. 803) there was no significant difference between groups, but in case of maximum strength of lower body (P=0.04) there was significant difference between the two groups. In analyzing the results, although most variables did not show significant difference, but the effects sizeanalyzing of groups showed that in upper body power (ES=0.62), lower body power (ES= 0.64),upper body strength (ES=0.13)and lower body strength (ES=1.84), the results were in favor of accommodation group. This difference in the maximal strength in accommodation group were (62.15% in the upper body, 68.38% lower body) and in constant strength group (86.14% in the upper body, 84.21% in the lower body) respectively. Also the effect size of power for accommodation group were (97.6% upper body, 61.6% lower body) and in constant group (16.4% upper body, 67.4% lower body), respectively. This study showed that in order to increase maximal strength and power, accommodation training method is more effective than traditional constant training.

This study examined an innovative approach for imparting multi-functional properties, i.e., selfcleaning, electrical conductivity, UV blocking as well as antimicrobial properties onto cotton fabric. Graphene oxide (GO) and commercial titanium dioxide photocatalyst (P25) were used to prepare the nanocomposite. GO/TiO2 nanocomposites were successfully prepared, by a simple method of mixing and sonication, and used for multi-functional treatment of cotton fabrics. The role of both titanium dioxide and GO concentrations on the various properties of the fabric was investigated. The morphologies of GO and GO/TiO2 nanocomposite were investigated by TEM. Furthermore, the structure and morphology of fabric surface has been examined by field emission SEM and its chemical structure has been elucidated by XPS. Microscopic analyses of the nanocomposite revealed that TiO2 particles with average particle size of ∼21 nm are attached to the surface of GO. The treated cotton fabrics with GO/TiO2 nanocomposite showed excellent photocatalytic self-cleaning activity measured by degradation of methylene blue in aqueous solution under sunlight irradiation. The antimicrobial activity of finished fabrics was assessed through the calculation of bacterial reduction against E. coli and S. aureus bacteria, which suggested that the GO/TiO2 nanocomposite can function effectively as antimicrobial agents. Results showed that the electrical conductivity of the graphene oxide/titanium dioxide nanocomposite-coated fabrics was improved significantly after sunlight irradiation, which demonstrated the photocatalytic reduction of GO sheets by titanium dioxide. Moreover, the nanocomposite finished cotton fabric demonstrated proper UV blocking activity.

The study examined correlation between balance-and-fall-related psychological and functional measures of men older adults after a combined training program. Sample include 31 healthy older adults over 60-year assigned randomly to intervention (mean age=66. 08±4. 39) or control groups (mean age=70. 14±7. 33) that 2 subjects dropped out from each group. Variables measured by 30-s Chair- Stand Test، Seat and Reach، Up and Go، ABC، FES-I. Data was analyzed by tstudent، Percent change، Pearson Correlation Coefficient، and Effect Size. Mean scores of lower extremity strength، flexibility، agility and dynamic balance، speed، static balance، fear of falling، and balance confidence improved significantly in intervention group than control group (p<0. 05). Effect of the intervention program on functional and psychological measures was not equal. Largest effect size observed in lower extremity strength، balance confidence، and static balance، respectively. The smallest effect size was observed in flexibility، fear of falling، and agility/dynamic balance. Change in lower extremity strength was significantly correlated with changed in speed (-0. 66) and change in flexibility was correlated with change in agility and speed significantly. But not significant correlations observed between functional and psychological measures changes (p≤0. 05). Correlation between changes in fear of falling and balance confidence was significant (r=-0. 66، p≤0. 05). The training program with education program was effective to improve balance-and-fall-related psychological and functional measures in men older adults.

Paraquat (PQ) is a herbicide and exerts its cytotoxicity via the generation of reactive oxygen species (ROS). There is no specific treatment for PQ poisoning. The purpose of this study was to investigate of hydroalcoholic extract Matricaria chamomilla L. (M. chamomilla) ‎‏‏against PQ-induced injury in association with its antioxidant activity. The male rats were treated by gastric gavage daily with PQ (5 mg/kg/day) and M. chamomilla (50 mg/kg/day) were administered alone or in combination for 7 days. After treatments, in blood sample, lipid peroxidation (LPO), total antioxidant capacity (TAC), the activity of glutathione peroxidase (GPx) and superoxide dismutase (SOD) were measured. In this sample, the TAC was lower in the PQ group as compared with control group. PQ increased LPO level, GPx and SOD activities compared control group M. chamomilla extract increased TAC and decreased LPO level, GPx and SOD activities compared PQ group. Co-administration of PQ with M. chamomilla extract increased TAC and decreased GPx and SOD activities as compared with PQ group. In conclusion, M. chamomilla ‎as natural antioxidant may be considered beneficial for the protection oxidative damage in PQ poisoning.

Nowadays, Fault detection of rotating machinery by diagnosing sings of starting point and growth of defect using intelligent techniques, discovering the defected parts and the reason behind them and prediction of remaining working life of the machine play an important role in preserve the machine from severe defects and the high price of repairing it. The goal of this paper is using the Adaptive Neural - Fuzzy Inference Systems (ANFIS) and Multi-Layer Perceptron (MLP)for detecting the original defects in rotating machinesincluding unbalancing, Bearing defects, Looseness and misalignment. So,in this study addition to the creation of this mechanism for automatic fault diagnosis, improve accuracy and speed of the network was also performed.Therefore, using the Principal Component Analysis (PCA), the input matrix was reduced to acceptable amontand the effectiveness of the ANFIS and MLP networks in detection of defects were compared with each other.To achieve this goal, mentioned networks were trained using feature vectors extracted from the spectrum frequency and waves.The obtained results showed that for 84 final measurements, the ANFIS and MLP networks have 91 and 78 averages percent successful in detecting the defects, respectively.

For the nonlinear analysis of structures using the well known Newton-Raphson Method, the tangent stiffness matrices of the elements must be constructed in each iteration. Due to the high expense required to find the exact tangent stiffness matrices, researchers have developed novel innovations into the Newton-Raphson method to reduce the cost and time required by the analysis. In this paper, a new approach is suggested to generate the tangent stiffness matrix numerically from internal forces for the materially nonlinear analysis of structures. The method is organized at the element level and, as is verified by numerical experiments, affords good stability and preserves the convergence rate near that of the original exact Newton-Raphson version. To implement the method, an appropriate configuration is first sought for the stiffness matrix of the finite element, which satisfies the element equilibrium requirement; then, the entries of this matrix template are generated from the generalized internal forces of the element by the numerical method of finite differences. The method is applied to construct the stiffness matrix of the plane frame element, which will be used in the analysis of some sample frame structures with materially nonlinear behavior, under monotonic static loading.

The control of car following is essential due to its safety and its operational efficiency. For this purpose, this paper builds a model of car following behavior based on ARMAX structure from a real traffic dataset and design a Model Predictive Control (MPC) system. Based on the relative distance and relative acceleration of each instant, the MPC predicts the future behavior of the leader vehicle and according to this behavior, the acceleration of the follower vehicle is controlled. Validation of the presented controller is done by comparing the behavior of the controller with the human drivers. Results show that the MPC controller has a behavior much safer than that of real drivers and it can provide a pleasant trip for passengers.

In company’s bankruptcy, stockholders, creditors and other stakeholders incurred lose and got affected. Thus, before any decisions, it is necessary to consider whether there is any signs of bankruptcy. In this research, after recognition of influencing variables on companies’ bankruptcy, quantitative variables were extracted from bankrupt companies’ financial statements and a questionnaire was used to measure these quantitative variables importance level. Afterwards, we ranked recognized factors using TOPSIS_AHP technique. After recognition and ranking efficient variables in bankruptcy, it was revealed that the most important factor of bankruptcy is the lack of market understanding. The ratio of total debts to total assets and managers attitudes were recognized as other key factors in bankruptcy.

Polyamide nanofibers (nylon 6) were fabricated as core-shell structures with enriched silver nanoparticles in their shells. The main purpose of this study was to produce nanofibers with reduced silver nanoparticles content while maintaining or enhancing their antibacterial effectiveness. The coaxial electrospinning was used to fabricate the nanofibers. The core-shell solutions consisted of polyamide (caprolactam) in formic acid or acetic acid and adding silver nanoparticles into the solutions. The morphology of samples was characterized by scanning electron microscope (SEM) and the AATCC100 standard test method was used to determine the antibacterial properties of the fibers. EDAX was used to test the presence of silver nanoparticles in the samples. Finally، the new fibers'' antibacterial quality was tested on Gram (-) bacteria E. Coli and Gram (+) bacteria S. Aureus. The results showed that the core-shell nanofibers were successfully produced with uniform concentration of silver nanofibers in their shells and displayed the same degree of antibacterial activity as samples with uniform distribution of nanoparticles in both the core as well as the shell structures.