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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Nanomedicine Journal
- نوع مقاله: Journal Article
- کلمات کلیدی: Antibacterial activity,Biosynthesis,selenium nanoparticles,Nanobiotechnology
- چکیده:
- چکیده انگلیسی: Objective(s): This study deals with mycosynthesis and characterization of selenium nanoparticles (SeNPs) using the Penicillium chrysogenum PTCC 5031 and evaluating their antibacterial activity.
Materials and Methods: The formation of SeNPs was confirmed with the color change from pale yellow to orange. Tyndall effect also confirmed the formation of colloidal systems through the samples. The SeNPs were characterized using different analytical techniques including photon correlation spectroscopy (PCS), Scanning Electron Microscope (SEM), Atomic Force Microscope (AFM), Energy Dispersive X-ray (EDX), X-ray diffraction (XRD) and Fourier Transform Infrared (FT-IR) analysis.
Results: Our findings revealed that SeNPs were fairly uniformed with good monodispersity and the lesser aggregation of particles in pH value of 7 with the average hydrodynamic size of 24.65 nm, polydispersity index (PdI) of 0.392 and zeta potential of -34 mV. The SeNPs revealed antibacterial activity against gram positive bacteria including Staphylococcus aureus, and Listeria monocytogenes with the zone of inhibition (ZOI) of 10 and 13 mm, respectively.
Conclusion: The results of this study provided a potential solution to the growing need for the development of cost-effective and eco-friendly ways of nanoparticle synthesis to overcome the microbial resistance and control the infectious diseases. However, further investigations are required to demonstrate the efficacy of SeNPs through in vivo models.- انتشار مقاله: 02-07-1399
- نویسندگان: Hossein Vahidi,Farzad Kobarfard,Zahra Kosar,Mohammad Ali Mahjoub,Muthupandian Saravanan,Hamed Barabadi
- مشاهده
- جایگاه : پژوهشی
- مجله: Nanomedicine Journal
- نوع مقاله: Journal Article
- کلمات کلیدی: silver nanoparticles,anticancer activity,nanotoxicity,Hepatic Cancer
- چکیده:
- چکیده انگلیسی: Nanoparticles are of highlighted interest in scientific research for a wide range of applications as they bridge the gap between atomic structures and bulk materials with unique physicochemical properties. This systematic review was aimed to study the current trends in biological mediated cancer research using biogenic silver nanoparticles (AgNPs) against hepatic cancer cell lines. For this purpose, the electronic databases including Cochrane Library, PubMed, Scopus, Science Direct, ProQuest, Embase, and Web of Science were searched. Forty-six studies passed the eligibility assessments and entered into the current study. All of the studies stated the size distribution of biosynthesized AgNPs below 100 nm with different shapes. Whereas, most studies stated spherical morphology for biogenic AgNPs. Most of the studies (91.30%) represented significant anticancer activity of biogenic AgNPs toward hepatic cancer cell lines. The molecular mechanisms also showed the induction of intracellular Reactive Oxygen Species (ROS) and apoptosis through the biogenic AgNPs-treated hepatic cancer cells. The AgNPs-mediated induction of intracellular ROS overgeneration and ATP synthesis interruption disturb the mitochondria respiratory chain function resulting in the induction of mitochondrial pathway apoptosis. Overall, this systematic review provided strong preliminary evidence representing the efficacy of biogenic AgNPs to combat hepatic cancer cells through in vitro models.
- انتشار مقاله: 25-05-1399
- نویسندگان: Hamed Barabadi,Hossein Vahidi,Masoumeh Rashedi,Mohammad Ali Mahjoub,Anima Nanda,Muthupandian Saravanan
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Applied Research in Water and Wastewater
- نوع مقاله: Journal Article
- کلمات کلیدی: partnership model,Ratio – trade system Ant Colony Optimization Theory of cooperative game
- چکیده:
- چکیده انگلیسی: One of the main problems in the quality control of rivers is the high control cost imposed upon pollutant units. The cooperative policy approach in the treatment process between two or more pollutant units is a new and economic perspective in the environmental management of catchment basins. Origins of large amounts pollutants which require a high cost to control pollution are trying to start partnerships with smaller units in establishing joint refineries in order to reduce their own and the whole system's costs. In this study, considering the one way direction of the river's water, the Streeter – Phelps equations were used to simulate the river. The Ant Colony Optimization was used as an efficiency model in order to acquire the best scenario of cooperation based on the maximum elimination of pollution and reduction of treatment costs without straying from the river's quality standards. Also the ratio – trade system was used for commercial purposes. After this the cost of the depleting units was split evenly between them using the cooperative game theory. The efficiency of the model was evaluated by qualitative and quantitative analysis of the Zarjub River in Gilan province of Iran. Three main scenarios were taken to mind for cooperative trading to take place. Carrying out the trade – partnership model could play positively large role in sufficing the quality the control of river water.
- انتشار مقاله: 25-11-1392
- نویسندگان: Seyed Masoud Tayefeh Cheraghali,Amin Sarang,Mohammad Ali Zahed,Hossein Vahidi,Moazameh Akbari
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Pharmaceutical Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Polymerase Chain Reaction,DNA extraction,maize,Detection,Key words: GMO
- چکیده:
- چکیده انگلیسی: Detection of genetically modified organisms (GMOs) in food is an important issue for all the subjects involved in food control and customer’s right. Due to the increasing number of GMOs imported to Iran during the past few years, it has become necessary to screen the products in order to determine the identity of the consumed daily foodstuffs. In this study, following extraction of genomic DNA from processed foods sold commercially in Iran, qualitative PCR was performed to detect genetically modified maize. The recombinant DNA target sequences were detected with primers highly specific for each investigated transgene such as CaMV35s gene, Bt-11, MON810 and Bt-176 separately. Based on the gel electrophoresis results, Bt-11 and MON810 events were detected in some maize samples; while in none of them Bt-176 modified gene was detected. The results demonstrate for the first time the presence of genetically modified maize in Iranian food products, reinforcing the need for the development of labeling system and valid quantitative methods in routine analyses.
- انتشار مقاله: 03-04-1391
- نویسندگان: Maryam Rabiei,Mehrangiz Mehdizadeh,Hossein Rastegar,Hossein Vahidi,Mahmoud Alebouyeh
- مشاهده
- جایگاه : پژوهشی
- مجله: Environmental Energy and Economic Research
- نوع مقاله: Journal Article
- کلمات کلیدی: environment,Fuel cell,floating photovoltaic,technical study,surface evaporation
- چکیده:
- چکیده انگلیسی: Fossil fuel consumption problems and water crisis are serious dangers. Using renewable energy is a solution to reduce fossil fuel consumption. Photovoltaic is a renewable energy generation method which is abundantly used all over the world. By installation of solar panels on the surface of water, the efficiency of panels increases and in addition, the surface evaporation of water will be reduced. Dams are one of the main sources of water. In the present study, installation of solar panel on surface of the Tanguie dam is studied from technical point of view. The generation PV power is used to produce hydrogen by electrolysis process and consume it in PEM Fuel cell to decreases the peak load. Results show 2.6% increase in panel efficiency when they are installed on water. And this increase in efficiency causes that 360780 installed panels generate 4 million kWh additional electricity power in the year. As well as, covering 678628 m2 of dam with these panels prevent from 1.97 million m3 water evaporation in the year. Also, the generated PV power could supply about 99% of load which is above 90MW.
- انتشار مقاله: 31-04-1398
- نویسندگان: Saber Sadeghi,Hossein Vahidi
- مشاهده
- جایگاه : پژوهشی
- مجله: Environmental Energy and Economic Research
- نوع مقاله: Journal Article
- کلمات کلیدی: LCA,OpenLCA,Municipal Waste Management,Medium Iranian City
- چکیده:
- چکیده انگلیسی: Solid waste is one of the unavoidable products of every society that necessitates the establishment of municipal solid waste management system. Because of variability in quantity and composition of municipal solid wastes, several management scenarios are considered. Assessing the environmental impacts of the life cycle of these scenarios will have a significant role in reducing and resolving urban service management problems. The aim of this study was to compare different scenarios of municipal solid waste management using life cycle assessment (LCA) approach in a typical medium cities in Iran which Sirjan city is assessed as a sample. For this purpose, four scenarios were considered and the life cycle inventory (LCI) was accomplished using integrated waste management model (IWM-2) in each scenario and the results of the model were entered to OpenLCA software and environmental impact assessment of scenarios was carried out Based on the TRACI2014 method. The results showed that the fourth scenario, in the impact categories of acidification, eutrophication, ozone layer depletion, photochemical ozone formation and respiratory effects, third scenario in the impact categories of ecosystem toxicity, human health (carcinogenicity and non-carcinogenicity) and second scenario in the impact categories of global warming and resource depletion (fossil fuels) has the least environmental burden among other scenarios.
- انتشار مقاله: 15-05-1397
- نویسندگان: Hossein Vahidi,Alireza Rastikerdar
- مشاهده
- جایگاه : پژوهشی
- مجله: Environmental Energy and Economic Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Kerman,Alternative Fuel,Municipal Waste,cement industry,Resistive economy
- چکیده:
- چکیده انگلیسی: Optimizing and decreasing the fuel consumption and as a result preserving the national financial resources are so important purposes in the resistive economic which has been becoming so vital during previous years due to the implementation of sanctions against Iran. Using the alternative fuels stemming from municipal waste and using them in the energy industry of cement can be some suitable solutions in attaining these purposes. In this study, first, all kinds of operational alternative SRFs (Standard Refinery Fuels) in Iran have been surveyed and compared with known RDFs (Refuse Derived Fuels); then, in the county of Kerman, Bardsir, and Mahan in the province of Kerman which are located in the 50-kilometer buffer of Kerman Cement Company and Momtazan Cement Company has the potentiality of SRF production from the municipal waste been assessed. According to the results, 330 tonnes of SRF by common quality are producible which this amount of alternative fuel can decrease the consumption of fossil fuels such as mazut about 30,000 tonnes in Rotary furnaces in Kerman province’s cement industry. This amount of substitution will have the great potentiality of foreign exchange savings in this region which will be very economical due to the required initial investment and noticeable due to the amount of Rials savings. The development of a conventional unit of SRF production and injection has also been surveyed economically.
- انتشار مقاله: 30-02-1396
- نویسندگان: Hossein Vahidi,Nasim Moradi,Hakime Abbaslou
- مشاهده
- جایگاه : پژوهشی
- مجله: Environmental Energy and Economic Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Solid waste,Rural waste management,Waste composition,Central regions of Iran,Rural Regions
- چکیده:
- چکیده انگلیسی: Solid waste management has been known to play an important role in public health and the environmental status of developing countries. Waste assessment can help researchers and governors in management programs and devising alternative plans in order to improve public health and economical savings. In the present study, statistical estimations regarding waste generation and type of solid wastes in central provinces of Iran has been provided. Chaharmahal and Bakhtiari and Yazd are located in central regions of Iran, with an average waste production estimated at 0.507 and 0.293 kg/ca/day, respectively. Improper solid waste management continues to be a big concern in the region, with water contamination as its main consequence. High amount of putrescible material ratio showed the capability of bio-fuel generation in rural areas. The results of survey conducted among waste management experts showed that waste separation prior to collection is recommended as the most efficient method for managing waste collection in the area. This study could contribute to the body of knowledge enhancement by proposing a set of practical waste management strategies that would be beneficial in rural areas.
- انتشار مقاله: 02-04-1396
- نویسندگان: Hossein Vahidi,Hossein Nematollahi,Amin Padash,Benyamin Sadeghi,Morteza RiyaziNejad
- مشاهده
- جایگاه : پژوهشی
- مجله: Environmental Energy and Economic Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Iran,Desalination,Economic Evaluation,RO & MEH,COMFAR
- چکیده:
- چکیده انگلیسی: The primary objective of desalination research is the development of a way to produce fresh water at lower cost. The present study investigated two freshwater production methods of Reverse Osmosis (RO) and Multi-Effect Humidification (MEH) (artificial distillation), and analyzed them from an economic standpoint, and subsequently pointed out the important and effective factors in decreasing saltwater desalination expenditure for each one of the mentioned units. Different aspects of these units were investigated as well. However, all the prices are assumed with the current condition and expenses in Sistan Baluchestan province, Iran. The results from economic analyses, obtained employing COMFAR III, showed that, in regions where locals have access to local grid, application of RO unit has no economic justification, while MEH units, powered by solar energy, are more economic in remote regions receiving adequate solar irradiation. However, the water produced by RO can be purchased at 0.02 $/lit, and by solar MEH unit (Respect to introduced characterization), at 0.032 $/lit. Although, the sensitive analysis of IRRs’ variation in proportion to three factors namely sales income, fixed capital expenditure and operational expenditure were conducted.
- انتشار مقاله: 09-03-1396
- نویسندگان: Hassan Hoveidi,Hossein Vahidi,Seyed Masoud Tayefeh CheraghAli,Alireza Aslemand
- مشاهده
- جایگاه : پژوهشی
- مجله: Advances in Environmental Technology
- نوع مقاله: Journal Article
- کلمات کلیدی: Occupational risk assessment,Yadavaran oil field,FMEA,Construction phase,Statistical analysis
- چکیده:
- چکیده انگلیسی: Occupational hazards in the petroleum industry have always been among the major problems in the various phases of construction and installation, which sometimes cause environmental damage. The present study aims to evaluate the risk of occupational accidents in the petroleum industry in the construction phase (2010-2015) in one of the largest oil fields in Iran, namely the Yadavaran Oil Field in Khuzestan Province, and also discuss the lateral environmental damage. The environmental damage such as air, soil, and water pollution caused by occupational accidents were identified, and the distribution and type of activity were analyzed. For this purpose, the Failure Mode and Effects Analysis (FMEA) model was applied to evaluate the risk of occupational accidents. A total of 47 occupational accidents were identified during the 6-year construction phase of this oil field. The data was collected and underwent statistical analysis and risk assessment based on the location and hazards clustering, which is the main novelty of the article. According to the results, the average number of risk priorities for the observed occupational accidents was 212. Also, the occupational accidents were categorized by the type of accidents, and several corrective measures suitable for each type of accident were suggested. Based on these suggestions, the corrective Risk Priority Number (RPN) was expected to be about 133.2. As a result of these corrections, the risk reduction was expected to be 37% of the initial value. The changes introduced were low-cost, continuous, and periodic measures with positive effects on this oil field.
- انتشار مقاله: 06-05-1399
- نویسندگان: Hossein Vahidi,Amin Padash,Ramezan Heydari
- مشاهده