international journal of nano dimension最新文献_第3页

Low-cost and eco-friendly phyto-synthesis of Silver nanoparticles by using grapes fruit extract and study of antibacterial and catalytic effects 低成本、环保的葡萄果实提取物合成纳米银及其抑菌和催化作用研究

IF 1.5

international journal of nano dimension Pub Date : 2017-03-01 DOI: 10.22034/IJND.2017.24376

S. Farhadi, Bahram Ajerloo, A. Mohammadi

{"title":"Low-cost and eco-friendly phyto-synthesis of Silver nanoparticles by using grapes fruit extract and study of antibacterial and catalytic effects","authors":"S. Farhadi, Bahram Ajerloo, A. Mohammadi","doi":"10.22034/IJND.2017.24376","DOIUrl":"https://doi.org/10.22034/IJND.2017.24376","url":null,"abstract":"* Corresponding Author Email: sfarhadi1348@yahoo.com How to cite this article Farhadi S, Ajerloo B, Mohammadi A. Low-cost and eco-friendly phyto-synthesis of Silver nanoparticles by using grapes fruit extract and study of antibacterial and catalytic effects. Int. J. Nano Dimens., 2017; 8(1): 49-60, DOI: 10.22034/ijnd.2017.24376 Abstract In this research, silver nanoparticles (Ag NPs) were prepared by a low-cost, rapid, simple and ecofriendly approach using Grape fruit extract as a novel natural reducing and stabilizing agent. The product was characterized by UV-visible spectroscopy, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray (EDX) spectroscopy and transmission electron microscopy (TEM). The reaction conditions including time, content of reducing agent and silver nitrate, temperature and pH were investigated. The optimum yield of Ag NPs was obtained when 10 mM of silver nitrate was reacted with 9 mL of Grape fruit extract at pH=9 and heated it to 55 oC within 25 minutes. The crystalline nature of Ag NPs was confirmed from XRD analysis. SEM and TEM images showed that the obtained Ag NPs were spherical in shape and their sizes were in the range of 25-85 nm. EDX analysis confirmed presence of the elemental silver. On the basis of FT-IR analysis, it can be stated that the hydroxyl, carbonyl and carboxyl functional groups present in bio-molecules of Grape fruit extract are responsible for the reduction of Ag+ ions and stabilization of the obtained Ag NPs. The biosynthesized Ag NPs showed good antimicrobial activity against Gram-positive (Bacillus cereus, Staphylococcus aureus, Staphylococcus epidermidis) and Gram-negative (Escherichia coli, Klebsiella pneumoniae) bacteria. In addition, the catalytic activity of the Ag NPs was studied for the reduction of nitro compounds by using NaBH4.","PeriodicalId":14081,"journal":{"name":"international journal of nano dimension","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72600317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Biogenic synthesis and antimicrobial activity of Silver nanoparticle using exopolysaccharides from Lactic Acid bacteria 乳酸菌胞外多糖生物合成纳米银及其抗菌活性研究

IF 1.5

international journal of nano dimension Pub Date : 2017-03-01 DOI: 10.22034/IJND.2017.24377

B. Adebayo-Tayo, A. Popoola

{"title":"Biogenic synthesis and antimicrobial activity of Silver nanoparticle using exopolysaccharides from Lactic Acid bacteria","authors":"B. Adebayo-Tayo, A. Popoola","doi":"10.22034/IJND.2017.24377","DOIUrl":"https://doi.org/10.22034/IJND.2017.24377","url":null,"abstract":"Nanotechnology provides the ability to engineer the properties of materials by controlling their size, and this has driven research toward a multitude of potential uses for nanomaterials. This study aimed at biosynthesis and characterization of silver nanoparticles (SNPs) using exopolysaccharides (EPS) of lactic acid bacteria (LAB) and the antimicrobial potential of the biosynthesized SNPs against some pathogenic bacteria. EPS production by the EPS- producing Lactobacillus casei (LPW2E) and Lactobacillus fermentum (LPF6) using submerged fermentation ranged from 256 - 640.9 mg/L. The EPS produced by the two LABs were used for the biosynthesis of SNPs. The SNPs were characterized by colour changes from colourless to yellowish brown and deep brown after 24hrs of incubation. The UV-visible spectrophotometer was further used to characterize the SNPs. The SNPs had strong surface plasmon resonance band at 500nm. Scanning electron microscopic (SEM) analysis showed that the SNPs varied in shape and were partially aggregated. The particle size ranged from 0.2–10nm and 0.0–10nm. The FTIR analysis indicated the presence of functional groups such as hydroxyl, carboxyl, ester, aldehydes among others which may be responsible for the reduction, capping, and stabilization of the SNPs. The SNPs had antibacterial activity against the test pathogens and the zones of inhibition ranged between 12 - 26mm. In conclusion, this study demonstrated that EPS could be used for the production of stable SNPs with antibacterial activity.","PeriodicalId":14081,"journal":{"name":"international journal of nano dimension","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78079715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 21

Fault-tolerant adder design in quantum-dot cellular automata 量子点元胞自动机中的容错加法器设计

IF 1.5

international journal of nano dimension Pub Date : 2017-03-01 DOI: 10.22034/IJND.2017.24375

Razieh Farazkish

引用次数: 8

Effect of nano Zinc Oxide on gas permeation through mixed matrix poly (Amide-6-b-Ethylene Oxide)-based membranes 纳米氧化锌对混合基聚酰胺-6-乙烷基膜气体渗透的影响

IF 1.5

international journal of nano dimension Pub Date : 2017-03-01 DOI: 10.22034/IJND.2017.24374

M. Sheikh, M. Asghari, M. Afsari

{"title":"Effect of nano Zinc Oxide on gas permeation through mixed matrix poly (Amide-6-b-Ethylene Oxide)-based membranes","authors":"M. Sheikh, M. Asghari, M. Afsari","doi":"10.22034/IJND.2017.24374","DOIUrl":"https://doi.org/10.22034/IJND.2017.24374","url":null,"abstract":"* Corresponding Author Email: asghari@kashanu.ac.ir How to cite this article Sheikh M, Asghari M, Afsari M. Effect of nano Zinc Oxide on gas permeation through mixed matrix poly (Amide-6-b-Ethylene Oxide)-based membranes. Int. J. Nano Dimens., 2017; 8(1): 31-39, DOI: 10.22034/ijnd.2017.24374 Abstract Poly (amide-6-b-ethylene oxide)/zinc oxide (PEBA/ZnO) mixed matrix membranes were fabricated using ethanol/water as solvent by solvent casting method. The concentration of ZnO in membrane was set to 0.1 wt.% and the synthesized membranes were characterized by AFM and FTIR. Effects of ZnO nanoparticle on CO2, CH4 and N2 permeabilities, and CO2/N2 and CO2/CH4 selectivities of the membranes were investigated at the ambient temperature and pressure range of 4–12 bar. The results revealed that the CO2 permeability of the nano-composite membrane increased 158 % with pressure, from 54.08 barrer (at 4 bar) to 139.59 barrer (at 12 bar). Furthermore, CO2 permeability for the nano-composite membrane was higher than neat polymeric membrane. The PEBA/ZnO nano-composite membranes thus provide a promising potential for CO2/N2 and CO2/CH4 separation.","PeriodicalId":14081,"journal":{"name":"international journal of nano dimension","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79689044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Energy states and exchange energy of coupled double quantum dot in a magnetic field 耦合双量子点在磁场中的能态和交换能

IF 1.5

international journal of nano dimension Pub Date : 2017-03-01 DOI: 10.22034/IJND.2017.24353

M. Elsaid, Eshtiaq Hjaz, A. Shaer

引用次数: 4

Cyclic voltammetry of bulk and nano manganese sulfate with Doxorubicin using glassy Carbon electrode 用玻碳电极用阿霉素循环伏安法测定大块和纳米硫酸锰

IF 1.5

international journal of nano dimension Pub Date : 2017-03-01 DOI: 10.22034/IJND.2017.24380

E. Gomaa, M. Morsi, A. Negm, Yara A Sherif

引用次数: 8

Development and evaluation of bio-nanoparticles as novel drug carriers for the delivery of Donepezil 多奈哌齐新型药物载体的开发与评价

IF 1.5

international journal of nano dimension Pub Date : 2017-03-01 DOI: 10.22034/IJND.2017.24354

S. Mukhopadhyay, N. Madhav, K. Upadhyaya

{"title":"Development and evaluation of bio-nanoparticles as novel drug carriers for the delivery of Donepezil","authors":"S. Mukhopadhyay, N. Madhav, K. Upadhyaya","doi":"10.22034/IJND.2017.24354","DOIUrl":"https://doi.org/10.22034/IJND.2017.24354","url":null,"abstract":"The purpose of the present study was to formulate and evaluate donepezil loaded bio-nanoparticles for effective treatment of Alzheimer’s disease. For the preparation of bio-nanoparticles biomaterial was isolated from fruits of Carica papaya by an economic method. The biomaterial recovered from the concentrate was subjected for various physicochemical properties like color, solubility, color changing point and chemical test. Bio-nanoparticles were prepared by modified nanoprecipitation method in different batches with variable drug/biomaterial ratio. Prepared batches were subjected for various evaluation studies like particle size, zeta potential, scanning electron microscopic studies, transmission electronmicroscopy, surface entrapment, in-vitro diffusion, differential scanning calorimetry and stability. Particle size and zeta potential result revealed that all nanoformulation were within range of 1.808 to 995.1 with slight negative in charge. Scanning electron microscopy and transmission electronmicroscopy report indicate that formulations were spherical in shape with less or no aggregation. Less surface entrapment leads to better drug entrapped inside nanomatrix. Bio-nanoformulations were capable of releasing the drug in a slow sustained manner. From the present investigation, it may be concluded that biomaterial isolated from fruits of Carica papaya used in the preparation of bio-nanoparticle act as an efficient carriers for deliver donepezil at a controlled rate and may significantly improve the ability to cross blood-brain barrier.","PeriodicalId":14081,"journal":{"name":"international journal of nano dimension","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78743629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

DFT Investigations for sensing capability of a single-walled Carbon nanotube for adsorptions H2, N2, O2 and CO molecules 单壁碳纳米管吸附H2、N2、O2和CO分子传感能力的DFT研究

IF 1.5

international journal of nano dimension Pub Date : 2017-03-01 DOI: 10.22034/IJND.2017.24379

Alaa M. Khudhair, F. Ajeel, M. Mohammed

{"title":"DFT Investigations for sensing capability of a single-walled Carbon nanotube for adsorptions H2, N2, O2 and CO molecules","authors":"Alaa M. Khudhair, F. Ajeel, M. Mohammed","doi":"10.22034/IJND.2017.24379","DOIUrl":"https://doi.org/10.22034/IJND.2017.24379","url":null,"abstract":"Single-walled carbon nanotubes (SWCNTs) have a great deal of attention due to their unique properties. These properties of SWCNTs can be used in various devices such as nanosensors. SWCNTs nanosensors have fast response time and high sensitivity to special gas molecules which is very favorable for important applications. Recently, gas adsorption over outer surface of SWCNTs nanosensors was arguably a very interesting theoretical study. Here, the sensing capability of (6,0) SWCNTs for adsorption H2, N2, O2 and CO molecules are studied.Thegeometry optimization, electronic, thermodynamic, and vibrational properties have been investigated. All the calculations are based on the density functional theory (DFT) at the B3LYP/6-31G level through the Gaussian 09W program package. It is found that, adding these molecules to SWCNT causing a small increase in the bond lengths, and an increase in the total energy. In IR spectra, it is observed increasing the vibration modes and higher stretching vibration wave numbers of SWCNT with the studies molecules. This work confirms that (6,0) SWCNT can be used as nanosensor, and using DFT investigations, it is possible to obtain much more data to apply in medical science and industrial technologies.","PeriodicalId":14081,"journal":{"name":"international journal of nano dimension","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89535219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Vibration analysis of a Timoshenko non-uniform nanobeam based on nonlocal theory: An analytical solution 基于非局部理论的Timoshenko非均匀纳米梁振动分析:一个解析解

IF 1.5

international journal of nano dimension Pub Date : 2017-03-01 DOI: 10.22034/IJND.2017.24378

S. Hashemi, H. Khaniki

引用次数: 19

Effect of nonionic surfactant additives on the performance of nanofluid in the heat exchanger 非离子表面活性剂添加剂对换热器中纳米流体性能的影响

IF 1.5

international journal of nano dimension Pub Date : 2017-03-01 DOI: 10.22034/IJND.2017.24373

G. P. Lakhawat, R. Ugwekar, S. Suke, V. M. Nanoti

{"title":"Effect of nonionic surfactant additives on the performance of nanofluid in the heat exchanger","authors":"G. P. Lakhawat, R. Ugwekar, S. Suke, V. M. Nanoti","doi":"10.22034/IJND.2017.24373","DOIUrl":"https://doi.org/10.22034/IJND.2017.24373","url":null,"abstract":"* Corresponding Author Email: sgsuke@hotmail.com How to cite this article P Lakhawat G, P Ugwekar R, G Suke S. Effect of nonionic surfactant additives on the performance of nanofluid in the heat exchanger. Int. J. Nano Dimens., 2017; 8(1): 18-30, DOI: 10.22034/ijnd.2017.24373 Abstract A nanofluid is mixture of nano sized particles and a base fluid. This paper investigates by using laboratory based double pipe heat exchanger model, the performance of nanofluid containing about 48.46nm particle size nanoparticles (ZnO) without or with addition of nonionic surfactant Rokanol K7 (500ppm) into the base fluid double distilled water to prepared three different concentrations 1.0%, 2% and 3% (v/v) of ZnOwater or ZnO-RK7. Effects of temperature and concentration of nanoparticles on viscosity and heat transfer coefficient in heat exchanger are investigated. The experimental results shows that the viscosity of nanofluids increased with increasing concentration of fluid whereas decreased with increasing temperature from 20 to 60oC. However, it has been also observed that heat transfer coefficient increases with the operating temperature and concentration of nanoparticles. The conclusion derived for the study is that overall heat transfer coefficient enhanced with increasing concentration upto 3% of ZnO-RK7 as compared to without surfactant nanofluids.","PeriodicalId":14081,"journal":{"name":"international journal of nano dimension","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73898878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2