Farideh Zergani, Razieh Roohizadeh, M. Dayer, Mehrdad Namdari, A. Farokhnia, Yaghoub Sobhany, O. Ghayour
{"title":"In Silico Study of Global Structure of Human Serum Albumin","authors":"Farideh Zergani, Razieh Roohizadeh, M. Dayer, Mehrdad Namdari, A. Farokhnia, Yaghoub Sobhany, O. Ghayour","doi":"10.1080/19430892.2012.739454","DOIUrl":"https://doi.org/10.1080/19430892.2012.739454","url":null,"abstract":"ABSTRACT Using a molecular dynamics (MD) method, the structural changes of albumin with temperature in the presence of salts provide mechanistic insights about the structural changes and deterministic factors that participate in albumin denaturation. These studies may be helpful in understanding the mechanism by which albumin helps the body in controlling its temperature against threatening elevations. However, there are miscellaneous reports studying the effect of temperature and denaturant surfactants on albumin structure using experimental techniques—for example, Circular Dichroism (CD) and Differential Scanning Calorimetry (DSC)—in addition to theoretical studies such as in silico experiments performed using techniques such as MD. In the present work, GROMACS software was used to study albumin simulation under different conditions. The simulation was carried out for 2 ns at 310 and 313 K in a dodecahedral box filled with simple point charge (SPC) water. The results obtained through various parameter a...","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"48 1","pages":"511-515"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80163145","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}
V. Jadhav, A. Bankar, S. Zinjarde, V. Bhoraskar, S. Dhole
{"title":"Size Control of Cu Nanoparticles in Ion-Exchanged Soda-Lime Glass by 6 MeV Electron Irradiation and Its Application in Biofilm Inhibition","authors":"V. Jadhav, A. Bankar, S. Zinjarde, V. Bhoraskar, S. Dhole","doi":"10.1080/19430892.2012.739481","DOIUrl":"https://doi.org/10.1080/19430892.2012.739481","url":null,"abstract":"ABSTRACT A few soda-lime glass samples with a 1 cm2 area and 0.1 cm thickness were dipped into a molten salt bath of copper sulfate and sodium sulfate in a molar ratio of 54:46 at 545°C for 10 min. These samples were irradiated with 6 MeV energy electrons in the fluence range from 10 × 1014 to 40 × 1014 electrons/cm2 and annealed at 400°C. The optical properties and the corresponding induced effects were characterized by techniques such as ultraviolet-visible (UV-Vis), Fourier transform infrared (FTIR), scanning electron microscopy (SEM), and X-ray diffraction (XRD). The UV-Vis absorption spectra showed two peaks, one at 754 nm and other centered at 533 nm. The absorption peak at 754 nm was ascribed to Cu+2 ions, and the one at 553 nm corresponded to the surface plasmon resonance (SPR) band of nanocrystalline copper clusters. The intensity and the full-width at half maximum (FWHM) of the optical absorption peaks increased with an increase in the electron fluence. The XRD spectra showed a peak at 2θ positi...","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"4 1","pages":"455-463"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78018750","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}
A. Verma, A. Chanchal, R. Pandey, R. Vohra, N. Islam, A. Misra
{"title":"Pharmacokinetics and Biodistribution of Paclitaxel–Gelatin Nanoparticles","authors":"A. Verma, A. Chanchal, R. Pandey, R. Vohra, N. Islam, A. Misra","doi":"10.1080/19430892.2012.738962","DOIUrl":"https://doi.org/10.1080/19430892.2012.738962","url":null,"abstract":"ABSTRACT Nanoscale manipulation of properties of drug delivery systems (DDSs) provides improved control over the pharmacokinetics and pharmacodynamics of encapsulated drugs relative to free drugs. This article summarizes the preparation and therapeutic applications of paclitaxel–gelatin nanoparticles (PGNs) (Type B, 75 Bloom) in the size range ∼150 to 200 nm as confirmed by dynamic light scattering (DLS) and transmission electron microscopy (TEM), with ∼45% entrapment efficiency. Dose-dependent antineoplasticity in hepatocarcinoma, HepG2 cell line, was observed up to 72 h of incubation with PGN and the drug per se (<1 (g) showed 65% toxicity within 24 h). A pharmacokinetics and biodistribution study with endpoints at 2, 6, 24, and 48 h performed in normal and tumor-bearing, inbred Balb-c mice showed accumulation in liver and tumor with PGN. Enhanced paclitaxel accumulation in kidney was observed. In vivo antineoplastic studies showed an approximately threefold reduction of tumor with PGN.","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"11 1","pages":"500-510"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86663059","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}
{"title":"Thermo-Mechanical Characteristics of Blended White Cement Pastes Containing Ultrafine Nano Clays","authors":"A. E. Al-Salami, H. Shoukry, M. Morsy","doi":"10.1080/19430892.2012.706186","DOIUrl":"https://doi.org/10.1080/19430892.2012.706186","url":null,"abstract":"Abstract The aim of this work was to produce highly active and amorphous nano sized pozzolana by means of thermal activation of nanoclays and to utilize the thermally activated nanoclays as additives in white Portland cement pastes (WPC) to improve their thermo mechanical properties. The nanoclay used in this investigation is kaolin clay. The nano Kaolin was thermally treated at 750°C for 2 h to obtain active amorphous nano metakaolin (NMK). The effect of thermal activation on the dehydroxylation of the kaolin and the surface morphology of the resulting amorphous NMK were determined by using different techniques: X-ray diffraction spectroscopy (XRD), differential thermal analysis (DTA) and Transmission electron microscopy (TEM). NMK were incorporated at a rate of 2, 4, 6, 8, 10, 12, and 14% by weight of cement. Hardened blended cement pastes were prepared by using water/cement ratio (W/C) of 0.3 by weight and hydrated for various curing ages 3, 7, and 28 days. In order to study the mechanical and physical...","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"44 1","pages":"516-527"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74595192","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}
K. B. Sapnar, L. A. Ghule, A. Bankar, S. Zinjarde, V. Bhoraskar, K. Garadkar, S. Dhole
{"title":"Antimicrobial Activity of 6.5 MeV Electron-Irradiated ZnO Nanoparticles Synthesized by Microwave-Assisted Method","authors":"K. B. Sapnar, L. A. Ghule, A. Bankar, S. Zinjarde, V. Bhoraskar, K. Garadkar, S. Dhole","doi":"10.1080/19430892.2012.738162","DOIUrl":"https://doi.org/10.1080/19430892.2012.738162","url":null,"abstract":"ABSTRACT Zinc oxide (ZnO) nanoparticles were synthesized by a microwave method and were tailored using an energy electron irradiation method at 6.5 MeV. ZnO nanoparticles with a size of 40 nm were exposed to different fluences of 6.5 MeV electrons over the range from 5 × 1014 to 3.5 × 1015 electron/cm2. These electron-irradiated ZnO nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) techniques. The XRD results showed that the ZnO nanoparticles retained the hexagonal phase with a wurtzite structure. However, the particle size decreased continuously from 40 to 15 nm with increasing electron fluence. The TEM results also supported for the reduction of the ZnO nanoparticles by 6.5 MeV electron irradiation. The antimicrobial activities of the as-synthesized and electron-irradiated ZnO nanoparticles on the fungus Candida albicans were studied. In this case, the electron-irradiated ZnO nanoparticles showed higher antimicrobi...","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"266 1","pages":"477-483"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73357382","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}
{"title":"Recent Developments in the Growth and Properties of Carbon Nanotubes and Carbon Nanostructures: A Review","authors":"Vishakha Kaushik, H. Sharma, V. Vankar","doi":"10.1080/19430892.2012.738508","DOIUrl":"https://doi.org/10.1080/19430892.2012.738508","url":null,"abstract":"ABSTRACT Carbon nanotubes, carbon nanostructures, and carbon metal composites are grown using microwave plasma–enhanced chemical vapor deposition and laser ablation processes. Iron (Fe), aluminum (Al)-Fe, and nickel (Ni)-Fe films with a thickness of 10 nm are used as catalysts for the growth of these carbon nanostructures (CNSs). It was found that the morphology and hence surface density of CNSs changed by varying the catalysts. The changes in the morphology were related to the electron field emission results carried out using a diode setup. The field enhancement factor (β) was found to be maximum (9574) for Al-Fe-catalyzed CNTs compared to Fe-catalyzed CNTs (7324).","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"30 1","pages":"534-540"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81235908","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}
{"title":"One-Pot Synthesis of Cobalt Selenide Nanoparticles","authors":"P. Khanna, V. Dhapte","doi":"10.1080/19430892.2012.739445","DOIUrl":"https://doi.org/10.1080/19430892.2012.739445","url":null,"abstract":"ABSTRACT Cobalt selenide nanoparticles were synthesized via a simple one-pot reaction between cobalt chloride and sodium selenide. Sodium selenide was prepared by using sodium formaldehyde sulfoxylate (SFS) in high boiling solvents such as N,N′-diemthylformamide (DMF) or ethylene glycol (EG). SFS acts as a reducing agent to selenium as well as a surfactant to the nanoparticles and enables control of particle nucleation and growth during synthesis. Black powders so obtained were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray (EDX) analysis, X-ray photoelectron spectroscopy (XPS), and infrared (IR) spectroscopy. The broad XRD pattern indicated an orthorhombic structure with particle diameter of about 20 nm and TEM showed deshaped spherical particles of similar dimensions. XPS confirmed oxidized surfaces because the Se 3d binding energy spectrum showed two peaks indicating the formation of selenium dioxide on the surface.","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"1 1","pages":"425-429"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82076514","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}
{"title":"Development of Polymer Composite Beads for Dye Adsorption","authors":"A. Ayalew, Renuka R. Gonte, K. Balasubramanian","doi":"10.1080/19430892.2012.739480","DOIUrl":"https://doi.org/10.1080/19430892.2012.739480","url":null,"abstract":"ABSTRACT Polymer composite beads of sugarcane molasses with cellulose (SM-C) were successfully synthesized using a precipitation polymerization technique. The use of sugarcane molasses as a cost-effective adsorbent for treatment of industrial effluents motivated this study. Incorporation of biomaterial (SM) resulted in enhanced adsorption properties of the polymer composite. These synthesized composite beads were utilized for effluent wastewater containing direct blue dye and direct yellow dye. Functional group detection and surface morphology were observed using Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM), respectively. A maximum of 50% sugarcane molasses loading was achieved, which resulted in the formation of composite beads. These beads were used to investigate the adsorption of dye from aqueous solution in a batch system. Uptake of dye from the mimicked wastewater system was followed by ultraviolet-visible (UV-Vis) spectral analysis. Detailed investigation of...","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"54 1","pages":"440-454"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90596131","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}
Mamta Khaneja, Swati Singh, Santanu Ghosh, J. Rawat, P. K. Chaudhary, V. kumar
{"title":"Modeling Field Emission from Single-Tip Carbon Nanotube in Triode Configuration","authors":"Mamta Khaneja, Swati Singh, Santanu Ghosh, J. Rawat, P. K. Chaudhary, V. kumar","doi":"10.1080/19430892.2012.739061","DOIUrl":"https://doi.org/10.1080/19430892.2012.739061","url":null,"abstract":"ABSTRACT This article presents a simulation study on the field emission characteristics of a single carbon nanotube (CNT) cathode in the triode structure. Computer Simulation Technology (CST) Particle Studio (M/s Jyoti Electronics, India) was used to simulate the triode characteristics in relation to geometrical parameters, position of the CNT, and applied gate and anode potentials. The results emphasize the significance of simulation-based optimization of structural parameters and field conditions prior to actual fabrication of CNT field emitters.","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"283 1","pages":"547-552"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76839051","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}
K. Dhanabalan, P. Khanna, K. Gurunathan, N. Reji, S. Viswanathan, V. Renugopalakrishnan
{"title":"Mild Synthesis of Fe2O3/CdS Nanoparticles and Their Magnetic and Luminescense Studies","authors":"K. Dhanabalan, P. Khanna, K. Gurunathan, N. Reji, S. Viswanathan, V. Renugopalakrishnan","doi":"10.1080/19430892.2012.738179","DOIUrl":"https://doi.org/10.1080/19430892.2012.738179","url":null,"abstract":"ABSTRACT Colloidal nanocrystal heterostructures consisting of two or more inorganic phases provide novel approaches in developing multifunctional building block materials. Simultaneously achievable magnetically directed motion and fluorescence imaging with heterostructural materials may find use in biomedical applications. Fe2O3/CdS was synthesized through an aqueous route at ambient temperature. The heterostructure of nanocrystals were obtained by semiconductor materials on magnetic nanoparticles. The crystal structure and crystallinity of materials were first identified by X-ray diffraction (XRD) and Raman scattering measurements. The XRD showed Bragg's reflections related to Fe2O3 and CdS. The as-synthesized hierarchical nanostructure exhibited a weak ferromagnetic character compared to pure ferromagnetic materials due to their low coercivity. A sharp peak of photoluminescence spectra was observed due to surface trap–induced emissions. The optical and magnetic properties of Fe2O3/CdS nanostructures sug...","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"51 1","pages":"470-476"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89845837","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}