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1562 articles for “X.509”
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Using a Lightweight Cryptographic Algorithm to Improve Cloud Computing Data Security
Abstract: The use of cloud computing technology allows for the storage of vast amounts of data. It is now crucial to protect the integrity, confidentiality, privacy, and handling processes of cloud computing data from attackers. To improve data security in cloud computing, a novel, lightweight cryptographic algorithm was put forth in this study. The algorithm, which is a 16-byte or 128-bit block cipher, requires a 16-byte or 128-bit key to encrypt …
Published in Recent Trends in Parallel Computing · Vol. 10, Issue 1, 2023 · pp. 22–34 Read article
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Synthesis and Characterization of Strontium Aluminate Nanophosphors
Abstract: Monoclinic SrAl4O7 nanophosphors with different weight percentage of aluminium were synthesized by low temperature sol-gel method. The morphology, composition and structure of the synthesized phosphors were characterized by scanning electron microscope (SEM), energy dispersive X-ray (EDX), photoluminescence emission spectra (PL) and X-ray diffraction (XRD) respectively. It was found that PL emission was obtained at 395, 520, and 790 nm corresponding to blue, green and IR region of the spectrum, respectively. …
Published in Nano Trends – A Journal of Nano Technology & Its Applications · Vol. 18, Issue 2, 2016 · pp. 7–10 Read article
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Synthesis, Crystal Structure and Reactivity Study of N-Pyrrolyl-P, P-Diphenylphosphino Sulfide/Selenide Ligand
Abstract: 800x600 We report the synthesis and solid state structures of the N-pyrrolyl-P,P-diphenylphosphino sulfide and selenide of molecular formulae [C4H4NP(S)Ph2] (1) and [C4H4NP(Se)Ph2] (2) respectively. Compounds 1 and 2 were prepared by one pot reaction of pyrrole and [Ph2P(E)Cl] (E = S and Se) in the presence of NaH as base at ambient temperature. In the solid state structure established by single crystal X-ray diffraction analysis, phosphorus atom adopts a distorted …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 5, Issue 3, 2014 · pp. 35–45 Read article
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Soil Erosion Assessment and Its Effect on Sustainability for a Mountainous Watershed using Remote Sensing and GIS
Abstract: Normal 0 false false false EN-US X-NONE AR-SA Normal 0 false false false EN-US X-NONE AR-SA MicrosoftInternetExplorer4 Normal 0 false false false EN-US X-NONE AR-SA MicrosoftInternetExplorer4 Soil erosion is an important social and economic problem, and an essential factor in assessing health and function of ecosystem. Soil-erosion control requires a quantitative evaluation of potential soil erosion on a specific location. The revised universal soil loss equation (RUSLE), remote sensing, and …
Published in Journal of Remote Sensing & GIS · Vol. 4, Issue 3, 2013 · pp. 68–80 Read article
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Statistical Optimization of the Medium for the Production of α-Amylase by the Mutant Aspergillus flavus MS-12 Using Response Surface Methodology
Abstract: Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} The present study is concerned with the improvement of Aspergillus flavus S-12 for α-amylase production. The mutant’s ability to produce α-amylase increased 1.24 times after …
Published in Research and Reviews: A Journal of Microbiology and Virology · Vol. 1, Issue 3, 2011 · pp. 13–23 Read article
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Differential Susceptibility of Bacteriophage and Viruses to Reactive Oxygen Species
Abstract: Normal 0 false false false EN-US X-NONE X-NONE Reactive oxygen species of superoxide, hydrogen peroxide, and hydroxyl radicals were generated by mixing xanthine, xanthine oxidase and iron citrate and incubating for 5 min at room temperature. T2 bacteriophage, encephalomyocarditis (EMC) virus, adenovirus, or vaccinia virus particles were incubated with the solution for various periods of time after reactive oxygen species were formed. Physical damage to the virus particles that affected …
Published in Research and Reviews: A Journal of Microbiology and Virology · Vol. 6, Issue 2, 2016 · pp. 7–12 Read article
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Antibacterial Activity of CaSO4 Nanorods Prepared via Hydrothermal Method Compared to Bulk CaSO4
Abstract: 800x600 Normal 0 false false false EN-US X-NONE X-NONE Calcium sulphate (CaSO4) nanorods have been synthesized by low-temperature hydrothermal method using CaSO4 powder as precursor and hexadecylamine (HDA) as surfactant at 180 0C for 7 days. The powder X-ray diffraction (PXRD) patterns were studied. Scanning electron microscopy (SEM) images show nanorods have diameters of about 100nm-200nm and length of about 2-10μm. Fourier transformed infrared spectrum (FTIR) shows a strong doublet …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 3, Issue 1, 2013 · pp. 1–6 Read article
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Synthesis by Sol–Gel Method and Characterization of CaAlO: Mn, Dy Nanoparticles
Abstract: Dy and Mn doped Calcium Aluminate nanoparticles were synthesized by using Sol-gel method. Heat treated material was characterized by X-ray diffraction(XRD), optical study of photoluminescence (PL) emission spectra, morphological study of scanning electron microscopy (SEM) combined with X-ray analysis. The Dy and Mn doped phosphor exhibits emission at the excitation of the material with 380 nm wavelength generates a strong emission at 480 nm. Besides this, subsidiary maxima at 417, …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 4, Issue 2, 2014 · pp. 23–27 Read article
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Sol–Gel Synthesis of SrAl4O7 and Defect-Related Luminescence Properties
Abstract: Single phase of monoclinic SrAl4O7 is synthesized by sol–gel process at a markedly lower temperature as compared to conventional solid-state reaction. The sol–gel derived samples were characterized by thermal gravimetric analysis (TGA), X-ray powder diffraction (XRD) analysis, scanning electron microscope (SEM) and spectrofluorometer. The XRD analysis shows that the strontium aluminate has the monoclinic (α-SrA2) structure. It was demonstrated that the PL emission was obtained at 395 nm, 510 nm …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 5, Issue 2, 2015 · pp. 16–19 Read article
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Efficient Green Synthesis of TiO2 Nanoparticles Using Murraya koenigii Leaf Extract
Abstract: Green synthesis of nanoparticles by plant extract is at present under exploitation due to eco-friendly, non-toxic and inexpensive process. Titanium dioxide (TiO2) nanoparticles were synthesized by ultrasound assisted sol-gel precipitation method using titanium tetra-isopropoxide as a precursor and Murraya koenigii leaf extract as a reducing and stabilizing agent. The leaf extract was prepared under various solvent media such as ethanol and distilled water under controlled ultrasonication. Due to effective ultrasound, …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 6, Issue 1, 2016 · pp. 29–38 Read article
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Growth and Description of Cu Nanostructure via a Chemical Reducing Process
Abstract: Chemical reduction process has been employed to produce copper (Cu) nanostructure by using L-ascorbic acid. The use of L-ascorbic acid makes this process cost effective. In this process, copper chloride (CuCl2.2H2O) has been used as a precursor to produce the Cu nanostructure. They were characterized through UV-visible (UV-Vis) spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The experimental findings revealed that the molar concentrations of L-ascorbic acid played an …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 6, Issue 3, 2016 · pp. 27–31 Read article
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Investigation of Oxidation Behaviour of Plasma Sprayed Carbon Nanotubes-Alumina Coated ASME-SA213-T22 Boiler Tube Steel
Abstract: AbstractIn this research work, carbon nanotubes reinforced Al2O3 coated ASME-SA213-T22 boilertube steel was investigated for high temperature oxidation behaviour at 900ï‚°C temperature inthe air. The coatings were deposited using plasma spray technique and NiCr was used asbond coat before applying CNTs-Al2O3 coatings. The hot corrosion studies were conducted onuncoated as well as plasma spray coated specimens in air at 900°C under cyclic conditions.The thermogravimetric technique was used to establish kinetics …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 7, Issue 2, 2017 · pp. 10–22 Read article
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Thermal-hydraulic Safety Assessment of a Miniature Neutron Source Reactor
Abstract: The main objective of this study is to assess the thermal-hydraulic safety capability of the PLTEMP/ANL v 4.0 in analyzing Ghana Research Reactor-1 (GHARR-1), with vertical fuel rods cooled by natural convection, operating at a nominal power (30 kW) with sufficient safety margins. The neutronic analysis of the core was performed using MCNP X code, where parameters of interest were the power distributions and the power peaking factors. The thermal-hydraulic …
Published in Journal of Nuclear Engineering & Technology · Vol. 3, Issue 3, 2013 · pp. 18–44 Read article
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System Integrity Analysis on the PMS Designed with the ALS Platform
Abstract: FPGA technology based ALS platform was designed by WEC as the next generation 1E class platform for protection and monitoring system development for nuclear power plants and had been approved by NRC in 2013. Based on the features of the platform and typical PMS function requirements, a new overall architecture based on ALS for PMS is designed and the consistency with system integrity requirements in SRP is analyzed. The evaluation …
Published in Journal of Nuclear Engineering & Technology · Vol. 5, Issue 2, 2015 · pp. 1–11 Read article
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Green Synthesis of Zinc Oxide Nanoparticles using Extracts of Ocimum Tenuiflorum and its Characterization
Abstract: Various applications of nanoparticles stimulate the need for synthesizing them. But, the conventional methods are usually hazardous and energy consuming. This leads to the focus on “green synthesis” of nanoparticles which was an efficient and eco-friendly approach. Natural diminishment operators are being investigated worldwide to limit the impacts of toxic chemicals utilized as a part of nanoparticles creation. The present study states a green approach for the synthesis of zinc …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 8, Issue 1, 2018 · pp. 9–19 Read article
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Synthesis and Characterization of CeO2-ZrO2 Nanocomposites
Abstract: CeO2-ZrO2 nanocomposites were prepared by hydrothermal method and characterized by using XRD (X-ray diffractometer) to study the structural analysis of the prepared nanocomposites. The as-prepared samples were further annealed at 150º C and 300º C. From the structural studies crystal size and lattice parameter was calculated. FTIR analysis confirms the results of vibrational spectra and XPS, EDAX analysis confirms the elements presents in the composites. Effect of annealing in frequency …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 8, Issue 3, 2018 · pp. 21–32 Read article
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Catalytic Reduction of Organic Dyes with Green Synthesized Silver Nanoparticles using Aloe vera Leaf Extract
Abstract: In this present study, we report a facile, cost-effective and non-toxic method of synthesis of silver nanoparticles using 4mM silver nitrate and aqueous leaf extract of Aloe vera as reducing and capping agent in presence of 25% ammonia solution. Then these green synthesized nanoparticles are used as catalysts for the degradation of organic dyes. The synthesized silver nanoparticles (AVSNPs) were characterized using different techniques like UV-Visible spectroscopy, Fourier infrared spectroscopy …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 9, Issue 2, 2019 · pp. 9–21 Read article
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Investigating the Effect of Annealing Temperatures on SnO2 Nano Structural Thin Films and their Properties
Abstract: As deposited and two different annealing temperatures (500°C and 600°C) of Tin dioxide (SnO2) thin films are prepared on glass substrates by Chemical Bath Deposition (CBD) technique and subsequently their structural, morphological, optical and electrical properties are investigated and analyzed as a function of annealing temperature. It’s found that SnO2 films exhibit different nanostructures at different annealing temperatures. XRD analysis confirms that both deposited and annealed films are cubic structure …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 12, Issue 1, 2022 · pp. 28–39 Read article
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Study of Elastic Properties of Copper Substituted Nickel – Zinc Nano Ferrites Through IR-Spectroscopy
Abstract: Nano crystalline Ni 0.65 Zn 0.35 Cu x Fe (2-2x/3) O 4, (x ranging from 0 – 0.05 in steps of 0.01) ferrites synthesized via hydrothermal route are characterized by FTIR spectroscopy. IR spectra of prepared ferrites demonstrated the two fingerprint absorption bands of spinels in the range of 400-600 cm-1. Lattice constant, X-ray density values obtained from XRD patterns used for evaluating the tetrahedral site and octahedral site force …
Published in Nano Trends – A Journal of Nano Technology & Its Applications · Vol. 25, Issue 2, 2023 · pp. 1–12 Read article
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Structural and Dielectric Properties Hexaferrite/Poly (Vinyl Alcohol) Composites
Abstract: Magnetic barium cobalt hexaferrite particles-PVA composites with of different mass ratio: 9:1, 8:2, 7:3, 6:4 and 5:5 were prepared. Structural properties of the composites were characterized by Infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscope (SEM). The effect of the concentration of Ba2Co2Fe28O46 hexaferrites on structural and dielectric properties of magnetic-PVA composites were investigated. FTIR result revealed that composite samples show absorption peaks of both ferrites and PVA. …
Published in Research & Reviews : Journal of Physics · Vol. 2, Issue 3, 2013 · pp. 10–19 Read article