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Petaling Jaya, Malaysia

Rasin N.,Manipal International University | Kueh A.B.H.,University of Technology Malaysia | Mahat M.N.H.,University of Technology Malaysia | Yassin A.Y.M.,Petronas University of Technology
Journal of Composite Materials

We examine numerically the uniaxially compressed stability of triaxially woven fabric (TWF) composites employing a proposed geometrically nonlinear finite composite plate element model with volume segmentation ABD constitutive relation, taking advantage of greatly reduced degrees of freedom. From satisfactory agreement with results from literature, numerous boundary conditions are explored for various aspect ratios in the buckling analysis. High dependencies of post-buckling patterns on plate aspect ratios are observed, from which a computationally time-saving characteristic equations have been defined before the occurrence of post-buckling state for practical convenience, best described on the basis of logarithmic critical buckling load and stiffness factor. These buckling characteristics have a direct general correlation to TWF's aspect ratios and boundary rigidities. © 2016 The Author(s). Source

Naveen Prasad B.S.,Sathyabama University | Padmesh T.V.N.,Manipal International University
International Journal of Pharma and Bio Sciences

Development of biologically inspired experimental processes for the synthesis of nanoparticles might be important in biomedical applications. Solanum torvum extract when challenged with chloroauric acid leads to formation of gold nanoparticles. The formations of gold nanoparticles were studied by UV-vis spectra and their size of gold nanoparticles in the colloidal solutions was investigated by HRTEM, the average size of gold nanoparticles nanoparticles was found to be 8.4 nm. The rapid reduction of AuCl4 -ions highlights the possibility of green pathways to produce technologically important nanomaterials. Source

Velu V.,Manipal International University | Mariun N.,University Putra Malaysia | Mohd Radzi M.A.,University Putra Malaysia | Mailah N.F.,University Putra Malaysia
Scientific Programming

Three-phase system has numerous advantages over the single-phase system in terms of instantaneous power, stability, and cost. Three-phase systems are not available in every location particularly in remote rural areas, hill stations, low voltage distribution homes, and so forth. Having a system that is capable of converting directly the readily available single-phase system to three phases will have greater usability in various applications. The routine techniques adopted in the direct ac-ac single-phase-to-three-phase converters do not yield the best desired outputs because of their complexity in the segregation process and bidirectional nature of the input signal. Other initiatives use ac-dc-ac converters which are huge and costly due to dc link energy storage devices. Further, none of these systems provide a convincing result in producing the standard three-phase output voltages that are 120° away from each other. This paper proposes an effective direct ac-ac single-phase-to-three-phase conversion technique based on space vector pulse width modulation based matrix converter system that produces a convincing three-phase output signals from a single-phase source with balanced modulation index characteristics. The details of the scientific programming adopted on the proposed technique were presented. © 2016 Vengadeshwaran Velu et al. Source

Naveen Prasad B.S.,Sathyabama University | Padmesh T.V.N.,Manipal International University | Ganesh Kumar V.,Sathyabama University | Govindaraju K.,Sathyabama University
International Journal of Pharma and Bio Sciences

Phytochemical based synthesis of palladium nanoparticles by bioreduction of medicinally potent plant extract Coleus amboinicus is investigated in the present study. Treatment of palladium chloride with Coleus amboinicus extract resulted in the formation of palladium nanoparticles. The formation of palladium nanoparticles were confirmed using UV-vis, FTIR, TEM and XRD. Polyols such as flavones, terpenoids and polysaccharides would be involved in bioreduction of metallic Pd (II) to Pd (0). The nanoparticles were spherical and triangular in shape with size ranging from 10-28 nm. Source

Naveen Prasad B.S.,Sathyabama University | Padmesh T.V.N.,Manipal International University
Research Journal of Pharmacy and Technology

A simple and eco-friendly green synthesis of silver nanoparticles using Common duckweed (Lemna minor) as the reducing and stabilizing agent is reported. Lemna minor (Lm) extract was mixed with silver nitrate (AgNO3) solution for the production of silver nanoparticles (AgNPs). The reaction process was simple and the formation of highly stable silver nanoparticles at room temperature were observed. The morphology and crystalline phase of the Lm-AgNPs were determined using UV-Visible spectroscopy (UV-vis), Transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) spectra. TEM studies showed that the average particle size of silver nanoparticles were in the range of 10 to 20 nm. The antifungal activity of Lm-AgNPs against Aspergillus flavus was also investigated and showed that the synthesized Lm-AgNPs has a remarkable potential as an antifungal agent in treating fungal diseases. © RJPT All right reserved. Source

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