National Institute of Technology Calicut

About: National Institute of Technology Calicut is a education organization based out in Kozhikode, Kerala, India. It is known for research contribution in the topics: Computer science & Control theory. The organization has 3627 authors who have published 4638 publications receiving 50830 citations. The organization is also known as: Calicut Regional Engineering College & NIT Calicut.

High-Performance Composite From Epoxy and Glass Fibers: Morphology, Mechanical, Dynamic Mechanical, and Thermal Analysis

Abstract: Diglycidyl ether of bisphenol-A type epoxy resin cured with diamino diphenyl sulfone was used as the matrix for fiber-reinforced composites to get improved mechanical and thermal properties for the resulting composites. E-glass fiber was used for fiber reinforcement. The morphology, tensile, flexural, impact, dynamic mechanical, and thermal properties of the composites were analyzed. The tensile, flexural, and impact properties showed dramatic improvement with the addition of glass fibers. Dynamic mechanical analysis was performed to obtain the Tg of the cured matrix as well as the composites. The improved thermal stability of the composites was clear from the thermogravimetric analysis. Scanning electron micrographs were taken to understand the interfacial adhesion between the fiber and the matrix. The values of mechanical properties were compared with modified epoxy resin composite system. Predictive models were applied using various equations to compare the mechanical data obtained theoretically and experimentally. POLYM. COMPOS., 2009. © 2008 Society of Plastics Engineers

A molecular dynamics study to determine the solid-liquid interfacial tension using test area simulation method (TASM).

Abstract: Molecular dynamics (MD) studies on heat transfer from a heated nanoparticle into the surrounding fluid have indicated that the fluid next to a spherical nanoparticle can get heated well above its boiling point without observing a phase change, while a contradicting behavior was observed for a flat surface-fluid interface. Another interesting observation is that the critical heat flux was found to increase with increase in the wetting characteristics of solid. Thus, the interfacial tension or free energy of solid-liquid interface could play a pivotal role in the mechanism of heat transfer. A recent study by Gloor et al. [J. Chem. Phys. 123, 134703 (2005)]10.1063/1.2038827 has proposed test area simulation method (TASM) for the determination of interfacial tension. The present study involves the determination and the comparison of solid-liquid interfacial tension for planar and spherical interfaces using MD based on TASM and analyze the results. A higher interfacial tension value is observed for spherical n...

Nanotechnology based diagnostic and therapeutic strategies for neuroscience with special emphasis on ischemic stroke.

Abstract: Ischemic stroke is the second leading cause of death and long-term disability worldwide, for which no effective therapies are available. The increasing prevalence of ischemic stroke and related health risks, combined with the lack of effective therapies, highlight the desperate need for continued research for exploring the safe and effective drugs, which favourably influence multiple pathways leading to neuroprotection and extend the benefit to a larger number of patients diagnosed with stroke. Numerous preclinical studies have reported very promising results using "neuroprotectants", all of which have failed at clinical trials because of either safety issues or lack of efficacy. The delivery of many potentially therapeutic neuroprotectants and diagnostic compounds to specific areas of the brain is restricted by the blood-brain barrier (BBB). Nanoparticles (NPs) have colossal applications that could revolutionize the treatment of ischemic stroke. NPs can readily transmigrate across the BBB without compromising its integrity. Recent striking developments in nanotechnology have produced a great deal of nano-devices, which could be used for the treatment and neuronal regeneration following ischemic stroke. This article attempts to convey the untapped potentials of nanopharmaceuticals for the treatment of ischemic stroke. Looking towards the future, this review focuses on the potential applications of nanoparticulate systems for the delivery of therapeutic cargo into the brain for imparting neuroprotection against ischemic stroke. This review also provides an overview of targeted NPs, which are being used for imaging, neuroprotection and regeneration of ischemic brain.

Study of third-order optical nonlinearities of substituted hydrazones in PMMA

Abstract: We investigated the third-order nonlinear optical properties of donor–acceptor substituted hydrazones doped into PMMA matrix using single beam Z-scan technique at 532 nm. The magnitude of third-order susceptibility, χ(3) is of the order of 10−13esu. The nonlinear refractive index, n2 and the molecular second order hyperpolarisability, γh are of the order of 10−11esu and 10−32esu, respectively. The compounds exhibit larger third-order NLO properties in PMMA host when compared to the pure compounds. The study reveals that these hydrazones are a good candidate of nonlinear optical materials for photonic applications. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011