P. Srivatsan

Sri Venkateswara College of Engineering, Sriperumbubur, Tamil Nādu, India

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Publications (4)8.07 Total impact

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    ABSTRACT: Indiscriminate and increased use of silver nanoparticles (SNPs) in consumer products leads to the release of it into the environment. The fate and transport of SNPs in environment remains unknown. We have studied the interaction of SNPs with extracellular protein (ECP) produced by two environmental bacterial species and the adsorption behavior in aqueous solutions. The effect of pH and salt concentrations on the adsorption was also investigated. The adsorption process was found to be dependent on surface charge (zeta potential). The capping of SNPs by ECP was confirmed by Fourier transform infrared spectroscopy and X-ray diffraction. The adsorption of ECP on SNPs was analyzed by Langmuir and Freundlich models, suggesting that the equilibrium adsorption data fitted well with Freundlich model. The equilibrium adsorption data were modeled using the pseudo-first-order and pseudo-second-order kinetic equations. The results indicated that pseudo-second-order kinetic equation would better describe the adsorption kinetics. The capping was stable at environmental pH and salt concentration. The destabilization of nanoparticles was observed at alkaline pH. The study suggests that the stabilization of nanoparticles in the environment might lead to the accumulation and transport of nanomaterials in the environment, and ultimately destabilizes the functioning of the ecosystem.
    Journal of hazardous materials 06/2011; 192(1):299-306. · 4.14 Impact Factor
  • Journal of Hazardous Materials 01/2011; · 3.93 Impact Factor
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    ABSTRACT: Cache design for high performance computing requires the realization of two seemingly disjoint goals of higher hit ratios at reduced access times. Recent research advocates the use of "resizable" caches to exploit cache requirement variability in programs. Existing schemes for resizable caches effectively employ either of the two fundamentally different methods: by changing the cache organization itself or by using a proper resizing strategy, that is, either static or dynamic resizing. Our paper looks at a new dynamic resizing strategy that aims at run time manipulation of the cache parameters to improve its performance. Two algorithms for dynamic reconfiguration are proposed and the results explained.
    Digital System Design, 2003. Proceedings. Euromicro Symposium on; 10/2003
  • Pavithra Srivatsan, N Aravindha Babu
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    ABSTRACT: Supernumerary teeth are a relatively frequent disorder of odontogenesis characterized by an excess number of teeth. Mesiodens is the most common type of supernumerary tooth found in the premaxilla between the two central incisors. They can be supplemental (resembling natural teeth), conical, tuberculate or molariform. We present the case of a 19 year-old girl who presented with a mesiodens of an unusual morphology and multiple impacted supernumerary teeth not associated with any syndrome.
    Indian Journal of Dental Research 18(3):138-40.