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Azhagan M.V.K.,CSIR - National Chemical Laboratory | Vaishampayan M.V.,CSIR - National Chemical Laboratory | Shelke M.V.,CSIR - National Chemical Laboratory | Shelke M.V.,Academy of Scientific and Innovative Research AcSIR
Journal of Materials Chemistry A | Year: 2014

Electrode materials with efficient capabilities for ionic and electronic transport are key to high performance supercapacitors. Here, we demonstrate a simple and comparatively low temperature synthesis of functionalized multilayer fullerenes so called carbon nano-onions (CNOs) as the electrode for high performance electrochemical supercapacitors. The exohedral type supercapacitor formed due to nonporous CNOs showed higher specific capacitance than conventional graphitic/mesoporous/activated carbons. Surface redox functionalities of these CNOs add up to significant pseudocapacitance. Further in situ incorporation of MnO2 nanoparticles to these CNOs increased the specific capacitance up to 1207 F g-1, which is close to the theoretical value of pseudocapacitive MnO2. © 2014 The Royal Society of Chemistry.

Kumaraswamy G.,Indian Institute of Chemical Technology | Kumaraswamy G.,Academy of Scientific and Innovative Research AcSIR | Raju R.,Indian Institute of Chemical Technology
Advanced Synthesis and Catalysis | Year: 2014

Aerobic dehydrogenative sulfenylation of H-phosphonites, and phosphine oxides with aryl/alkylsulfonyl hydrazides catalyzed by a sub-stoichiometric amount of copper iodide has been accomplished. This protocol is compatible with functional groups, and results in various thiophosphate derivatives in good to high yields. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Chaturvedi R.K.,Indian Institute of Toxicology Research | Chaturvedi R.K.,Academy of Scientific and Innovative Research AcSIR | Beal M.F.,Cornell University
Free Radical Biology and Medicine | Year: 2013

Neurodegenerative disorders are debilitating diseases of the brain, characterized by behavioral, motor and cognitive impairments. Ample evidence underpins mitochondrial dysfunction as a central causal factor in the pathogenesis of neurodegenerative disorders including Parkinson's disease, Huntington's disease, Alzheimer's disease, Amyotrophic lateral sclerosis, Friedreich's ataxia and Charcot-Marie-Tooth disease. In this review, we discuss the role of mitochondrial dysfunction such as bioenergetics defects, mitochondrial DNA mutations, gene mutations, altered mitochondrial dynamics (mitochondrial fusion/ fission, morphology, size, transport/trafficking, and movement), impaired transcription and the association of mutated proteins with mitochondria in these diseases. We highlight the therapeutic role of mitochondrial bioenergetic agents in toxin and in cellular and genetic animal models of neurodegen-erative disorders. We also discuss clinical trials of bioenergetics agents in neurodegenerative disorders. Lastly, we shed light on PGC-1α, TORC-1, AMP kinase, Nrf2-ARE, and Sirtuins as novel therapeutic targets for neurodegenerative disorders. © 2013 Elsevier Inc. All rights reserved.

Chakraborty D.,Indian Institute of Technology Bombay | Choudhury D.,Indian Institute of Technology Bombay | Choudhury D.,Academy of Scientific and Innovative Research AcSIR
Ocean Engineering | Year: 2014

The stability analysis has been carried out for generalized non-vertical waterfront retaining wall supporting inclined backfill under combined action of earthquake and tsunami forces. Closed-form design solutions for factor of safety against sliding have been obtained using limit equilibrium method. For estimating seismic passive earth pressure and the wall inertia force, the pseudo-dynamic approach has been adopted. Different methods available in literature are used to estimate tsunami wave pressure and hydrodynamic pressure. It has been observed that parameters like seismic accelerations in both horizontal and vertical directions, time period, soil and wall friction angles, wall batter, ground inclination, pore pressure ratio, tsunami wave height have significant effect on the sliding stability of the waterfront retaining wall under combined action of earthquake and tsunami. Comparison of results with available results in literature for special case of vertical waterfront retaining wall supporting horizontal backfill has indicated a very good agreement. It is expected that the proposed design charts and tables presented in this paper will be helpful for the design engineers to design waterfront retaining wall against sliding mode of failure under combined action of earthquake and tsunami. © 2013 Elsevier Ltd.

Nepak D.,Academy of Scientific and Innovative Research AcSIR | Darbha S.,CSIR - National Chemical Laboratory
Catalysis Communications | Year: 2014

The catalytic application of Au-Pd nanoparticles supported on sodium titanate nanotubes (NaTNTs) for liquid-phase aerobic oxidation of alcohols is reported, for the first time. This reaction occurs at 80-120 °C, 1 atm and solvent-/alkali-free conditions yielding the corresponding carbonyls in high selectivity. This catalyst was reusable and found to be more active/selective than the corresponding monometallic Au and Pd catalysts and Au-Pd/TiO2. Higher dispersion, smaller particle size and higher amount of electron density at gold are the causes for the superior activity of Au-Pd/NaTNT catalyst. © 2014 Elsevier B.V.

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