g) 2018-Scopus Open Access (PDF)

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    PSIDIUM GUAJAVA: A NOVEL PLANT IN THE SYNTHESIS OF SILVER NANOPARTICLES FOR BIOMEDICAL APPLICATIONS
    (Innovare Academic Sciences Pvt Ltd, 2018) Sharmila, C; Ranjith Kumar, R; Chandar Shekar, B
    Synthesis of silver nanoparticles (AgNPs) using a simple, cost-effective and environmentally friendly green route approach and to study the antibacterial activity of AgNPs against human pathogens.
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    VIRTUAL SCREENING OF TREATED PISTACHIO VERA SHELL POWDER AS A POTENTIAL SORBENT IN SEQUESTERING UBIQUITOUS DIVALENT METAL IONS FROM AQUEOUS MATRICES
    (Oriental Journal of Chemistry, 2018) Shyamala Devi, N; Muthulakshmi Andal, N; Vivithabharathi, K
    Water pollution due to noxious heavy metals such as Hg(II), Cr(VI), Cd(II) and Pb(II) ions etc., has been tremendously focused gaining attention towards social benefit. Increasing concentrations of these metals into the ecosystem constitute a severe health hazard due to their toxicity, accumulation and bio-magnification throughout the food chain. Lead contamination of drinking water is a great threat through varied sources viz., lead pipes, plating units etc. Pistachio vera shell (PVS) is a hard layer that surrounds the delicious kernel of the nut. The current work evaluates the feasibility of powdered Pistachio vera shell (PVSP) - a biowaste for sequestering Pb (II) ions is treated with 0.1N HCl and 0.1N NaOH to enhance its sorption efficacy (TPVSP). SEM, FTIR and microscopic analyses are recorded for characterising the chosen sorbent. Batch experimental studies are performed to assess the equilibration between the sorbate and the sorbent. The competence of the sorbent material is experimentally verified through various operating factors viz., particle size and dosage of TPVSP, agitation time interval between TPVSP and Pb(II) ions, initial concentrations of Pb(II) ions, pH of the adsorption medium, effects of cations, anions, co-ions and influence of temperatures on Pb(II) – TPVSP system. The residual concentrations of Pb (II) ions from aqueous solutions are analysed using Atomic Absorption Spectrophotometer (Shimadzu-AA-6200). Langmuir and Freundlich models are applied to describe the adsorption capacity. Column studies are conducted to ensure the quantitative estimation of TPVSP in trapping 99% of sorbate species at a dose of 40 mg the flow rate being, 100 ml/10 min. assuring the bulkiness of the material.
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    MACROCYCLIC COMPOUNDS AS GREEN CORROSION INHIBITORS FOR ALUMINIUM: ELECTROCHEMICAL, SURFACE AND QUANTUM CHEMICAL STUDIES
    (International Journal of Corrosion and Scale Inhibition, 2018-09-28) Ansari, K R; Ramkumar, S; Chauhan, D S; Salman, MD; Nalini, D; Srivastava, V; Quraishi, M A
    In the present work, two macrocyclic compounds namely 5,6,11,12-tetramethyl1,2,4,7,8,10 hexaazacyclododeca-4,6,10,12-tetraene-3,9-dithione (TMCD) and 5,6,11,12- tetraphenyl-1,2,4,7,8,10-hexaazacyclododeca-4,6,10,12-tetraene-3,9-dithione (TMPD) have been synthesized and for the first time reported as inhibitors against the corrosion of aluminium in 1 M hydrochloric acid. The synthesized compounds were characterized using 1H NMR and 13C NMR. The corrosion inhibition behaviour of TMCD and TMPD was studied using gravimetric measurements, electrochemical impedance spectroscopy and potentiodynamic polarization studies. The surface analysis was carried out using AFM and SEM. Theoretical studies on the adsorption behaviour of inhibitor were carried out using the Density Functional Theory method. A detailed study of the effect of temperature and the influence of immersion time is presented using weight loss technique. Potentiodynamic polarization study proves that the corrosion inhibition efficiencies of TMCD and TMPD at 400 mg L –1 concentration are 97.30% and 89.71% respectively. Both the inhibitors behaved as mixed type but exhibit cathodic predominance. The results of EIS-Nyquist plots show inductive behavior at low frequency characteristic of the electrochemical behaviour of aluminium. The increase in polarization resistance with concentration suggests the adsorption and corrosion inhibition behaviour for both TMCD and TMPD. The AFM studies reveal a considerable decrease in surface roughness in the presence of inhibitors compared to blank sample and the SEM images show a highly smooth surface of the metal sample in the presence of inhibitors. The Fukui functions, global softness and Mulliken charges reveal that the sites for electrophilic attack are the hetero atoms. The frontier molecular orbital energies, the molecular orbital energy gap and the other quantum
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    AN EFFICIENT CONVOLUTIONAL NEURAL NETWORK BASED CLASSIFIER TO PREDICT TAMIL WRITER
    (Periodicals of Engineering and Natural Sciences, 2018-06) Thendral, Tharmalingam; Vijaya, Vijayakumar
    Identification of Tamil handwritten calligraphies at different levels such as character, word and paragraph is complicated when compared to other western language scripts. None of the existing methods provides efficient Tamil handwriting writer identification (THWI). Also offline Tamil handwritten identification at different levels still offers many motivating challenges to researchers. This paper employs a deep learning algorithm for handwriting image classification. Deep learning has its own dimensions to generate new features from a limited set of training dataset. Convolutional Neural Networks (CNNs) is one of deep, feed-forward artificial neural network is applied to THWI. The dataset collection and classification phase of CNN enables data access and automatic feature generation. Since the number of parameters is significantly reduced, training time to THWI is proportionally reduced. Understandably, the CNNs produced much higher identification rate compared with traditional ANN at different levels of handwriting
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    ANTIPYRETIC POTENTIAL OF AQUEOUS LEAF EXTRACT OF ANNONA MURICATA.L AND SPERMACOCE ARTICULARIS. L.F. ON YEAST-INDUCED PYREXIA IN RATS
    (2018-03-03) Maruvoor Arasi, K; Krishnaveni, C
    The objective of this study is to evaluate the potential of in vivo antipyretic activity of the aqueous leaf extracts of Annona muricata L. and Spermacoce articularis. L.f.
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    GAS CHROMATOGRAPHY AND MASS SPECTROMETRY OF THE ETHANOLIC EXTRACT OF NEST MATERIAL OF MUD DAUBER WASP, SCELIPHRON CAEMENTARIUM
    (Innovare Academic Sciences Pvt Ltd, 2018-04-06) Susheela, P; Rosaline, Mary; Radha, R
    The objective of the present study was to determine the chemical compounds present in the nests of the mud dauber wasp, Sceliphron caementarium
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    SORET AND HALL EFFECT ON UNSTEADY FREE CONVECTION FLOW PAST AN INFINITE VERTICAL PLATE WITH OSCILLATORY SUCTION VELOCITY AND VARIABLE PERMEABILITY
    (International Information and Engineering Technology and Association, 2017-08-21) Panneerselvi, Rangasamy; Nagarathinam, Murugesan
    An unsteady, two dimensional, free convection flow with heat and mass transfer of a viscous, incompressible, electrically conducting fluid past an infinite vertical porous plate of time dependent permeability with oscillatory suction velocity and chemical reaction in the presence of Hall current effect and Soret effect is investigated. A uniform magnetic field is applied normal to the direction of flow. The dimensionless governing equations are solved using perturbation technique in Eckert number. Numerical evaluation of the analytical solutions is carried out for the velocity field, temperature distribution and concentration distribution. The results obtained are discussed for various emerging parameters such as Prandtl number (Pr), Grashof number (Gr), Modified Grashof number (Gm), Soret number (Sr), Schmidt number (Sc), Sink strength parameter (S), Eckert number (Ec), and Hall parameter (m) encountered in the problem under investigation.
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    EVALUATION OF IN VITRO ANTIOXIDANT ACTIVITY OF A MEDICINAL HERB, WEDELIA CHINENSIS (OSBECK) MERRILL.
    (Innovare Academic Sciences Pvt Ltd, 2018-10-10) Rehana Banu, H; Nagarajan, N
    The objective is to evaluate the antioxidant activity of the methanolic leaf extract of Wedelia chinensis.
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    EXPONENTIAL STABILITY BEHAVIOR OF NEUTRAL STOCHASTIC INTEGRODIFFERENTIAL EQUATIONS WITH FRACTIONAL BROWNIAN MOTION AND IMPULSIVE EFFECTS
    (Springer Open, 2018-03-27) Yong-Ki, Ma; Arthi, G; Marshal Anthoni, S
    In this paper, by employing the fractional power of operators, semigroup theory, and fixed point strategy we obtain some new criteria ensuring the existence and exponential stability of a class of impulsive neutral stochastic integrodifferential equations driven by a fractional Brownian motion. We establish some new sufficient conditions that ensure the exponential stability of mild solution in the mean square moment by utilizing an impulsive integral inequality. Also, we provide an example to show the efficiency of the obtained theoretical result.