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Wyszukujesz frazę "Emayavaramban, M." wg kryterium: Autor

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    Wyświetlanie 1-9 z 9
    Tytuł:
    Synthesis and Spectral Studies of Ru(II) Carbonyl Schiff Base Complexes
    Autorzy:
    Prabhakaran, B.
    Santhi, N.
    Emayavaramban, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/412248.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Schiff base
    ruthenium(II) complexes
    tetradentate ligands
    octahedral environment
    Opis:
    The synthesis and characterization of hexa co-ordinated ruthenium(II) complexes of the type [Ru(CO)(B)(L)] (where B = PPh3, AsPh3, py or pip and L = dibasic tetradentate Schiff base ligand) were synthesized from the reaction of [RuHCl(CO)(B)(EPh3)2] (where E = P, B = PPh3, py or pip, E = As, B = AsPh3) with different tetradentate ligands. The ligands were derived by the condensation of 5-chloro-4-methyl-2-hydroxy benzophenone with ethylenediamine, propylenediamine and o-phenylene-diamine in 1:1 molar ratio. All the compounds have been characterized by elemental analysis and spectral (FT-IR, UV-VIS and 1H-NMR) methods. An octahedral environment around Ru(II) ion has been tentatively proposed for all the complexes.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 3; 53-66
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bio synthesis and characterization of silver nanoparticles using Lagenaria siceraria leaf extract and their antibacterial activity
    Autorzy:
    Anandh, B.
    Muthuvel, A.
    Emayavaramban, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/412277.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    green synthesis
    silver nanoparticles
    Lagenaria siceraria
    antibacteriala activity
    Opis:
    The present investigation demonstrates the formation of silver nanoparticles by the reduction of the aqueous silver metal ions during exposure to the Lagenaria siceraria leaf extract. The synthesized AgNPs have characterized by UV-visible spectroscopy, X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) techniques. AgNPs formation has screened by UV-visible spectroscopy through colour conversion due to surface plasma resonance band at 427 nm. X-ray diffraction (XRD) confirmed that the resulting AgNPs are highly crystalline and the structure is face centered cubic (fcc). FT-IR spectrum indicates the presence of different functional groups present in the biomolecules capping the nanoparticles. Further, inhibitory activity of AgNPs and leaf extract were tested against human pathogens like gram-pastive (Staphylococcus aureus, Bacillus subtilis), gram-negative (Escherichia coli and Pseudomonas aeruginosa). The results indicated that the AgNPs showed moderate inhibitory actions against human pathogens than Lagenaria siceraria leaf extract, demonstrating its antimicrobial value against pathogenic diseases.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 19, 1; 35-45
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative study of adsorption phenomena of direct dye Black E by palm nut shell carbon and treated flash residue with respect to activated charcoal carbon
    Autorzy:
    Palanivel, C.
    Prabhakar, L.D.
    Emayavaramban, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/411986.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    adsorption phenomena
    palm nut shell carbon
    treated flyash residue
    direct dye Black E
    Opis:
    Many researchers1-3 aimed to study the removal of colouring matter from textile dyeing industrial effluent using the carbon derived from natural sources. Because adsorption of the dyes on carbon is easily, cost effective when comparing to the other techniques. Hence we aimed at the preparation and characterization of the carbon from the natural sources like palm nut shell and flyash. These carbons have been used for adsorption of direct dye Black E. The effect of pH, carbon dose and equilibration period were examined along within the Langmuir and Freundlich isotherm studies. The application of these carbons was investigated on adsorption and colour removal from effluent and synthetic samples, which consists of commercial direct dye Black E.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 2; 80-94
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of Palm Nut Shell Carbon and Treated Flyash Residue for Adsorption of Coloring Matter from Aqueous Systems
    Autorzy:
    Palanivel, C.
    Prabhakar, L.D.
    Emayavaramban, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/411991.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    adsorption
    colouring matter
    aqueous system
    PNSC
    Opis:
    The Palm Nut Shell Carbon (PNSC) and Treated Flyash Residue (TFR) has prepared by sulphuric acid process and characterized. The characterization studies includes determination of moisture, bulk density, pH, carbon soluble in water and acid, decolourising power, iron content, phenol number and surface area parameters. The characteristics of these carbons were compared with that of high cost activated charcoal carbon (ACC). The PNSC and TFR were used for adsorption of colouring matter from the textile dyeing industrial effluents.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 2; 72-79
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical evaluation of internal pressure in ternary and sub-binary liquid mixtures at various temperatures
    Autorzy:
    Madhumitha, J.
    Santhi, N.
    Alamelumangai, G.
    Emayavaramban, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/411846.pdf
    Data publikacji:
    2012
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    mieszanki ciekłe trójskładnikowe
    benzen
    heksan
    alkohol sec-butylowy
    ternary liquid mixtures
    sub-binary liquid mixtures
    benzene
    hexane
    sec-butyl alcohol
    Opis:
    The Internal pressures of Ternary and their sub-Binary liquid mixtures of benzene(1) + hexane(2) + sec-butyl alcohol(3) were calculated using density, velocity and molar refraction from the temperature range of 303.15K-318.15K. For the Binary liquid mixtures, the Experimental Internal pressure values were correlated through an equation proposed by Andiappan et.al. For the Ternary liquid mixture, the Experimental Internal pressure values were correlated through an equation proposed by us. The Experimental values and the Theoretical values are in close agrement with each other.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2012, 4; 82-95
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of internal pressure of liquids and liquid mixtures
    Autorzy:
    Santhi, N.
    Sabarathinam, P.
    Alamelumangai, G.
    Madhumitha, J.
    Emayavaramban, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/411696.pdf
    Data publikacji:
    2012
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    ciśnienie cieczy
    teoria Jacobsona
    pojemność cieczy
    równanie Srivastava i Berkowitza
    van der Waals
    pressure of liquids
    theory of Jacobson
    capacity of heat liquids
    equation of Srivastava and Berkowitz
    Opis:
    By combining the van der Waals' equation of state and the Free Length Theory of Jacobson, a new theoretical model is developed for the prediction of internal pressure of pure liquids and liquid mixtures. It requires only the molar volume data in addition to the ratio of heat capacities and critical temperature. The proposed model is simple, reliably accurate and capable of predicting internal pressure of pure liquids with an average absolute deviation of 4.24% in the predicted internal pressure values compared to those given in literature. The average absolute deviation in the predicted internal pressure values through the proposed model for the five binary liquid mixtures tested varies from 0.29% to 1.9% when compared to those of literature values.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2012, 5; 1-7
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ultrasonic study of molecular interaction in binary liquid mixtures of n-hexane with alcohols
    Autorzy:
    Santhi, N.
    Sabarathinam, P.
    Alamelumangai, G.
    Madhumitha, J.
    Emayavaramban, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/411698.pdf
    Data publikacji:
    2012
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    alkohol
    parametry akustyczne
    mieszaniny
    n-heksan
    n-hexane
    alcohol
    acoustical parameters
    mixtures
    Opis:
    Ultrasonic velocity, viscosity and density of alcohol[s] in n-hexane have been measured AT various temperatures in the range of 303.15 - 318.15K. From the experimental data, the acoustical parameters such as molar volume, adiabatic compressibility, intermolecular free length and their excess values have been computed and presented as functions of compositions. The deviations from ideality of the acoustical parameters are explained on the basis of molecular interactions between the components of the mixtures. The variations of these parameters with composition of the mixture suggest the strength of interactions in these mixtures.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2012, 5; 59-71
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis, Characterization and Anti-diabetic activity of 1,3,5-triaryl-2-pyrazolines in acetic acid solution under Ultrasound Irradiation
    Autorzy:
    Emayavaramban, M.
    Santhi, N.
    Gopi, C.
    Manivannan, C.
    Raguraman, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/412176.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Chalcone
    Pyrazoline
    ultrasound irradiation
    Anti-diabtic activity and Alloxan Monohydrate
    Opis:
    A chalcone was prepared by the reaction of 4-methylbenzaldehyde with 4-methylacetophenone in dilute methanolic sodium hydroxide solution under ultrasonic irradiationin the water bath of an ultrasonic cleaner at room temperature. Treatment of this chalcone with thiosemicarbazide / semicarbazide hydrochloride / benzhydrazide / benzenesulphonyl hydrazide / phenylhydrazine hydrochloride afforded the corresponding 2-pyrazoline in good yields. All the new compounds have been characterized by IR, 1H-NMR, 13CNMR spectral data. All the target compounds were evaluated for their in-vivo anti - diabetic activity in rates in comparison with as reference drug.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 9, 2; 172-185
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical Evaluation of Ultrasonic Velocity in Binary Liquid Mixtures of Alcohols [S] + Benzene
    Autorzy:
    Santhi, N.
    Sabarathinam, P. L.
    Madhumitha, J.
    Alamelumangai, G.
    Emayavaramban, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/411951.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    alcohols
    benzene
    sound
    mixtures
    NR
    IMR
    FLT
    CFT
    Opis:
    Ultrasonic velocities and densities of the binary liquid mixtures of benzene with 1-propanol, 2-propanol, 1-butanol, 2-butanol and 3-butanol at 303.15 to 318.15 K, over the entire composition range were measured. The theoretical values of ultrasonic velocity were evaluated using the Nomoto’s Relation (NR), Ideal Mixture Relation (IMR), Free Length Theory (FLT) and Collision Factor Theory (CFT). The validity of these relations and theories were tested by comparing the computed sound velocities with experimental values. Further, the molecular interaction parameter (á) was computed by using the experimental and the theoretical ultrasonic velocity values. The variation of this parameter with composition of the mixtures has been discussed in terms of molecular interaction in these mixtures.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 2; 18-35
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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