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

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    Wyświetlanie 1-13 z 13
    Tytuł:
    Floral morphology and HPTLC fingerprint profile of Saraca asoca (Roxb.) De Wilde (Caesalpiniaceae): A consecrated tree of India
    Autorzy:
    Mishra, S.B.
    Vijayakumar, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/11140.pdf
    Data publikacji:
    2015
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    Pharmacognosy of the flowers of Saraca asoca (Roxb.) De Wilde has been carried out to lay down standards for the genuine drug Ashoka with the detailed anatomy of various floral appendages. The aim of the present study is to determine the physico-chemical profile, preliminary phytochemical screening, fluorescence analysis and chemical composition by HPTLC of the medicinally important plant Saraca asoca. These observations would be of immense value in the botanical identification and standardization of the drug in crude form. This study would help distinguish the drug from its other species.
    Źródło:
    International Letters of Natural Sciences; 2015, 43
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Solar photovoltaic interconnected ZSI-unified power quality conditioner to enhance power
    Autorzy:
    Raja, A.
    Vijayakumar, M.
    Karthikeyan, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/2173533.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Z-source inverter
    photovoltaic
    power quality
    unified power quality conditioner
    UPQC
    total harmonic distortion
    falownik typu Z
    fotowoltaika
    jakość energii
    zunifikowany kondycjoner jakości energii
    współczynnik zawartości harmonicznych
    Opis:
    In order to ensure that all the connected Equipment in the distribution network operates smoothly, the voltage stability of photovoltaic (PV) integrated distribution systems is very important. Sustaining the voltage profile when integrating PV is a particularly difficult issue. The primary goal of this article is to provide a consistent voltage profile to a sensitive load. A three-phase PV integrated distribution system has been chosen for investigation. An innovative feature of this system is that UPQC DVR and STATCOM systems are powered by Z-source inverters instead of traditional inverters. The ability to actively decouple power is the primary benefit of utilizing a Z-source inverter. The objective of the study effort is to use this new UPQC to synchronize a solar PV system with the distribution system. For the UPQC with battery energy storage system (BESS), the research study examines and develops the most appropriate control approach. A UPQC is a device that is used to integrate solar panels and improve the voltage stability of the distribution system. The prototype model is being developed, and the experimental findings confirm the main objective.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 1; e140015, 1--10
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Power Domination in Knödel Graphs and Hanoi Graphs
    Autorzy:
    Varghese, Seethu
    Vijayakumar, A.
    Hinz, Andreas M.
    Powiązania:
    https://bibliotekanauki.pl/articles/16647915.pdf
    Data publikacji:
    2018-02-01
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    domination
    power domination
    Knödel graph
    Hanoi graph
    Opis:
    In this paper, we study the power domination problem in Knödel graphs WΔ,2ν and Hanoi graphs $H_p^n $. We determine the power domination number of W3,2ν and provide an upper bound for the power domination number of Wr+1,2r+1 for r ≥ 3. We also compute the k-power domination number and the k-propagation radius of $H_p^2$.
    Źródło:
    Discussiones Mathematicae Graph Theory; 2018, 38, 1; 63-74
    2083-5892
    Pojawia się w:
    Discussiones Mathematicae Graph Theory
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Power Domination in Knödel Graphs and Hanoi Graphs
    Autorzy:
    Varghese, Seethu
    Vijayakumar, A.
    Hinz, Andreas M.
    Powiązania:
    https://bibliotekanauki.pl/articles/31342442.pdf
    Data publikacji:
    2018-02-01
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    domination
    power domination
    Knödel graph
    Hanoi graph
    Opis:
    In this paper, we study the power domination problem in Knödel graphs $ W_{ \Delta,2 \nu } $ and Hanoi graphs $ H_p^n $. We determine the power domination number of $ W_{3,2 \nu } $ and provide an upper bound for the power domination number of $ W_{r+1,2^{r+1}} $ for $ r \ge 3 $. We also compute the $k$-power domination number and the k-propagation radius of $ H_p^2 $.
    Źródło:
    Discussiones Mathematicae Graph Theory; 2018, 38, 1; 63-74
    2083-5892
    Pojawia się w:
    Discussiones Mathematicae Graph Theory
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biosorption of aniline blue from aqueous solution using a novel biosorbent Zizyphus oenoplia seeds: Modeling studies
    Autorzy:
    Kumar, M.
    Elangovan, G
    Tamilarasan, R
    Vijayakumar, G.
    Mukeshkumar, P. C.
    Sendhilnathan, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/778750.pdf
    Data publikacji:
    2015
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    aniline blue
    removal
    biosorption
    Zizyphus oenoplia seed
    modeling
    Opis:
    This article presents the feasibility for the removal of Aniline Blue dye (AB dye) from aqueous solution using a low cost biosorbent material Zizyphus oenoplia seeds. In this study, a batch mode experiments of the adsorption process were carried out as a function of pH, contact time, concentration of dye, adsorbent dosage and temperature. The experimental data were fitted with Freundlich and Langmuir isotherm equations. The feasibility of the isotherm was evaluated with dimensionless separation factor (RL). The kinetic data of sorption process are evaluated by using pseudo-first order and pseudo-second order equations. The mode of diffusion process was evaluated with intra-particle diffusion model. The thermodynamic parameters like change in enthalpy (ΔHº); change in entropy (ΔSº) and Gibbs free energy change (ΔGº) were calculated using Van’t Hoff plot. The biosorbent material was characterized with Fourier Transform Infrared (FTIR) spectroscopy and the morphology was identified with Scanning Electron Microscope (SEM) in before and after adsorption of AB dye.
    Źródło:
    Polish Journal of Chemical Technology; 2015, 17, 3; 70-77
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and LFER study of some substituted hydrazones
    Autorzy:
    Vijayakumar, R.
    Rajarajan, M.
    Senbagam, R.
    Balaji, S.
    Manikandan, V.
    Vanangamudi, G.
    Thirunarayanan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1182767.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Hydrazones and substituent effect
    LFER study
    Synthesis
    Opis:
    A series containing ten substituted hydrazones have been synthesized by condensation between semicarbazide and various substituted benzaldehydes. The hydrazones were confirmed by their physical constants and UV, IR, 1H NMR and 13C NMR spectral data. This UV, IR, 1H NMR and 13C NMR spectral data have been used for LFER studied with Hammett constants and Swain-Lupton’s parameters.
    Źródło:
    World Scientific News; 2017, 66; 263-280
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis, and spectral Hammett correlation analysis of some (E)-1-(5-chloro-2-hydroxyphenyl)-3-phenylprop-2-en-1-one compounds
    Autorzy:
    Balaji, S.
    Vijayakumar, R.
    Manikandan, V.
    Senbagam, R.
    Rajarajan, M.
    Vanangamudi, G.
    Thirunarayanan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1182925.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    (e)-5-chloro-2-hydroxyphenyl chalcones
    synthesis
    uv
    ir and nmr spectra
    hammett correlation analysis
    substituent effect
    Opis:
    A series of substituted of (E)-1-(5-chloro-2-hydroxyphenyl)-3-phenylprop-2-en-1-one compounds by cross-aldol condensation reaction of 5-chloro-2-hydroxy acetophenone with various substituted benzaldehyde in the presence sodium hydroxide (base). The synthesized substituted (E)-1-(5-chloro-2-hydroxyphenyl)-3-phenylprop-2-en-1-one compounds was characterized by physical constants, UV, FT-IR, 1H & 13C-NMR spectral data. All the spectral data of substituted (E)-1-(5-chloro-2-hydroxyphenyl)-3-phenylprop-2-en-1-one compounds has been Hammett correlation with linear regression analyses.
    Źródło:
    World Scientific News; 2016, 49, 2; 144-161
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and antimicrobial activity of substituted (E)-1-(4-fluoro-3-methylphenyl)-3-phenylprop-2-en-1-one compounds
    Autorzy:
    Balaji, S.
    Senbagam, R.
    Rajarajan, M.
    Vijayakumar, R.
    Manikandan, V.
    Vanangamud, G.
    Thirunarayanan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1189942.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Antibacterial activity
    Antifungal activity
    Bacillus subtilis
    vibrio cholera
    Opis:
    In an effort to develop antimicrobial agents, a series of substituted (E)-1-(4-fluoro-3-methylphenyl)-3-phenylprop-2-en-1-one compounds were synthesized by crossed-aldol condensation reaction of 4-fluoro-3-methyl acetophenone with various substituted benzaldehydes in the presence of sodium hydroxide. The synthesized compounds were characterized by means of their UV, IR and NMR spectral data. The synthesized substituted (E)-1-(4-fluoro-3-methylphenyl)-3-phenylprop-2-en-1-one compounds were tested for their antibacterial and antifungal activities by the Bauer-Kirby disc diffusion method.
    Źródło:
    World Scientific News; 2016, 52; 14-30
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis, Assessment of substituent effect and Antimicrobial activities of some substituted (E)-N-benzylidene-4H-1,2,4-triazol-4-amines
    Autorzy:
    Senbagam, R.
    Rajarajan, M.
    Vijayakumar, R.
    Manikandan, V.
    Balaji, S.
    Vanangamudi, G.
    Thirunarayanan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1194005.pdf
    Data publikacji:
    2015
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    IR and NMR spectra
    QSAR study
    UV
    antimicrobial study
    heterocyclic Schiff bases
    synthesis
    Opis:
    Schiff H., Justus Liebigs Annalen der Chemie. 131(1) (1864) 118-9. [2] Lau K. Y., Mayr A., Cheung K. K., Inorgnic Chimica Acta. 285 (1999) 223-232. [3] Shawali A. S., Harb N. M. S., Badahdah K. O., Journal of Heterocyclic Chemistry. 22 (1985) 1397-1403. [4] Gupta K. C., Sutar A. K., Coordination Chemistry Review. 252 (2008) 1420-1450. [5] Yuan M., Zhao F., Zhang W., Wang Z. M., Gao S., Inorgnic Chemistry. 46 (2007) 11235-42. [6] Nakaic T., Meddu S., Kurahashi T., Japan Patent. 7389932 (1973); Chemical Abstracts. 81(1974) 65182. [7] Quraishi Harion M. A., Sharma K., Journal of Materials Chemistry and Physics. 78 (2002) 18-21. [8] Ramesh S., Rajeshwari S., Elctrochimica Acta. 49 (2004) 811-820. [9] Colter R. J., Matzner M., Ring terming poly, Part B-1, ‘Heterocyclic Ring’ Academic, New Youk, (1972). [10] Popp. F. D., Journal of Organic Chemistry. 26 (1961) 1566-1568. [11] Rao X., Huang X., He L., Song J., Song Z., Shang S., Combinatorial Chemistry & High Throughput Screening. 15 (2012) 840-844. [12] Hadjipavlou-litina D. J., Geronikaki A. A., Letters in Drug Design & Discovery. 15 (1996) 199-206. [13] Tiwary M., Naik S. N., Tiwari D. K., Mittal P. K., Yadav S., Journal of vector Brone Diseases. 44 (2007) 198-204. [14] Solak N., Rollas S., Arkivoc. (2006) 173-181. [15] Wadher S. J., Puranik M. P., Karande N. A., Yeole P. G., International Journal of Pharm Tech Research 1 (2009) 22-33. [16] Cates A. L., Rasheed S. M., Pharmaceutical Research 6 (1984) 271-273. [17] Sakthinathan S. P., Suresh R., Mala V., Sathiyamoorthi K., Kamalakkannan D., Ranganathan K., John Joseph S., Vanangamudi G., Thirunarayanan G., International Journal of Scientific Research and Knowledge, 1(11) (2013) 472. [18] Sakthinathan S. P., Suresh R., Mala V., Sathiyamoorthi K., Kamalakkannan D., Ranganathan K., Arulkumaran R., Vijayakumar S., Sundararajan R., Vanangamudi G., Thirunarayanan G., International Letters of Chemistry, Physics and Astronomy. 6 (2013) 77. [19] Suresh R., Kamalakkannan D., Ranganathan K., Arulkumaran R., Sundararajan R., Sakthinathan S. P., Vijayakumar S., Sathiyamoorthi K., Mala V., Vanangamudi G., Thirumurthy K., Mayavel P., Thirunarayanan G., Spectrochim. Acta, 101A (2013) 239. [20] Arulkumaran R., Vijayakumar S., Sakthinathan S.P., Kamalakkannan D., Ranganathan K., Suresh R., Sundararajan R., Vanangamudi G., Thirunarayanan G., Journal of Chilean Chemical Society. 2 (2013) 58. [21] Thirunarayanan G., Gopalakrishnan M., Vanangamudi G., Spectrochemica Acta 67A (2007)1106-1112 [22] Swain C. G., Lupton E. C., Journal of American Chemical Society. 90 (1968) 4328-4337. [23] Bauer A. W., Kirby W. M. M., Sherris J. C., Truck M., American Journal of Clinical Pathology. 45 (1966) 493-498.
    Źródło:
    World Scientific News; 2015, 8; 176-191
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and correlation analysis of spectral data of some (E)-2-benzylidenehydrazine carbothioamides
    Autorzy:
    Vijayakumar, R.
    Rajarajan, M.
    Balaji, S.
    Manikandan, V.
    Senbagam, R.
    Vanangamudi, G.
    Thirunarayanan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1194021.pdf
    Data publikacji:
    2015
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Benzaldehyde
    Hydrazones
    IR & NMR spectral data and substituent effect
    Thiosemicarbazide
    UV-Vis
    Opis:
    A series containing ten substituted (E)-2-benzylidenehydrazinecarbothioamide were synthesized by condensation between thiosemicarbazide and various substituted benzaldehydes. The synthesized (E)-2-benzylidenehydrazinecarbothioamide were characterized by their physical constants and spectral data. The UV C=N λmax (nm), infrared ν C=N (cm-1), 1H NMR δ (CH= N) and 13C δ (C=N) spectral data have been correlated with Hammett substituent constants and F and R parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effect of substituents on the above Spectral data has been studied.
    Źródło:
    World Scientific News; 2015, 9; 70-87
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis, spectral studies and antimicrobial activities of some substituted (E)-1-benzylidene-2-(4-bromophenyl)hydrazines
    Autorzy:
    Rajarajan, M.
    Senbagam, R.
    Vijayakumar, R.
    Manikandan, V.
    Balaji, S.
    Vanangamudi, G.
    Thirunarayanan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1194024.pdf
    Data publikacji:
    2015
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Antimicrobial study
    Hammett equation
    Hydrazone
    IR spectra
    NMR spectra
    Synthesis
    UV
    Opis:
    A series of nine number of (E)-1-benzylidene-2-(4-bromophenyl)hydrazine compounds have been synthesized by the condensation reaction of 4-bromo phenylhydrazine with varies m- and p- substituted benzaldehydes using acetic acid catalyst were refluxed for 4h with 20 mL of absolute ethanol. The yield of synthesized (E)-1-benzylidene-2-(4-bromophenyl)hydrazine compounds are more than 80%. The synthesized (E)-1-benzylidene-2-(4-bromophenyl)hydrazines have been characterized by UV, IR, 1H and 13C spectral data. These UV, IR and NMR spectral data have been correlated with varies Hammett substituted constant and Swain-Lupton F and R parameters using single and multi- regression analysis. From the results of statistical analysis, the effects of substituent have been studied. The antimicrobial activity of all the synthesized substituted (E)-1-benzylidene-2-(4-bromophenyl)hydrazines have been evaluated using Bayer-Kirby method.
    Źródło:
    World Scientific News; 2015, 9; 144-160
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and spectral correlation studies of some (E)-N′-1-(substituted benzylidene) benzohydrazides
    Autorzy:
    Manikandan, V.
    Balaji, S.
    Senbagam, R.
    Vijayakumar, R.
    Rajarajan, M.
    Vanangamudi, G.
    Arulkumaran, R.
    Sundararajan, R.
    Thirunarayanan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1162032.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    (E)-N’-1-(substituted benzylidene) benzohydrazides
    IR and NMR spectra and Correlations
    UV
    Opis:
    About ten substituted (E)-N’-1-(substituted benzylidene) benzohydrazides have been synthesized. They are characterized by their analytical, ultraviolet, infrared and NMR spectral data. The effects of substituent on these data have been studied using Hammett equation.
    Źródło:
    World Scientific News; 2018, 111; 26-39
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis, spectral correlation analysis and evaluation of antimicrobial activities of some (E)-1-(2,4-dimethylthiazol-5-yl)-3-phenylprop-2-en-1-ones
    Autorzy:
    Sathiyendiran, V.
    Balaji, S.
    Senbagam, R.
    Vijayakumar, R.
    Manikandan, V.
    Rajarajan, M.
    Muthuvel, I.
    Markandan, R.
    Thirunarayanan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031849.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    4-dimethylthiazol enones
    Antimicrobial activities
    Crossed-Aldol condensation
    E-2
    IR and NMR spectra
    Spectral correlation analysis
    Substituent effects
    UV
    Opis:
    In this work, an attempt was made to synthesized (E)-1-(2,4-dimethylthiazol-5-yl)-3-phenylprop-2-en-1-one by cross-aldol condensation reaction of 5′-acetyl-2,4-dimethylthiazole with various substituted Benz aldehyde in the presence base (sodium hydroxide). The synthesized (E)-1-(2,4-dimethylthiazol-5-yl)-3-phenylprop-2-en-1-one derivative was characterized by physical constants, UV, FT-IR, 1H-NMR & 13C-NMR spectral data. All the observed spectral data of substituted (E)-1-(2,4-dimethylthiazol-5-yl)-3-phenylprop-2-en-1-one compounds have been correlated with Hammett substituent constants(σ, σ+, σI & σR) and F and R parameters using single and multi-linear regression analyses and studied for their anti-microbial activities and compared with the standard drugs (Ciprofloxacin). Some compound of the series exhibited promising anti-microbial activity compared to standard drugs (Ciprofloxacin).
    Źródło:
    World Scientific News; 2020, 141; 66-90
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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