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


Wyświetlanie 1-4 z 4
Tytuł:
Synthesis, effect of substituents and antimicrobial activities of some 4-bromophenyl chalcones
Autorzy:
Vijayakumar, S.
Vanangamudi, G.
Thirunarayanan, G.
Powiązania:
https://bibliotekanauki.pl/articles/1191238.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
(E)-1-(4-bromophenyl)-3-(substituted phenyl)-2-propen-1-ones
UV spectra
IR spectra
NMR spectra
Substituent effects
Antimicrobial activities
Opis:
Elven (E)-1-(4-bromophenyl)-3-(substituted phenyl)-2-propen-1-ones are formed using sodium hydroxide catalyzed Aldol condensation between 4-bromoacetophenone and substituted benzaldehyde. The production of these chalcone compounds are above 90%. These α, β unsaturated ketones were specified by their physical constants and spectral data (UV, IR, 1H and 13C-NMR). Hammett substituted constants (σ, σ+, σI & σR and F and R parameters have been used for correlating the spectral values of these α, β unsaturated ketones by using single and multi-linear regression analysis. The impacts of substituents on the spectral data have been known on statistical analysis. By using Bauer-Kirby method the anti-microbial activities of these (E)-1-(4-bromophenyl)-3-(substituted phenyl)-2-propen-1-ones compounds are estimated.
Źródło:
World Scientific News; 2016, 54; 132-152
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spectral correlations and antimicrobial activities of some 1-pyrenyl chalcones
Autorzy:
Arulkumaran, R.
Vijayakumar, S.
Sundararajan, R.
Sakthinathan, S.P.
Kamalakkannan, D.
Suresh, R.
Ranganathan, K.
Rajakumar, P.R.
Powiązania:
https://bibliotekanauki.pl/articles/411776.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
substituted styryl 1-pyrenyl ketones
UV spectra
IR spectra
NMR spectra
substituent effects
antimicrobial activities
Opis:
A series of 1-pyrenyl chalcones have been synthesized by Crossed-Aldol condensation of 1-acetylpyrene and substituted benzaldehydes. The purities of these chalcones have been checked by their physical constants, UV, IR, NMR and MASS spectral data. The spectral data of these chalcones have been correlated with Hammett sigma constants, F and R parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effect of substituents on the spectral group frequencies have been discussed. The anti-microbial activities of these chalcones have been evaluated using Bauer-Kirby method.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 5; 21-38
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of substituent effects and antimicrobial activities of some 2ʹ,5ʹ-dimethyl phenyl chalcones
Autorzy:
Joseph, S. J.
Kamalakkannan, D.
Arulkumaran, R.
Sakthinathan, S. P.
Suresh, R.
Sundararajan, R.
Vijayakumar, S.
Ranganathan, K.
Vanangamudi, G.
Thirunarayanan, G.
Powiązania:
https://bibliotekanauki.pl/articles/412597.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
substituted styryl 2
5ʹ-dimethyl phenyl chalcones
UV spectra
IR spectra
NMR spectra
substituent effects
antimicrobial activities
Opis:
Some 2ʹ,5ʹ-dimethyl phenyl chalcones have been synthesized by Crossed-Aldol condensation between 2,5-dimethyl acetophenone and various substituted benzaldehydes using catalytic amount of sodium hydroxide and ethanol. The yields of the chalcones are more than 93 %. The purities of these chalcones have been checked by their physical constants, UV, IR, NMR and MASS spectral data. The spectral data of these chalcones have been correlated with Hammett sigma constants, F and R parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effects of substituents on the spectral group frequencies have been discussed. The anti-microbial activities of these chalcones have been evaluated using Bauer-Kirby method.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 5; 99-123
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spectral correlation analysis and antimicrobial activities of some 2,4-dimethoxy phenyl chalcones
Autorzy:
Joseph, S. J.
Arulkumaran, R.
Kamalakkannan, D.
Sakthinathan, S. P.
Sundararajan, R.
Suresh, R.
Vijayakumar, S.
Ranganathan, K.
Kalyanasundaram, N.
Vanangamudi, G.
Thirunarayanan, G.
Powiązania:
https://bibliotekanauki.pl/articles/412661.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
substituted styryl 2
4-dimethoxy phenyl ketones
UV spectra
IR spectra
NMR spectra
substituent effects
antimicrobial activities
Opis:
A series of 2,4-dimethoxy phenyl chalcones have been synthesized by Crossed-Aldol condensation of 2,4-dimethoxy phenyl and various substituted benzaldehydes. The purities of these chalcones have been checked by their physical constants, UV, IR, NMR and MASS spectral data. The spectral data of these chalcones have been correlated with Hammett sigma constants, F and R parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effects of substituents on the spectral group frequencies have been discussed. The anti-microbial activities of these chalcones have been evaluated using Bauer-Kirby method.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 4; 48-65
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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