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Wyszukujesz frazę "Kalyanasundaram, N." wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Spectral correlation analysis of Hammett substituent constants and biological activities of some (E)-1-(4-phenoxyphenyl)-3-phenylprop-2-en-1-ones
Autorzy:
Kalyanasundaram, N.
Sakthinathan, S. P.
Suresh, R.
Kamalakkannan, D.
Joseph, S. J.
Vanangamudi, G.
Thirunarayanan, G.
Powiązania:
https://bibliotekanauki.pl/articles/412539.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
substituted styryl 4-phenoxyphenylketones
UV-spectra
IR spectra
NMR spectra
Hammett constants
substituent effects
regression analysis and antimicrobial activities
Opis:
A series of aryl chalcones have been synthesized from 4-phenoxyacetophonone with various substituted benzaldehydes. The purity of all chalcones has been checked using their physical constants and spectral data. These 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. The single parameter correlation with few Hammett constants and F and R parameters gave satisfactory correlation coefficients whereas all multiple correlations gave satisfactory correlation coefficients with Resonance, Field and Swain-Lupton’s parameters. The antimicrobial activities of all chalcones have been studied using Bauer-Kirby method.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 9; 23-47
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
Tytuł:
Effect of preservation methods on tensile properties of human femur-ACL-tibial complex (FATC) – a cadaveric study on male subjects
Autorzy:
Marieswaran, M.
Mansoori, N.
Digge, V. K.
Jhahjhria, S. K.
Behera, C.
Lalwani, S.
Kalyanasundaram, D.
Powiązania:
https://bibliotekanauki.pl/articles/306817.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
przechowywanie w formalinie
mrożenie głębokie
FATC
więzadło krzyżowe przednie
rozciąganie
tissue preservation
storage in formalin
deep freezing
anterior cruciate ligament
biomechanical study
tensile testing
Opis:
Deep freezing and storing in formalin are some of the common techniques of human tissue preservation. However, the preservation modes affect the biomechanical properties of the tissues. In this work, the effects of the above-stated preservation techniques are compared with that of fresh cadaveric samples. Methods: FATC samples from male cadavers of age between 60 and 70 years were tested under tensile loading at a strain rate of 0.8 s–1. Fourteen FATC samples from soft embalmed cadavers were preserved for 3 weeks by two methods: (a) 10% formalin and (b) deep freezing at –20 C followed by thawing. Seven FATC samples from fresh cadavers were experimented as control samples. The results were evaluated by a two-stage statistical process of Kruskal–Wallis H test and Mann–Whitney U-test. Results: It was observed that the failure force of fresh cadavers was the highest while that of preserved samples were approximately half the value. Failure elongation of frozen samples exceeded fresh samples while formalin samples failed at lesser elongations. Higher incidence of tibial insertion point or mid-section failures were observed in fresh samples while the higher incidence of ruptures at femoral insertion point was observed in the two preservation methods. Conclusion: Tensile properties of fresh tissues vary significantly from that of formalin preserved or frozen preserved samples.
Źródło:
Acta of Bioengineering and Biomechanics; 2018, 20, 3; 31-42
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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