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Venkatesan P.,Madurai Kamaraj University | Venkatesan P.,Mahendra Institute of Technology | Sumathi S.,Madurai Kamaraj University
Journal of Heterocyclic Chemistry | Year: 2010

(Chemical Equation Presented) The chalcones 1-(2′-hydroxy-aryl)-3-(1- indol-3-yl)-prop-2-en-1-one (3) and 1-(2′-hydroxy-aryl)-3-(2- chloroquinolin-3-yl)-prop-2-en-1-one (6) were synthesised by piperidine mediated condensation of an ethanolic solution of an o-hydroxyacetophenone (1) with corresponding heteroaryl-3-carboxaldehyde. The structures have been established on the basis of elemental (C, H, N) analysis, UV, IR, 1H NMR spectral data. The compounds 3 and 6 were screened for antimicrobial activities against a variety of bacterial agents. © 2009 HeteroCorporation. Source


Ramkumar R.P.,Mahendra Institute of Technology | Arumugam S.,Nandha Engineering College
International Journal of Engineering and Technology | Year: 2013

Earlier state-of-art algorithms of iris recognition system works well for ideal-data, because of the perfect iris localization algorithms. The same ideal-algorithm suffers a lot under non-ideal data. Nonideal- data refers to eye image captured under unconstrained environments, such as non-uniform illumination, image captured at a distance, eye image with reflections, blurred image, off-axis eye images, majority of occlusions due to eyelashes and eyelids. So there arises a need for perfect iris localization and segmentation algorithm. This proposed method segments the iris region almost perfectly even in the nonideal data. Further, the fixed and consistent iris strip is obtained without the need for normalization phase. Moreover, this proposed method is tested on publicly available CUHK iris database. Experimental result shows that, this proposed iris segmentation algorithm results in better accuracy when compared to the earlier state-of-art-algorithms with reduced computational complexity. Source


Venkatesan P.,Mahendra Institute of Technology | Maruthavanan T.,Salem College
Bulletin of the Chemical Society of Ethiopia | Year: 2011

The biological activity of flavone has been enhanced by introducing heteroaryl moiety in C-2 position of chromone derivatives. Thus, 2-(1H-Indol-3-yl)-4H-chromen-4-one derivatives (6a-e) and 2-(2-chloroquinolin-3- yl)-4H-chromen-4-one derivatives (7a-e) were synthesized from corresponding chalcone. They were structurally confirmed by analytical and spectral data and evaluated for their antimicrobial activities. The results showed that this skeletal framework exhibited marked potency as antimicrobial agents. © 2011 Chemical Society of Ethiopia. Source


Raja G.,Paavai Engineering College | Venkatesan P.,Mahendra Institute of Technology
E-Journal of Chemistry | Year: 2010

Various samples of groundwater were collected from different areas in and around the Punnam village of Karur District, India and analyzed for their physicochemical characteristics. The results of this analysis were compared with the water quality standards of WHO and CPHEEO. In this analysis the various physicochemical parameters such as pH, electrical conductivity, turbidity, total dissolved solids, Cl-, F-, SO4 2-, NO3 -, Na+, K+, Fe, Cr, calcium and magnesium etc., were determined using standard procedures. The quality of groundwater samples were discussed with respect to these parameters and thus an attempt were made to ascertain the quality of groundwater used for drinking and cooking purposes in the sampling areas. Source


Venkatesan P.,Mahendra Institute of Technology | Maruthavanan T.,Salem College
Asian Journal of Chemistry | Year: 2011

Substituting heteroaryl group in C-2 position of chromone improves the biological activity of flavones. Thus, 2-(1H-indol-3-yl)-4Hchromen- 4-one derivatives (6a-e) and 2-(2-chloroquinolin-3-yl)-4H-chromen-4-one derivatives (7a-e) were synthesized from corresponding chalcone. They were structurally confirmed by analytical and spectral data and evaluated for their antimicrobial activities. The resultsshowed that this skeletal framework exhibited marked potency as antimicrobial agents. The most active antibacterial agent was 2-(1Hindol- 3-yl)-5,7-dimethoxy-4H-chromen-4-one (6e) while 2-(2-chloroquinolin- 3-yl)-6-methoxy-4H-chromen-4-one (7b) appeared to be the most active antifungal agent. Source

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