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Microwave synthesis, spectroscopic characterization and DFT investigation of 4-(4-(2-(4-substitutedphenyl)-4-oxothiazolidin-3-yl)benzyl)oxazolidin-2-one derivatives

100%
Rosy P. J., Kalyanasundaram S., Santhanalakshmi K., Muthukumar S.
World Scientific News
|
2017
|
tom 69
2

Biochemical and electrophoretic analyses of saliva from the predatory reduviid species Rhynocoris marginatus (Fab.)

100%
Kitherian S., Muthukumar S., Rivers D.
Acta Biochimica Polonica
|
2013
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tom 60
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nr 1
The saliva of Rhynocoris marginatus consists of amylase, invertase, trehalase, protease, acid phosphatase, alkaline phosphatase, phospholipase, lipase, trypsin, hyaluronidase, and esterase. All enzyme activities were significantly higher in the saliva of female R. marginatus when compared to the saliva of male individuals. The saliva was analyzed by tricine SDS/PAGE, sephadex column chromatography, FT-IR, and MALDI-TOF. The pH of the saliva was slightly alkali. The SDS/PAGE revealed a few proteins with molecular masses greater than 29.5 and 36.2 kDa for male and female predator saliva respectively. The FT-IR spectrum confirmed the acidic, proteinaceous, enzymatic, and aromatic nature of the saliva. The MALDI-TOF-MS revealed the presence of enzymes, proteins, peptides, and other biomolecules. The most prominent peptides were named as RmIT-1 (3.79kDa), RmIT-2 (9.7kDa), and RmIT-3 (10.94kDa) (Rhynocoris marginatus Insect Toxin). Further studies are underway to isolate and identify these biomolecules.
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Synthesis, characterization and evaluation of mosquito larvicidal effect of 1,3,4-oxadiazole derivatives against Culex quinquefasciatus

100%
Santhanalakshmi K., Kalyanasundharam S., Muthukumar S., Rosy P. J.
World News of Natural Sciences
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2018
|
tom 19
A new series of 1,3,4-oxadiazole derivatives were prepared from the condensation of acid hydrazide,5-bromo-2-(trifluoromethoxy)benzoic acid in POCl3 by ultrasonic irradiation method. The new synthetic method furnished the desired products in shorter time and good yields. The chemical structures of compounds 4a-h were confirmed by Fourier transform infrared spectroscopy (IR), proton nuclear magnetic resonance (1H-NMR), carbon nuclear magnetic resonance (13C-NMR) and elemental analyses. Larvicidal bioassay tests were performed using several 2-(5-bromo-2-(trifluoromethoxy) phenyl)-5-aryl-1,3,4-oxadiazole. These synthesized compounds presented strong larvicidal activity against urban mosquitoes Culex quinquefasciatus. The results suggest that larvicidal activity might be correlated with the presence of electron-withdrawing substituents in the para position of the phenyl ring. The alterations observed in the larvae spiracular valves of the siphon and anal papillae by 1,3,4- oxadiazoles in the larvicidal bioassay are responsible for larvae’s death.
4

Proteomic analysis of human saliva: An approach to find the marker protein for ovulation

64%
Saibaba G., Rajesh D., Muthukumar S., Sathiyanarayanan G., Padmanabhan P., Akbarsha M. A., Gulyas B., Archunan G.
Reproductive Biology
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2016
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tom 16
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nr 4
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