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Arunachalam VINEETHA,Kadarkarai MURUGAN 한국곤충학회 2009 Entomological Research Vol.39 No.1
Investigations were made to evaluate the larvicidal activity and smoke repellent potential of Toddalia asiatica (L.) and Aegle marmelos at different concentrations (20, 40, 60, 80 and 100 p.p.m.) against first to fourth instar larvae and pupae of Aedes aegypti(L.). The LC50 of A. marmelos and T. asiatica against first instars was 50.960 and 47.893 p.p.m., respectively; against second instars, 52.979 and 50.922; third instars, 56.653 and 54.461; and fourth instars, 60.778 and 61.278. The LC50 and LC90 for A. marmelos and T. asiatica against pupae were 56.634 and 112.992, and 53.64 and 116.22 p.p.m., respectively. The smoke toxicity of T. asiatica against Ae. aegypti was greater than that of A. marmelos. Smoke-exposed gravid females oviposited fewer eggs when compared to those that were not exposed to smoke. Smoke-exposed females hatched a lower percentage of eggs compared to unexposed females.
Rajan Murugan,Karuppusamy Arunachalam,Thangaraj Parimelazhagan 한국식품과학회 2012 Food Science and Biotechnology Vol.21 No.1
In the present investigation, phenolics (36.6 g gallic acid equivalents (GAE)/100 g extract), tannin (21.6 g GAE/100 g extract), and flavonoid content (67.5 g rutin equivalents/100 g extract) were found to be highest in acetone extract. Ficus (Ficus amplissima) acetone extract showed maximum antioxidant activity in phosphomolybdenum (958.8 mg ascorbic acid equivalents/g extract), DPPH (1.6μg/mL), ferric reducing antioxidant power (2,993 mmol Fe (II)/g extract), and metal chelating (39.7 mg EDTA equivalents/g extract) assays. In anti-inflammatory study,400 mg/kg acetone extract showed maximum reduction in the paw volume compare to indomethacin. GC-MS analysis indicated that bark contain rich source of non-polar compounds like Lup-20(29)-en-3-yl acetate (33.04%). Hence, Ficus can be valuable source for antioxidant and anti-inflammatory and seemed to be applicable in medicine.
Design of a Polarization Splitter Based on a Dual-core Hexagonal-shaped Photonic Crystal Fiber
Subramani Jegadeesan,Muneeswaran Dhamodaran,Maria Azees,Arunachalam Murugan 한국광학회 2019 Current Optics and Photonics Vol.3 No.4
In this paper, a microstructured, hexagonal-shaped dual-core photonic crystal fiber (PCF) is proposed. The proposed structure has specific optical properties to obtain high birefringence and short coupling length, for different values of structural parameters varied over a wide range of wavelength. The properties are analyzed using a solid core of silica material. The proposed structure is implemented as a polarization splitter with splitting length of 1.9 mm and a splitting ratio of -34.988 dB, at a wavelength of 1550 nm. The obtained bandwidth in one band gap of about 81 nm. The numerical analysis ensures that the performance of the proposed polarization splitter is better than that of existing ones.