Hybrid Plasmonic Waveguide Fed Broadband Nano-antenna for Nanophotonic Applications

In this paper, we propose a novel hybrid plasmonic waveguide fed broadband optical patch nano-antenna for nanophotonic applications. Through full wave electromagnetic simulation, we demonstrated our proposed antenna to radiate and receive signal at all optical communication windows (e.g. $\lambda$ = 850nm, 1310nm & 1550nm) with around 86% bandwidth within the operational domain. Moreover numerical results demonstrate that the proposed nano-antenna has directional radiation pattern with satisfactory gain over all three communication bands. Additionally, we evaluated the antenna performances with two different array arrangements (e.g. one dimensional and square array). The proposed broadband antenna can be used for prominent nanophotonic applications such as optical wireless communication in inter and intra-chip devices, optical sensing and optical energy harvesting etc.Comment: 4 Page, 7 figure

Transverse Wave Propagation in Relativistic Two-fluid Plasmas around Schwarzschild-anti-de Sitter Black Hole

The 3+1 formalism of Thorne and Macdonald has been used to derive the linear two-fluid equations for transverse waves in the plasma closed to the Schwarzschild-anti-de Sitter (SAdS) black hole. We reformulate the relativistic two-fluid equations to take account of gravitational effects due to the event horizon and negative cosmological constant and describe the set of simultaneous linear equations for the perturbations. Using a local approximation we investigate the one-dimensional radial propagation of Alfven and high frequency electromagnetic waves. We derive the dispersion relation for these waves and solve it for the wave number k numerically.Comment: 11 pages. arXiv admin note: substantial text overlap with arXiv:1008.4838, arXiv:0807.4595, arXiv:0902.3766, arXiv:0806.2740, arXiv:0904.337

Efficiency of subwavelength imaging with multisegment nanolens

We analyzed capabilities and functionalities of a multisegment superlens recently suggested for long-distance transport of color images with subwavelength resolution. We studied the performance of three- and six-segment nanolens structures by analyzing numerically both transmission and reflection coefficients and by employing the full-wave simulations for a particular source arrangement. Our results suggest that such multisegment structures offer limited subwavelength imaging performance with a relatively narrow frequency band

Physical map location of the peptide methionine sulfoxide reductase gene on the Escherichia coli chromosome

This is the publisher's version, also available electronically from "http://jb.asm.org".No abstract available

In vitro control of plant pathogenic Xanthomonas spp. using Poncirus trifoliata Rafin

The secondary metabolites such as essential oil and pure compounds (limonin and imperatorin) from Poncirus trifoliata Rafin were tested for in vitro control of phytopathogenic bacteria of Xanthomonas spp. In vitro studies showed that the oil had inhibitory effect on Xanthomonas campestris pv. compestris KC94-17-XCC, Xanthomonas campestris pv. vesicatoria YK93-4-XCV, Xanthomonas oryzae pv. oryzae KX019-XCO and Xanthomonas sp. SK12 with their inhibition zones and minimum inhibitory concentration (MIC) values ranging from 13.1~22.1 mm and 62.5~125 μg/ml, respectively. Limonin and imperatorin also had in vitro antibacterial potential (MIC: 15.62~62.5 μg/ml) against all the tested Xanthomonas spp. Furthermore, the SEM studies demonstrated that limonin and imperatorin caused morphological changes of Xanthomonas sp. SK12 at the minimum inhibitory concentration (15.62 μg/ml). These results of this study support the possible use of essential oil and natural compounds from P. Trifoliata in agriculture and agro-industries to control plant pathogenic microorganisms

A NEW PRENYLATED FLAVANONE FROM THE ARIAL PART OF <i>Orthosiphon stamineus</i>

Phytochemical investigations on the chloroform extract of the arial part of Orthosiphon stamineus resulted in isolation of one new prenylated compound 5,7-dimethoxy-3,4′-dihydroxy-3′,8-di-C-prenylflavanone together with four known flavonoids compounds, sinensetin, eupatorin, 5,6,7,4¢-tetramethoxyflavone and 3-hydroxy-5,6,7,4¢-tetramethoxyflavone. The structures were deduced on basis of different analytical methods such as UV, IR, 1H-NMR, 13C-NMR, DEPT, COSY, HMBQ and GC-MS. The prenylated compound is reported for the first time from this plant.   Keywords: Orthosiphon stamineus, prenylated flavanone, flavonoid