A 15-year-old boy with huge facial swelling, recurrent severe epistaxis, progressive proptosis, nasal obstruction and impaired hearing on right side

This article has no abstract. The first 100 words appear below: A 15-year-old male hailing from Khagrachhari was admitted into the department with the complaints of swelling on the right side of face for 10 months with recurrent severe epistaxis, progressive proptosis, unilateral nasal obstruction and impairment of hearing for two months. On extraoral examination, there was a firm non-tender, nonmobile, fixed swelling on the right side of cheek causing facial asymmetry measuring about 10 × 12 cm in size extending from upper eyelid to middle of the right cheek supero-inferiorly and pre-auricular area to the medial wall of nose postero-anteriorl

A 15-year-old boy with huge facial swelling, recurrent severe epistaxis, progressive proptosis, nasal obstruction and impaired hearing on right side

This article has no abstract. The first 100 words appear below: A 15-year-old male hailing from Khagrachhari was admitted into the department with the complaints of swelling on the right side of face for 10 months with recurrent severe epistaxis, progressive proptosis, unilateral nasal obstruction and impairment of hearing for two months. On extraoral examination, there was a firm non-tender, nonmobile, fixed swelling on the right side of cheek causing facial asymmetry measuring about 10 × 12 cm in size extending from upper eyelid to middle of the right cheek supero-inferiorly and pre-auricular area to the medial wall of nose postero-anteriorl

Size-dependent permittivity and intrinsic optical anisotropy of nanometric gold thin films: A density functional theory study

Physical properties of materials are known to be different from the bulk at the nanometer scale. In this context, the dependence of optical properties of nanometric gold thin films with respect to film thickness is studied using density functional theory (DFT). We find that the in-plane plasma frequency of the gold thin film decreases with decreasing thickness and that the optical permittivity tensor is highly anisotropic as well as thickness dependent. Quantitative knowledge of planar metal film permittivity's thickness dependence can improve the accuracy and reliability of the designs of plasmonic devices and electromagnetic metamaterials. The strong anisotropy observed may become an alternative method of realizing indefinite media. © 2013 Optical Society of America

Use of In Vivo-Induced Antigen Technology (IVIAT) to Identify Genes Uniquely Expressed During Human Infection with Vibrio Cholerae

In vivo-induced antigen technology is a method to identify proteins expressed by pathogenic bacteria during human infection. Sera from 10 patients convalescing from cholera infection in Bangladesh were pooled, adsorbed against in vitro-grown El Tor Vibrio cholerae O1, and used to probe a genomic expression library in Escherichia coli constructed from El Tor V. cholerae O1 strain N16961. We identified 38 positive clones in the screen, encoding pili (PilA and TcpA), cell membrane proteins (PilQ, MshO, MshP, and CapK), methyl-accepting chemotaxis proteins, chemotaxis and motility proteins (CheA and CheR), a quorum-sensing protein (LuxP), and four hypothetical proteins. Analysis of immune responses to purified PilA and TcpA in individual patients demonstrated that the majority seroconverted to these proteins, confirming results with pooled sera. These results suggest that PilA and its outer membrane secretin, PilQ, are expressed during human infection and may be involved in colonization of the gastrointestinal tract. These results also demonstrate substantial immune responses to TcpA in patients infected with El Tor V. cholerae O1. In vivo-induced antigen technology provides a simple method for identifying microbial proteins expressed during human infection, but not during in vitro growth

Microcontroller based Constant Voltage Maximum Power Point Tracking for Solar inverter applications

Microcontroller based maximum power point tracking (MPPT) has been presented for single phase stand alone or grid connected solar inverter applications. The PV array consists of only 12V cell arrangement, thereafter, Discrete Comparator Circuit, The PIC microcontroller P16F676 controls the high power switching devices in the proposed MPPT scheme. The Constant Voltage (CV) algorithm continuously searches for the PV voltages in the rapidly changing weather conditions. The less pin and housing microcontroller does it all for the proposed Constant Voltage (CV) MPPT algorithm. The MPAB Simulation proves a very good agreement with the discrete comparator and switching devices for grid voltage, back-up battery charging and temporary load shedding operation. Therefore, until and unless MPPT voltages are in the operating region, the scheme allows grid voltage and back-up battery charging

Design and Development of a Single Channel Analyzer with Microcontroller Based Controlled Output

Single Channel Analyzer (SCA) is a most common device used in today\u27s nuclear world. Therefore, A SCA with microcontroller based controlled output has been proposed in this article. The system comprises of Lower Level Discriminator (LLD), Upper Level Discriminator (ULD), wide dynamic range, Fast Processing and Hysteresis. The Comparator LM339N used as the key component that performs the main function of the proposed nuclear module. The multi-turn potentiometers have been used as LLD and ULD for the incoming linear pulses from shaping amplifier. The system has also employ the Hysteresis facilities so that oscillations due to stray feedback are not possible. A lower pin and less housing PIC microcontroller (P16F676) has been used to control the width and time delay of the output pulses

Development of Photonic Crystal Fiber Based Gas/ Chemical Sensors

The development of highly-sensitive and miniaturized sensors that capable of real-time analytes detection is highly desirable. Nowadays, toxic or colorless gas detection, air pollution monitoring, harmful chemical, pressure, strain, humidity, and temperature sensors based on photonic crystal fiber (PCF) are increasing rapidly due to its compact structure, fast response and efficient light controlling capabilities. The propagating light through the PCF can be controlled by varying the structural parameters and core-cladding materials, as a result, evanescent field can be enhanced significantly which is the main component of the PCF based gas/chemical sensors. The aim of this chapter is to (1) describe the principle operation of PCF based gas/ chemical sensors, (2) discuss the important PCF properties for optical sensors, (3) extensively discuss the different types of microstructured optical fiber based gas/ chemical sensors, (4) study the effects of different core-cladding shapes, and fiber background materials on sensing performance, and (5) highlight the main challenges of PCF based gas/ chemical sensors and possible solutions

Antiproliferative potential of Sargassum binderi Sonder ex J. Agardh mediated biogenic silver/silver chloride nanoparticles on EAC, MCF-7 and HCT116 cells

Biosynthesis of Ag/AgCl-NPs from Sargassum binderi extract was confirmed by colour changes and a sharp peak at 416 nm detected by UV-visible spectrophotometer. It was characterized by Transmission Electron Microscopy (TEM), Energy Dispersive X-ray (EDX) spectrophotometer, X-ray powder Diffraction (XRD) and Fourier-Transform Infrared Spectroscopy (FTIR). Mild toxicity of the synthesized Ag/AgCl-NPs was determined by the brine shrimp nauplii cytotoxicity assay. IC50 values of 19.73, 25.56, and 14.0