Comparison of simple and chelated amberlite IR-120 for preconcentration and Determination of Cu(II) from aqueous samples

In the present study, the efficiency of simple and chelating Amberlite IR-120 with α-nitroso β-naphthol (IR-αNβN) and with 8-hydroxy quinoline (IR-8HQ) has been compared for the removal of Cu(II) from aqueous solutions. The chelation was confirmed using different characterization techniques like SEM, TGA and FTIR. A number of experiments were carried out in batch system to determine the effect of different parameters on adsorption of Cu(II) like pH, contact time and sample volume. The results showed occurrence of maximum adsorption at pH 7 in 10 min with adsorption capacity of 71.5 mg g-1 at 298 K. The adsorption followed pseudo second order kinetic model among the four kinetic models applied. Maximum desorption from IR-8HQ was obtained with a mixture of 4.0 M HCl and 0.5 M HNO3. Furthermore, IR-8HQ was found to be most selective adsorbent among three adsorbents investigated. The developed preconcentration procedure was successfully applied to spiked tap water and real samples. KEY WORDS: Chelating adsorbent, Amberlite IR-120, α-Nitroso β-naphthol, 8-Hydrox quinoline, Preconcentration Bull. Chem. Soc. Ethiop. 2016, 30(1), 39-54.DOI: http://dx.doi.org/10.4314/bcse.v30i1.

Dynamical stabilization of classical multi electron targets against autoionization

We demonstrate that a recently published quasiclassical M\oller type approach [Geyer and Rost 2002, J. Phys. B 35 1479] can be used to overcome the problem of autoionization, which arises in classical trajectory calculations for many electron targets. In this method the target is stabilized dynamically by a backward--forward propagation scheme. We illustrate this refocusing and present total cross sections for single and double ionization of helium by electron impact.Comment: LaTeX, 6 pages, 2 figures; submitted to J. Phys.

Role of bronchoalveolar lavage, transbronchial needle aspiration with bronchial biopsy correlation in lung tumours and immunohistochemistry wherever required

Background: Lung cancer is most frequently diagnosed major cancer in the world and the most common cause of cancer mortality worldwide. It comprises about 17% of the total new cancer cases in males and 23% of the total cancer deaths. The objectives of this study were to compare bronchial biopsy, BAL and TBNA in diagnosing lung malignancies and IHC wherever required.Methods: The study was conducted at Sher-i-Kashmir Institute of Medical Sciences Srinagar, India in the department of Pathology. It was a prospective study over a period of 1½ years from June 2015 to December 2016. All patients clinically/ radiologically suspected of lung malignancies who presented between June 2015 to December 2016 and underwent bronchial biopsy, BAL (washings) and TBNA were included in the study. The study included only those cases where BAL, TBNA and bronchial biopsy were done simultaneously.Results: Out of a total 117 clinically suspected cases of lung cancer, tumor was found in 103 cases (103/117) by biopsy, 51 cases by BAL (51/117) and 64 cases by TBNA (64/117). The total number of false positive cases and false negative cases by BAL were 6 and 58. Sensitivity of BAL was found to be 43.69% and specificity 57.14%. The total number of false positive cases and false negative cases by TBNA were 7 and 46. Sensitivity and specificity of TBNA was found to be 55.34% and 50.0%.Conclusions: Thus, in the present study yield of diagnosis was highest with the bronchoscopic biopsies and in maximum number of cases with a sensitivity of 88.034%, and specific histologic diagnosis was made by biopsies and IHC only. Though BAL and TBNA were inferior to bronchial biopsy in diagnosing lung malignancies but these were effective for peripheral lung malignancies and when the patient was at risk of haemorrhage

SUFFICIENT CONDITIONS FOR NONUNIFORM WAVELET FRAMES ON LOCAL FIELDS

The main objective of this paper is to establish a set of sufficient conditions for nonuniform wavelet frames on local fields of positive characteristic. The conditions proposed are stated in terms of the Fourier transforms of the wavelet system’s generating functions

Growth Parameters for Films of Hydrothermally Synthesized One-Dimensional Nanocrystals of Zinc Oxide

Zinc oxide has been the focus of material research due to its potential applications in a variety of novel fields. The material exhibits anisotropic growth in the form of single crystal rods/wires of length in microns and thickness in several tens of nanometers through a facile and low temperature hydrothermal route wherein size, morphology, orientation, and growth rate are strongly dependent on a number of synthesis parameters. In this review article we intend to present/discuss the effects of important growth parameters of zinc oxide that have been reported in the literature. These parameters include concentration of the precursor solution, growth time, role of hexamine, synthesis temperature, pH of the precursor, and seeding layer deposited on a substrate

Metastatic Squamous Cell Carcinoma to the Cervical Lymph Nodes From an Unknown Primary Cancer : Management in the HPV Era

Background Patients with metastases in the lymph nodes of the neck and no obvious primary tumor, neck cancer with unknown primary (NCUP), represent a management challenge. A majority of patients have metastatic squamous cell carcinoma (SCC), although other histologies do occur. Methods We comprehensively reviewed the literature, compared available guidelines, and conferred with an international team of experts. Results Positron emission tomography-computed tomography (PET-CT) and fine needle aspiration (FNA) under ultrasound guidance increase accuracy of diagnosis. Immunohistochemistry (IHC), determination of human papilloma virus (HPV) status, by p16 staining or by in situ hybridization (ISH), and next-generation gene sequencing can guide us regarding probable primary sites and tumor biology. Narrow Band Imaging (NBI) has been introduced for the early detection of subtle mucosal lesions. Direct laryngoscopy (DL) and tonsillectomy have long been procedures used in the search for a primary site. More recently, TransOral Robotic Surgery (TORS) or Transoral LASER Microsurgery (TLM) have been introduced for lingual tonsillectomy. Conclusions New technologies have been developed which can better detect, diagnose, and treat occult primary tumors. Decisions regarding therapy are based on the primary tumor site (if discovered) and N stage. Options include neck dissection with or without postoperative adjuvant therapy, primary irradiation, or combined chemotherapy with irradiation. The preferred treatment of patients whose primary remains unidentified is controversial.Peer reviewe

Metasurface-Based Wideband MIMO Antenna for 5G Millimeter-Wave Systems

This paper presents a metasurface based multiple-input multiple-output (MIMO) antenna with a wideband operation for millimeter-wave 5G communication systems. The antenna system consists of four elements placed with a 90 degree shift in order to achieve a compact MIMO system while a 2 x 2 non-uniform metasurface (total four elements) is placed at the back of the MIMO configuration to improve the radiation characteristics of it. The overall size of the MIMO antenna is 24 x 24 mm(2) while the operational bandwidth of the proposed antenna system ranges from 23.5-29.4 GHz. The peak gain achieved by the proposed MIMO antenna is almost 7dB which is further improved up to 10.44 dB by employing a 2 x 2 metasurface. The total efficiency is also observed more than 80% across the operating band. Apart from this, the MIMO performance metrics such as envelope correlation coefficient (ECC), diversity gain (DG), and channel capacity loss (CCL) are analyzed which demonstrate good characteristics. All the simulations of the proposed design are carried out in computer simulation technology (CST) software, and measured results reveal good agreement with the simulated one which make it a potential contender for the upcoming 5G communication systems

CMRegNet-An interspecies reference database for corynebacterial and mycobacterial regulatory networks

BACKGROUND: Organisms utilize a multitude of mechanisms for responding to changing environmental conditions, maintaining their functional homeostasis and to overcome stress situations. One of the most important mechanisms is transcriptional gene regulation. In-depth study of the transcriptional gene regulatory network can lead to various practical applications, creating a greater understanding of how organisms control their cellular behavior. DESCRIPTION: In this work, we present a new database, CMRegNet for the gene regulatory networks of Corynebacterium glutamicum ATCC 13032 and Mycobacterium tuberculosis H37Rv. We furthermore transferred the known networks of these model organisms to 18 other non-model but phylogenetically close species (target organisms) of the CMNR group. In comparison to other network transfers, for the first time we utilized two model organisms resulting into a more diverse and complete network of the target organisms. CONCLUSION: CMRegNet provides easy access to a total of 3,103 known regulations in C. glutamicum ATCC 13032 and M. tuberculosis H37Rv and to 38,940 evolutionary conserved interactions for 18 non-model species of the CMNR group. This makes CMRegNet to date the most comprehensive database of regulatory interactions of CMNR bacteria. The content of CMRegNet is publicly available online via a web interface found at http://lgcm.icb.ufmg.br/cmregnet