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36 articles for “AZO”
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Research ArticleOpen accessEvery word in the titleNematic and Smectic Mesophase from Calamitic Bisazobenzene Liquid Crystal: Synthesis and Characterization of 1- Methoxyhexyloxy-4'-(4-Phenylazo) Azobenzene Hybrid MoleculeSidik Silong, Abdulsalam Abubakar Salisu, Muhamad Zaki Ab Rahman et al.A new hybrid calamitic liquid crystal material with rod-shape bisazobenzene moieties as a core has been synthesized and characterized by spectroscopic methods. The mesomorphic properties were investigated by differential scanning colorimetry, polarizing optical microscopy and X-Ray diffraction. The rod-shaped molecule 1- methoxyhexyloxy-4`-(4-phenylazo)azobenzene was prepared by diazotization of 4-phenylazoaniline, coupling with phenol and subsequent etherification of 1-Bromohexyloxy-4`-(4-phenylazo)azobenzene in methanol. The presence … …American Journal of Applied Sciences, Vol. 6, Issue 4 · 30 Apr 2009 · 7,980 accessesView PDFCite
Research ArticleOpen accessIn the keywordsCyclic Volta Metric Study of Alizarin Yellow R and Some Analogous Arylazo Compounds in DMF and in Aqueous MediaHossnia MohranThe Cyclic Voltammetry (CV) was used to investigate the electrochemical behavior of alizarin yellow R and some analogous arylazo compounds having almost the same central azo group. For this purpose, the substances chosen for the measurements are Alizarin Yellow R (AYR), Eriochrome Black T (EBT) and Sudan II (SUD II). The investigations were carried out at room temperature (298 K) … …American Journal of Applied Sciences, Vol. 2, Issue 12 · 31 Dec 2005 · 7,235 accessesView PDFCite
Research ArticleOpen accessIn the keywordsBirds as a Tool for Island Habitat Conservation and ManagementPedro Rodrigues, Regina Tristao da CunhaProblem statement: The Azores is a archipelago of nine volcanic islands, situated in the middle of the North Atlantic Ocean. Oceanic islands are known hotspots of biodiversity and the Azores, although relatively young (0.3-13 MA), conform to this general pattern. The local avifauna amount to 37 birding species, with two endemic species and 11 endemic subspecies. With an estimated population … …American Journal of Environmental Sciences, Vol. 8, Issue 1 · 20 Jan 2012 · 8,157 accessesView PDFCite
Research ArticleOpen accessIn the keywordsOptical and Structure Analysis of ZnO:Al FilmNeilo Marcos Trindade, Michel Chaves, José Roberto Ribeiro Bortoleto et al.ZnO and ZnO:Al are wide-bandgap semiconductors which have many applications, mainly as transparent conducting films. Thin films of these compounds were deposited onto glass and silicon substrates by RF magnetron sputtering for the investigation of structural and optical characteristics. The XRD results show that the films present wurtzite structure. The formation of a polycrystalline film having a preferential crystallographic orientation … …American Journal of Engineering and Applied Sciences, Vol. 10, Issue 4 · 5 Oct 2017 · 7,855 accessesView PDFCite
Research ArticleOpen accessIn the keywordsStudy on Optical Constants and Refractive Index Dispersion of Neutral red Doped Polymer FilmHussain A. BadranProblem statement: The some optical constants polymer thin film with red dye 3-amino-7-dimethylamino-2-methyl phenazine (NR) as the guest material and Polyvinylpyrrolidone (PVP) as the host material were prepared by adulteration and spin-coating methods. Approach: The values of some important parameters (refractive index n, extinction coefficient K and dielectric constant ε∞) of polymer thin film are determined from these spectra. Results: … …American Journal of Applied Sciences, Vol. 9, Issue 2 · 26 Dec 2011 · 8,919 accessesView PDFCite
Research ArticleOpen accessIn the keywordsNew Schiff Bases with Pyridine Core: Spectral, Thermal and Optical CharacterizationsSie-Tiong Ha, Lay-Khoon Ong, Yip-Foo Win et al.Problem statement: Numerous studies have been conducted on the Schiff base's alkyl and alkyloxy possessing aromatic core. However, the thermo tropic properties of Schiff base's ester (or alkanoyloxy) with pyridine core was rare studied. Approach: To study spectral, thermal and optical behaviors of Schiff base ester possessing heterocyclic (pyridine) terminal core. A series of 4-[(pyridin-3-ylmethylene) amino] phenylalkanoates were prepared and … …American Journal of Applied Sciences, Vol. 7, Issue 5 · 31 May 2010 · 7,464 accessesView PDFCite
Research ArticleOpen accessIn the keywordsNew Mesogenic Schiff Base Esters with Polar Chloro Substituent: Synthesis, Thermotropic Properties and X-Ray Diffraction StudiesSie-Tiong Ha, Lay-Khoon Ong, Yasodha Sivasothy et al.Problem statement: Many studies have been conducted on the Schiff base’s alkyl and alkyloxy possessing terminal halogen substituent. However, the thermotropic properties of Schiff base’s ester (or alkanoyloxy) with chloro terminal group remained unstudied. Approach: Synthesis a series of new Schiff base ester possessing polar chloro group and investigate its mesomorphic properties. The title compounds were prepared via condensation and … …American Journal of Applied Sciences, Vol. 7, Issue 2 · 28 Feb 2010 · 12,956 accessesView PDFCite
Research ArticleOpen accessIn the author namesDistribution of Total Mercury in the Sedimentary Environment in Lake Ahémé, Southern Benin (West Africa)Julien Gnonlonfoun Adounkpe, N. B. Nadia Azon, Hermione W. Degila, Peace HounkpeThis study focuses on the spatio-temporal assessment of mercury pollution of the sedimentary environment of Lake Ahémé in southwestern Benin Republic. Sediment samples were taken from 32 sites in July 2018 and then in December 2019, covering the two major climatic seasons of the southern area of the country. Sampling was done according to a grid design of the entire … …American Journal of Environmental Sciences, Vol. 17, Issue 5 · 26 Dec 2021 · 6,897 accessesView PDFCite
Research ArticleOpen accessIn the author namesSimulated Annealing Decoder for Linear Block CodesLahcen Niharmine, Hicham Bouzkraoui, Ahmed Azouaoui, Youssef HadiIn this study, we introduce a novel soft decoder, the first of its kind, for linear block codes, based on Simulated Annealing algorithm (SA). The main enhancement in our contribution which let our decoder over performs with large gain (about 3 dB at 710-4) the classical SA approach, is to take the most reliable information set of the received codeword … …Journal of Computer Science, Vol. 14, Issue 8 · 4 Sep 2018 · 7,810 accessesView PDFCite
Research ArticleOpen accessIn the author namesIslamic Finance Development and Economic Growth Nexus: The Case of the United Arab Emirates (UAE)Abdelghani Echchabi, Dhekra AzouziIslamic Banking presently knows a great success and new Islamic banks are opening every day all over the world. This Shari’ah (It is the bod of Islamic law, it literally means “way” or “path”) compliant banking is expected to withstand the financial crises and to enhance economic growth. In this paper, the purpose is to analyse the relationship between Islamic … …American Journal of Economics and Business Administration, Vol. 7, Issue 3 · 11 Aug 2015 · 7,304 accessesView PDFCite