197,435 research outputs found
Choosing Both Faith and Fun: Youth Negotiations of Moral Norms in South Beirut
No full textChallenging both polarized depictions of Muslim youth and scholarship that over-privileges piety as a focal point in Muslims' lives, this article highlights the complexity of the moral worlds of Shi'i youth in Lebanon. Through ethnography of youth choices when going out, we argue that youth practices and discourses of morality are multiple and flexible in their deployments, perhaps especially when it comes to ideas about leisure. This interpretive flexibility may work to redefine ideas about leisure within a framework of religiosity such that some of the rules of piety itself are perceived as flexible. © 2013 Copyright Routledge Journals, Taylor and Francis.Adely F, 2009, INT J MIDDLE E STUD, V41, P372, DOI 10.1017-S0020743809091107; Agrama HA, 2010, AM ETHNOL, V37, P2, DOI 10.1111-j.1548-1425.2009.01238.x; [Anonymous], 1987, AMAL SHIA STRUGGLE S; Asad T., 1986, OCCASIONAL PAPERS SE; Bayat Asef, 2010, BEING YOUNG MUSLIM N, P26; Borneman John, 1992, BELONGING 2 BERLINS; Bucholtz M, 2002, ANNU REV ANTHROPOL, V31, P525, DOI 10.1146-annurev.anthro.31.040402.085443; Christiansen Catrine, 2006, NAVIGATING YOUTH GEN, P9; Clarke Morgan, 2009, ISLAM NEW KINSHIP RE; Cole Jennifer, 2007, GENERATIONS GLOBALIZ, P74; Deeb L, 2006, PRINC STUD MUSLIM PO, P1; Griffith R. Marie, 2000, GODS DAUGHTERS EVANG; Hall S., 1975, RESISTANCE RITUALS Y; Harb M., 2010, HEZBOLLAH BANLIEUE V; Hebdige Dick, 1979, SUBCULTURE MEANING S; Herrera Linda, 2009, INT J MIDDLE E STUD, V41, P268; Khosravi S, 2008, CONTEMP ETHNOGR, P1; Mahdavi P., 2009, PASSIONATE UPRISINGS; Mahmood S, 2005, POLITICS OF PIETY: THE ISLAMIC REVIVAL AND THE FEMINIST SUBJECT, P1; Mannheim K., 1952, ESSAYS SOCIOLOGY KNO, P276; Marsden Magnus, 2005, LIVING ISLAM MUSLIM; Masquelier Adeline, 2010, BEING YOUNG MUSLIM N, P226; Melki Jad, 2010, YOUTH ARAB WORLD WOR, V2; MESSICK B, 1986, MAN, V21, P102, DOI 10.2307-2802649; Moors A, 2007, FASH THEORY, V11, P133, DOI 10.2752-136270407x202718; Norton AR, 2007, PRINC STUD MUSLIM PO, P1; Pinto P. G., 2007, COMP STUDIES S ASIA, V27, P109, DOI 10.1215-1089201x-2006-047; Robbins J, 2007, ETHNOS, V72, P293, DOI 10.1080-00141840701576919; Schielke S, 2009, J RELIG AFR, V39, P158, DOI 10.1163-157006609X427814; Schielke Samuli, 2009, J ROYAL ANTHR I, pS24; Schulz DE, 2006, AM ETHNOL, V33, P210, DOI 10.1525-ae.2006.33.2.210; Schulz Dorothea, 2003, J RELIG AFR, V33, P146, DOI 10.1163-15700660360703123; STARRETT G, 1995, AM ANTHROPOL, V97, P51, DOI 10.1525-aa.1995.97.1.02a00090; Swedenburg Ted, 2007, MIDDLE E REPORT, V245, P4; Utas M., 2006, NAVIGATING YOUTH GEN, P31; Wilkins Amy C., 2008, WANNABES GOTHS CHRIS; Winegar Jessica, 2006, CREATIVE RECKONINGS10
Transition Metal Complexes Anchored on Europium Oxide Nanoparticles
No full textPolypyridyl transition metal complexes containing ruthenium, rhodium and iridium centers are mainly studied due to their light absorbing and emitting properties. Lanthanide oxides such as europium oxide absorb light as well and exhibit strong luminescence and long lifetimes. The optical properties of these materials were significant especially in solar energy utilization schemes and optical applications. Energy transfer across a surface is important in several applications including phosphors and biomedical applications. Excited states of metal complexes with a carboxylate-containing ligand such as deeb = diethyl-2,2'-bipyridine-4,4'-dicarboxylate were studied on nanoparticle surfaces. In this work, [Rh(deeb)2Cl2](PF6), [Ir(deeb)2Cl2](PF6) and [Ir(deeb)2(dpp)](PF6)3 were synthesized using the building block approach. The metal complexes were characterized using 1H NMR spectroscopy, mass spectrometry, electronic absorption spectroscopy and electrochemistry. The 1H NMR spectra of the complexes were consistent with those of their ruthenium analogs. Mass spectra contain fragmentation patterns of the (M-PF6)+ molecular ion for [Rh(deeb)2Cl2](PF6) and [Ir(deeb)2Cl2](PF6), and (M-3PF6)3+ molecular ions for [Ir(deeb)2(dpp)](PF6)3. The electronic absorption spectrum of [Rh(deeb)2Cl2](PF6) shows a maximum at 328 nm, which is assigned as 1π→π*transition. The electronic absorption spectrum of [Ir(deeb)2Cl2](PF6) shows maxima at 308 nm and 402 nm, which are assigned as 1π→π* and metal-to-ligand charge transfer transitions, respectively. The [Ir(deeb)2(dpp)](PF6)3 complex exhibits peaks due to 1π→π* transitions at 322 nm and 334 nm. [Rh(deeb)2Cl2](PF6) has emission maxima from the 3LF state at 680 nm and 704 nm for the solid and glassy solutions at 77 K, respectively. [Ir(deeb)2Cl2](PF6) has emission maxima from the 3MLCT state at 538 nm in acetonitrile and 567 nm in the solid state at room temperature, with lifetimes of 1.71 μs and 0.35 μs, respectively. [Ir(deeb)2Cl2](PF6) has an unusually higher quantum yield than analogous compounds. [Ir(deeb)2(dpp)](PF6)3 has emission maxima from the 3IL state at 540 nm in acetonitrile and 599 nm in the solid state at room temperature, with lifetimes of 1.23 μs and 0.14 μs, respectively. Cyclic voltammetry of [Ir(deeb)2Cl2](PF6) and [Ir(deeb)2(dpp)](PF6)3 yield reversible and quasi-reversible couples corresponding to deeb ligand and Ir3+/+reductions, respectively. Attachment of the complexes were conducted by equilibration of complex solutions in acetonitrile with europium oxide nanoparticles. Europium oxide nanoparticles, which were synthesized by gas-phase condensation, have 11-nm diameters and exhibit sharp f-based luminescence in the visible and near IR regions. EDX, TEM, IR and reflectance spectroscopy measurements indicate substantial coating through various modes of attachment of the nanoparticle surface by the metal complexes while retaining the excited state properties of the metal complexes. Surface adsorption studies indicate monolayer coverage of the nanoparticle surface by the metal complexes, consistent with limiting surface coverages of previously reported analogous systems. Eu2O3 nanoparticles modified with [Rh(deeb)2Cl2]+ exhibit minimal to no energy transfer from emission spectra, and a reduction in the lifetime at 77K could be due to the rhodium complex preventing the excitation of Eu3+. Upon attachment of the Ir complexes [Ir(deeb)2Cl2]+ and [Ir(deeb)2(dpp)]3+ on as-prepared nanoparticles, Eu3+ luminescence was observed for nanoparticles modified with iridium complexes at room temperature, which could be due to energy transfer among other possibilities. Efficiencies of 68% and 50%, and energy transfer rate constants of 1.1 x 10-5 and 1.0 x 10-5 were calculated from lifetime data for [Ir(deeb)2Cl2]+ and [Ir(deeb)2(dpp)]3+ on Eu2O3 nanoparticles, respectively. Since iridium complexes are used as components of light-emitting diodes, europium oxide nanoparticles modified with iridium complexes have potential in optical applications which make studies of these compounds interesting.Master of Scienc
Synthesis and characterization of iridium polypyridyl complexes with ester groups with potential applications in covalent attachment to metal oxide surfaces
No full textWe report the synthesis and characterization of two iridium polypyridyl complexes, [Ir(deeb)(2)Cl-2](PF6) and [Ir(deeb)(2)(dpp)](PF6)(3), where deeb diethyl-2,2'-bipyridine-4,4'-dicarboxylate and dpp = 2,3-bis(2-pyridyl) pyrazine. From H-1 NMR spectral data, the two deeb ligands are attached to Ir cis to each other. Mass spectra contain fragmentation patterns of the (M-PF6)(+) and (M-3PF(6))(3+) molecular ions for [Ir(deeb)(2)Cl-2](PF6) and [Ir(deeb)(2)(dpp)](PF6)(3), respectively. The electronic absorption spectrum of [Ir(deeb)(2)Cl-2](PF6) shows maxima at 308nm and 402 nm, which are assigned as (1)pi -> pi* and metal-to-ligand charge transfer transitions, respectively. [Ir(deeb)(2)(dpp)](P(F)6)(3) exhibits peaks due to (1)pi -> pi* transitions at 322nm and 334 nm. [Ir(deeb)(2)Cl-2](PF6) has emission peaks at 538nm in acetonitrile and 567nm in the solid state, with lifetimes of 1.71 mu s and 0.35 mu s, respectively. [Ir(deeb)(2)Cl-2](PF6) has an unusually higher quantum yield than analogous compounds. [Ir(deeb)(2)(dpp)](PF6)(3) has emission peaks at 540nm in acetonitrile and 599nm in the solid state with lifetimes of 1.23 mu s and 0.14 mu s, respectively. Cyclic voltammetry of [Ir(deeb)(2)Cl-2](PF6) yields two reversible couples at -0.72 and -0.87V versus Ag/AgCl, both corresponding to deeb ligand reductions, and a quasi-reversible couple at -1.48V corresponding to Ir3+/+ reduction. Electrochemical reduction of [Ir(deeb)(2)(dpp)](PF6)(3) yields couples at -0.38, -0.54, -0.71, and -1.33 V, assigned as deeb(0/-), deeb(0/-), dpp(0/-), and Ir3+/+ reductions, respectively
Influence of ion pairing on the oxidation of iodide by MLCT excited states
No full textThe oxidation of iodide to diiodide, I2[radical dot]-, by the metal-to-ligand charge-transfer (MLCT) excited state of [Ru(deeb)3]2+, where deeb is 4,4[prime or minute]-(CO2CH2CH3)2-2,2[prime or minute]-bipyridine, was quantified in acetonitrile and dichloromethane solution at room temperature. The redox and excited state properties of [Ru(deeb)3]2+ were similar in the two solvents; however, the mechanisms for excited state quenching by iodide were found to differ significantly. In acetonitrile, reaction of [Ru(deeb)3]2+* and iodide was dynamic (lifetime quenching) with kinetics that followed the Stern-Volmer model (KD = 1.0 +/- 0.01 [times] 105 M-1, kq = 4.8 [times] 1010 M-1 s-1). Excited state reactivity was observed to be the result of reductive quenching that yielded the reduced ruthenium compound, [Ru(deeb-)(deeb)2]+, and the iodine atom, I[radical dot]. In dichloromethane, excited state quenching was primarily static (photoluminescence amplitude quenching) and [Ru(deeb-)(deeb)2]+ formed within 10 ns, consistent with the formation of ion pairs in the ground state that react rapidly upon visible light absorption. In both solvents the appearance of I2[radical dot]- could be time resolved. In acetonitrile, the rate constant for I2[radical dot]- growth, 2.2 +/- 0.2 [times] 1010 M-1 s-1, was found to be about a factor of two slower than the formation of [Ru(deeb-)(deeb)2]+, indicating it was a secondary photoproduct. The delayed appearance of I2[radical dot]- was attributed to the reaction of iodine atoms with iodide. In dichloromethane, the growth of I2[radical dot]-, 1.3 +/- 0.4 [times] 1010 M-1 s-1, was similar to that in acetonitrile, yet resulted from iodine atoms formed within the laser pulse. These results are discussed within the context of solar energy conversion by dye-sensitized solar cells and storage via chemical bond formation.</p
DS2_JVDI_10.1177_1040638718799388 – Supplemental material for Development and evaluation of a multiplex reverse-transcription real-time PCR assay for detection of equine respiratory disease viruses
No full textSupplemental material, DS2_JVDI_10.1177_1040638718799388 for Development and evaluation of a multiplex reverse-transcription real-time PCR assay for detection of equine respiratory disease viruses by Shimaa M. Ghoniem, Ayman H. El Deeb, Mohammed G. Aggour and Hussein A. Hussein in Journal of Veterinary Diagnostic Investigation</p
DS1_JVDI_10.1177_1040638718799388 – Supplemental material for Development and evaluation of a multiplex reverse-transcription real-time PCR assay for detection of equine respiratory disease viruses
No full textSupplemental material, DS1_JVDI_10.1177_1040638718799388 for Development and evaluation of a multiplex reverse-transcription real-time PCR assay for detection of equine respiratory disease viruses by Shimaa M. Ghoniem, Ayman H. El Deeb, Mohammed G. Aggour and Hussein A. Hussein in Journal of Veterinary Diagnostic Investigation</p
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
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