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https://www.readbyqxmd.com/read/29786911/esipt-modulated-emission-of-lanthanide-complexes-different-energy-transfer-pathway-and-multi-responses
#1
Si-Si Sun, Zheng Wang, Xiang Wen Wu, Jian-Hua Zhang, Chao-Jie Li, Shao-Yun Yin, Ling Chen, Mei Pan, Cheng-Yong Su
Two series of isostructural lanthanide coordination complexes, namely, LIFM-42(Ln), Ln = Eu, Tb, Gd, and LIFM-43(Ln), Ln = Er, Yb) were synthesized through the self-assembly of an ESIPT (excited-state intramolecular proton transfer) ligand, H2hpi2cf (5-(2-(5-fluoro-2-hydroxyphenyl)-4,5-bis(4-fluorophenyl)-1H-imidazol-1-yl)isophthalic acid) with different lanthanide ions. In the coordination structures linked by the ligands and oxo-bridged LnIII2 clusters (for LIFM-42(Ln) series) or isolated LnIII ions (for LIFM-43(Ln) series), the ESIPT ligand can serve as both the host and antenna for protecting and sensitizing the photoluminescence (PL) of LnIII ions...
May 22, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29786673/fabrication-flexible-and-luminescent-nanofibrillated-cellulose-films-with-modified-sral%C3%A2-o%C3%A2-eu-dy-phosphors-via-nanoscale-silica-and-aminosilane
#2
Longfei Zhang, Shaoyi Lyu, Zhilin Chen, Siqun Wang
Flexible 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)-oxidized nanofibrillated cellulose (ONFC) films with long afterglow luminescence containing modified SrAl₂O₄: Eu2+ , Dy3+ (SAOED) phosphors were fabricated by a template method. Tetraethyl orthosilicate (TEOS) and (3-aminopropyl) trimethoxy-silane (APTMS) were employed cooperatively to improve the water resistance and compatibility of the SAOED particles in the ONFC suspension. The structure and morphology after modification evidenced the formation of a superior SiO₂ layer and coarse amino-compounds on the surface of the phosphors...
May 22, 2018: Nanomaterials
https://www.readbyqxmd.com/read/29786100/a-multifunctional-eu-cp-as-a-recyclable-luminescent-probe-for-the-highly-sensitive-detection-of-fe-3-fe-2-cr-2-o-7-2-and-nitroaromatic-explosives
#3
Yang Yang, Fangzhou Qiu, Cong Xu, Yan Feng, Guolin Zhang, Weisheng Liu
A novel 2D lanthanide coordination polymer {Eu-CP (1)} based on a 3-bis(3-carboxyphenyl)imidazolium (L) ligand was successfully assembled through a solvothermal method. Luminescence tests indicate that 1 has excellent selectivity and sensitivity to detect Fe3+/Fe2+, Cr2O72-, and a series of nitroaromatic explosives. Interestingly, 1 can effectively distinguish CrVI anions (CrO42-/Cr2O72-), which is difficult for most of the reported CPs. Furthermore, in the detection process, 1 can be simply and quickly regenerated and reused at least five times...
May 22, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29785778/stakeholder-identities-in-britain-s-neoliberal-ethical-community-polish-narratives-of-earned-citizenship-in-the-context-of-the-uk-s-eu-referendum
#4
Derek McGhee, Chris Moreh, Athina Vlachantoni
This article examines the narrative strategies through which Polish migrants in the UK challenge the formal rights of political membership and attempt to redefine the boundaries of 'citizenship' along notions of deservedness. The analysed qualitative data originate from an online survey conducted in the months before the 2016 EU referendum, and the narratives emerge from the open-text answers to two survey questions concerning attitudes towards the referendum and the exclusion of resident EU nationals from the electoral process...
May 21, 2018: British Journal of Sociology
https://www.readbyqxmd.com/read/29785508/lacosamide-a-review-in-focal-onset-seizures-in-patients-with-epilepsy
#5
Sheridan M Hoy
Lacosamide (Vimpat® ) is a functionalized amino acid (available orally and intravenously) approved in the EU and the USA for use as monotherapy and adjunctive therapy for the treatment of focal-onset seizures in adults, adolescents and children aged ≥ 4 years with epilepsy. In adults and adolescents (aged ≥ 16 years), oral lacosamide as adjunctive therapy to other antiepileptic drugs was generally effective in reducing seizure frequency during short-term (up to 18 weeks) treatment, with efficacy sustained over the longer-term (up to 8 years)...
May 21, 2018: CNS Drugs
https://www.readbyqxmd.com/read/29785431/slow-magnetic-relaxation-and-luminescence-properties-in-lanthanide-iii-anil-complexes
#6
Diamantoula Maniaki, Ioannis Mylonas-Margaritis, Julia Mayans, Aikaterini Savvidou, Catherine P Raptopoulou, Vlasoula Bekiari, Vassilis Psycharis, Albert Escuer, Spyros P Perlepes
The initial use of anils, i.e. bidentate Schiff bases derived from the condensation of anilines with salicylaldehyde or its derivatives, in 4f-metal chemistry is described. The 1 : 1 reactions between Ln(NO3)3·xH2O (Ln = lanthanide) or Y(NO3)3·6H2O and N-(5-bromosalicylidene)aniline (5BrsalanH) in MeCN has provided access to complexes [Ln(NO3)3(5BrsalanH)2(H2O)]·MeCN (Ln = Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb) and [Y(NO3)3(5BrsalanH)2(H2O)]·MeCN, respectively, in good yields. The structures of the isomorphous complexes with Ln = Pr(1·MeCN), Sm(3·MeCN), Gd(5·MeCN), Dy(7·MeCN) and Er(9·MeCN) have been determined by single-crystal X-ray crystallography...
May 22, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29785340/comparing-the-catch-composition-profitability-and-discard-survival-from-different-trammel-net-designs-targeting-common-spiny-lobster-palinurus-elephas-in-a-mediterranean-fishery
#7
Gaetano Catanese, Hilmar Hinz, Maria Del Mar Gil, Miquel Palmer, Michael Breen, Antoni Mira, Elena Pastor, Amalia Grau, Andrea Campos-Candela, Elka Koleva, Antoni Maria Grau, Beatriz Morales-Nin
In the Balearic Islands, different trammel net designs have been adopted to promote fisheries sustainability and reduce discards. Here, we compare the catch performance of three trammel net designs targeting the spiny lobster Palinurus elephas in terms of biomass, species composition and revenue from commercial catches and discards. Designs differ in the netting fiber type (standard polyfilament, PMF, or a new polyethylene multi-monofilament, MMF) and the use of a guarding net or greca , a mesh piece intended to reduce discards...
2018: PeerJ
https://www.readbyqxmd.com/read/29785280/long-duration-of-immunity-against-a-type-1-heterologous-prrs-virus-challenge-in-pigs-immunised-with-a-novel-prrs-mlv-vaccine-a-randomised-controlled-study
#8
Jeremy Kroll, Mike Piontkowski, Poul H Rathkjen, Francois-Xavier Orveillon, Christian Kraft, Oliver G Duran
Background: Porcine reproductive and respiratory syndrome virus (PRRSV) is widespread in commercial pig farms worldwide, and has a significant cost to the swine industry. Herd owners need a vaccine that will confer long-lasting immunity to prevent PRRSV infection and transmission. The studies described here evaluated duration of immunity conferred by a European-derived PRRS (isolate 94,881) modified live virus (MLV) vaccine, Ingelvac PRRSFLEX® EU, at 20, 24, and 26 weeks post-vaccination...
2018: Porcine Health Management
https://www.readbyqxmd.com/read/29783716/photovoltaic-performance-enhancement-of-silicon-solar-cells-based-on-combined-ratios-of-three-species-of-europium-doped-phosphors
#9
Wen-Jeng Ho, Bang-Jin You, Jheng-Jie Liu, Wen-Bin Bai, Hong-Jhang Syu, Ching-Fuh Lin
This paper presents a scheme for the enhancement of silicon solar cells in terms of luminescent emission band and photovoltaic performance. The proposed devices are coated with an luminescent down-shifting (LDS) layer comprising three species of europium (Eu)-doped phosphors mixed within a silicate film (SiO₂) using a spin-on film deposition. The three species of phosphor were mixed at ratios of 0.5:1:1.5, 1:1:1, or 1.5:1:0.5 in weight percentage (wt %). The total quantity of Eu-doped phosphors in the silicate solution was fixed at 3 wt %...
May 18, 2018: Materials
https://www.readbyqxmd.com/read/29780889/how-to-conceptualize-and-implement-a-phd-program-in-health-sciences-the-basel-approach
#10
Franziska Keller, Suzanne Dhaini, Matthias Briel, Sina Henrichs, Christoph Höchsmann, Daniel Kalbermatten, Nino Künzli, Annette Mollet, Christian Puelacher, Arno Schmidt-Trucksäss, Belinda von Niederhäusern, Sabina De Geest
Objectives: Over the past decade, several excellent guidelines have been published on how to enhance the quality of PhD education in Europe. Aimed primarily at preparing students for innovative roles in their fields, they include variously structured approaches to curricular offerings, as well as other program components applicable across specialties (eg: supervisor support, scientific conduct, transferable skills). Since 2012, the interdisciplinary PhD Program in Health Sciences (PPHS) at the Faculty of Medicine of the University of Basel in Switzerland has focused on translating these guidelines into a 21st-century health sciences PhD program...
January 2018: Journal of Medical Education and Curricular Development
https://www.readbyqxmd.com/read/29780447/fluorinated-eu-ii-based-multimodal-contrast-agent-for-temperature-and-redox-responsive-magnetic-resonance-imaging
#11
Lina A Basal, Matthew D Bailey, Jonathan Romero, Meser M Ali, Lyazat Kurenbekova, Jason Yustein, Robia G Pautler, Matthew J Allen
Magnetic resonance imaging (MRI) using redox-active, EuII -containing complexes is one of the most promising techniques for noninvasively imaging hypoxia in vivo . In this technique, positive ( T 1 -weighted) contrast enhancement persists in areas of relatively low oxidizing ability, such as hypoxic tissue. Herein, we describe a fluorinated, EuII -containing complex in which the redox-active metal is caged by intramolecular interactions. The position of the fluorine atoms enables temperature-responsive contrast enhancement in the reduced form of the contrast agent and detection of the oxidized contrast agent via MRI in vivo ...
December 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/29778708/fluorescence-resonance-energy-transfer-of-caf-2-eu-2-tb-3-applied-to-dye-sensitized-solar-cells
#12
Lege Wang, Zijian Yang, You-Fen Li, Ru Yang, Zhigang Dai, Shuqiao Hu, Liangliang Sun, Yaoyao Tong
CaF2 : Eu2+ , Tb3+ introduced into dye-sensitized solar cells (DSSCs) were studied to examine the influence of luminescent materials on photoanodes using a simple method. The emission spectra of CaF2 : Eu2+ , Tb3+ included the blue light of Eu2+ (4f → 5d) at 430 nm and green emission of Tb3+ (5 D4  → 7 F5 ) at 542 nm under the monitoring wavelengths at 398 nm, which matched well the absorption range of the N719 dye in DSSCs. Energy transfer (ET) was verified between Eu2+ and Tb3+ ions and the efficiency of ET found to increase with Tb3+ concentration...
May 4, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29778681/portable-x-ray-fluorescence-for-the-detection-of-pop-bfrs-in-waste-plastics
#13
Martin Sharkey, Mohamed Abou-Elwafa Abdallah, Daniel S Drage, Stuart Harrad, Harald Berresheim
The purpose of this study was to establish the efficacy of portable X-ray fluorescence (XRF) instrumentation as a screening tool for a variety of end of life plastics which may contain excess amounts of brominated flame retardants (BFRs), in compliance with European Union (EU) and United Nations Environment Programme (UNEP) legislative limits (low POP concentration limits - LPCLs). 555 samples of waste plastics were collected from eight waste and recycling sites in Ireland, including waste electrical and electronic equipment (WEEE), textiles, polyurethane foams (PUFs), and expanded polystyrene foams...
May 17, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29778396/how-effective-are-approaches-to-migrant-screening-for-infectious-diseases-in-europe-a-systematic-review
#14
REVIEW
Farah Seedat, Sally Hargreaves, Laura B Nellums, Jing Ouyang, Michael Brown, Jon S Friedland
Rates of migration to Europe, and within Europe, have increased in recent years, with considerable implications for health systems. Migrants in Europe face a disproportionate burden of tuberculosis, HIV, and hepatitis B and C, yet experience a large number of barriers to accessing statutory health care on arrival. A better understanding of how to deliver effective and cost-effective screening, vaccination, and health services to this group is now crucial. We did a systematic review to document and assess the effectiveness and cost-effectiveness of approaches used for infectious diseases screening, and to explore facilitators and barriers experienced by migrants to accessing screening programmes...
May 16, 2018: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/29778207/evolution-in-europe-of-african-swine-fever-genotype-ii-viruses-from-highly-to-moderately-virulent
#15
Gallardo C, Nurmoja I, Soler A, Delicado V, Simón A, Martin E, Perez C, Nieto R, Arias M
Since its arrival in the Caucasus and Russia in 2007, African swine fever virus (ASFV) has spread widely and has now affected the EU countries of Estonia, Latvia, Lithuania, Poland and, more recently, the Czech Republic and Romania. The ever-increasing evidence of seropositive wild boar in certain areas suggests that some animals may be surviving for some time or could even be recovering from the disease. This could be due to acquired immunity after the primary infection and/or the presence of related viruses of reduced virulence...
June 2018: Veterinary Microbiology
https://www.readbyqxmd.com/read/29778078/an-effective-and-low-cost-carbon-based-clean-up-method-for-pcdd-fs-and-pcbs-analysis-in-food
#16
Kleopatra Kedikoglou, Danae Costopoulou, Irene Vassiliadou, Evangelos Bakeas, Leondios Leondiadis
Sample preparation is of critical importance in dioxin analysis of food and feed samples. It is a complex procedure that includes lipid extraction followed by the application of chromatographic separation techniques, aiming in removing undesirable interferences from the matrix. The separation of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) from polychlorinated biphenyls (PCBs) is achieved by carbon-based materials which should have high fat capacity in order to be suitable for lipid-containing matrices...
May 7, 2018: Chemosphere
https://www.readbyqxmd.com/read/29776336/phylogenomic-analysis-of-apoidea-sheds-new-light-on-the-sister-group-of-bees
#17
Manuela Sann, Oliver Niehuis, Ralph S Peters, Christoph Mayer, Alexey Kozlov, Lars Podsiadlowski, Sarah Bank, Karen Meusemann, Bernhard Misof, Christoph Bleidorn, Michael Ohl
BACKGROUND: Apoid wasps and bees (Apoidea) are an ecologically and morphologically diverse group of Hymenoptera, with some species of bees having evolved eusocial societies. Major problems for our understanding of the evolutionary history of Apoidea have been the difficulty to trace the phylogenetic origin and to reliably estimate the geological age of bees. To address these issues, we compiled a comprehensive phylogenomic dataset by simultaneously analyzing target DNA enrichment and transcriptomic sequence data, comprising 195 single-copy protein-coding genes and covering all major lineages of apoid wasps and bee families...
May 18, 2018: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/29775351/masses-and-%C3%AE-decay-spectroscopy-of-neutron-rich-odd-odd-160-162-eu-nuclei-evidence-for-a-subshell-gap-with-large-deformation-at-n-98
#18
D J Hartley, F G Kondev, R Orford, J A Clark, G Savard, A D Ayangeakaa, S Bottoni, F Buchinger, M T Burkey, M P Carpenter, P Copp, D A Gorelov, K Hicks, C R Hoffman, C Hu, R V F Janssens, J W Klimes, T Lauritsen, J Sethi, D Seweryniak, K S Sharma, H Zhang, S Zhu, Y Zhu
The structure of deformed neutron-rich nuclei in the rare-earth region is of significant interest for both the astrophysics and nuclear structure fields. At present, a complete explanation for the observed peak in the elemental abundances at A∼160 eludes astrophysicists, and models depend on accurate quantities, such as masses, lifetimes, and branching ratios of deformed neutron-rich nuclei in this region. Unusual nuclear structure effects are also observed, such as the unexpectedly low energies of the first 2^{+} levels in some even-even nuclei at N=98...
May 4, 2018: Physical Review Letters
https://www.readbyqxmd.com/read/29775048/selective-crystallization-of-four-tungstates-la-2-w-3-o-12-la-2-w-2-o-9-la-14-w-8-o-45-and-la-6-w-2-o-15-via-hydrothermal-reaction-and-comparative-study-of-eu-3-luminescence
#19
Xiaofei Shi, Zhihao Wang, Toshiaki Takei, Xuejiao Wang, Qi Zhu, Xiaodong Li, Byung-Nam Kim, Xudong Sun, Ji-Guang Li
Hydrothermal reaction at 200 °C was systematically undertaken in wide ranges of solution pH (4-13) and W/La molar ratio ( R = 0.5-2), without using any organic additive, to investigate the effect of hydrothermal parameter on product property and the underlying mechanism. Combined analysis by X-ray diffraction (XRD), inductively coupled plasma (ICP) spectroscopy, elemental mapping, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) revealed that either a decreasing pH or increasing R value yielded a product richer in W and, conversely, richer in La...
May 18, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29774904/investigating-subtle-4f-vs-5f-coordination-differences-using-kinetically-inert-eu-iii-tb-iii-and-cm-iii-complexes-of-a-coumarin-appended-1-4-7-10-tetraazacyclododecane-1-4-7-triacetate-do3a-ligand
#20
Anne Kathrine R Junker, Gauthier J-P Deblonde, Rebecca J Abergel, Thomas Just Sørensen
In order to reveal subtle differences between the solution chemistries of trivalent 4f and 5f elements, the physicochemical and photophysical properties of europium(iii), terbium(iii) and curium(iii) complexes formed with a 7-methoxy-coumarin appended 1,4,7,10-tetraazadodecane-1,4,7-triacid (DO3A) ligand were studied. All three complexes were found to be kinetically inert and exhibit stability constants similar to their 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA) equivalents. The Cm(iii) and Eu(iii) complexes feature strong sensitised emission, while the triplet energy of the coumarin prohibits efficient sensitisation of the Tb(iii) analogue...
May 18, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
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