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https://www.readbyqxmd.com/read/28324687/variation-of-natural-radionuclides-in-non-ferrous-fayalite-slags-during-a-one-month-production-period
#1
Tom Croymans, Indy Vandael Schreurs, Mikael Hult, Gerd Marissens, Guillaume Lutter, Heiko Stroh, Sonja Schreurs, Wouter Schroeyers
The European Basic Safety Standards (EU-BSS) describes a set of NORM (Naturally Occurring Radioactive Material)-processing industries which produce residues known to be possibly enriched in NORs (Naturally Occurring Radionuclides). These residues can be used as a component in building materials aimed for public usage. The industrial processes, in which the residues are produced, are often complex and total monitoring can be challenging especially when the origin of the used raw materials varies. In this study the NORs present in non-ferrous fayalite slags of a secondary smelter facility, a NORM-processing industry according to the EU-BSS, were monitored daily during a one-month production period...
March 18, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28316361/iminophosphanes-synthesis-rhodium-complexes-and-ruthenium-ii-catalyzed-hydration-of-nitriles
#2
Mark K Rong, Koen van Duin, Tom van Dijk, Jeroen J M de Pater, Berth-Jan Deelman, Martin Nieger, A W Ehlers, J Chris Slootweg, Koop Lammertsma
Highly stable iminophosphanes, obtained from alkylating nitriles and reaction of the resulting nitrilium ions with secondary phosphanes, were explored as tunable P-monodentate and 1,3-P,N bidentate ligands in rhodium complexes. X-ray crystal structures are reported for both κ(1) and κ(2) complexes with the counterion in one of them being an unusual anionic coordination polymer of silver triflate. The iminophosphane-based ruthenium(II)-catalyzed hydration of benzonitrile in 1,2-dimethoxyethane (180 °C, 3 h) and water (100 °C, 24 h) and under solvent free conditions (180 °C, 3 h) results in all cases in the selective formation of benzamide with yields of up to 96%, thereby outperforming by far the reactions in which the common 2-pyridyldiphenylphosphane is used as the 1,3-P,N ligand...
March 13, 2017: Organometallics
https://www.readbyqxmd.com/read/28314053/fish-for-dinner-balancing-risks-benefits-and-values-in-formulating-food-consumption-advice
#3
Karen Rideout, Tom Kosatsky
Many and complex factors underlie seemingly simple decisions about what to eat. This is particularly so for foods such as fish, which present consumers with both risks and benefits. Advice about what type of and how much fish to consume is abundant, but that advice is often confusing or contradictory, reflecting the differing mandates and orientations of those advising. We survey a range of issues that can and should be incorporated into dietary advice, and offer tools for health agencies tasked with providing it...
March 17, 2017: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/28299929/metal-transfer-among-organs-following-acute-and-chronic-exposures-using-autoradiography-cadmium-bioaccumulation-by-macrobrachium-australiense
#4
Tom Cresswell, Debashish Mazumder, Paul D Callaghan, An Phuc Nguyen, Michael Corry, Stuart L Simpson
The uptake, depuration and organ distribution of the radioisotope 109Cd was used to explore the internal kinetics of this non-essential metal following accumulation from solution by the freshwater decapod crustacean Macrobrachium australiense. Acute (6 h) and chronic (7 to 14 d) exposures to the radioisotope in solutions of 0.56 µg Cd/L, were followed by depuration in metal- and isotope-free water for up to 21 d. The anatomical distribution of the radionuclide was visualised using autoradiography at pre-defined time points...
March 16, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28294262/speciation-of-indium-iii-chloro-complexes-in-the-solvent-extraction-process-from-chloride-aqueous-solutions-to-ionic-liquids
#5
Clio Deferm, Bieke Onghena, Tom Vander Hoogerstraete, Dipanjan Banerjee, Jan Luyten, Harald Oosterhof, Jan Fransaer, Koen Binnemans
Most metal extraction studies focus on the kinetics, the maximum loading and the extraction equilibrium, while structural information on the extracted complexes has been limited. This paper concerns the nature of the indium(iii) chloride complexes, present in the organic and aqueous phase during the solvent extraction of indium(iii) from an aqueous HCl solution by undiluted ionic liquids Cyphos(®) IL 101 and Aliquat(®) 336. In an aqueous HCl solution (0-12 M), indium(iii) exists as octahedral mixed complexes, [In(H2O)6-nCln](3-n) (0 ≤ n ≤ 6)...
March 15, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28291620/pacing-in-congenital-heart-disease-a-four-decade-experience-in-a-single-tertiary-centre
#6
Disha Midha, Zhong Chen, David G Jones, Howell J Williams, Karen Lascelles, Julian Jarman, Jonathan Clague, Janice Till, Konstatinos Dimopoulos, Sonya V Babu-Narayan, Vias Markides, Michael A Gatzoulis, Tom Wong
BACKGROUND: The increased risk of brady- and tachy-arrhythmias in the congenital heart disease (CHD) population means that cardiac rhythm management devices are often required at an early age and expose patients to device-related complications. The present study drew upon four decades of experience at a tertiary adult congenital heart disease ACHD center and aimed to investigate the indication for cardiac implantable electronic devices (CIEDs) and predictors of late device-related complication requiring re-intervention...
March 6, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28287315/near-infrared-spectroscopy-and-geostatistical-analysis-for-modeling-spatial-distribution-of-analytical-constituents-in-bulk-animal-by-product-protein-meals
#7
José A Adame-Siles, Tom Fearn, José E Guerrero-Ginel, Ana Garrido-Varo, Francisco Maroto-Molina, Dolores Pérez-Marín
Control and inspection operations within the context of safety and quality assessment of bulk foods and feeds are not only of particular importance, they are also demanding challenges, given the complexity of food/feed production systems and the variability of product properties. Existing methodologies have a variety of limitations, such as high costs of implementation per sample or shortcomings in early detection of potential threats for human/animal health or quality deviations. Therefore, new proposals are required for the analysis of raw materials in situ in a more efficient and cost-effective manner...
March 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28287263/generation-of-hydrofluoronickelacycles-from-trifluoroethylene-and-ni-0-ligand-effects-on-regio-stereoselectivity-and-reactivity
#8
Kaitie A Giffin, Lorraine A Pua, Sarah Piotrkowski, Bulat M Gabidullin, Ilia Korobkov, Russell P Hughes, R Tom Baker
Treatment of Ni(0) complexes 1a-e with sub-atmospheric pressures of trifluoroethylene (TrFE) affords hydrofluoronickelacyclopentanes L2Ni(C4F6H2) 2a-e (L = PPh3, P(O-o-tol)3, PPh2Me, PPhMe2, PMe3). Fluorine NMR analysis of 2a-e demonstrates predominant formation of three (of the possible six) isomers upon oxidative cycloaddition of TrFE: the cis and trans head-tail isomers and the trans head-head isomer, where the CHF group is defined as the TrFE "head". The respective ratios of L2Ni(C4F6H2) isomers are influenced by the nature of L, with smaller phosphines favoring the thermodynamically preferred (from DFT calculations) trans head-head isomer (cf...
March 13, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28286332/two-alternative-binding-mechanisms-connect-the-protein-translocation-sec71-sec72-complex-with-heat-shock-proteins
#9
Arati Tripathi, Elisabet C Mandon, Reid Gilmore, Tom A Rapoport
The biosynthesis of many eukaryotic proteins requires accurate targeting to and translocation across the endoplasmic reticulum (ER) membrane. Post-translational protein translocation in yeast requires both the Sec61 translocation channel, and a complex of four additional proteins: Sec63, Sec62, Sec71, and Sec72. The structure and function of these proteins are largely unknown. This pathway also requires the cytosolic Hsp70 protein Ssa1, but whether Ssa1 associates with the translocation machinery to target protein substrates to the membrane is unclear...
March 12, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28285357/alternative-outcomes-of-pathogenic-complex-somatic-structural-variations-in-the-genomes-of-nf1-and-nf2-patients
#10
Meng-Chang Hsiao, Arkadiusz Piotrowski, Andrzej Brunon Poplawski, Tom Callens, Chuanhua Fu, Ludwine Messiaen
Multiplex ligation-dependent probe amplification (MLPA) has been widely used to identify copy-number variations (CNVs), but MLPA's sensitivity and specificity in mosaic CNV detection are largely unknown. Here, we present two mosaic deletions identified by MLPA as NF1 deletion of exons 17-21 and NF2 deletion of exons 9-10. Through cDNA analysis, genomic breakpoint-spanning PCR and Sanger sequencing, we found however both NF1 and NF2 deletions are each composed of two consecutive deletions, which cannot be differentiated by MLPA...
March 11, 2017: Neurogenetics
https://www.readbyqxmd.com/read/28283681/gene-expression-analyses-in-tomato-near-isogenic-lines-provide-evidence-for-ethylene-and-abscisic-acid-biosynthesis-fine-tuning-during-arbuscular-mycorrhiza-development
#11
Giselle Gomes Monteiro Fracetto, Lázaro Eustáquio Pereira Peres, Marcio Rodrigues Lambais
Plant responses to the environment and microorganisms, including arbuscular mycorrhizal fungi, involve complex hormonal interactions. It is known that abscisic acid (ABA) and ethylene may be involved in the regulation of arbuscular mycorrhiza (AM) and that part of the detrimental effects of ABA deficiency in plants is due to ethylene overproduction. In this study, we aimed to determine whether the low susceptibility to mycorrhizal colonization in ABA-deficient mutants is due to high levels of ethylene and whether AM development is associated with changes in the steady-state levels of transcripts of genes involved in the biosynthesis of ethylene and ABA...
March 11, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28280686/the-first-week-after-concussion-blood-flow-brain-function-and-white-matter-microstructure
#12
Nathan W Churchill, Michael G Hutchison, Doug Richards, General Leung, Simon J Graham, Tom A Schweizer
Concussion is a major health concern, associated with short-term deficits in physical function, emotion and cognition, along with negative long-term health outcomes. However, we remain in the early stages of characterizing MRI markers of concussion, particularly during the first week post-injury when symptoms are most severe. In this study, 52 varsity athletes were scanned using Magnetic Resonance Imaging (MRI), including 26 athletes with acute concussion (scanned 1-7 days post-injury) and 26 matched control athletes...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28279810/madagascar-sheds-new-light-on-the-molecular-systematics-and-biogeography-of-grammitid-ferns-new-unexpected-lineages-and-numerous-long-distance-dispersal-events
#13
Lucie Bauret, Myriam Gaudeul, Michael A Sundue, Barbara S Parris, Tom A Ranker, France Rakotondrainibe, Sabine Hennequin, Jaona Ranaivo, Marc-André Selosse, Germinal Rouhan
Based on a worldwide phylogenetic framework filling the taxonomic gap of Madagascar and surrounding islands of the Western Indian Ocean (WIO), we revisited the systematics of grammitid fern species (Polypodiaceae). We also investigated the biogeographic origin of the extant diversity in Madagascar and estimated the relative influence of vicariance, long-distance dispersals (LDD) and in situ diversification. Phylogenetic inferences were based on five plastid DNA regions (atpB, rbcL, rps4-trnS, trnG-trnR, trnL-trnF) and the most comprehensive taxonomic sampling ever assembled (224 species belonging to 31 out of 33 recognized grammitids genera)...
March 6, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28277206/location-location-location-characteristics-and-services-of-long-stay-home-care-recipients-in-retirement-homes-compared-to-others-in-private-homes-and-long-term-care-homes
#14
Jeffrey W Poss, Chi-Ling Joanna Sinn, Galina Grinchenko, Jane Blums, Tom Peirce, John Hirdes
We examine recipients of publicly funded ongoing care in a single Ontario jurisdiction who reside in three different settings: long-stay home care patients in private homes and apartments, other patients in retirement homes and residents of long-term care homes, using interRAI assessment instruments. Among home care patients, those in retirement homes have higher proportions of dementia and moderate cognitive impairment, less supportive informal care systems as well as more personal care and nursing services above those provided by the public home care system, more frequent but shorter home support visits and lower than expected public home care expenditures...
February 2017: Healthcare Policy, Politiques de Santé
https://www.readbyqxmd.com/read/28276027/analysis-of-mitochondrial-membrane-protein-complexes-by-electron-cryo-tomography
#15
Vicki A M Gold, Tobias Brandt, Laetitia Cavellini, Mickael M Cohen, Raffaele Ieva, Martin van der Laan
The visualization of membrane protein complexes in their natural membrane environment is a major goal in an emerging area of research termed structural cell biology. Such approaches provide important information on the spatial distribution of protein complexes in their resident cellular membrane systems and on the structural organization of multi-subunit membrane protein assemblies. We have developed a method to specifically label active membrane protein complexes in their native membrane environment with electron-dense nanoparticles coupled to an activating ligand, in order to visualize them by electron cryo-tomography...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28271472/the-canonical-inflammasome-a-macromolecular-complex-driving-inflammation
#16
Tom P Monie
The inflammasome is a multi-molecular platform crucial to the induction of an inflammatory response to cellular danger. Recognition in the cytoplasm of endogenously and exogenously derived ligands initiates conformational change in sensor proteins, such as NLRP3, that permits the subsequent rapid recruitment of adaptor proteins, like ASC, and the resulting assembly of a large-scale inflammatory signalling platform. The assembly process is driven by sensor-sensor interactions as well as sensor-adaptor and adaptor-adaptor interactions...
2017: Sub-cellular Biochemistry
https://www.readbyqxmd.com/read/28262569/pilot-trial-of-tobramycin-inhalation-powder-in-cystic-fibrosis-patients-with-chronic-burkholderia-cepacia-complex-infection
#17
Valerie Waters, Yvonne Yau, Trevor Beaudoin, Jillian Wettlaufer, Sean Kevin Tom, Nancy McDonald, Leena Rizvi, Michelle Klingel, Felix Ratjen, Elizabeth Tullis
There is no effective chronic suppressive therapy Burkholderia cepacia complex infection in cystic fibrosis (CF) patients. This was a pilot, open-label clinical trial of tobramycin inhalation powder (TIP) delivered via Podhaler twice daily for 28days in adults and children with CF and chronic B. cepacia complex infection in Toronto, Canada. A total of 10 subjects (4 pediatric, 6 adult patients) were treated. There was a mean drop of 1.4 log (CFU/ml) in sputum bacterial density (p=0.01) and sputum IL-8 levels decreased significantly after 28days of TIP (p=0...
March 2, 2017: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/28261468/water-land-fire-and-forest-multi-scale-determinants-of-rainforests-in-the-australian-monsoon-tropics
#18
Stefania Ondei, Lynda D Prior, Grant J Williamson, Tom Vigilante, David M J S Bowman
The small rainforest fragments found in savanna landscapes are powerful, yet often overlooked, model systems to understand the controls of these contrasting ecosystems. We analyzed the relative effect of climatic variables on rainforest density at a subcontinental level, and employed high-resolution, regional-level analyses to assess the importance of landscape settings and fire activity in determining rainforest density in a frequently burnt Australian savanna landscape. Estimates of rainforest density (ha/km(2)) across the Northern Territory and Western Australia, derived from preexisting maps, were used to calculate the correlations between rainforest density and climatic variables...
March 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28261452/bigger-is-better-changes-in-body-size-explain-a-maternal-effect-of-food-on-offspring-disease-resistance
#19
Jennie S Garbutt, Tom J Little
Maternal effects triggered by changes in the environment (e.g., nutrition or crowding) can influence the outcome of offspring-parasite interactions, with fitness consequences for the host and parasite. Outside of the classic example of antibody transfer in vertebrates, proximate mechanisms have been little studied, and thus, the adaptive significance of maternal effects on infection is not well resolved. We sought to determine why food-stressed mothers give birth to offspring that show a low rate of infection when the crustacean Daphnia magna is exposed to an orally infective bacterial pathogen...
March 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28260402/cost-and-survival-analysis-before-and-after-implementation-of-dana-farber-clinical-pathways-for-patients-with-stage-iv-non-small-cell-lung-cancer
#20
David M Jackman, Yichen Zhang, Carole Dalby, Tom Nguyen, Julia Nagle, Christine A Lydon, Michael S Rabin, Kristen K McNiff, Belen Fraile, Joseph O Jacobson
PURPOSE: Increasing costs and medical complexity are significant challenges in modern oncology. We explored the use of clinical pathways to support clinical decision making and manage resources prospectively across our network. MATERIALS AND METHODS: We created customized lung cancer pathways and partnered with a commercial vendor to provide a Web-based platform for real-time decision support and post-treatment data aggregation. Dana-Farber Cancer Institute (DFCI) Pathways for non-small cell lung cancer (NSCLC) were introduced in January 2014...
March 4, 2017: Journal of Oncology Practice
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