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https://www.readbyqxmd.com/read/29333772/-effect-of-different-surface-processes-on-the-bond-strength-between-zirconia-framework-and-veneering-ceramic
#1
Gong Qi, Sun Huiqiang, Hu Yijun, Chen Jia, Ding Weishan
OBJECTIVE: To compare the effect of different surface processes on bond strength and microscopic structure using a scanning electron microscope (SEM) and an energy distribution spectrum (EDS) at the bonding interface between zirconia framework and veneering ceramic. METHODS: WIELAND zirconia core material was cut into 33 rectangular specimens and fired on into rectangular specimens (10 mm×5 mm×5 mm). The specimens were randomly divided into three groups (n=
11)...
December 1, 2017: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/29332173/is-the-use-of-emergency-departments-socially-patterned
#2
Hélène Colineaux, Fanny Le Querrec, Laure Pourcel, Jean-Christophe Gallart, Olivier Azéma, Thierry Lang, Michelle Kelly-Irving, Sandrine Charpentier, Sébastien Lamy
OBJECTIVES: To analyse the association between patients' socioeconomic position (SEP) and the use of emergency departments (EDs). METHODS: This population-based study included all visits to ED in 2012 by inhabitants of the French Midi-Pyrénées region, recorded by the Regional Emergency Departments Observatory. We compared ED visit rates and the proportion of non-severe visits according to the patients' SEP as assessed by the European Deprivation Index. RESULTS: We analysed 496,388 visits...
January 13, 2018: International Journal of Public Health
https://www.readbyqxmd.com/read/29331898/coadsorption-and-subsequent-redox-conversion-behaviors-of-as-iii-and-cr-vi-on-al-containing-ferrihydrite
#3
Zecong Ding, Fenglian Fu, Dionysios D Dionysiou, Bing Tang
Naturally occurring ferrihydrite often contains various impurities, and Al is one of the most prominent impurities. However, little is known about how these impurities impact the physical and chemical properties of ferrihydrite with respect to metal(loid) adsorption. In this study, a series of Al-containing ferrihydrites were synthesized and exposed to a mixed solution containing As(III) and Cr(VI). The results showed that the two contaminants can be quickly adsorbed onto the surface of Al-containing ferrihydrite under acidic and neutral conditions...
January 11, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29331083/variation-in-reproductive-outcomes-of-women-with-histories-of-bulimia-nervosa-anorexia-nervosa-or-eating-disorder-not-otherwise-specified-relative-to-the-general-population-and-closest-aged-sisters
#4
Jennifer Tabler, Rebecca L Utz, Ken R Smith, Heidi A Hanson, Claudia Geist
OBJECTIVE: This study seeks to examine the long-term reproductive consequences of eating disorders (ED), to assess variation in reproductive outcomes by ED type, and to examine reproductive differences between women with previous ED diagnosis and their discordant sisters. METHOD: Using a sample of women with previous ED diagnosis generated by the Utah Population Database, this study compares the fecundity (parity) and age at first birth of women by ED subtype (bulimia nervosa [BN], anorexia nervosa [AN], and ED not otherwise specified [EDNOS]) (n = 1,579)...
January 13, 2018: International Journal of Eating Disorders
https://www.readbyqxmd.com/read/29330584/a-dedicated-neurologist-at-the-emergency-department-during-out-of-office-hours-decreases-patients-length-of-stay-and-admission-percentages
#5
M Christien van der Linden, Crispijn L van den Brand, Ido R van den Wijngaard, Roeline A Y de Beaufort, Naomi van der Linden, Korné Jellema
BACKGROUND: Emergency departments (EDs) worldwide face crowding, which hampers patient flow. In this study, the impact of a dedicated neurologist present at the ED on patient flow during out-of-office hours was assessed. METHODS: A cross-sectional, mixed methods study was undertaken at a Dutch ED, including a pre-post analysis of data of patients who had a primary neurological disease (n = 458) and staff surveys (n = 152). Descriptive statistics and content analysis were used for analyses...
January 12, 2018: Journal of Neurology
https://www.readbyqxmd.com/read/29329264/engineering-ru-pt-core-shell-catalysts-for-enhanced-electrochemical-oxygen-reduction-mass-activity-and-stability
#6
Ariel Jackson, Alaina Strickler, Drew Higgins, Thomas Francisco Jaramillo
Improving the performance of oxygen reduction reaction (ORR) electrocatalysts is essential for the commercial efficacy of many renewable energy technologies, including low temperature polymer electrolyte fuel cells (PEFCs). Herein, we report highly active and stable carbon-supported Ru@Pt core-shell nanoparticles (Ru@Pt/C) prepared by a wet chemical synthesis technique. Through rotating disc electrode testing, the Ru@Pt/C achieves an ORR Pt mass-based activity of 0.50 A mgPt-1 at 0.9 V versus the reversible hydrogen electrode (RHE), which exceeds the activity of the state-of-the-art commercial Pt/C catalyst as well as the Department of Energy 2020 PEFC electrocatalyst activity targets for transportation applications...
January 12, 2018: Nanomaterials
https://www.readbyqxmd.com/read/29329008/selective-formation-of-copper-nanoparticles-from-acid-mine-drainage-using-nanoscale-zerovalent-iron-particles
#7
R A Crane, D J Sapsford
Nanoscale zerovalent iron (nZVI) has been investigated for the selective formation of Cu nanoparticles from acid mine drainage (AMD) taken from a legacy mine site in the UK. Batch experiments were conducted containing unbuffered (pH 2.67 at t = 0) and pH buffered (pH < 3.1) AMD which were exposed to nZVI at 0.1-2.0 g/L. Results demonstrate that nZVI is selective for Cu, Cd and Al removal (>99.9% removal of all metals within 1 h when nZVI ≥ 1.0 g/L) from unbuffered AMD despite the coexistent of numerous other metals in the AMD, namely: Na, Ca, Mg, K, Mn and Zn...
December 18, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29328753/a-critical-analysis-of-the-perioperative-management-of-patients-with-ehlers-danlos-type-iv-vascular-syndrome
#8
Justyna Martin
This article discusses the perioperative care needs of patients with Ehlers Danlos type IV (vascular) syndrome. Ehlers Danlos syndrome (EDS) is a heritable group of connective tissue disorders characterised by varying degrees of tissue, blood vessel and internal organ fragility as well as skin and joint hypermobility (De Paepe and Malfait 2012).
September 2017: Journal of Perioperative Practice
https://www.readbyqxmd.com/read/29326039/a-descriptive-study-of-registered-nurses-application-of-the-triage-scale-retts%C3%A2-a-swedish-reliability-study
#9
Sara C Wireklint, Carina Elmqvist, Nicola Parenti, Katarina E Göransson
BACKGROUND: From a patient safety perspective, it is of great importance that decision support systems such as triage scales are evidence based. In the most recent national survey, the majority of Swedish Emergency Departments (EDs) apply the Swedish triage scale known as the Medical Emergency Triage Treatment Scale (METTS), subsequently renamed the Rapid Emergency Triage Treatment Scale (RETTS©). Despite national widespread implementation, there has been limited research on METTS/RETTS©...
January 8, 2018: International Emergency Nursing
https://www.readbyqxmd.com/read/29324875/effect-of-heat-input-on-microstructure-wear-and-friction-behavior-of-wt-50fecrc-20few-30feb-coating-on-aisi-1020-produced-by-using-pta-welding
#10
Cihan Özel, Turan Gürgenç
In this study, AISI 1020 steel surface was coated in different heat inputs with (wt.-%) 50FeCrC-20FeW-30FeB powder mixture by using plasma transferred arc (PTA) welding method. The microstructure of the coated samples were investigated by using optical microscope (OM), scanning electron microscope (SEM), X-ray diffraction (XRD) and energy dispersive X-ray (EDS). The hardness was measured with micro hardness test device. The dry sliding wear and friction coefficient properties were determined using a block-on-disk type wear test device...
2018: PloS One
https://www.readbyqxmd.com/read/29323390/bimetal-organic-frameworks-for-functionality-optimization-mnfe-mof-74-as-a-stable-and-efficient-catalyst-for-the-epoxidation-of-alkenes-with-h2o2
#11
Kuo Yuan, Tianqun Song, Dawei Wang, Ye Zou, Jinfeng Li, Xiaotao Zhang, Zhiyong Tang, Wenping Hu
In this work, we synthesized a series of microcrystalline MnxN100-x-MOF-74 (N = Fe, Co and Ni) materials by a one-pot reaction. Powder X-ray diffraction (PXRD) patterns of MnxN100-x-MOF-74 matched well with those of single-metal MOF-74, and the scanning electron microscopy (SEM) images exhibited homogeneous nanocrystallites aggregated together. The amounts and dispersion of metals were analyzed by using inductively coupled plasma (ICP) and energy-dispersive X-ray spectroscopy (EDS), separately. MnxN100-x-MOF-74 could remain crystalline and efficiently catalyze the epoxidation of alkenes in DMF with NaHCO3 and 30% H2O2...
January 11, 2018: Nanoscale
https://www.readbyqxmd.com/read/29321010/evaluation-of-five-cad-cam-materials-by-microstructural-characterization-and-mechanical-tests-a-comparative-in-vitro-study
#12
Nesrin Sonmez, Pinar Gultekin, Volkan Turp, Gokhan Akgungor, Deniz Sen, Eitan Mijiritsky
BACKGROUND: Polymer infiltrated ceramics and nano-ceramic resins are the new restorative materials which have been developed in order to enhance the adverse properties of glass-matrix ceramics and resin composites. The aim of the present in vitro study was to evaluate the characteristics of various CAD/CAM materials through mechanical, microstructural, and SEM analysis. METHODS: Five test groups (n = 22) were formed by using the indicated CAD/CAM blocks: VITA Enamic (VITA Zahnfabrik), Lava Ultimate (3 M ESPE), IPS e...
January 8, 2018: BMC Oral Health
https://www.readbyqxmd.com/read/29318583/geriatric-emergency-department-innovations-transitional-care-nurses-and-hospital-use
#13
Ula Hwang, Scott M Dresden, Mark S Rosenberg, Melissa M Garrido, George Loo, Jeremy Sze, Stephanie Gravenor, D Mark Courtney, Raymond Kang, Carolyn W Zhu, Carmen Vargas-Torres, Corita R Grudzen, Lynne D Richardson
OBJECTIVES: To examine the effect of an emergency department (ED)-based transitional care nurse (TCN) on hospital use. DESIGN: Prospective observational cohort. SETTING: Three U.S. (NY, IL, NJ) EDs from January 1, 2013, to June 30, 2015. PARTICIPANTS: Individuals aged 65 and older in the ED (N = 57,287). INTERVENTION: The intervention was first TCN contact. Controls never saw a TCN during the study period...
January 10, 2018: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/29318487/dpf-soot-as-an-adsorbent-for-cu-ii-cd-ii-and-cr-vi-compared-with-commercial-activated-carbon
#14
Kun Yang, John Fox
The use of carbon soot recovered from diesel particulate filters (DPF) has been investigated as a potential adsorbent for heavy metals including cadmium, chromium, and copper from wastewater. Results were compared with the adsorption performance of powder activated carbon (PAC). The uptake capacity of heavy metals for soot was found to be higher than PAC. And the thermodynamic study result for both soot and PAC indicated the adsorption procedures are exothermic. The adsorption studies were carried out for both single and binary systems...
January 9, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29317397/factors-associated-with-availability-of-anticoagulation-reversal-agents-in-rural-and-community-emergency-departments
#15
Brett A Faine, Julie Amendola, Jordan Homan, Azeemuddin Ahmed, Nicholas Mohr
PURPOSE: Results of a study of anticoagulation reversal agent availability in rural and community hospital emergency departments (EDs) are reported. METHODS: A cross-sectional telephone survey was conducted to test the hypothesis that anticoagulation reversal agents are not commonly stocked in low-volume EDs. In phase 1 of the study, a physician, pharmacist, or nurse manager at a sample of EDs in 1 state was surveyed to characterize anticoagulation reversal agent availability and the presence or absence of reversal protocols; in phase 2, follow-up qualitative interviews were conducted with hospital pharmacists selected by purposive sampling to identify barriers to availability...
January 15, 2018: American Journal of Health-system Pharmacy: AJHP
https://www.readbyqxmd.com/read/29316463/electrochemical-and-microbial-community-responses-of-electrochemically-active-biofilms-to-copper-ions-in-bioelectrochemical-systems
#16
Yaping Zhang, Guanqun Li, Jing Wen, Yangao Xu, Jian Sun, Xun-An Ning, Xingwen Lu, Yujie Wang, Zuoyi Yang, Yong Yuan
Heavy metals play an important role in the conductivity of solution, power generation and activity of microorganisms in bioelectrochemical systems (BESs). However, effect of heavy metal on the process of exoelectrogenesis metabolism and extracellular electron transfer of electrochemically active biofilms (EABs) was poorly understood. Herein, we investigated the impact of Cu2+ at gradually increasing concentration on the morphological and electrochemical performance and bacterial communities of anodic biofilms in mixed-culture BESs...
January 5, 2018: Chemosphere
https://www.readbyqxmd.com/read/29314439/low-incidence-of-factor-viii-inhibitors-in-previously-untreated-patients-with-severe-haemophilia-a-treated-with-octanate%C3%A2-final-report-from-a-prospective-study
#17
A Klukowska, V Komrska, V Vdovin, A Pavlova, M Jansen, S Lowndes, L Belyanskaya, O Walter, P Laguna
INTRODUCTION: Octanate® is a human, plasma-derived, von Willebrand factor-stabilized coagulation factor VIII (FVIII) concentrate with demonstrated haemostatic efficacy in previously treated patients with haemophilia A. AIM: This prospective, open-label study aimed to assess the immunogenicity of octanate® in previously untreated patients (PUPs). METHODS: The study monitored development of FVIII inhibitors in 51 PUPs. Tolerability, viral safety, FVIII recovery and efficacy of octanate® for the prevention and treatment of bleeds and in surgical procedures were also assessed...
January 3, 2018: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/29313428/biosynthesis-of-silver-nanoparticles-using-novel-bacillus-sp-sbt8
#18
Tuğçe Yurtluk, Fikriye Alev Akçay, Ayşe Avcı
Biosynthesis of silver nanoparticles (AgNPs) using microorganisms is an important application of nano-biotechnology and green chemistry because of interest by pharmaceutical and food manufacturers. In this study, biosynthesis of AgNPs by a novel Bacillus strain isolated from a soil sample from Sakarya district in Turkey was investigated. Biosynthesis was performed using cell-free supernatant of the bacterium following 24 h growth. Effects of varying AgNO3 concentration (1-10 mM), pH (5-10), and temperature (30-40°C) on the synthesis of AgNPs were determined...
January 9, 2018: Preparative Biochemistry & Biotechnology
https://www.readbyqxmd.com/read/29313330/metallopolymer-based-block-copolymers-for-the-preparation-of-porous-and-redox-responsive-materials
#19
Christian Rüttiger, Hanna Huebner, Sebastian Schöttner, Tamara Winter, Gennady Cherkashinin, Bjorn Kuttich, Bernd Stuehn, Markus Gallei
Metallopolymers are a unique class of functional materials because of their redox-mediated optoelectronic and catalytic switching capabilities and - as recently shown - their outstanding structure formation and separation capabilities. Within the present study, (tri)block copolymers of poly(isoprene) (PI) and poly(ferrocenylmethyl methacrylate) (PFMMA) having different block compositions and overall molar masses up to 328 kg mol-1 are synthesized by anionic polymerization. The composition and thermal properties of the metallopolymers are investigated by state of the art polymer analytical methods comprising size exclusion chromatography (SEC), 1H NMR spectroscopy, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA)...
January 9, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29311433/local-viscoelastic-response-of-direct-and-indirect-dental-restorative-composites-measured-by-afm
#20
Laura Grattarola, Giacomo Derchi, Alberto Diaspro, Carla Gambaro, Marco Salerno
We investigated the viscoelastic response of direct and indirect dental restorative composites by the novel technique of AM-FM atomic force microscopy. We selected four composites for direct restorations (Adonis, Optifil, EPH, CME) and three composites for indirect restorations (Gradia, Estenia, Signum). Scanning electron microscopy with micro-analysis was also used to support the results. The mean storage modulus of all composites was in the range of 10.2-15.2 GPa. EPH was the stiffest (p<0.05 vs. all other composites but Adonis and Estenia), while no significant difference was observed between direct and indirect group (p≥0...
December 31, 2017: Dental Materials Journal
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