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https://www.readbyqxmd.com/read/28643834/understanding-the-remarkable-luminescence-enhancement-via-sio2-coating-on-tio2-eu-3-nanofibers
#1
Meiqi Chang, Yanhua Song, Ye Sheng, Jie Chen, Haifeng Zou
TiO2:Eu(3+) nanofibers diameters can be tuned by changing the mixed solvent ratio are synthesized via the electrospinning technique. Concentration quenching phenomena and the relationship of the PL intensity ratio I((5)D0-(7)F2)/I((5)D0-(7)F1) with the Eu doping concentration are discussed. Notably, the luminescence intensity is enhanced by about 7.8 fold by coating SiO2 gel layer on the TiO2:Eu(3+) nanofibers, which is successfully performed via a sol-gel process followed by calcination. Furthermore, these fibers are characterized systematically via X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectroscopy (UV-vis DRS), Fourier transform infrared spectroscopy (FT-IR), and photoluminescence (PL) spectroscopy...
June 23, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28642182/the-effect-of-morbid-obesity-on-subarachnoid-hemorrhage-prognosis-in-the-united-states
#2
Ross-Jordon S Elliott, Daniel Agustin Godoy, Joel E Michalek, Réza Behrouz, Marwah A Elsehety, Shaheryar Hafeez, Denise Rios, Ali Seifi
BACKGROUND: The association between obesity and non-traumatic subarachnoid hemorrhage (SAH) patient outcome is unclear. AIMS: Determine the impact of morbid obesity (body mass index ≥40 kg/m(2)) on non-traumatic SAH outcomes. METHODS: Using the Nationwide Inpatient Sample, we identified hospitalized, non-traumatic SAH patients diagnosed from 2008 to 2013 and tested the effect of obesity on their mortality and clinical outcomes. Odds ratios were estimated with a mixed effects linear logistic model with adjustment for hospital clustering...
June 19, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28641909/effect-of-the-affordable-care-act-medicaid-expansion-on-emergency-department-visits-evidence-from-state-level-emergency-department-databases
#3
Sayeh Nikpay, Seth Freedman, Helen Levy, Tom Buchmueller
STUDY OBJECTIVE: We assess whether the expansion of Medicaid under the Patient Protection and Affordable Care Act (ACA) results in changes in emergency department (ED) visits or ED payer mix. We also test whether the size of the change in ED visits depends on the change in the size of the Medicaid population. METHODS: Using all-capture, longitudinal, state data from the Agency for Healthcare Research and Quality's Fast Stats program, we implemented a difference-in-difference analysis, which compared changes in ED visits per capita and the share of ED visits by payer (Medicaid, uninsured, and private insurance) in 14 states that did and 11 states that did not expand Medicaid in 2014...
June 11, 2017: Annals of Emergency Medicine
https://www.readbyqxmd.com/read/28641671/occurrence-of-aerobic-and-anaerobic-bacteria-in-the-consumer-end-of-a-water-distribution-system
#4
Süleyman Hoca, Miray Üstüntürk-Onan, Esra Ilhan-Sungur
  In this study, mixed species biofilm formation including sulphate-reducing bacteria (SRB) on polypropylene surface and bacteriology of network water were investigated in a model water distribution system during a nine-month period. Water and biofilm samples were analyzed for the enumeration of aerobic heterotrophic bacteria (AHB), anaerobic heterotrophic bacteria (ANHB) and SRB. The number of live/dead bacteria was also analyzed by epifluorescence microscopy. In addition, extracellular polysaccharide substances (EPS) extraction, carbohydrate analysis and scanning electron microscope observation were performed...
July 1, 2017: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/28641548/pediatric-cutaneous-graft-versus-host-disease-a-review
#5
Vinod E Nambudiri, Connie R Shi, Jennifer T Huang
BACKGROUND: Graft versus host disease (GVHD) is a significant complication following hematopoietic stem cell transplantation in the pediatric population. The most common clinical manifestation of GVHD is in the skin. This article will present a review of key concepts related to pediatric cutaneous GVHD, including pathophysiology, clinical epidemiology, diagnosis, and treatment options. GVHD is an immune-mediated process characterized by an inflammatory immune response in acute GVHD and mixed inflammatory and fibrotic states in chronic GVHD...
June 14, 2017: Current Pediatric Reviews
https://www.readbyqxmd.com/read/28641413/cation-dynamics-in-mixed-cation-ma-x-fa-1-xpbi3-hybrid-perovskites-from-solid-state-nmr
#6
Dominik Kubicki, Daniel Prochowicz, Albert Hofstetter, Peter Pechy, Shaik M Zakeeruddin, Michael Grätzel, Lyndon Emsley
Mixed cation organic lead halide perovskites attract unfaltering attention owing to their excellent photovoltaic properties. Currently, the best performing perovskite materials contains multiple cations and provide power conversion efficiencies up to around 22%. Here, we report the first quantitative, cation-specific data on cation reorientation dynamics in hybrid mixed-cation formamidinium (FA)/methylammonium (MA) lead halide perovskites. We use 14N, 2H, 13C and 1H solid-state MAS NMR to elucidate cation reorientation dynamics, microscopic phase composition, and the MA/FA ratio, in (MA)x(FA)1-xPbI3 between 100 and 330 K...
June 23, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28640686/prevalence-of-financial-fraud-and-scams-among-older-adults-in-the-united-states-a-systematic-review-and-meta-analysis
#7
David Burnes, Charles R Henderson, Christine Sheppard, Rebecca Zhao, Karl Pillemer, Mark S Lachs
BACKGROUND: The financial exploitation of older adults was recently recognized by the Centers for Disease Control and Prevention as a serious public health problem. Knowledge of the prevalence of elder financial exploitation is mostly limited to the category of financial abuse, which occurs in relationships involving an expectation of trust. Little is known about the other major category of elder financial exploitation-elder financial fraud and scams, which is perpetrated by strangers...
June 22, 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/28640510/paediatric-intensive-care-nurses-decision-making-around-gastric-residual-volume-measurement
#8
Lyvonne N Tume, Lynne Latten, Lindsay Kenworthy
BACKGROUND: Measuring gastric residual volume (GRV) to guide enteral feeding is a common nursing practice in intensive care units, yet little evidence supports this practice. In addition, this practice has been shown to potentially contribute to inadequate energy delivery in intensive care, which remains a problem in critically ill children. AIMS: We aimed to explore paediatric intensive care nurses' decision-making surrounding this practice. METHODS: This is a cross-sectional electronic survey in a single mixed general and cardiac surgical PICU in the UK...
June 22, 2017: Nursing in Critical Care
https://www.readbyqxmd.com/read/28639808/a-quarter-century-of-advances-in-the-statistical-analysis-of-longitudinal-neuropsychological-data
#9
John L Woodard
OBJECTIVE: Over the last 25 years, there has been an unprecedented increase in federal funding for large-scale longitudinal studies, many of which collect neuropsychological or neuroimaging outcome measures. These studies have collected data from thousands of study participants across multiple waves of data collection over many years. With the increased availability of longitudinal data, data sharing policies have become more liberal, thereby offering significant opportunities for interested researchers to carry out their own longitudinal research with these data...
June 22, 2017: Neuropsychology
https://www.readbyqxmd.com/read/28639678/nitrogen-doped-graphene-anchored-with-mixed-growth-patterns-of-cupt-alloy-nanoparticles-as-a-highly-efficient-and-durable-electrocatalyst-for-the-oxygen-reduction-reaction-in-an-alkaline-medium
#10
Rajith Illathvalappil, Vishal M Dhavale, Siddheshwar N Bhange, Sreekumar Kurungot
A highly active and durable CuPt alloy catalyst with trigonal bipyramidal and truncated cube-type mixed morphologies, anchored on the nitrogen-doped graphene (NGr) surface (CuPt-TBTC/NGr), was prepared by a simple and fast method. The obtained CuPt alloy showed improved oxygen reduction reaction (ORR) activity, with a 30 mV positive shift in the half-wave potential value, as compared to the state-of-the-art Pt/C catalyst in a 0.1 M KOH solution. The CuPt alloy with the trigonal bipyramidal morphology possesses porous type inter-connected sides, which help to achieve improved mass transport of oxygen during the ORR...
June 22, 2017: Nanoscale
https://www.readbyqxmd.com/read/28637857/acute-peaks-of-testosterone-suppress-paternal-care-evidence-from-individual-hormonal-reaction-norms
#11
Wolfgang Goymann, Pamela Flores Dávila
A long-standing tenet of evolutionary endocrinology states that testosterone mediates the life-history trade-off between mating and paternal care. However, the support for a role of testosterone in suppressing paternal care is mixed: implantation studies in birds suggest that high-level testosterone implants suppress paternal care, but circulating levels of testosterone and paternal care are typically not correlated. Because any trade-off in real life must be realized with hormone levels that are within an individual's reaction norm, it is crucial to show that natural changes in the hormone can modulate behaviour...
June 28, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28637479/pediatric-emental-healthcare-technologies-a-systematic-review-of-implementation-foci-in-research-studies-and-government-and-organizational-documents
#12
REVIEW
Nicole D Gehring, Patrick McGrath, Lori Wozney, Amir Soleimani, Kathryn Bennett, Lisa Hartling, Anna Huguet, Michele P Dyson, Amanda S Newton
BACKGROUND: Researchers, healthcare planners, and policymakers convey a sense of urgency in using eMental healthcare technologies to improve pediatric mental healthcare availability and access. Yet, different stakeholders may focus on different aspects of implementation. We conducted a systematic review to identify implementation foci in research studies and government/organizational documents for eMental healthcare technologies for pediatric mental healthcare. METHODS: A search of eleven electronic databases and grey literature was conducted...
June 21, 2017: Implementation Science: IS
https://www.readbyqxmd.com/read/28636388/correlation-between-photoluminescence-and-carrier-transport-and-a-simple-in-situ-passivation-method-for-high-bandgap-hybrid-perovskites
#13
Ryan J Stoddard, Felix T Eickemeyer, John K Katahara, Hugh W Hillhouse
High bandgap mixed-halide hybrid perovskites have higher open-circuit voltage deficits and lower carrier diffusion lengths than their lower-bandgap counterparts. We have developed a Ligand-Assisted Crystallization (LAC) technique that introduces additives in-situ during the solvent wash and developed a new method to dynamically measure the absolute-intensity steady-state photoluminescence and the mean carrier diffusion length simultaneously. The measurements reveal four distinct regimes of material changes and show that photoluminescence brightening often coincides with losses in carrier transport, such as in degradation or phase segregation...
June 21, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28636359/relativistic-approximations-to-paramagnetic-nmr-chemical-shift-and-shielding-anisotropy-in-transition-metal-systems
#14
Syed Awais Rouf, Jiří Mareš, Juha Vaara
We apply approximate relativistic methods to calculate the magnetic property tensors, i.e., the g-tensor, zero-field splitting (ZFS) tensor (D), and hyperfine coupling (HFC) tensors, for the purpose of constructing paramagnetic nuclear magnetic resonance (pNMR) shielding tensors. The chemical shift and shielding anisotropy are calculated by applying a modern implementation of the classic Kurland-McGarvey theory (J. Magn. Reson. 1970, 2, 286), which formulates the shielding tensor in terms of the g- and HFC tensors obtained for the ground multiplet, in the case of higher than doublet multiplicity defined by the ZFS interaction...
June 21, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28635273/a-direct-bandgap-copper-antimony-halide-perovskite
#15
Brenda Vargas, Estrella Ramos, Enrique Pérez-Gutiérrez, Juan C Alonso, Diego Solis-Ibarra
Since the establishment of perovskite solar cells (PSCs) there has been an intense search for alternative materials to replace lead and improve their stability towards moisture and light. As single-metal perovskite structures have yielded unsatisfactory performances, an alternative is the use of double perovskites that incorporate a combination of metals. To this day, only a handful of these compounds have been synthesized, but most of them have indirect bandgaps and/or do not have bandgaps energies well-suited for photovoltaic applications...
June 21, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28634748/exposure-response-relationship-of-ramucirumab-in-east-asian-patients-from-rainbow-a-randomized-clinical-trial-in-second-line-treatment-of-gastric-cancer
#16
Tae You Kim, Chia-Jui Yen, Salah-Eddin Al-Batran, David Ferry, Ling Gao, Yanzhi Hsu, Rebecca Cheng, Mauro Orlando, Atsushi Ohtsu
BACKGROUND: Ramucirumab is a recombinant human IgG1 neutralizing monoclonal antibody specific for vascular endothelial growth factor receptor-2. Second-line ramucirumab, in conjunction with paclitaxel (ramucirumab 8 mg/kg or placebo in combination with 80 mg/m(2) paclitaxel), has been shown to be effective and safe in patients with advanced gastric or gastroesophageal junction (GEJ) adenocarcinoma in RAINBOW, a global phase III randomized clinical trial. We conducted an exploratory exposure-response analysis of efficacy and safety of ramucirumab in East Asian patients from the RAINBOW trial...
June 20, 2017: Gastric Cancer
https://www.readbyqxmd.com/read/28634548/decline-in-memory-visuospatial-ability-and-crystalized-cognitive-abilities-in-older-adults-normative-aging-or-terminal-decline
#17
R Bendayan, A M Piccinin, S M Hofer, D Cadar, B Johansson, G Muniz-Terrera
The aim of this study is to explore the pattern of change in multiple measures of cognitive abilities in a sample of oldest-old adults, comparing two different time metrics (chronological age and time to death) and therefore examining both underlying conceptual assumptions (age-related change and terminal decline). Moreover, the association with individual characteristics as sex, education, and dementia diagnosis was also examined. Measures of cognitive status (Mini-Mental State Examination and the Swedish Clock Test) and tests of crystallized (knowledge and synonyms), memory (verbal memory, nonverbal long-term memory, recognition and correspondence, and short-term memory), and visuospatial ability were included...
2017: Journal of Aging Research
https://www.readbyqxmd.com/read/28633638/evaluating-the-impact-of-prescription-drug-monitoring-program-implementation-a-scoping-review
#18
Erin P Finley, Ashley Garcia, Kristen Rosen, Don McGeary, Mary Jo Pugh, Jennifer Sharpe Potter
BACKGROUND: Prescription drug monitoring programs (PDMPs) have been implemented in 49 out of 50 states in an effort to reduce opioid-related misuse, abuse, and mortality, yet the literature evaluating the impact of PDMP implementation remains limited. We conducted a scoping review to: (1) describe available evidence regarding impact of PDMPs in the U.S.; and (2) propose a conceptual model to inform future PDMP implementation and evaluation efforts. METHODS: Scoping systematic review following Arksey and O'Malley's (2005) methodology...
June 20, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/28633604/a-two-stage-approach-to-the-joint-analysis-of-longitudinal-and-survival-data-utilising-the-coxian-phase-type-distribution
#19
Conor Donnelly, Lisa M McFetridge, Adele H Marshall, Hannah J Mitchell
The Coxian phase-type distribution is a special type of Markov model which can be utilised both to uncover underlying stages of a survival process and to make inferences regarding the rates of flow of individuals through these latent stages before an event of interest occurs. Such models can be utilised, for example, to identify individuals who are likely to deteriorate faster through a series of disease states and thus require more aggressive medical intervention. Within this paper, a two-stage approach to the analysis of longitudinal and survival data is presented...
January 1, 2017: Statistical Methods in Medical Research
https://www.readbyqxmd.com/read/28632873/screening-for-obesity-and-intervention-for-weight-management-in-children-and-adolescents-evidence-report-and-systematic-review-for-the-us-preventive-services-task-force
#20
Elizabeth A O'Connor, Corinne V Evans, Brittany U Burda, Emily S Walsh, Michelle Eder, Paula Lozano
Importance: Obesity is common in children and adolescents in the United States, is associated with negative health effects, and increases the likelihood of obesity in adulthood. Objective: To systematically review the benefits and harms of screening and treatment for obesity and overweight in children and adolescents to inform the US Preventive Services Task Force. Data Sources: MEDLINE, PubMed, PsycINFO, Cochrane Collaboration Registry of Controlled Trials, and the Education Resources Information Center through January 22, 2016; references of relevant publications; government websites...
June 20, 2017: JAMA: the Journal of the American Medical Association
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