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Douglas B Sponsler, Reed M Johnson
The role of pesticides in recent honey bee losses is controversial, partly because field studies often fail to detect effects predicted by laboratory studies. This dissonance highlights a critical gap in the field of honey bee toxicology: there exists little mechanistic understanding of the patterns and processes of exposure that link honey bees to pesticides in their environment. We submit that 2 key processes underlie honey bee pesticide exposure: (1) the acquisition of pesticide by foraging bees and (2) the in-hive distribution of pesticide returned by foragers...
October 21, 2016: Environmental Toxicology and Chemistry
Lisa K Fazio, Casey A Kennedy, Robert S Siegler
We examined whether playing a computerized fraction game, based on the integrated theory of numerical development and on the Common Core State Standards' suggestions for teaching fractions, would improve children's fraction magnitude understanding. Fourth and fifth-graders were given brief instruction about unit fractions and played Catch the Monster with Fractions, a game in which they estimated fraction locations on a number line and received feedback on the accuracy of their estimates. The intervention lasted less than 15 minutes...
2016: PloS One
Luke David Knibbs, Craig P Coorey, Matthew John Bechle, Christine Therese Cowie, Mila Dirgawati, Jane S Heyworth, Guy Barrington Marks, Julian D Marshall, Lidia Morawska, Gavin Pereira, Michael G Hewson
Including satellite observations of nitrogen dioxide (NO2) in land-use regression (LUR) models can improve their predictive ability, but requires rigorous evaluation. We used 123 passive NO2 samplers sited to capture within-city and near-road variability in two Australian cities (Sydney and Perth) to assess the validity of annual mean NO2¬ estimates from existing national satellite-based LUR models (developed with 68 regulatory monitors). The samplers spanned roadside, urban near traffic (≤100 m to a major road), and urban background (>100 m to a major road) locations...
October 21, 2016: Environmental Science & Technology
Anna J MacDonald, Stephen D Sarre
Taxon-specific DNA tests are applied to many ecological and management questions, increasingly using environmental DNA (eDNA). eDNA facilitates non-invasive ecological studies, but introduces additional risks of bias and error. For effective application, PCR primers must be developed for each taxon and validated in each system. We outline a nine step framework for the development and validation of taxon-specific primers for eDNA analysis in ecological studies, involving reference database construction, phylogenetic evaluation of the target gene, primer design, primer evaluation in silico, and laboratory evaluation of primer specificity, sensitivity, and utility...
October 21, 2016: Molecular Ecology Resources
Zhihui Yang, Fan Lin, Amanda S Weissman, Emily Jaalouk, Qing-Shan Xue, Kevin K W Wang
Despite the concussion/ mild traumatic brain injury (mTBI) being the most frequent occurrence of traumatic brain injury, there is still a lack of knowledge on the injury and its effects. To develop a better understanding of concussions, animals are often used because they provide a controlled, rigorous, and efficient model. Studies have adapted traditional animal models to perform mTBI to stimulate mild injury severity by changing the injury parameters. These models have been used because they can produce morphologically similar brain injuries to the clinical condition and provide a spectrum of injury severities...
October 12, 2016: Journal of Visualized Experiments: JoVE
Krisztina Janosko, Michael R Holbrook, Ricky Adams, Jason Barr, Laura Bollinger, Je T'aime Newton, Corrie Ntiforo, Linda Coe, Jiro Wada, Daniela Pusl, Peter B Jahrling, Jens H Kuhn, Matthew G Lackemeyer
Biosafety level 4 (BSL-4) suit laboratories are specifically designed to study high-consequence pathogens for which neither infection prophylaxes nor treatment options exist. The hallmarks of these laboratories are: custom-designed airtight doors, dedicated supply and exhaust airflow systems, a negative-pressure environment, and mandatory use of positive-pressure ("space") suits. The risk for laboratory specialists working with highly pathogenic agents is minimized through rigorous training and adherence to stringent safety protocols and standard operating procedures...
October 3, 2016: Journal of Visualized Experiments: JoVE
Giovanni Milito, Giorgio Lisi, Elena Aronadio, Michela Campanelli, Dario Venditti, Simona Grande, Michele Grande
BACKGROUNDS: Hemorrhoidectomy is considered the gold standard and the most effective and definitive treatment for grades 3 or 4 haemorrhoids, and Milligan-Morgan's and Ferguson's procedures are the most widely used techniques throughout the world. The aim of the study is to present our surgical technique using LigasureTM vessel sealing, focus on technical aspects and surgical tricks showing our results with a huge number of patients and a long-term follow-up. METHODS: Between June 2001 and June 2014 at the University Hospital of Tor Vergata, Rome, Italy, 1000 patients were selected to underwent LigaSureTM hemorrhoidectomy for III and IV degree haemorrhoids...
October 21, 2016: Minerva Gastroenterologica e Dietologica
Carson J Sandy, Samuel D Gosling, Shalom H Schwartz, Tim Koelkebeck
Values are a central personality construct and the importance of studying them has been well established. To encourage researchers to integrate measures of values into their studies, brief and ultrabrief instruments were developed to recapture the 10 values measured by the 40-item Portrait Values Questionnaire (PVQ; Schwartz, 2003 ). Rigorous psychometric procedures based on separate derivation (N = 38,049) and evaluation (N = 29,143) samples yielded 10- and 20-item measures of values, which proved to be successful at capturing the patterns and magnitude of correlations associated with the original PVQ...
October 21, 2016: Journal of Personality Assessment
J T Nielsen, A Guffanti, S Sarkar
The 'standard' model of cosmology is founded on the basis that the expansion rate of the universe is accelerating at present - as was inferred originally from the Hubble diagram of Type Ia supernovae. There exists now a much bigger database of supernovae so we can perform rigorous statistical tests to check whether these 'standardisable candles' indeed indicate cosmic acceleration. Taking account of the empirical procedure by which corrections are made to their absolute magnitudes to allow for the varying shape of the light curve and extinction by dust, we find, rather surprisingly, that the data are still quite consistent with a constant rate of expansion...
October 21, 2016: Scientific Reports
Wei Lv, Asegun Henry
Thermal conductivity is important for almost all applications involving heat transfer. The theory and modeling of crystalline materials is in some sense a solved problem, where one can now calculate their thermal conductivity from first principles using expressions based on the phonon gas model (PGM). However, modeling of amorphous materials still has many open questions, because the PGM itself becomes questionable when one cannot rigorously define the phonon velocities. In this report, we used our recently developed Green-Kubo modal analysis (GKMA) method to study amorphous silicon dioxide (a-SiO2)...
October 21, 2016: Scientific Reports
Ryan Eshleman, Rahul Singh
BACKGROUND: Adverse drug events (ADEs) constitute one of the leading causes of post-therapeutic death and their identification constitutes an important challenge of modern precision medicine. Unfortunately, the onset and effects of ADEs are often underreported complicating timely intervention. At over 500 million posts per day, Twitter is a commonly used social media platform. The ubiquity of day-to-day personal information exchange on Twitter makes it a promising target for data mining for ADE identification and intervention...
October 6, 2016: BMC Bioinformatics
M Bryant Howren, Jeffrey S Gonzalez
The current issue is devoted broadly to research on treatment adherence and chronic illness self-management behavior. As the prevalence of chronic illness increases, the pervasive problem of treatment nonadherence is increasingly viewed as having a major impact on treatment outcomes, public health and healthcare costs, making this issue particularly timely. Sixteen articles spanning an array of topics are presented; articles include empirical studies, statistical simulations, systematic reviews, and theoretical commentaries...
October 20, 2016: Journal of Behavioral Medicine
Erika E Atienzo, Susan K Baxter, Eva Kaltenthaler
OBJECTIVES: This review aims to summarise evidence on the effectiveness of interventions to prevent youth violence in Latin America. METHODS: A systematic search on 13 academic databases was conducted to locate studies evaluating a primary or secondary prevention intervention in Latin America. Studies could use any type of quantitative design to assess outcomes related to youth violence. A search of websites, references and citation searching was also carried out...
October 20, 2016: International Journal of Public Health
Ishita Mukherjee, Abhijit Chakraborty, Saikat Chakrabarti
BACKGROUND: An active immune surveillance and a range of barriers to infection allow the host to effectively eliminate microbial pathogens. However, pathogens may use diverse strategies to subdue such host defences. For instance, one such mechanism is the use of leucine-rich repeat (LRR) proteins by pathogens (microbial) to cause infection. In this study, we aimed at identifying novel virulence factor(s) in Leishmania donovani, based on the possibility of lateral gene transfers of bacterial virulence factor(s) to L...
October 21, 2016: Parasites & Vectors
William Severa, Ojas Parekh, Conrad D James, James B Aimone
The dentate gyrus forms a critical link between the entorhinal cortex and CA3 by providing a sparse version of the signal. Concurrent with this increase in sparsity, a widely accepted theory suggests the dentate gyrus performs pattern separation-similar inputs yield decorrelated outputs. Although an active region of study and theory, few logically rigorous arguments detail the dentate gyrus's (DG) coding. We suggest a theoretically tractable, combinatorial model for this action. The model provides formal methods for a highly redundant, arbitrarily sparse, and decorrelated output signal...
October 20, 2016: Neural Computation
Christopher Rowe, Eric Vittinghoff, Glenn-Milo Santos, Emily Behar, Caitlin Turner, Phillip Coffin
OBJECTIVES: Opioid overdose mortality has tripled in the USA since 2000 and opioids are responsible for more than half of all drug overdose deaths, which reached an all-time high in 2014. Opioid overdoses resulting in death, however, represent only a small fraction of all opioid overdose events and efforts to improve surveillance of this public health problem should include tracking nonfatal overdose events. International Classification of Disease (ICD) diagnosis codes, increasingly used for the surveillance of nonfatal drug overdose events, have not been rigorously assessed for validity in capturing overdose events...
October 20, 2016: Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine
Cynthia N Fuhrmann
PhD-trained biomedical scientists are moving into an increasingly diverse variety of careers within the sciences. However, our graduate and postdoctoral training programs have historically focused on academic career preparation, and have not sufficiently prepared trainees for transitioning into other scientific careers. Advocates for science have raised the concern that our collective disregard of the broader career development needs for predoctoral and postdoctoral trainees could drive talent away from science in upcoming generations...
October 20, 2016: Human Gene Therapy
Theodore Pincus
An MDHAQ/RAPID3 (multidimensional health assessment questionnaire/routine assessment of patient index data) was developed from the HAQ over 25 years, based on observations made from completion by every patient (with all diagnoses) at every routine rheumatology visit since 1980. Modification of the HAQ was viewed as similar to improving a laboratory test, with a primary focus on clinical value for diagnosis, prognosis, and/or management, as well as feasibility for minimal effect on clinical workflow. Rigorous attention, was also directed to validity, reliability, other methodologic and technological considerations, but after clinical value and feasibility were established...
September 2016: Clinical and Experimental Rheumatology
Simon Sawyer, Jan Coles, Angela Williams, Brett Williams
CONTEXT: Intimate partner violence (IPV) is a significant cause of morbidity and mortality in women worldwide. Numerous health organisations have called for increased education for health care practitioners who encounter IPV patients and the first clinical guidelines for health services responding to IPV were recently published. This renewed focus has created a need to examine the current evidence for IPV education so that it may inform the next generation of educational interventions...
November 2016: Medical Education
Katharina Bastl, Markus Berger, Karl-Christian Bergmann, Maximilian Kmenta, Uwe Berger
Pollen information as such is highly valuable and was considered so far as a self-evident good free for the public. The foundation for reliable and serious pollen information is the careful, scientific evaluation of pollen content in the air. However, it is essential to state and define now the requirements for pollen data and qualifications needed for institutions working with pollen data in the light of technical developments such as automated pollen counting and various political interests in aerobiology including attempts to finally acknowledge pollen and spores as relevant biological particles in the air worth being considered for pollution and health directives...
October 19, 2016: Wiener Klinische Wochenschrift
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