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Jian Wang, Radovan Krejci, Scott Giangrande, Chongai Kuang, Henrique M J Barbosa, Joel Brito, Samara Carbone, Xuguang Chi, Jennifer Comstock, Florian Ditas, Jost Lavric, Hanna E Manninen, Fan Mei, Daniel Moran-Zuloaga, Christopher Pöhlker, Mira L Pöhlker, Jorge Saturno, Beat Schmid, Rodrigo A F Souza, Stephen R Springston, Jason M Tomlinson, Tami Toto, David Walter, Daniela Wimmer, James N Smith, Markku Kulmala, Luiz A T Machado, Paulo Artaxo, Meinrat O Andreae, Tuukka Petäjä, Scot T Martin
The nucleation of atmospheric vapours is an important source of new aerosol particles that can subsequently grow to form cloud condensation nuclei in the atmosphere. Most field studies of atmospheric aerosols over continents are influenced by atmospheric vapours of anthropogenic origin (for example, ref. 2) and, in consequence, aerosol processes in pristine, terrestrial environments remain poorly understood. The Amazon rainforest is one of the few continental regions where aerosol particles and their precursors can be studied under near-natural conditions, but the origin of small aerosol particles that grow into cloud condensation nuclei in the Amazon boundary layer remains unclear...
October 24, 2016: Nature
Angela M Hong, Ricardo E Vilain, Sarah Romanes, Jean Yang, Elizabeth Smith, Deanna Jones, Richard A Scolyer, C Soon Lee, Mei Zhang, Barbara Rose
In this study, we examined PD-L1 expression by immunohistochemistry in 99 patients with tonsillar cancer and known human papillomavirus (HPV) status to assess its clinical significance. We showed that the pattern of PD-L1 expression is strongly related to HPV status. The PD-L1 positivity rate was 83.3% in HPV-positive cases and 56.9% in HPV-negative cases (p < 0.05). Patients with HPV-positive/PD-L1-positive cancer had significantly better event free survival and overall survival compared with patients with HPV-negative/PD-L1-negative cancer...
October 20, 2016: Oncotarget
Xiaobing Zhou, Hilda Smith, Ana Giraldo Silva, Jayne Belnap, Ferran Garcia-Pichel
N2 fixation and ammonia oxidation (AO) are the two most important processes in the nitrogen (N) cycle of biological soil crusts (BSCs). We studied the short-term response of acetylene reduction assay (ARA) rates, an indicator of potential N2 fixation, and AO rates to temperature (T, -5°C to 35°C) in BSC of different successional stages along the BSC ecological succession and geographic origin (hot Chihuahuan and cooler Great Basin deserts). ARA in all BSCs increased with T until saturation occurred between 15 and 20°C, and declined at 30-35°C...
2016: PloS One
Mary A M Cleaton, Claire L Dent, Mark Howard, Jennifer A Corish, Isabelle Gutteridge, Ulla Sovio, Francesca Gaccioli, Nozomi Takahashi, Steven R Bauer, D Steven Charnock-Jones, Theresa L Powell, Gordon C S Smith, Anne C Ferguson-Smith, Marika Charalambous
Pregnancy is a state of high metabolic demand. Fasting diverts metabolism to fatty acid oxidation, and the fasted response occurs much more rapidly in pregnant women than in non-pregnant women. The product of the imprinted DLK1 gene (delta-like homolog 1) is an endocrine signaling molecule that reaches a high concentration in the maternal circulation during late pregnancy. By using mouse models with deleted Dlk1, we show that the fetus is the source of maternal circulating DLK1. In the absence of fetally derived DLK1, the maternal fasting response is impaired...
October 24, 2016: Nature Genetics
Mandeep S Tamber, Dimitrios Nikas, Alexandra Beier, Lissa C Baird, David F Bauer, Susan Durham, Paul Klimo, Alexander Y Lin, Catherine Mazzola, Catherine McClung-Smith, Laura Mitchell, Rachana Tyagi, Ann Marie Flannery
BACKGROUND: No evidence-based guidelines exist on the role of cranial-molding orthosis (helmet) therapy for patients with positional plagiocephaly. OBJECTIVE: To address the clinical question: "Does helmet therapy provide effective treatment for positional plagiocephaly?" and to make treatment recommendations based on the available evidence. METHODS: The US National Library of Medicine Medline database and the Cochrane Library were queried by using MeSH headings and key words relevant to the objective of this systematic review...
November 2016: Neurosurgery
Lissa C Baird, Paul Klimo, Ann Marie Flannery, David F Bauer, Alexandra Beier, Susan Durham, Alexander Y Lin, Catherine McClung-Smith, Laura Mitchell, Dimitrios Nikas, Mandeep S Tamber, Rachana Tyagi, Catherine Mazzola
BACKGROUND: Evidence-based guidelines are not currently available for the treatment of positional plagiocephaly and, in particular, for the use of physical therapy for treatment. OBJECTIVE: To answer the question: "does physical therapy provide effective treatment for positional plagiocephaly?" Treatment recommendations are created based on the available evidence. METHODS: The PubMed and the Cochrane Library were queried using MeSH headings and key words relevant to the objective of this systematic review...
November 2016: Neurosurgery
Paul Klimo, Patrick Ryan Lingo, Lissa C Baird, David F Bauer, Alexandra Beier, Susan Durham, Alexander Y Lin, Catherine McClung-Smith, Laura Mitchell, Dimitrios Nikas, Mandeep S Tamber, Rachana Tyagi, Catherine Mazzola, Ann Marie Flannery
BACKGROUND: Plagiocephaly, involving positional deformity of the calvarium in infants, is one of the most common reasons for pediatric neurosurgical consultation. OBJECTIVE: To answer the question: "what is the evidence for the effectiveness of repositioning for positional plagiocephaly?" Treatment recommendations are provided based on the available evidence. METHODS: The National Library of Medicine MEDLINE database and the Cochrane Library were queried using MeSH headings and key words relevant to repositioning as a means to treat plagiocephaly and brachycephaly...
November 2016: Neurosurgery
Catherine Mazzola, Lissa C Baird, David F Bauer, Alexandra Beier, Susan Durham, Paul Klimo, Alexander Y Lin, Catherine McClung-Smith, Laura Mitchell, Dimitrios Nikas, Mandeep S Tamber, Rachana Tyagi, Ann Marie Flannery
BACKGROUND: No evidence-based guidelines exist for the imaging of patients with positional plagiocephaly. OBJECTIVE: The objective of this systematic review and evidence-based guideline is to answer the question, Is imaging necessary for infants with positional plagiocephaly to make a diagnosis? METHODS: The National Library of Medicine Medline database and the Cochrane Library were queried with the use of MeSH headings and key words relevant to imaging as a means to diagnose plagiocephaly...
November 2016: Neurosurgery
Cunlin Wang, Robert Kane, Mark Levenson, Jeffrey Kelman, Michael Wernecke, Joo-Yeon Lee, Steven Kozlowski, Carmen Dekmezian, Zhiwei Zhang, Aliza Thompson, Kimberly Smith, Yu-Te Wu, Yuqin Wei, Yoganand Chillarige, Qin Ryan, Chris Worrall, Thomas E MaCurdy, David J Graham
Importance: In 2011, the US Centers for Medicare & Medicaid Services (CMS) changed its reimbursement policy for hemodialysis to a bundled comprehensive payment system that included the cost of erythrocyte-stimulating agents (ESAs). Also in 2011, the US Food and Drug Administration revised the drug label for ESAs, recommending more conservative dosing in patients with chronic kidney disease. In response to concerns that these measures could have adverse effects on patient care and outcomes, the CMS and the FDA initiated a collaboration to assess the effect...
October 24, 2016: JAMA Internal Medicine
Hugh A Smith, Curtis A Nagle, Charles A MacVean, Cindy L McKenzie
Populations of Bemisa tabaci MEAM1 were established from nineteen locations in south Florida, primarily from commercial tomato fields, and were tested using a cotton leaf petiole systemic uptake method for susceptibility to the nicotinic acetylcholine agonist insecticides imidacloprid, thiamethoxam, dinotefuran and flupyradifurone. Eleven populations produced LC50s for one or more chemicals that were not significantly different from the susceptible laboratory colony based on overlapping fiducial limits, indicating some degree of susceptibility...
October 20, 2016: Insects
Md Akter Hussain, Alauddin Bhuiyan, Andrew Turpin, Chi D Luu, R Theodore Smith, Robyn H Guymer, Ramamohanarao Kotagiri
OBJECTIVE: We propose an effective, automatic method for identification of four retinal layer boundaries from the Spectral Domain Optical Coherence Tomography (SD-OCT) images in the presence and absence of pathologies and morphological changes due to disease. METHODS: The approach first finds an approximate location of three reference layers, and then uses these to bound the search space for the actual layers, which is achieved by modeling the problem as a graph and applying Dijkstra's shortest path algorithm...
October 19, 2016: IEEE Transactions on Bio-medical Engineering
Rafael Monge-Rojas, Tamara Fuster-Baraona, Carlos Garita-Arce, Marta Sánchez-López, Uriyoán Colon-Ramos, Vanessa Smith-Castro
BACKGROUND: In Latin America, more than 80% of adolescent girls are physically inactive. Inactivity may be reinforced by female stereotypes and objectification in the Latin American sociocultural context. METHODS: We examined the influence of objectification on the adoption of an active lifestyle among 192 adolescents (14 -17 y/old) from urban and rural areas in Costa Rica. Analyses of 48 focus-groups sessions were grounded in Objectification Theory. RESULTS: Vigorous exercises were gender-typed as masculine while girls had to maintain an aesthetic appearance at all times...
October 24, 2016: Journal of Physical Activity & Health
Ashley M Smith, Amanda Jensen-Doss
Improving mental health services for youth in usual care (UC) is one of the most critical issues in mental health services research. Identification of change groups in UC (e.g., recovery, improvement, no response, deterioration) can help researchers gain a richer understanding of UC and facilitate efforts to tailor UC to individuals who may not be responding well to treatment. This study used the reliable change index (RCI; Jacobson & Truax, 1991) to examine change groups within youth UC on two parent report outcome measures-symptom severity and functioning-using a large, naturalistic sample of youth (N = 672) treated in UC served at four clinics operating under a large county-wide public mental health authority...
October 24, 2016: Psychological Services
Rachael A Smith, Michael St J Warne, Kerrie Mengersen, Ryan D R Turner
Pollutant loads are widely used to set pollution reduction targets and assess regulatory compliance for the protection of receiving waterbodies. However, when a pollutant load is comprised of a mixture of chemicals, reducing the overall load (mass) will not necessarily reduce the toxicity by a similar amount. This can be overcome by setting targets based on toxicity-based loads (toxic loads), where the load is modified according to the relative toxicity (expressed as toxic equivalency factors- TEFs) of each toxicant...
October 24, 2016: Integrated Environmental Assessment and Management
Andrew David Smith, Stefania Musolino, James Taylor, Nicholas Westwood, Stephen Ojo
The non-enzymatic acylative kinetic resolution of challenging aryl-alkenyl (sp2 vs sp2) substituted secondary alcohols is described, with effective enantiodiscrimination achieved using the isothiourea organocatalyst HyperBTM (1 mol%) and isobutyric anhydride. The kinetic resolution of a wide range of aryl-alkenyl substituted alcohols has been evaluated, with either electron-rich or naphthyl aryl substituents in combination with an unsubstituted vinyl substituent providing the highest selectivity (S = 2-1980)...
October 24, 2016: Chemistry: a European Journal
Guillermo Cásedas, Francisco Les, Maria Pilar Gómez-Serranillos, Carine Smith, Víctor López
Sour cherry juice (Prunus cerasus) is consumed as a nutritional supplement claiming health effects. The aim of the study was to evaluate the different properties of sour cherry juice in terms of antioxidant activity and inhibition of target enzymes in the central nervous system and diabetes. The content of polyphenols and anthocyanins was quantified. Different experiments were carried out to determine the radical scavenging properties of the juice. The activity of sour cherry juice was also tested in physiological relevant enzymes of the central nervous system (acetylcholinesterase, monoamine oxidase A, tyrosinase) and others involved in type 2 diabetes (α-glucosidase, dipeptidyl peptidase-4)...
October 24, 2016: Food & Function
Jason Gandhi, Gautam Dagur, Kelly Warren, Noel Smith, Sardar Ali Khan
BACKGROUND: Diabetes mellitus is a vastly prevalent metabolic disorder with escalating global health concerns. Particularly when mismanaged, chronic micro- and macrovascular complications may highly impair physiological systems while immunodeficiency disposes us to infection. OBJECTIVE: We investigate infections, localized complications, and neoplasms of the genitourinary system secondary to the chronic complications of diabetes mellitus in males and females. METHOD: A comprehensive MEDLINE® search was guided using key words relevant to diabetes mellitus and the genitourinary system...
October 19, 2016: Current Diabetes Reviews
Kiri Choi, Lucian P Smith, J Kyle Medley, Herbert M Sauro
MOTIVATION: Model simulation exchange has been standardized with the Simulation Experiment Description Markup Language (SED-ML), but specialized software is needed to generate simulations in this format. Text-based languages allow researchers to create and modify experimental protocols quickly and easily, and export them to a common machine-readable format. RESULTS: phraSED-ML language allows modelers to use simple text commands to encode various elements of SED-ML (models, tasks, simulations, and results) in a format easy to read and modify...
September 30, 2016: Journal of Bioinformatics and Computational Biology
Paul S Myles, Julian A Smith, Andrew Forbes, Brendan Silbert, Mohandas Jayarajah, Thomas Painter, D James Cooper, Silvana Marasco, John McNeil, Jean S Bussières, Shay McGuinness, Kelly Byrne, Matthew T V Chan, Giovanni Landoni, Sophie Wallace
Background Tranexamic acid reduces the risk of bleeding among patients undergoing cardiac surgery, but it is unclear whether this leads to improved outcomes. Furthermore, there are concerns that tranexamic acid may have prothrombotic and proconvulsant effects. Methods In a trial with a 2-by-2 factorial design, we randomly assigned patients who were scheduled to undergo coronary-artery surgery and were at risk for perioperative complications to receive aspirin or placebo and tranexamic acid or placebo. The results of the tranexamic acid comparison are reported here...
October 23, 2016: New England Journal of Medicine
Samantha V Abram, Krista M Wisner, Jaclyn M Fox, Deanna M Barch, Lei Wang, John G Csernansky, Angus W MacDonald, Matthew J Smith
Impaired cognitive empathy is a core social cognitive deficit in schizophrenia associated with negative symptoms and social functioning. Cognitive empathy and negative symptoms have also been linked to medial prefrontal and temporal brain networks. While shared behavioral and neural underpinnings are suspected for cognitive empathy and negative symptoms, research is needed to test these hypotheses. In two studies, we evaluated whether resting-state functional connectivity between data-driven networks, or components (referred to as, inter-component connectivity), predicted cognitive empathy and experiential and expressive negative symptoms in schizophrenia subjects...
October 24, 2016: Human Brain Mapping
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