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Heat related emergencies

Émélie Laverdière, Hélène Payette, Pierrette Gaudreau, José A Morais, Bryna Shatenstein, Mélissa Généreux
OBJECTIVES: Extreme heat is known to increase heat-related health outcomes (HRHO). Incidence and predictors of HRHO were examined among older adults living in Quebec (Canada). METHOD: This prospective five-year study used data from the first follow-up of community-dwelling older adults from the NuAge cohort (2005-2006), located in three health regions of Southern Quebec. Medical, social and environmental factors, identified in Health Canada guidelines (2011), were used to develop the Older Adult Health Vulnerability Index (OAHVI)...
October 20, 2016: Canadian Journal of Public Health. Revue Canadienne de Santé Publique
Dhananjai Saranadhi, Dayong Chen, Justin A Kleingartner, Siddarth Srinivasan, Robert E Cohen, Gareth H McKinley
Skin friction drag contributes a major portion of the total drag for small and large water vehicles at high Reynolds number (Re). One emerging approach to reducing drag is to use superhydrophobic surfaces to promote slip boundary conditions. However, the air layer or "plastron" trapped on submerged superhydrophobic surfaces often diminishes quickly under hydrostatic pressure and/or turbulent pressure fluctuations. We use active heating on a superhydrophobic surface to establish a stable vapor layer or "Leidenfrost" state at a relatively low superheat temperature...
October 2016: Science Advances
Min Woo Lee, Rira Seo, Yu Jeong Lee, Ju Hye Bae, Jung-Kwon Park, Joung-Hahn Yoon, Jei Wan Lee, Ho Won Jung
An Arabidopsis thaliana ALTERED MERISTEM PROGRAM1 (AtAMP1), which encodes a putative glutamate carboxypeptidase, not only controls shoot apical meristem development, but also is involved in tolerance response to abiotic stresses. Here, we introduce a novel mutant; named amp1-32 that is a phenocopier to previously isolated different amp1 mutant alleles. Interestingly, tiny leaves were continuously developed at the bottom of pre-emerged leaves in the amp1-32. The amp1-32 mutant was less sensitive to heat shock treatment lasting for 3 h, whereas disease symptoms were severely developed in the mutant after Pseudomonas syringae infection...
October 12, 2016: Biochemical and Biophysical Research Communications
Zeeshan Khan, Rehan Ali Shah, Saeed Islam, Bilal Jan, Muhammad Imran, Farisa Tahir
Modern optical fibers require double-layer coating on the glass fiber to provide protection from signal attenuation and mechanical damage. The most important plastic resins used in wires and optical fibers are plastic polyvinyl chloride (PVC) and low-high density polyethylene (LDPE/HDPE), nylon and Polysulfone. In this paper, double-layer optical fiber coating is performed using melt polymer satisfying PTT fluid model in a pressure type die using wet-on-wet coating process. The assumption of fully developed flow of Phan-Thien-Tanner (PTT) fluid model, two-layer liquid flows of an immiscible fluid is modeled in an annular die, where the fiber is dragged at a higher speed...
October 6, 2016: Scientific Reports
Leila Heidari, Andrea Winquist, Mitchel Klein, Cassandra O'Lenick, Andrew Grundstein, Stefanie Ebelt Sarnat
Identification of populations susceptible to heat effects is critical for targeted prevention and more accurate risk assessment. Fluid and electrolyte imbalance (FEI) may provide an objective indicator of heat morbidity. Data on daily ambient temperature and FEI emergency department (ED) visits were collected in Atlanta, Georgia, USA during 1993-2012. Associations of warm-season same-day temperatures and FEI ED visits were estimated using Poisson generalized linear models. Analyses explored associations between FEI ED visits and various temperature metrics (maximum, minimum, average, and diurnal change in ambient temperature, apparent temperature, and heat index) modeled using linear, quadratic, and cubic terms to allow for non-linear associations...
October 2, 2016: International Journal of Environmental Research and Public Health
Mohamed Taha Khoufi, Ali Mrabet, Abderraouf Ben Mansour, Khaled Lamine, Mustapha Ferjani, Mondher Yedeas
Exertional heat stroke is defined as hyperthermia associated with neurological signs related to intense physical activity performed in a hot environment. This is a medical emergency and life-threatening. In this study, we investigated four cases of exertional heat stroke hospitalized at the military hospital in Tunis (Tunisia) to describe the clinical, therapeutic and preventive characteristics and factors favoring this disease. Four young soldiers, 23 to 44 years older, have developed Exertional heat stroke after Intense and prolonged exercise...
April 2016: La Tunisie Médicale
Enrico Marchetti, Pasquale Capone, Daniela Freda
INTRODUCTION: Climate change is a global emergency that influences human health and occupational safety. Global warming characterized by an increase in temperature of the ambience and humidity affects human health directly impairing body thermoregulation with serious consequences: dehydration, fatigue, heat stroke and even death. Several studies have demonstrated negative effects of climate change on working populations in a wide variety of workplaces with particular regard to outdoor and uncooled indoor workplaces...
July 2016: Annali Dell'Istituto Superiore di Sanità
N C Voermans, M Snoeck, H Jungbluth
Mutations in the skeletal muscle ryanodine receptor (RYR1) gene are associated with a wide spectrum of inherited myopathies presenting throughout life. Malignant hyperthermia susceptibility (MHS)-related RYR1 mutations have emerged as a common cause of exertional rhabdomyolysis, accounting for up to 30% of rhabdomyolysis episodes in otherwise healthy individuals. Common triggers are exercise and heat and, less frequently, viral infections, alcohol and drugs. Most subjects are normally strong and have no personal or family history of malignant hyperthermia...
October 2016: Revue Neurologique
Shuo Dong, Sougata Pal, Jie Lian, Yinthai Chan, Oleg V Prezhdo, Zhi-Heng Loh
Quasi-two-dimensional colloidal nanoplatelets (NPLs) have recently emerged as a class of semiconductor nanomaterials whose monodisperse thicknesses of atomic precision give rise to narrow absorption and emission spectra. However, the sub-picosecond carrier dynamics of NPLs at the band edge remain largely unknown, despite their importance in determining the optoelectronic properties of these materials. Here, we use a combination of femtosecond transient absorption spectroscopy and nonadiabatic molecular dynamics simulations to investigate the early-time carrier dynamics of CdSe/CdS core/shell NPLs...
September 17, 2016: ACS Nano
J G Sereni, M Giovannini, M Gómez Berisso, F Gastaldo
Low temperature thermal and magnetic measurements performed on ferro-magneticl (FM) alloys of composition Ce2.15(Pd1-x Ag x )1.95In0.9 are presented. Pd substitution by Ag depresses [Formula: see text] from 4.1 K down to 1.1 K for x  =  0.5, which is related to the increase of band electrons, with a critical concentration extrapolated to [Formula: see text]. The [Formula: see text] decrease is accompanied by a weakening of the magnetization of the FM phase. At high temperature (T  >  30 K) the inverse magnetic susceptibility reveals the presence of robust magnetic moments ([Formula: see text] [Formula: see text]), whereas the low value of the Curie-Weiss temperature [Formula: see text] K excludes any relevant effect from Kondo screening...
November 30, 2016: Journal of Physics. Condensed Matter: An Institute of Physics Journal
Daniel Zhang, Bin Zhang
HSF1 heat shock response has emerged as a valuable non-oncogenetic intervention point in targeted cancer therapy. Current reporter based high throughput screening has led to the discovery of several compounds or chemotypes that are effective in the growth inhibition of multiple cancer cell lines and relevant animal tumor models. However, some intrinsic limitations of reporter based assays can potentially lead to biased results. Using a previously validated high content image based assay, we performed a phenotypic screen targeting HSF1 heat shock pathway with a chemically diversified library of over 100,000 compounds...
September 30, 2016: Biochemical and Biophysical Research Communications
G Andocs, M U Rehman, Q-L Zhao, Y Tabuchi, M Kanamori, T Kondo
Loco-regional hyperthermia treatment has long history in oncology. Modulated electro-hyperthermia (mEHT, trade name: oncothermia) is an emerging curative treatment method in this field due to its highly selective actions. The impedance-matched, capacitive-coupled modulated radiofrequency (RF) current is selectively focused in the malignant cell membrane of the cancer cells. Our objective is studying the cell-death process and comparing the cellular effects of conventional water-bath hyperthermia treatment to mEHT...
2016: Cell Death Discovery
Donglin Xu, Ting Zhong, Wendi Feng, Guohui Zhou
Southern rice black-streaked dwarf virus (SRBSDV), a newly emerged fijivirus causing great loss to rice production in eastern and southeastern Asian countries in recent years, is efficiently transmitted by a rice pest, white-backed planthopper (WBPH, Sogatella furcifera) in a persistent, circulative propagative manner and can be considered as an insect virus. In this study, SRBSDV infection in WBPH was found to increase the vector's death rate under extreme cold stress but improve its survival rate under extreme heat stress...
2016: Scientific Reports
Royce Ellen Clifford, Michael Hoffer, Rick Rogers
OBJECTIVE: Using Reactome, a curated Internet database, noise-induced hearing loss studies were aggregated into cellular pathways for organization of the emerging genomic and epigenetic data in the literature. DATA SOURCES: PubMed and, a relational data base program systematizing biological processes into interactive pathways and subpathways based on ontology, cellular constituents, gene expression, and molecular components. STUDY SELECTION: Peer-reviewed population and laboratory studies for the previous 15 years relating genomics and noise and hearing loss were identified in PubMed...
September 2016: Otology & Neurotology
Rebecca Surtees, Stuart D Dowall, Amelia Shaw, Stuart Armstrong, Roger Hewson, Miles W Carroll, Jamel Mankouri, Thomas A Edwards, Julian A Hiscox, John N Barr
UNLABELLED: The Nairovirus genus of the Bunyaviridae family contains serious human and animal pathogens classified within multiple serogroups and species. Of these serogroups, the Crimean-Congo hemorrhagic fever virus (CCHFV) serogroup comprises sole members CCHFV and Hazara virus (HAZV). CCHFV is an emerging zoonotic virus that causes often-fatal hemorrhagic fever in infected humans for which preventative or therapeutic strategies are not available. In contrast, HAZV is nonpathogenic to humans and thus represents an excellent model to study aspects of CCHFV biology under conditions of more-accessible biological containment...
October 15, 2016: Journal of Virology
Pei-Chih Wu, Chi-Chen Lee
Climate change is the greatest threat to public health in the 21st century. The increasing health impact of heat waves, the increasing magnitudes and spatial expansions of vector and water-borne diseases epidemics, and the increasing medical burdens of biological allergic illnesses, worsening local air pollution, and other related issues are expected to continue to increase in severity in the near future. All of these issues are global problems that must be faced. Adaptation strategies and action plans related to climate change are needed and emerging...
August 2016: Hu Li za Zhi the Journal of Nursing
Angélique Montagu, Marie-Laure Joly-Guillou, Elisabeth Rossines, Jérome Cayon, Marie Kempf, Patrick Saulnier
Acinetobacter baumannii has emerged as a major cause of nosocomial infections. The ability of A. baumannii to display various resistance mechanisms against antibiotics has transformed it into a successful nosocomial pathogen. The limited number of antibiotics in development and the disengagement of the pharmaceutical industry have prompted the development of innovative strategies. One of these strategies is the use of essential oils, especially aromatic compounds that are potent antibacterial molecules. Among them, the combination of carvacrol and cinnamaldehyde has already demonstrated antibacterial efficacy against A...
2016: Frontiers in Microbiology
Matt Luther, Fergus W Gardiner, Claire Hansen, David Caldicott
The aim of this study was to determine whether a revised heat warning threshold provides an enhanced predictive tool for increases in Emergency Department heat-related presentations in Canberra, Australia. All Emergency Department triage records containing the word "heat", as well as those diagnosing a heat related illness for the summer periods 2013/2014, 2014/2015, and 2015/2016 were searched. Then a medical record review was conducted to confirm that the patient's presentation was related to environmental heat, which was defined by the final clinical diagnosis, presentation complaint and details of the patient's treatment...
2016: International Journal of Environmental Research and Public Health
Carl-Friedrich Schleussner, Jonathan F Donges, Reik V Donner, Hans Joachim Schellnhuber
Social and political tensions keep on fueling armed conflicts around the world. Although each conflict is the result of an individual context-specific mixture of interconnected factors, ethnicity appears to play a prominent and almost ubiquitous role in many of them. This overall state of affairs is likely to be exacerbated by anthropogenic climate change and in particular climate-related natural disasters. Ethnic divides might serve as predetermined conflict lines in case of rapidly emerging societal tensions arising from disruptive events like natural disasters...
August 16, 2016: Proceedings of the National Academy of Sciences of the United States of America
Jian Cheng, Zhiwei Xu, Desheng Zhao, Mingyu Xie, Heng Zhang, Shusi Wang, Hong Su
BACKGROUND: Although studies have well documented increased mortality risk during extreme heat and heatwaves, few have examined their impacts on emergency ambulance dispatches under different temperature metrics. Additionally, evidence on the attributable risk of emergency ambulance dispatches due to extreme heat and heatwaves is scarce around the world. METHODS: A distributed lag nonlinear model (DLNM) was applied to quantify the impact of extreme heat and heatwaves on emergency ambulance dispatches in Huainan, China, during 2011-2013...
November 15, 2016: Science of the Total Environment
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