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https://www.readbyqxmd.com/read/28748371/acute-effects-of-heated-resistance-exercise-in-female-and-male-power-athletes
#1
Julia R Casadio, Adam G Storey, Fabrice Merien, Andrew E Kilding, James D Cotter, Paul B Laursen
PURPOSE: To determine the effects of heated resistance exercise on thermal strain, neuromuscular function and hormonal responses in power athletes. METHODS: Sixteen (n = 8 female; 8 male) highly trained power athletes completed a combined strength and power resistance exercise session in hot (HOT ~30 °C) and temperate (CON ~20 °C) conditions. Human growth hormone (hGH), cortisol and testosterone concentrations in plasma, peak power (counter-movement jump, CMJ) and peak force (isometric mid-thigh pull) were measured before and after each training session; thermoregulatory responses were monitored during training...
July 26, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28747633/a-room-temperature-continuous-wave-nanolaser-using-colloidal-quantum-wells
#2
Zhili Yang, Matthew Pelton, Igor Fedin, Dmitri V Talapin, Edo Waks
Colloidal semiconductor nanocrystals have emerged as promising active materials for solution-processable optoelectronic and light-emitting devices. In particular, the development of nanocrystal lasers is currently experiencing rapid progress. However, these lasers require large pump powers, and realizing an efficient low-power nanocrystal laser has remained a difficult challenge. Here, we demonstrate a nanolaser using colloidal nanocrystals that exhibits a threshold input power of less than 1 μW, a very low threshold for any laser using colloidal emitters...
July 26, 2017: Nature Communications
https://www.readbyqxmd.com/read/28746891/long-term-variations-in-sediment-heavy-metals-of-a-reservoir-with-changing-trophic-states-implications-for-the-impact-of-climate-change
#3
Qiong Wu, Jun Qi, Xinghui Xia
Two dated sediment cores from the Miyun Reservoir of Beijing in China were analyzed to reconstruct the pollution history of heavy metals including cadmium (Cd), chromium (Cr), iron (Fe), nickel (Ni), and zinc (Zn) as well as phosphorus (P). Enrichment factor (EF) and geoaccumulation index (Igeo) were applied to assess the enrichment status of heavy metals. Average EF and Igeo values indicated that the studied heavy metals in the sediments mainly originated from non-point source pollution and soil-water erosion, showing low ecological risks...
July 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28744008/interaction-of-hydrophobic-polymers-with-model-lipid-bilayers
#4
D Bochicchio, E Panizon, L Monticelli, G Rossi
The interaction of nanoscale synthetic materials with cell membranes is one of the key steps determining nanomaterials' toxicity. Here we use molecular simulations, with atomistic and coarse-grained resolution, to investigate the interaction of three hydrophobic polymers with model lipid membranes. Polymer nanoparticles made of polyethylene (PE), polypropylene (PP) and polystyrene with size up to 7 nm enter easily POPC lipid membranes, localizing to the membrane hydrophobic core. For all three materials, solid polymeric nanoparticles become essentially liquid within the membrane at room temperature...
July 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28743152/-prevention-of-perioperative-hypothermia-guidelines-for-daily-clinical-practice
#5
Timo Iden, Jan Höcker
Inadvertent perioperative hypothermia (body core temperature < 36 °C) is a serious complication leading to increased rates of wound infection, higher blood loss associated with increased transfusion requirements as well as patient dissatisfaction among others. Body core temperature is a vital parameter and needs constant monitoring just like heart rate, blood pressure and arterial oxygen saturation. Patient-, anesthesia-, surgery- and environment-related risk factors were identified for occurring perioperative hypothermia...
July 2017: Anästhesiologie, Intensivmedizin, Notfallmedizin, Schmerztherapie: AINS
https://www.readbyqxmd.com/read/28743030/reactive-ceo2-nanofluids-for-uv-protective-films
#6
Rafael Maniglia, Kenneth J Reed, John Texter
We investigate surface modification by organo-trimethoxysilanes of nano-ceria and if such surface-modified nano-ceria can be transformed into solvent-free nanofluids. We also examine whether simultaneous modification with ionic liquid salts and with acrylate groups yields nanofluids suitable for forming UV-protective films and clear coatings by UV-initiated polymerization. Nominally 3nm diameter CeO2 was successfully synthesized and surface decorated with an ionic liquid salt and with acrylate groups to produce a core/shell structured solvent-free nanofluid after ion exchange of chloride for a soft polyoxyethylene sulfonate anion...
July 18, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28742305/pediatric-heat-related-illness-recommendations-for-prevention-and-management
#7
Roberta J. Dunn, Tommy Y. Kim
Infants, children, and adolescents are at increased risk for heat-related illness due to their inability to remove themselves from dangerous environments. Evidence shows that morbidity and mortality from heat illness is related to the length of time core temperature is elevated, so rapid reduction and accurate serial measurements are crucial to prevention of organ system damage and death. The primary methods of patient cooling are conduction (ice-water immersion, cold packs) and convection (moisture and moving air)...
August 2017: Pediatric Emergency Medicine Practice
https://www.readbyqxmd.com/read/28741744/thermal-suit-in-preventing-unintentional-intraoperative-hypothermia-during-general-anaesthesia-a-randomized-controlled-trial
#8
S-L Lauronen, M-L Kalliomäki, A J Aho, J Kalliovalkama, J M Riikonen, M-T Mäkinen, H M Leppikangas, A M Yli-Hankala
BACKGROUND: Unintentional perioperative hypothermia causes serious adverse effects to surgical patients. Thermal suit (T-Balance(®) ) is an option for passive warming perioperatively. We hypothesized that the thermal suit will not maintain normothermia more efficiently than conventional cotton clothes when also other preventive procedures against unintentional hypothermia are used. METHODS: One hundred patients were recruited to this prospective, randomized trial...
July 25, 2017: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/28741242/the-weakening-effect-of-soluble-epoxide-hydrolase-inhibitor-auda-on-febrile-response-to-lipopolysaccharide-and-turpentine-in-rat
#9
Jakub Piotrowski, Tomasz Jędrzejewski, Małgorzata Pawlikowska, Agata Joanna Pacuła, Jacek Ścianowski, Wiesław Kozak
A still growing body of evidence suggests the importance of epoxyeicosatrienoic acids (EETs) in the regulation of inflammatory response; therefore, drugs that stabilize their levels by targeting the soluble epoxide hydrolase (sEH), an enzyme responsible for their metabolism, are currently under investigation. The effect of sEH inhibitors on molecular components of fever mechanism, i.e., on synthesis of pro-inflammatory cytokines or prostaglandins, has been repeatedly proven; however, the hypothesis that sEH inhibitors affect febrile response has never been tested...
July 24, 2017: Journal of Physiology and Biochemistry
https://www.readbyqxmd.com/read/28738815/transcription-through-the-eye-of-a-needle-daily-and-annual-cyclic-gene-expression-variation-in-douglas-fir-needles
#10
Richard Cronn, Peter C Dolan, Sanjuro Jogdeo, Jill L Wegrzyn, David B Neale, J Bradley St Clair, Dee R Denver
BACKGROUND: Perennial growth in plants is the product of interdependent cycles of daily and annual stimuli that induce cycles of growth and dormancy. In conifers, needles are the key perennial organ that integrates daily and seasonal signals from light, temperature, and water availability. To understand the relationship between seasonal cycles and seasonal gene expression responses in conifers, we examined diurnal and circannual needle mRNA accumulation in Douglas-fir (Pseudotsuga menziesii) needles at diurnal and circannual scales...
July 24, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28737915/extended-study-on-crystal-growth-and-viscosity-in-ge-sb-se-bulk-glasses-and-thin-films
#11
Simona Martinkova, Jaroslav Barták, Petr Koštál, Jiri Malek, Hiroyo Segawa
Crystal growth rates in Ge18Sb28Se54 bulk glass and thin film were measured using optical and scanning electron microscopy under isothermal conditions. The studied temperature region was 255 - 346 °C and 254 - 286 °C for bulk glass and thin film, respectively. The compact crystalline layer growing from the surface into the amorphous core was formed in bulk glasses and no bulk crystallization was observed. In the case of thin films, needle-shape crystals were formed. The crystalline layer and needle-shape crystals grew linearly with time that corresponds to crystal growth controlled by the crystal-liquid interface kinetics...
July 24, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28737481/thermal-response-to-firefighting-activities-in-residential-structure-fires-impact-of-job-assignment-and-suppression-tactic
#12
Gavin P Horn, Richard M Kesler, Steve Kerber, Kenneth W Fent, Tad J Schroeder, William S Scott, Patricia C Fehling, Bo Fernhall, Denise L Smith
Firefighters' thermal burden is generally attributed to high heat loads from the fire and metabolic heat generation, which may vary between job assignments and suppression tactic employed. Utilizing a full-sized residential structure, firefighters were deployed in six job assignments utilizing two attack tactics (1. Water applied from the interior, or 2. Exterior water application before transitioning to the interior). Environmental temperatures decreased after water application, but more rapidly with transitional attack...
July 24, 2017: Ergonomics
https://www.readbyqxmd.com/read/28736022/use-of-nanoice-for-procurement-achieves-better-cooling-of-liver-grafts
#13
J D Reyes, F G Jalikis, L C Olson, M Yeh, M I Montenovo
BACKGROUND: Rapid cooling at procurement after cross-clamping has been the cornerstone of organ preservation. NanoICE is a new form of ice that has emerged in the food industry and is providing more efficient cooling and preservation than regular ice. We hypothesize that the use of NanoICE will accelerate the cooling process of the allograft and will be able to maintain a steady low temperature without causing any significant histologic damage. METHODS: In this randomized pilot study, 14 pigs were used to study the liver core/surface cooling in a non-survival organ procurement operation...
July 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28732978/ultrasonic-assisted-environmentally-friendly-synergetic-synthesis-of-nitroaromatic-compounds-in-core-shell-nanoreactor-a-green-protocol
#14
Ali Maleki, Morteza Aghaie
An efficient sonochemical protocol for the nitration of aromatic compounds was described in the presence of a catalytic amount of sulfuric acid-functionalized silica-based core/shell magnetic nanocomposite at room temperature in an eco-friendly and recyclable media, deep eutectic solvent (DES), based on choline chloride and urea. The particle size, morphology and elemental analysis of the core/shell nanocatalyst were carried out by TEM, SEM, EDX and XRD analyses. The nanocatalyst and DES were easily recovered from the reaction mixture quantitatively and reused several times...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28732972/state-of-the-art-and-recent-advances-in-the-ultrasound-assisted-synthesis-exfoliation-and-functionalization-of-graphene-derivatives
#15
REVIEW
Kasturi Muthoosamy, Sivakumar Manickam
Sonochemistry, an almost a century old technique was predominantly employed in the cleaning and extraction processes but this tool has now slowly gained tremendous attention in the synthesis of nanoparticles (NPs) where particles of sub-micron have been produced with great stability. Following this, ultrasonication techniques have been largely employed in graphene synthesis and its dispersion in various solvents which would conventionally take days and offers poor yield. Ultrasonic irradiation allows the production of thin-layered graphene oxide (GO) and reduced graphene oxide (RGO) of up to 1nm thickness and can be produced in single layers...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28732225/influence-of-hypo-and-hyperthermia-on-death-time-estimation-a-simulation-study
#16
H Muggenthaler, M Hubig, S Schenkl, G Mall
Numerous physiological and pathological mechanisms can cause elevated or lowered body core temperatures. Deviations from the physiological level of about 37°C can influence temperature based death time estimations. However, it has not been investigated by means of thermodynamics, to which extent hypo- and hyperthermia bias death time estimates. Using numerical simulation, the present study investigates the errors inherent in temperature based death time estimation in case of elevated or lowered body core temperatures before death...
June 27, 2017: Legal Medicine
https://www.readbyqxmd.com/read/28732167/quantum-transport-and-sub-band-structure-of-modulation-doped-gaas-alas-core-superlattice-nanowires
#17
Dominik M Irber, Jakob Seidl, Damon J Carrad, Jonathan Becker, Nari Jeon, Bernhard Loitsch, Julia Winnerl, Sonja Matich, Markus Döblinger, Yang Tang, Stefanie Morkötter, Gerhard Abstreiter, Jonathan J Finley, Matthew Grayson, Lincoln J Lauhon, Gregor Koblmüller
Modulation-doped III-V semiconductor nanowire (NW) heterostructures have recently emerged as promising candidates to host high-mobility electron channels for future high-frequency, low-energy transistor technologies. The one-dimensional geometry of NWs also makes them attractive for studying quantum confinement effects. Here, we report correlated investigations into the discrete electronic sub-band structure of confined electrons in the channel of Si δ-doped GaAs-GaAs/AlAs core-superlattice NW heterostructures and the associated signatures in low-temperature transport...
July 26, 2017: Nano Letters
https://www.readbyqxmd.com/read/28732157/large-scale-statistics-for-threshold-optimization-of-optically-pumped-nanowire-lasers
#18
Juan Arturo Alanis, Dhruv Saxena, Sudha Mokkapati, Nian Jiang, Kun Peng, Xiaoyan Tang, Lan Fu, Hark Hoe Tan, Chennupati Jagadish, Patrick Parkinson
Single nanowire lasers based on bottom-up III-V materials have been shown to exhibit room-temperature near-infrared lasing, making them highly promising for use as nanoscale, silicon-integrable, and coherent light sources. While lasing behavior is reproducible, small variations in growth conditions across a substrate arising from the use of bottom-up growth techniques can introduce interwire disorder, either through geometric or material inhomogeneity. Nanolasers critically depend on both high material quality and tight dimensional tolerances, and as such, lasing threshold is both sensitive to and a sensitive probe of such inhomogeneity...
July 25, 2017: Nano Letters
https://www.readbyqxmd.com/read/28731511/hypothermia-at-neonatal-intensive-care-unit-admission-was-not-associated-with-respiratory-disease-or-death-in-very-preterm-infants
#19
C F Jensen, F Ebbesen, J P Petersen, A Sellmer, C C Bach, T B Henriksen
AIM: This study investigated the association between hypothermia and respiratory distress syndrome (RDS), bronchopulmonary dysplasia (BPD) or death in very preterm infants admitted to a Danish neonatal intensive care unit (NICU). METHODS: We studied 675 infants born at Aalborg University Hospital before 32 weeks and admitted to the NICU from April 1997 to December 2011. Hypothermia was defined as a core temperature of less than 36.5°C on admission. The primary outcome was severe RDS or death within the first three days of life and the secondary outcome was BPD or death before 36 postmenstrual weeks...
July 21, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28728767/precision-sensitivity-and-patient-preference-of-non-invasive-thermometers-in-a-pediatric-surgical-acute-care-setting
#20
Esther Opersteny, Hanna Anderson, Jourdan Bates, Katie Davenport, Jennifer Husby, Karissa Myking, Assaf P Oron
PURPOSE: The purpose of the project was to compare the temporal artery thermometer (TAT) to the digital probe thermometer readings at axillary or oral sites, to determine the relative precision and sensitivity of the three methods of thermometry, to compare their readings to core temperature when feasible, and to survey patient and family thermometer preferences. DESIGN & METHODS: A randomized crossover design in a 70-bed surgical unit over eight months. Two sets of temperature measurements were obtained for each patient: TAT, axillary, oral (depending on patient ability) and a bladder temperature representing core body temperature (when available)...
July 2017: Journal of Pediatric Nursing
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