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https://www.readbyqxmd.com/read/28107622/newton-output-blocking-force-under-low-voltage-stimulation-for-carbon-nanotube-electroactive-polymer-composite-artificial-muscles
#1
I-Wen Peter Chen, Ming-Chia Yang, Chia-Hui Yang, Yiwen Chen, Dai-Xuan Zhong, Ming-Chun Hsu
This is a study on the development of carbon nanotube-based composite actuators using a new ionic liquid-doped electroactiveionic polymer. For scalable production purposes, a simple hot-pressing method was used. Carbon nanotube/ionic liquid-Nafion/carbon nanotube composite films were fabricated that exhibited a large output blocking force and a stable cycling life with low alternating voltage stimuli in air. Of particular interest and importance, a blocking force of 1.5 N was achieved at an applied voltage of 6 V...
January 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28106209/sub-100-nm-wrinkling-of-polydimethylsiloxane-by-double-frontal-oxidation
#2
Manuela Nania, Fabrizia Foglia, Omar K Matar, João T Cabral
We demonstrate nanoscale wrinkling on polydimethylsiloxane (PDMS) at sub-100 nm length scales via a (double) frontal surface oxidation coupled with a mechanical compression. The kinetics of the glassy skin propagation is resolved by neutron and X-ray reflectivity, and atomic force microscopy, combined with mechanical wrinkling experiments to evaluate the resulting pattern formation. In conventional PDMS surface oxidation, the smallest wrinkling patterns attainable have an intrinsic lower wavelength limit due to the coupling of skin formation and front propagation at fixed strain εprestrain, whose maximum is, in turn, set by material failure...
January 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28102922/effect-of-the-unfilled-space-size-of-the-abutment-screw-access-hole-on-the-extruded-excess-cement-and-retention-of-single-implant-zirconia-crowns
#3
Sulieman S Al-Johany, Mohammad D Al Amri, Ahmed S Al-Bakri, Mohammed N Al-Qarni
PURPOSE: To evaluate in vitro the effect of the size of the unfilled space of the abutment screw access hole on the amount of extruded excess cement and the retention of zirconia copings. MATERIALS AND METHODS: Twelve dental implant replicas were attached to the corresponding abutments and embedded in acrylic resin blocks. A total of 36 CAD/CAM zirconia copings were fabricated by one technician using the standard technique. Abutments were divided into group I: the entire screw access channel was completely filled (nonspaced); group II: 1-mm-spaced; and group III: 2-mm-spaced...
January 19, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28102073/estimates-of-health-impacts-and-radiative-forcing-in-winter-haze-in-eastern-china-through-constraints-of-surface-pm2-5-predictions
#4
Meng Gao, Pablo E Saide, Jinyuan Xin, Yuesi Wang, Zirui Liu, Yuxuan Wang, Zifa Wang, Mariusz Pagowski, Sarath K Guttikunda, Gregory R Carmichael
The Gridpoint Statistical Interpolation (GSI) Three-Dimensional Variational (3DVAR) data assimilation system is extended to treat the MOSAIC aerosol model in WRF-Chem, and to be capable of assimilating surface PM2.5 concentrations. The coupled GSI-WRF-Chem system is applied to reproduce aerosol levels over China during an extremely polluted winter month, January 2013. After assimilating surface PM2.5 concentrations, the correlation coefficients between observations and model results averaged over the assimilated sites are improved from 0...
January 19, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28100545/chronic-effects-of-air-pollution-on-lung-function-after-lung-transplantation-in-the-systems-prediction-of-chronic-lung-allograft-dysfunction-sysclad-study
#5
Meriem Benmerad, Rémy Slama, Karine Botturi, Johanna Claustre, Antoine Roux, Edouard Sage, Martine Reynaud-Gaubert, Carine Gomez, Romain Kessler, Olivier Brugière, Jean-François Mornex, Sacha Mussot, Marcel Dahan, Véronique Boussaud, Isabelle Danner-Boucher, Claire Dromer, Christiane Knoop, Annick Auffray, Johanna Lepeule, Laure Malherbe, Frederik Meleux, Laurent Nicod, Antoine Magnan, Christophe Pison, Valérie Siroux
An irreversible loss in lung function limits the long-term success in lung transplantation. We evaluated the role of chronic exposure to ambient air pollution on lung function levels in lung transplant recipients (LTRs).The lung function of 520 LTRs from the Cohort in Lung Transplantation (COLT) study was measured every 6 months. The levels of air pollutants (nitrogen dioxide (NO2), particulate matter with an aerodynamic cut-off diameter of x µm (PMx) and ozone (O3)) at the patients' home address were averaged in the 12 months before each spirometry test...
January 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28098835/an-electrostatic-barrier-forming-window-that-captures-airborne-pollen-grains-to-prevent-pollinosis
#6
Yoshihiro Takikawa, Yoshinori Matsuda, Teruo Nonomura, Koji Kakutani, Shin-Ichi Kusakari, Hideyoshi Toyoda
An electrostatic-barrier-forming window (EBW) was devised to capture airborne pollen, which can cause allergic pollinosis. The EBW consisted of three layers of insulated conductor wires (ICWs) and two voltage generators that supplied negative charges to the two outer ICW layers and a positive charge to the middle ICW layer. The ICWs generated an attractive force that captured pollen of the Japanese cedar, Cryptomeria japonica, from air blown through the EBW. The attractive force was directly proportional to the applied voltage...
January 15, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28098788/evaluation-of-potential-average-daily-doses-adds-of-pm2-5-for-homemakers-conducting-pan-frying-inside-ordinary-homes-under-four-ventilation-conditions
#7
Seonyeop Lee, Sol Yu, Sungroul Kim
Several studies reported that commercial barbecue restaurants likely contribute to the indoor emission of particulate matters with a diameter of 2.5 micrometers or less (PM2.5) while pan-frying meat. However, there is inadequate knowledge of exposure level to indoor PM2.5 in homes and the contribution of a typical indoor pan-frying event. We measured the indoor PM2.5 concentration and, using Monte-Carlo simulation, estimated potential average daily dose (ADD) of PM2.5 for homemakers pan-frying a piece of pork inside ordinary homes...
January 13, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28095106/gender-differences-in-static-and-dynamic-postural-stability-of-soldiers-of-the-army-s-101st-airborne-division-air-assault
#8
Timothy C Sell, Mita T Lovalekar, Takashi Nagai, Michael D Wirt, John P Abt, Scott M Lephart
CONTEXT: Postural stability is essential for injury prevention and performance. Differences between genders may affect training focus. OBJECTIVE: To examine static and dynamic postural stability (PS) in male and female Soldiers Design: Descriptive Laboratory Study. SETTING: Biomechanics laboratory. PARTICIPANTS: Twenty-five healthy female Soldiers (26.4 ± 5.3 years) and twenty-five healthy male Soldiers (26.4 ± 4.9) years matched on physical demand rating, and years of service from the Army's 101st Airborne Division (Air Assault)...
January 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28094791/weakening-of-annual-temperature-cycle-over-the-tibetan-plateau-since-the-1870s
#9
Jianping Duan, Jan Esper, Ulf Büntgen, Lun Li, Elena Xoplaki, Huan Zhang, Lily Wang, Yongjie Fang, Jürg Luterbacher
The annual cycle of extra-tropical surface air temperature is an important component of the Earth's climate system. Over the past decades, a reduced amplitude of this mode has been observed in some regions. Although attributed to anthropogenic forcing, it remains unclear when dampening of the annual cycle started. Here we use a residual series of tree-ring width and maximum latewood density from the Tibetan Plateau >4,000 m asl to reconstruct changes in temperature seasonality over the past three centuries...
January 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28091814/effects-of-forced-movements-on-learning-findings-from-a-choice-reaction-time-task-in-rats
#10
Hidekazu Kaneko, Hiroto Sano, Yasuhisa Hasegawa, Hiroshi Tamura, Shinya S Suzuki
To investigate how motor sensation facilitates learning, we used a sensory-motor association task to determine whether the sensation induced by forced movements contributes to performance improvements in rats. The rats were trained to respond to a tactile stimulus (an air puff) by releasing a lever pressed by the stimulated (compatible condition) or nonstimulated (incompatible condition) forepaw. When error rates fell below 15%, the compatibility condition was changed (reversal learning). An error trial was followed by a lever activation trial in which a lever on the correct or the incorrect response side was automatically elevated at a preset time of 120, 220, 320, or 420 ms after tactile stimulation...
January 14, 2017: Learning & Behavior
https://www.readbyqxmd.com/read/28091813/prolonged-air-leak-following-lobectomy-can-be-predicted-in-lung-cancer-patients
#11
Satoru Okada, Junichi Shimada, Daishiro Kato, Hiroaki Tsunezuka, Masayoshi Inoue
PURPOSE: The purpose of this study was to identify the factors associated with prolonged air leak (PAL) following pulmonary lobectomy for lung cancer. METHODS: The data of 146 patients who underwent pulmonary lobectomy for lung cancer between August 2010 and July 2015 were retrospectively reviewed. Air leaks were assessed daily by a visual evaluation and were categorized as follows: forced expiratory only (Grade 1), expiratory only (Grade 2), or continuous (Grade 3)...
January 13, 2017: Surgery Today
https://www.readbyqxmd.com/read/28089646/a-risk-score-to-predict-the-incidence-of-prolonged-air-leak-after-video-assisted-thoracoscopic-lobectomy-an-analysis-from-the-european-society-of-thoracic-surgeons-database
#12
Cecilia Pompili, Pierre Emmanuel Falcoz, Michele Salati, Zalan Szanto, Alessandro Brunelli
OBJECTIVE: The study objective was to develop an aggregate risk score for predicting the occurrence of prolonged air leak after video-assisted thoracoscopic lobectomy from patients registered in the European Society of Thoracic Surgeons database. METHODS: A total of 5069 patients who underwent video-assisted thoracoscopic lobectomy (July 2007 to August 2015) were analyzed. Exclusion criteria included sublobar resections or pneumonectomies, lung resection associated with chest wall or diaphragm resections, sleeve resections, and need for postoperative assisted mechanical ventilation...
December 22, 2016: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28071776/%C3%AF-%C3%AF-stacking-of-imidazolium-cations-enhances-molecular-layering-of-room-temperature-ionic-liquids-at-their-interfaces
#13
Fujie Tang, Tatsuhiko Ohto, Taisuke Hasegawa, Mischa Bonn, Yuki Nagata
The interfacial structure of room temperature ionic liquids (RTILs) controls many of the unique properties of RTILs, such as the high capacitance of RTILs and the efficiency of charge transport between RTILs and electrodes. RTILs have been experimentally shown to exhibit interfacial molecular layering structures over a 10 Å length scale. However, the driving force behind the formation of these layered structures has not been resolved. Here, we report ab initio molecular dynamics simulations of imidazolium RTIL/air and RTIL/graphene interfaces along with force field molecular dynamics simulations...
January 10, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28069937/centuries-of-thermal-sea-level-rise-due-to-anthropogenic-emissions-of-short-lived-greenhouse-gases
#14
Kirsten Zickfeld, Susan Solomon, Daniel M Gilford
Mitigation of anthropogenic greenhouse gases with short lifetimes (order of a year to decades) can contribute to limiting warming, but less attention has been paid to their impacts on longer-term sea-level rise. We show that short-lived greenhouse gases contribute to sea-level rise through thermal expansion (TSLR) over much longer time scales than their atmospheric lifetimes. For example, at least half of the TSLR due to increases in methane is expected to remain present for more than 200 y, even if anthropogenic emissions cease altogether, despite the 10-y atmospheric lifetime of this gas...
January 9, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28069413/characterization-of-planar-biomimetic-lipid-films-composed-of-phosphatidylethanolamines-and-phosphatidylglycerols-from-escherichia-coli
#15
Dorota Konarzewska, Joanna Juhaniewicz, Alişan Güzeloğlu, Sławomir Sęk
We have characterized planar lipid films composed of phosphatidylethanolamines (PE) and phosphatidylglycerols (PG) from E. coli bacteria. The nature of the interactions and miscibility of PE and PG components within mixed lipid films was evaluated based on surface pressure measurements and Brewster angle microscopy imaging at the air-water interface. We have found that PE and PG components show tendency to form separated domains at surface pressures relevant for biological membranes. Further, we have directly compared mechanisms of formation of supported lipid bilayers either on mica or Au(111) by spreading of small unilamellar vesicles...
January 7, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28068290/a-collection-system-for-dry-solid-residues-from-exhaled-breath-for-analysis-via-atomic-force-microscopy
#16
Victor N Morozov, Andrey Y Mikheev
Exhaled air contains sub-micron droplets of lung liquid, which potentially bear biomarkers of lung diseases. After dehydration they form dry residue particles (DRPs). As a first step in developing techniques to characterize individual DRPs, a new electrostatic collector was designed in which DRPs are charged within a unipolar corona charger, concentrated in a cone funnel, and deposited onto a limited area of a highly oriented pyrolytic graphite surface. The collector captures 80%-90% of DRPs at an optimal flow rate of 0...
January 9, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28068163/description-and-rate-of-musculoskeletal-injuries-in-air-force-basic-military-trainees-2012-2014
#17
Nathaniel S Nye, Mary T Pawlak, Bryant J Webber, Juste N Tchandja, Michelle R Milner
CONTEXT:  Musculoskeletal injuries are common in military trainees and have significant medical and operational effects. OBJECTIVE:  To provide current musculoskeletal injury epidemiology data for US Air Force basic military trainees. DESIGN:  Descriptive epidemiologic study with cross-sectional features. SETTING:  US Air Force Basic Military Training, Joint Base San Antonio-Lackland, Texas. PATIENTS OR OTHER PARTICIPANTS:  All recruits who entered training between July 1, 2012, and June 30, 2014...
November 2016: Journal of Athletic Training
https://www.readbyqxmd.com/read/28065873/hyperbaric-oxygen-effects-on-depression-like-behavior-and-neuroinflammation-in-traumatic-brain-injury-rats
#18
Sher-Wei Lim, Kuan-Chin Sung, Yow-Ling Shiue, Che-Chuan Wang, Chung-Ching Chio, Jinn-Rung Kuo
OBJECTIVE: The aim of this study was to determine whether hyperbaric oxygen (HBO) therapy causes attenuation of traumatic brain injury (TBI)-induced depression-like behavior and its associated anti-neuroinflammatory effects after fluid percussion injury. METHODS: Anesthetized male Sprague-Dawley rats were divided into three groups: sham operation + NBA (normobaric air: 21% O2 at 1 absolute atmosphere [ATA]), TBI + NBA, and TBI + HBO (100% O2 at 2.0 ATA). HBO was applied immediately for 60 min/day after TBI for 3 days...
January 5, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28063494/studying-gastric-lipase-adsorption-onto-phospholipid-monolayers-by-surface-tensiometry-ellipsometry-and-atomic-force-microscopy
#19
A Bénarouche, L Sams, C Bourlieu, V Vié, V Point, J F Cavalier, F Carrière
The access to kinetic parameters of lipolytic enzyme adsorption onto lipids is essential for a better understanding of the overall catalytic process carried out by these interfacial enzymes. Gastric lipase, for instance, shows an apparent optimum activity on triglycerides (TAG) at acidic pH, which is controlled by its pH-dependent adsorption at lipid-water interfaces. Since gastric lipase acts on TAG droplets covered by phospholipids, but does not hydrolyze these lipids, phospholipid monolayers spread at the air-water interfaces can be used as biomimetic interfaces to study lipase adsorption and penetration through the phospholipid layer, independently from the catalytic activity...
2017: Methods in Enzymology
https://www.readbyqxmd.com/read/28061924/asymptomatic-wolff-parkinson-white-pattern-ecg-in-usaf-aviators
#20
Eddie D Davenport, Karen A N Rupp, Edwin Palileo, Jared Haynes
INTRODUCTION: Wolff-Parkinson-White (WPW) pattern is occasionally found in asymptomatic aviators during routine ECGs. Aeromedical concerns regarding WPW pattern include risk of dysrhythmia or sudden cardiac death (SCD), thus affecting the safety of flight. The purpose of this study was to determine the prevalence and outcomes of aviators with asymptomatic WPW pattern and assess for risk factors that contribute to progression to dysrhythmia or symptoms. METHODS: The U...
January 1, 2017: Aerospace Medicine and Human Performance
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