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https://www.readbyqxmd.com/read/28644243/role-of-breathing-conditions-during-exercise-testing-on-training-prescription-in-chronic-obstructive-pulmonary-disease
#1
Daniel Neunhäuserer, Eva Steidle-Kloc, Marco Bergamin, Gertraud Weiss, Andrea Ermolao, Bernd Lamprecht, Michael Studnicka, Josef Niebauer
This study investigated whether different breathing conditions during exercise testing will influence measures of exercise capacity commonly used for training prescription in chronic obstructive pulmonary disease. Twenty-seven patients with chronic obstructive pulmonary disease (forced expiratory volume in 1 sec = 45.6 [9.4]%) performed three maximal exercise tests within 8 days, but at least 48 hrs apart. Subjects were thereby breathing either room air through a tightly fitting face mask like during any cardiopulmonary exercise test (MASK), room air without mask (No-MASK), or 10 l/min of oxygen via nasal cannula (No-MASK + O2)...
June 21, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28642502/quasi-stabilized-hydration-layers-on-muscovite-mica-under-a-thin-water-film-grown-from-humid-air
#2
Toyoko Arai, Kohei Sato, Asuka Iida, Masahiko Tomitori
The interfaces between solids and water films in air play fundamental roles in physicochemical phenomena, biological functions, and nano-fabrication. Though the properties of the interfaces have been considered to be irrelevant to the water film thickness, we found distinctive mechanical features of the interface between a cleaved muscovite mica surface and a thin water film grown in humid air, dissimilar to those in bulk water, using frequency-modulation atomic force microscopy. The thin water film grew with quasi-stabilized hydration networks of water molecules, tightly bound each other at the interface, to a thickness of ~2 nm at near-saturating humidity...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28640607/primary-and-photochemically-aged-aerosol-emissions-from-biomass-cookstoves-chemical-and-physical-characterization
#3
Stephen M Reece, Aditya Sinha, Andrew P Grieshop
Secondary organic aerosol (SOA) formation during photo-oxidation of primary emissions from cookstoves used in developing countries may make important contributions to their climate and air quality impacts. We present results from laboratory experiments with a field portable oxidation flow reactor (F-OFR) to study the evolution of emissions over hours to weeks of equivalent atmospheric aging. Lab tests, using dry red oak, measured fresh and aged emissions from a 3 stone fire (TSF), a "rocket" natural draft stove (NDS) and a forced draft gasifier stove (FDGS), in order of increasing modified combustion efficiency (MCE) and decreasing particulate matter emission factors (EF)...
June 22, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28640037/epidemiology-of-major-depressive-disorder-disability-in-the-us-military-fy-2007-2012
#4
Elizabeth R Packnett, Hoda Elmasry, Christine F Toolin, David N Cowan, Michael R Boivin
This study assesses the incidence of major depressive disorder (MDD) disability discharge and retirement in the Army, Navy, Marine Corps and Air Force and describes MDD comorbidity. Service members with a disability discharge for either MDD (n = 2,882) or any nonpsychiatric disability (n = 56,145), between fiscal years 2007 and 2012, were included in the study population. Those with MDD disability at first evaluation but not at last evaluation were excluded. The incidence of MDD disability discharge increased significantly in the Army and Air Force between fiscal years 2007 and 2012...
June 20, 2017: Journal of Nervous and Mental Disease
https://www.readbyqxmd.com/read/28639328/immunogenicity-of-protein-aggregates-of-a-monoclonal-antibody-generated-by-forced-shaking-stress-with-siliconized-and-nonsiliconized-syringes-in-balb-c-mice
#5
Tomonobu Uchino, Yasunori Miyazaki, Takuto Yamazaki, Yoshiyuki Kagawa
OBJECTIVE: In this study, we aimed to investigate the immunogenicity of protein aggregates of monoclonal antibodies (mAbs), generated by forced shaking stress with siliconized and nonsiliconized syringes in a mouse model. METHODS: Samples were filled in siliconized and nonsiliconized syringes with shaking and headspace air. Characterization studies were performed using high-performance size-exclusion chromatography, nanoparticle tracking analysis, flow cytometry, micro-flow imaging and resonant mass measurement...
June 21, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28638426/pulmonary-functions-and-health-related-quality-of-life-among-silica-exposed-workers
#6
Hamzeh Mohammadi, Somayeh Farhang Dehghan, Farideh Golbabaei, Saman Roshani, Reza Pakzad, Parvin Foroughi, Roohalah Hajizadeh
BACKGROUND: This study aimed to investigate the pulmonary functions of silica-exposed workers and their health-related quality of life in an insulator manufacturing industry. MATERIALS AND METHODS: In this cross-sectional study, participants selected from the manufacturing unit (n = 127) constituted the exposed group and those from the administrative department (n = 30) constituted the unexposed group. All subjects were evaluated using personal air sampling of crystalline silica, pulmonary function tests, and a quality of life questionnaire (36-item short form health survey [SF-36])...
2017: Tanaffos
https://www.readbyqxmd.com/read/28636780/nanoelectrical-and-nanoelectrochemical-imaging-of-pt-p-si-and-pt-p-si-electrodes
#7
Jingjing Jiang, Zhuangqun Huang, Chengxiang Xiang, Rakesh Poddar, Hans-Joachim Lewerenz, Kimberly M Papadantonakis, Nathan Lewis, Bruce Brunschwig
The interfacial properties of electrolessly deposited Pt nanoparticles (Pt-NP) on p-Si and p+-Si electrodes have been resolved on the nanometer scale using a combination of scanning probe methods. Atomic-force microscopy (AFM) showed highly dispersed Pt nanoparticles. Conductive AFM measurements showed that only about half of the particles exhibited measurable contact currents, with a factor of 10^3 difference in current. Local current-voltage measurements revealed a rectifying junction with a resistance of ≥ 10 MΩ at the Pt-NP/p-Si interface, while Pt-NP/p+-Si samples formed an Ohmic junction with a local resistance of ≥ 1 MΩ...
June 21, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28630743/comparison-of-five-video-assisted-intubation-devices-by-novice-and-expert-laryngoscopists-for-use-in-the-aeromedical-evacuation-environment
#8
Matthew C Wallace, SSgt Tyler Britton, Robbie Meek, Sharon Walsh-Hart, Col Todd E Carter, Steven J Lisco
BACKGROUND: The critically ill or injured patient undergoing military medical evacuation may require emergent intubation. Intubation may be life-saving, but it carries risks. The novice or infrequent laryngoscopist has a distinct disadvantage because experience is critical for the rapid and safe establishment of a secured airway. This challenge is compounded by the austere environment of the back of an aircraft under blackout conditions. This study determined which of five different video-assisted intubation devices (VAIDs) was best suited for in-flight use by U...
2017: Military Medical Research
https://www.readbyqxmd.com/read/28630446/strong-sub-seasonal-wintertime-cooling-over-east-asia-and-northern-europe-associated-with-super-el-ni%C3%A3-o-events
#9
Xin Geng, Wenjun Zhang, Malte F Stuecker, Fei-Fei Jin
East Asia experienced a record-breaking cold event during the 2015/16 boreal winter, with pronounced impacts on livelihood in the region. We find that this large-scale cold spell can be attributed to the concurrent super El Niño event in the tropical Pacific. Our analysis reveals that all super El Niño winters (1982/83, 1997/98, and 2015/16) were accompanied by a rapid sub-seasonal North Atlantic Oscillation (NAO)/Arctic Oscillation (AO) phase reversal from a positive to a negative state during early January, which was largely caused by the interaction of these super El Niño events with the subtropical jet annual cycle...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28628819/dissolved-gaseous-mercury-formation-and-mercury-volatilization-in-intertidal-sediments
#10
Rute Cesário, Laurier Poissant, Martin Pilote, Nelson J O'Driscoll, Ana M Mota, João Canário
Intertidal sediments of Tagus estuary regularly experiences complex redistribution due to tidal forcing, which affects the cycling of mercury (Hg) between sediments and the water column. This study quantifies total mercury (Hg) and methylmercury (MMHg) concentrations and fluxes in a flooded mudflat as well as the effects on water-level fluctuations on the air-surface exchange of mercury. A fast increase in dissolved Hg and MMHg concentrations was observed in overlying water in the first 10min of inundation and corresponded to a decrease in pore waters, suggesting a rapid export of Hg and MMHg from sediments to the water column...
June 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28628138/-effects-of-exposure-to-ambient-particulate-matter-and-polycyclic-aromatic-hydrocarbons-on-oxidative-stress-biomarkers-in-the-patients-with-chronic-obstructive-pulmonary-disease
#11
Y Zhang, X M Song, Q Zhao, T Wang, L J Li, J Chen, H B Xu, B B Liu, X Y Sun, B He, W Huang
OBJECTIVE: To investigate the effects of exposure to ambient particulate matter (PM) and polycyclic aromatic hydrocarbons (PAHs) on systemic oxidative stress biomarkers in chronic obstructive pulmonary disease (COPD) patients. METHODS: A panel of forty-five diagnosed and stable COPD patients, whose residences were within 5 kilometers from Peking University Health Science Center (PKUHSC), were recruited and followed up twice between November 2014 and May 2015. The lung function index percentage of forced expiratory volume in 1 second (FEV1) to predicted value (FEV1%pred), was measured to reflect the severity of COPD patients...
June 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28626920/experimental-verification-of-egsnrc-monte-carlo-calculated-depth-doses-within-a-realistic-parallel-magnetic-field-in-a-polystyrene-phantom
#12
Andrei Ghila, Stephen Steciw, B Gino Fallone, Satyapal Rathee
PURPOSE: Integrating a linac with a magnetic resonance imager (MRI) will revolutionize the accuracy of external beam radiation treatments. Irradiating in the presence of a strong magnetic field, however, will modify the dose distribution. These dose modifications have been investigated previously, mainly using Monte Carlo simulations. The purpose of this work is to experimentally verify the use of the EGSnrc Monte Carlo (MC) package for calculating percent depth doses (PDDs) in a homogeneous phantom, in the presence of a realistic parallel magnetic field...
June 19, 2017: Medical Physics
https://www.readbyqxmd.com/read/28623354/tomographic-particle-image-velocimetry-using-smartphones-and-colored-shadows
#13
Andres A Aguirre-Pablo, Meshal K Alarfaj, Er Qiang Li, J F Hernández-Sánchez, Sigurdur T Thoroddsen
We demonstrate the viability of using four low-cost smartphone cameras to perform Tomographic PIV. We use colored shadows to imprint two or three different time-steps on the same image. The back-lighting is accomplished with three sets of differently-colored pulsed LEDs. Each set of Red, Green & Blue LEDs is shone on a diffuser screen facing each of the cameras. We thereby record the RGB-colored shadows of opaque suspended particles, rather than the conventionally used scattered light. We subsequently separate the RGB color channels, to represent the separate times, with preprocessing to minimize noise and cross-talk...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28622329/plastic-modification-of-the-cornea-by-pneumatic-force-corrects-myopia-pneumatic-keratology
#14
A Medina
PurposeThe eyeball and, in particular, the cornea deform in vitro by the application of a distending force like other visco-elastic tissue. If the force is large enough, the cornea strains beyond the elastic range, and a permanent deformation occurs. Such permanent strain is referred to as 'plastic' strain. The phenomenon, however, has never been observed or produced on living tissue. This report seeks to demonstrate that the central radius of a patient's cornea can be altered in a controlled manner designed to correct refractive errors...
June 16, 2017: Eye
https://www.readbyqxmd.com/read/28622180/a-prospective-study-of-loose-tissue-fragments-in-non-small-cell-lung-cancer-resection-specimens-an-alternative-view-to-spread-through-air-spaces
#15
Hans Blaauwgeers, Douglas Flieder, Arne Warth, Alexander Harms, Kim Monkhorst, Birgit Witte, Erik Thunnissen
The World Health Organization Classification of Lung Tumors considers "Spread Through Air Spaces" a form of invasion in lung adenocarcinoma. The recently described spread of free-floating cell clusters during lung specimen sectioning, otherwise known as "Spread Through A Knife Surface," represents an ex vivo artifact. The purpose of this study was to prospectively investigate the presence and frequency of these free-floating tumor cell clusters in surgically resected lung cancer specimens and their possible relation to gross examination procedures...
June 15, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28621975/gas-marbles-much-stronger-than-liquid-marbles
#16
Yousra Timounay, Olivier Pitois, Florence Rouyer
Enwrapping liquid droplets with hydrophobic particles allows the manufacture of so-called "liquid marbles" [Aussillous and Quéré Nature (London) 411, 924 (2001); NATUAS0028-083610.1038/35082026Mahadevan Nature (London)411, 895 (2001)NATUAS0028-083610.1038/35082164]. The recent intensive research devoted to liquid marbles is justified by their very unusual physical and chemical properties and by their potential for various applications, from microreactors to water storage, including water pollution sensors [Bormashenko Curr...
June 2, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28621535/effects-of-frothers-and-oil-at-saltwater-air-interfaces-for-oil-separation-molecular-dynamics-simulations-and-experimental-measurements
#17
Leebyn Chong, Yungchieh Lai, McMahan Gray, Yee Soong, Fan Shi, Yuhua Duan
Separating oil from saltwater is a process relevant to some industries and may be aided by bubble and froth generation. Simulating saltwater-air interfaces adsorbed with surfactants and oil molecules can assist in understanding froth stability to improve separation. Combining with surface tension experimental measurements, in this work we employ molecular dynamics with a united-atom force field to linear alkane oil and three surfactant frothers: methyl isobutyl carbinol (MIBC), terpineol, and ethyl glycol butyl ether (EGBE) to investigate their synergistic behaviors for oil separation...
June 16, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28621136/three-dimensional-morphology-control-yielding-enhanced-hole-mobility-in-air-processed-organic-photovoltaics-demonstration-with-grazing-incidence-wide-angle-x-ray-scattering
#18
Levi M J Moore, Mithun Bhattacharya, Qi Wu, Sang Gil Youm, Evgueni E Nesterov, Sarah E Morgan
Polymer organic photovoltaic (OPV) device performance is defined by the three-dimensional morphology of the phase separated domains in the active layer. Here, we determine the evolution of morphology through different stages of tailored solvent vapor and thermal processing techniques in air-processed poly(3-hexylthiophene-2,5-diyl):phenyl-C61-butyric acid methyl ester (P3HT:PCBM) based OPV blends. A comparative evaluation of the effect of solvent type used for vapor annealing was performed using grazing incidence wide angle x-ray scattering, atomic force microscopy, and UV-vis spectroscopy to probe the active layer morphology...
June 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28620807/predictive-factors-of-maternal-hypothermia-during-cesarean-delivery-a-prospective-cohort-study
#19
François-Pierrick Desgranges, Lionel Bapteste, Céline Riffard, Marius Pop, Bérengère Cogniat, Anne-Charlotte Gagey, Pierre Boucher, Corinne Bonnard, Brigitte Paturel, Christine Mullet, Dominique Chassard, Lionel Bouvet
PURPOSE: Although perioperative hypothermia may increase maternal morbidity, active warming is infrequently performed to maintain normothermia during Cesarean delivery (CD). The aim of this prospective observational study was to determine the factors associated with maternal hypothermia in this setting. METHODS: Women scheduled for elective or emergency CD were consecutively included in this study from November 2014 to October 2015. Maternal temperature was measured using an infrared tympanic thermometer on the patient's arrival in the operating room, at skin incision, and at the end of skin suture...
June 15, 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/28619381/recent-experimental-advances-for-understanding-bubble-particle-attachment-in-flotation
#20
REVIEW
Yaowen Xing, Xiahui Gui, Lei Pan, Bat-El Pinchasik, Yijun Cao, Jiongtian Liu, Michael Kappl, Hans-Jürgen Butt
Bubble-particle interaction is of great theoretical and practical importance in flotation. Significant progress has been achieved over the past years and the process of bubble-particle collision is reasonably well understood. This, however, is not the case for bubble-particle attachment leading to three-phase contact line formation due to the difficulty in both theoretical analysis and experimental verification. For attachment, surface forces play a major role. They control the thinning and rupture of the liquid film between the bubble and the particle...
May 31, 2017: Advances in Colloid and Interface Science
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