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https://www.readbyqxmd.com/read/28545257/the-reactive-sulfur-species-concept-15-years-on
#1
REVIEW
Gregory I Giles, Muhammad Jawad Nasim, Wesam Ali, Claus Jacob
Fifteen years ago, in 2001, the concept of "Reactive Sulfur Species" or RSS was advocated as a working hypothesis. Since then various organic as well as inorganic RSS have attracted considerable interest and stimulated many new and often unexpected avenues in research and product development. During this time, it has become apparent that molecules with sulfur-containing functional groups are not just the passive "victims" of oxidative stress or simple conveyors of signals in cells, but can also be stressors in their own right, with pivotal roles in cellular function and homeostasis...
May 23, 2017: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/28530119/update-in-sleep-disordered-breathing-2016
#2
Najib T Ayas, Luciano F Drager, Mary J Morrell, Vsevolod Y Polotsky
The field of sleep disordered breathing has continued to evolve with many important articles published in the last year. In this review, we have summarized some of the key articles relevant to sleep disordered breathing that have been published in the Journal and selected articles published elsewhere in the last year; these have included landmark randomized trials concerning sleep apnea treatment in the prevention of adverse cardiac outcomes, basic science and animal studies, genetic studies, and analyses of epidemiologic cohorts...
May 21, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28526593/cardiac-tamponade-as-an-initial-presentation-for-systemic-lupus-erythematosus
#3
William Li, Thomas Frohwein, Kenneth Ong
Systemic lupus erythematosus (SLE) is a chronic autoimmune inflammatory disease which follows a relapsing and remitting course that can manifest in any organ system. While classic manifestations consist of arthralgia, myalgia, frank arthritis, a malar rash and renal failure to name a few, cardiac tamponade, however, is a far less common and far more dangerous presentation. We highlight the case of a 61year-old male with complaints of acute onset shortness of breath and generalized body aches associated with a fever and chills in the ER...
April 29, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28524229/exercise-induced-quadriceps-muscle-fatigue-in-men-and-women-effects-of-arterial-oxygen-content-and-respiratory-muscle-work
#4
Paolo B Dominelli, Yannick Molgat-Seon, Donald E G Griesdale, Carli M Peters, Jean-Sébastien Blouin, Mypinder Sekhon, Giulio S Dominelli, William R Henderson, Glen E Foster, Lee M Romer, Michael S Koehle, A William Sheel
Reducing the work of breathing or eliminating exercise-induced arterial hypoxemia (EIAH) during exercise decreases the severity of quadriceps fatigue in men. Women have a greater work of breathing during exercise, dedicate a greater fraction of whole-body V̇O2 towards their respiratory muscles, and demonstrate EIAH, suggesting women may be especially susceptible to quadriceps fatigue. Healthy subjects (8M, 8F) completed three constant load exercise tests over four days. During the first (control) test, subjects exercised at ∼85% of maximum while arterial blood gases and work of breathing were assessed...
May 19, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28516050/towards-mri-temperature-mapping-in-real-time-the-proton-resonance-frequency-method-with-undersampled-radial-mri-and-nonlinear-inverse-reconstruction
#5
Zhongshuai Zhang, Thomas Michaelis, Jens Frahm
BACKGROUND: Optimal control of minimally invasive interventions by hyperthermia requires dynamic temperature mapping at high temporal resolution. METHODS: Based on the temperature-dependent shift of the proton resonance frequency (PRF), this work developed a method for real-time MRI thermometry which relies on highly undersampled radial FLASH MRI sequences with iterative image reconstruction by regularized nonlinear inversion (NLINV). As a first step, the method was validated with use of a temperature phantom and ex vivo organs (swine kidney) subjected to heating by warm water or a pulsed laser source...
April 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28507549/human-lung-mononuclear-phagocytes-in-health-and-disease
#6
REVIEW
Faezzah Baharom, Gregory Rankin, Anders Blomberg, Anna Smed-Sörensen
The lungs are vulnerable to attack by respiratory insults such as toxins, allergens, and pathogens, given their continuous exposure to the air we breathe. Our immune system has evolved to provide protection against an array of potential threats without causing collateral damage to the lung tissue. In order to swiftly detect invading pathogens, monocytes, macrophages, and dendritic cells (DCs)-together termed mononuclear phagocytes (MNPs)-line the respiratory tract with the key task of surveying the lung microenvironment in order to discriminate between harmless and harmful antigens and initiate immune responses when necessary...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28504359/changing-the-paradigm-for-diagnostic-mri-in-pediatrics-don-t-hold-your-breath
#7
Melissa M Masaracchia, Michael J Tsapakos, Nancy J McNulty, Michael L Beach
Increasingly complex pediatric patients and improvements in technology warrant reevaluation of the risk associated with anesthesia for diagnostic imaging. Although magnetic resonance imaging is the imaging modality of choice for children given the potentially harmful effects of computerized tomography-associated ionizing radiation, we dare to suggest that certain patients would benefit from the liberalization of our current standard. Incorporating the use of newer computerized tomography technology may improve safety for those that are already at higher risk for adverse events...
May 15, 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/28497774/evaluation-of-respiratory-and-postural-induced-changes-on-the-ballistocardiogram-signal-by-time-warping-averaging
#8
Alba Martin-Yebra, Federica Landreani, Claudia Casellato, Esteban Enrique Pavan, Pierre-François Migeotte, Carlo Frigo, Juan Martinez Cortes, Enrico Caiani
OBJECTIVE: The aim of this work was to evaluate the potential changes in the ballistocardiogram (BCG) signal induced by different respiratory patterns and posture, by using the dynamic time warping (DTW) technique. APPROACH: BCG signals were recorded in a group of 20 healthy volunteers, simultaneously to the ECG. Two recordings, one in supine (SUP) and one in standing (ST) position, including spontaneous breathing, two 1-minute apneas (at full and empty-lungs, respectively) and 30s of Valsalva, were analyzed...
May 12, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28497142/methyl-functionalized-mos2-nanosheets-with-reduced-lattice-breathing-for-enhanced-pseudocapacitive-sodium-storage
#9
Lei Huang, Qiulong Wei, Xiaoming Xu, Changwei Shi, Xue Liu, Liang Zhou, Liqiang Mai
Sodium ion batteries (SIBs) possess the potential to realize low-cost and large-scale energy storage due to the abundance of sodium. However, the large ionic radius of sodium often leads to sluggish kinetics and large volume change, limiting the further development of SIBs. Layered MoS2, with a large interlayer distance, is a promising intercalation anode material for SIBs. In this work, we report the synthesis of methyl-functionalized MoS2 (M-MoS2) nanosheets through a facile second solvothermal method. During the second solvothermal treatment, the pristine MoS2 is mostly converted from the 2H to 1T phase and the interlayer distance is expanded from 0...
May 12, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28495845/edmund-goodwyn-and-the-first-description-of-diving-bradycardia
#10
Jose L Vega
Diving bradycardia is a primordial oxygen-conserving reflex by which the heart rate of air-breathing vertebrates, including humans, slows down in response to water immersion. Its discovery is attributed to Paul Bert whose seminal observation was published in 1870 as part of a series of experiments that examined physiological adaptations to asphyxia in ducks and other animals. However, Edmund Goodwyn, a British physician who studied medicine at the University of Edinburgh had already published descriptions of this reflex in his doctoral thesis, which was originally published in Latin in 1786, and again in English in 1788...
May 11, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28494006/the-change-of-longitudinal-relaxation-rate-in-oxygen-enhanced-pulmonary-mri-depends-on-age-and-bmi-but-not-diffusing-capacity-of-carbon-monoxide-in-healthy-never-smokers
#11
Simon Sven Ivan Kindvall, Sandra Diaz, Jonas Svensson, Per Wollmer, Lars E Olsson
OBJECTIVE: Oxygen enhanced pulmonary MRI is a promising modality for functional lung studies and has been applied to a wide range of pulmonary conditions. The purpose of this study was to characterize the oxygen enhancement effect in the lungs of healthy, never-smokers, in light of a previously established relationship between oxygen enhancement and diffusing capacity of carbon monoxide in the lung (DL,CO) in patients with lung disease. METHODS: In 30 healthy never-smoking volunteers, an inversion recovery with gradient echo read-out (Snapshot-FLASH) was used to quantify the difference in longitudinal relaxation rate, while breathing air and 100% oxygen, ΔR1, at 1...
2017: PloS One
https://www.readbyqxmd.com/read/28492302/metal-organic-framework-templated-catalysts-dual-sensitization-of-pdo-zno-composite-on-hollow-sno2-nanotubes-for-selective-acetone-sensors
#12
Won-Tae Koo, Ji-Soo Jang, Seon-Jin Choi, Hee-Jin Cho, Il-Doo Kim
Metal-organic framework (MOF) derived synergistic catalysts were easily functionalized on hollow SnO2 nanotubes (NTs) via electrospinning and subsequent calcination. Nanoscale Pd NPs (~ 2 nm) loaded Zn based zeolite imidazole framework (Pd@ZIF-8, ~ 80 nm) was used as a new catalyst loading platform for effective functionalization of PdO@ZnO complex catalyst onto the thin wall of one-dimensional (1D) metal oxide NTs. The well-dispersed nanoscale PdO catalysts (3¬-4 nm) and multi-heterojunctions (PdO/ZnO and ZnO/SnO2) on hollow structures are essential for the development of high-performance gas sensors...
May 11, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28489009/-vanishing-lungs-a-case-report
#13
Thorunn Halldora Thordardottir, Arni Jon Geirsson, Sif Hansdottir
A 55 year old female with rheumatoid arthritis who was repeatedly admitted to internal medicine for fever, shortness of breath and pleuritic chest pain. Laboratory work up showed normal WBC but elevated CRP and sedimentatation rate. Cultures were negative. Imaging studies revealed elevated diaphragms, bilateral atelectasis and pleural fluid but normal lung parenchyma. Lung function testing showed restriction. Anti-dsDNA and anti-Ro/SSA were elevated. A clinical diagnosis of anti-TNF-induced lupus secondary to infliximab and shrinking lung syndrome was made...
May 2017: Læknablađiđ
https://www.readbyqxmd.com/read/28485457/a-wearable-strain-sensor-based-on-a-carbonized-nano-sponge-silicone-composite-for-human-motion-detection
#14
Xiao-Guang Yu, Yuan-Qing Li, Wei-Bin Zhu, Pei Huang, Tong-Tong Wang, Ning Hu, Shao-Yun Fu
Melamine sponge, also known as nano-sponge, is widely used as an abrasive cleaner in our daily life. In this work, the fabrication of a wearable strain sensor for human motion detection is first demonstrated with a commercially available nano-sponge as a starting material. The key resistance sensitive material in the wearable strain sensor is obtained by the encapsulation of a carbonized nano-sponge (CNS) with silicone resin. The as-fabricated CNS/silicone sensor is highly sensitive to strain with a maximum gauge factor of 18...
May 25, 2017: Nanoscale
https://www.readbyqxmd.com/read/28483998/hypoxia-treatment-reverses-neurodegenerative-disease-in-a-mouse-model-of-leigh-syndrome
#15
Michele Ferrari, Isha H Jain, Olga Goldberger, Emanuele Rezoagli, Robrecht Thoonen, Kai-Hung Chen, David E Sosnovik, Marielle Scherrer-Crosbie, Vamsi K Mootha, Warren M Zapol
The most common pediatric mitochondrial disease is Leigh syndrome, an episodic, subacute neurodegeneration that can lead to death within the first few years of life, for which there are no proven general therapies. Mice lacking the complex I subunit, Ndufs4, develop a fatal progressive encephalopathy resembling Leigh syndrome and die at ≈60 d of age. We previously reported that continuously breathing normobaric 11% O2 from an early age prevents neurological disease and dramatically improves survival in these mice...
May 23, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28482381/-nasal-continuous-positive-airway-pressure-ventilation-in-children-with-community-acquired-pneumonia-under-five-years-of-age-a-prospective-multi-center-clinical-study
#16
J Liu, Q Wang, S Y Qian, W M Xu, L L Li, L M Ning, X X Ren, F Lyu, Y B Cheng, L J Gao, C F Liu, W Xu, L Pei, G P Lu, W M Chen
Objective: To analyze the clinical characteristics of community-acquired pneumonia (CAP) in children under five years of age and analyze the safety and efficiency of nasal continuous positive airway pressure (NCPAP) ventilation for CAP in this population. Method: This was a prospective multicenter study. Children who were admitted to these six centers with CAP and met the NCPAP ventilation indications, aged from 29 d to 5 years, were continuously included during November 2013 to October 2015. The baseline data were collected and NCPAP ventilation were then followed up by operation standards, and the vital signs and arterial blood gas change at special time points were observed and recorded...
May 4, 2017: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/28480190/theoretical-diagnosis-of-emphysema-by-aerosol-bolus-inhalation
#17
Robert Sturm
BACKGROUND: The present contribution deals with the theoretical description of aerosol bolus dispersion in lungs being affected by different manifestations of emphysema. The work constructs the hypothesis that each manifestation of emphysema exhibits specific properties with regard to the dispersion of inhaled and exhaled aerosol boluses as well as the deposition of particles from the aerosol pulse. METHODS: For an appropriate simulation of single emphysematous manifestations, a previously developed model assuming (I) a random variation of alveolar diameters, (II) an exact localization of diseased structures, and (III) a realistic balance between alveolar air volume and number of air sacs was applied...
April 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28477378/evaluating-the-accuracy-of-4d-ct-ventilation-imaging-first-comparison-with-technegas-spect-ventilation
#18
Fiona Hegi-Johnson, Paul Keall, Jeff Barber, Chuong Bui, John Kipritidis
INTRODUCTION: Computed tomography ventilation imaging (CTVI) is a highly accessible functional lung imaging modality that can unlock the potential for functional avoidance in lung cancer radiation therapy. Previous attempts to validate CTVI against clinical ventilation single-photon emission computed tomography (V-SPECT) have been hindered by radioaerosol clumping artifacts. This work builds on those studies by performing the first comparison of CTVI with (99m) Tc-carbon ('Technegas'), a clinical V-SPECT modality featuring smaller radioaerosol particles with less clumping...
May 5, 2017: Medical Physics
https://www.readbyqxmd.com/read/28474866/the-effects-of-gymnastics-training-on-selected-parameters-of-anaerobic-capacity-in-12-year-old-boys
#19
Piotr Sawicki, Marcin Dornowski, Tomasz Grzywacz, Jan J Kaczor
BACKGROUND: One of the aims of the study was to describe the physiological factors of young boys participating in artistic gymnastic training and evaluate differences between the levels of aerobic and anaerobic efficiency in this group as compared to the control group. METHODS: The young male gymnasts selected to participate in the present study have been (G) participating in the training process since they were six years old (n=12, age 11-12 y). In the control group (n=12, age 11-12 y), boys were participating in physical education classes (C)...
April 26, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28474764/diameter-sensitive-breakdown-of-single-walled-carbon-nanotubes-in-koh-activation
#20
Jianglin Ye, Shuilin Wu, Kun Ni, Ziqi Tan, Jin Xu, Zhuchen Tao, Yanwu Zhu
While potassium hydroxide (KOH) activation has been used to create pores in carbon nanotubes (CNTs) for improved energy storage performance, the KOH activation mechanism of CNTs has been rarely investigated. In the work, the reaction between single-walled CNTs (SWCNTs) and KOH is studied in-situ with thermogravimetric analysis coupled to infrared spectrometry (IR) and gas chromatography/mass spectrometry (MS). The IR and MS results clearly demonstrate the sequential evolution of CO, hydrocarbons, CO2 and H2O in the activation process...
May 5, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
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