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https://www.readbyqxmd.com/read/27933562/authors-reply-to-anoop-balachandran-et-al-comment-on-sub-anesthetic-xenon-increases-erythropoietin-levels-in-humans-a-randomized-controlled-trial
#1
EDITORIAL
Christian Stoppe, Julia Ney, Rolf Rossaint, Mark Coburn, Andreas Goetzenich
No abstract text is available yet for this article.
December 9, 2016: Sports Medicine
https://www.readbyqxmd.com/read/27911934/efficacy-of-noninvasive-stellate-ganglion-blockade-performed-using-physical-agent-modalities-in-patients-with-sympathetic-hyperactivity-associated-disorders-a-systematic-review-and-meta-analysis
#2
Chun-De Liao, Jau-Yih Tsauo, Tsan-Hon Liou, Hung-Chou Chen, Chi-Lun Rau
BACKGROUND: Stellate ganglion blockade (SGB) is mainly used to relieve symptoms of neuropathic pain in conditions such as complex regional pain syndrome and has several potential complications. Noninvasive SGB performed using physical agent modalities (PAMs), such as light irradiation and electrical stimulation, can be clinically used as an alternative to conventional invasive SGB. However, its application protocols vary and its clinical efficacy remains controversial. This study investigated the use of noninvasive SGB for managing neuropathic pain or other disorders associated with sympathetic hyperactivity...
2016: PloS One
https://www.readbyqxmd.com/read/27910642/novel-xenon-calibration-scheme-for-two-photon-absorption-laser-induced-fluorescence-of-hydrogen
#3
Drew Elliott, Earl Scime, Zachary Short
Two photon absorption laser induced fluorescence (TALIF) measurements of neutral hydrogen and its isotopes are typically calibrated by performing TALIF measurements on krypton with the same diagnostic system and using the known ratio of the absorption cross sections [K. Niemi et al., J. Phys. D 34, 2330 (2001)]. Here we present the measurements of a new calibration method based on a ground state xenon scheme for which the fluorescent emission wavelength is nearly identical to that of hydrogen, thereby eliminating chromatic effects in the collection optics and simplifying detector calibration...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910437/design-calculations-for-a-xenon-plasma-x-ray-shield-to-protect-the-nif-optical-thomson-scattering-diagnostic
#4
G F Swadling, J S Ross, P Datte, J Moody, L Divol, O Jones, O Landen
An Optical Thomson Scattering (OTS) diagnostic is currently being developed for the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory. This diagnostic is designed to make measurements of the hohlraum plasma parameters, such as the electron temperature and the density, during inertial confinement fusion (ICF) experiments. NIF ICF experiments present a very challenging environment for optical measurements; by their very nature, hohlraums produce intense soft x-ray emission, which can cause "blanking" (radiation induced opacity) of the radiation facing optical components...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27906765/hemodynamic-disturbances-in-the-early-phase-after-subarachnoid-hemorrhage-regional-cerebral-blood-flow-studied-by-bedside-xenon-enhanced-ct
#5
Henrik Engquist, Anders Lewén, Tim Howells, Ulf Johnson, Elisabeth Ronne-Engström, Pelle Nilsson, Per Enblad, Elham Rostami
BACKGROUND: The mechanisms leading to neurological deterioration and the devastating course of delayed cerebral ischemia (DCI) after subarachnoid hemorrhage (SAH) are still not well understood. Bedside xenon-enhanced computerized tomography (XeCT) enables measurements of regional cerebral blood flow (rCBF) during neurosurgical intensive care. In the present study, CBF characteristics in the early phase after severe SAH were explored and related to clinical characteristics and early clinical course outcome...
November 30, 2016: Journal of Neurosurgical Anesthesiology
https://www.readbyqxmd.com/read/27901015/laser-induced-phase-separation-of-silicon-carbide
#6
Insung Choi, Hu Young Jeong, Hyeyoung Shin, Gyeongwon Kang, Myunghwan Byun, Hyungjun Kim, Adrian M Chitu, James S Im, Rodney S Ruoff, Sung-Yool Choi, Keon Jae Lee
Understanding the phase separation mechanism of solid-state binary compounds induced by laser-material interaction is a challenge because of the complexity of the compound materials and short processing times. Here we present xenon chloride excimer laser-induced melt-mediated phase separation and surface reconstruction of single-crystal silicon carbide and study this process by high-resolution transmission electron microscopy and a time-resolved reflectance method. A single-pulse laser irradiation triggers melting of the silicon carbide surface, resulting in a phase separation into a disordered carbon layer with partially graphitic domains (∼2...
November 30, 2016: Nature Communications
https://www.readbyqxmd.com/read/27896446/biocompatible-silver-nanoparticles-prepared-with-amino-acids-and-a-green-method
#7
Ricardo Almeida de Matos, Lilia Coronato Courrol
The synthesis of nanoparticles is usually carried out by chemical reduction, which is effective but uses many toxic substances, making the process potentially harmful to the environment. Hence, as part of the search for environmentally friendly or green synthetic methods, this study aimed to produce silver nanoparticles (AgNPs) using only AgNO3, Milli-Q water, white light from a xenon lamp (Xe) and amino acids. Nanoparticles were synthetized using 21 amino acids, and the shapes and sizes of the resultant nanoparticles were evaluated...
November 28, 2016: Amino Acids
https://www.readbyqxmd.com/read/27882425/assessment-of-regional-emphysema-air-trapping-and-xenon-ventilation-using-dual-energy-computed-tomography-in-chronic-obstructive-pulmonary-disease-patients
#8
Sang Min Lee, Joon Beom Seo, Hye Jeon Hwang, Namkug Kim, Sang Young Oh, Jae Seung Lee, Sei Won Lee, Yeon-Mok Oh, Tae Hoon Kim
OBJECTIVES: To compare the parenchymal attenuation change between inspiration/expiration CTs with dynamic ventilation change between xenon wash-in (WI) inspiration and wash-out (WO) expiration CTs. METHODS: 52 prospectively enrolled COPD patients underwent xenon ventilation dual-energy CT during WI and WO periods and pulmonary function tests (PFTs). The parenchymal attenuation parameters (emphysema index (EI), gas-trapping index (GTI) and air-trapping index (ATI)) and xenon ventilation parameters (xenon in WI (Xe-WI), xenon in WO (Xe-WO) and xenon dynamic (Xe-Dyna)) of whole lung and three divided areas (emphysema, hyperinflation and normal) were calculated on virtual non-contrast images and ventilation images...
November 23, 2016: European Radiology
https://www.readbyqxmd.com/read/27881838/fabrication-of-ion-shaped-anisotropic-nanoparticles-and-their-orientational-imaging-by-second-harmonic-generation-microscopy
#9
Abdallah Slablab, Tero J Isotalo, Jouni Mäkitalo, Léo Turquet, Pierre-Eugène Coulon, Tapio Niemi, Christian Ulysse, Mathieu Kociak, Dominique Mailly, Giancarlo Rizza, Martti Kauranen
Ion beam shaping is a novel and powerful tool to engineer nanocomposites with effective three-dimensional (3D) architectures. In particular, this technique offers the possibility to precisely control the size, shape and 3D orientation of metallic nanoparticles at the nanometer scale while keeping the particle volume constant. Here, we use swift heavy ions of xenon for irradiation in order to successfully fabricate nanocomposites consisting of anisotropic gold nanoparticle that are oriented in 3D and embedded in silica matrix...
November 24, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27875871/remote-detection-of-hyperpolarized-129-xe-resonances-via-multiple-distant-dipolar-field-interactions-with-1-h
#10
Le Zhang, Michael Antonacci, Alex Burant, Karl M Koshlap, Rosa Tamara Branca
A remote detection scheme utilizing the distant dipolar field interaction between two different spin species was proposed by Granwehr et al. [J. Magn. Reson. 176(2), 125 (2005)]. In that sequence (1)H spins were detected indirectly via their dipolar field interaction with (129)Xe spins, which served as the sensing spins. Here we propose a modification of the proposed detection scheme that takes advantage of the longer T1 relaxation time of xenon to create a long lasting dipolar field with which the fast relaxing (1)H spins are allowed to interact many times during a single acquisition...
November 21, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27867480/xenon-protects-left-ventricular-diastolic-function-during-acute-ischemia-less-than-ischemic-preconditioning
#11
Jan-H Baumert, Anna B Roehl, Sandra Funcke, Marc Hein
Anesthetics modify regional left ventricular (LV) dysfunction following ischemia/reperfusion but their effects on global function in this setting are less clear. Aim of this study was to test the hypothesis that xenon would limit global LV dysfunction as caused by acute anterior wall ischemia, comparable to ischemic preconditioning. In an open-chest model under thiopental anesthesia, 30 pigs underwent 60-minute left anterior descending coronary artery occlusion, followed by 120 minutes of reperfusion. A xenon group (constant inhalation from previous to ischemia through end of reperfusion) was compared to control and ischemic preconditioning...
July 2016: Medical Gas Research
https://www.readbyqxmd.com/read/27862780/instantaneous-functionalization-of-chemically-etched-silicon-nanocrystal-surfaces
#12
Md Hosnay Mobarok, Tapas K Purkait, Muhammad Amirul Islam, Mark Miskolzie, Jonathan G C Veinot
Remarkable advances in surface hydrosilylation reactions of C=C and C=O bonds on hydride-terminated silicon have revolutionized silicon surface functionalization. However, existing methods for functionalizing hydride-terminated Si nanocrystals (H-SiNCs) require long reaction times and elevated temperatures. Herein, we report a room-temperature method for functionalizing H-SiNC surfaces within seconds by stripping outermost atoms on H-SiNC surfaces with xenon difluoride (XeF2 ). Detailed analysis of the reaction byproducts by in situ NMR spectroscopy and GC-MS provided unprecedented insight into NC surface composition and reactivity as well as the complex reaction mechanism of XeF2 activated hydrosilylation...
November 11, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27830959/neonatal-hypoxic-ischemic-encephalopathy-an-update-on-disease-pathogenesis-and-treatment
#13
Edibe Pembegül Yıldız, Barış Ekici, Burak Tatlı
Hypoxic ischemic encephalopathy (HIE) is the most important reason for morbidity and mortality in term-born infants. Understanding pathophysiology of the brain damage is essential for the early detection of patients with high risk for HIE and development of strategies for their treatments. Areas covered: This review discusses pathophysiology of the neonatal HIE and its treatment options, including hypothermia, melatonin, allopurinol, topiramate, erythropoietin, N-acetylcyctein, magnesium sulphate and xenon...
November 10, 2016: Expert Review of Neurotherapeutics
https://www.readbyqxmd.com/read/27826419/gas-transport-during-in-vitro-and-in-vivo-preclinical-testing-of-inert-gas-therapies
#14
Ira Katz, Marc Palgen, Jacqueline Murdock, Andrew R Martin, Géraldine Farjot, Georges Caillibotte
New gas therapies using inert gases such as xenon and argon are being studied, which require in vitro and in vivo preclinical experiments. Examples of the kinetics of gas transport during such experiments are analyzed in this paper. Using analytical and numerical models, we analyze an in vitro experiment for gas transport to a 96 cell well plate and an in vivo delivery to a small animal chamber, where the key processes considered are the wash-in of test gas into an apparatus dead volume, the diffusion of test gas through the liquid media in a well of a cell test plate, and the pharmacokinetics in a rat...
March 2016: Medical Gas Research
https://www.readbyqxmd.com/read/27825066/diffusion-mediated-129-xe-gas-depolarization-in-magnetic-field-gradients-during-continuous-flow-optical-pumping
#15
Alex Burant, Rosa Tamara Branca
The production of large volumes of highly polarized noble gases like helium and xenon is vital to applications of magnetic resonance imaging and spectroscopy with hyperpolarized (HP) gas in humans. In the past ten years, (129)Xe has become the gas of choice due to its lower cost, higher availability, relatively high tissue solubility, and wide range of chemical shift values. Though near unity levels of xenon polarization have been achieved in-cell using stopped-flow Spin Exchange Optical Pumping (SEOP), these levels are currently unmatched by continuous-flow SEOP methods...
December 2016: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/27823993/nanoscale-shape-mediated-coupling-between-temperature-and-densification-in-intense-pulsed-light-sintering
#16
S Bansal, R Malhotra
In intense pulsed light sintering (IPL), pulsed large-area visible light from a xenon lamp is absorbed by nanoparticle films or patterns and converted to heat, resulting in rapid sintering of the nanoparticles. This work experimentally characterizes IPL of silver nanoparticle films. A newly observed turning point in the evolution of film temperature during IPL is correlated to the observation, in literature and in this work, that film densification levels off beyond a critical pulse fluence and number of pulses...
November 8, 2016: Nanotechnology
https://www.readbyqxmd.com/read/27805699/mid-infrared-supercontinuum-generation-in-supercritical-xenon-filled-hollow-core-negative-curvature-fibers
#17
Md Imran Hasan, Nail Akhmediev, Wonkeun Chang
We present an investigation on the generation of supercontinuum in the mid-infrared (mid-IR) spectral region. Namely, we study a silica-based anti-resonant hollow-core fiber which has good guidance properties in the mid-IR filled with supercritical xenon providing the necessary high nonlinearity. Our numerical study shows that by launching a 200 nJ pump of 100 fs centered at 3.70 μm, a supercontinuum that spans from 1.85 to 5.20 μm can be generated. Such sources are potentially useful for applications, such as the remote sensing of various molecules, medical imaging diagnosis, and surgery...
November 1, 2016: Optics Letters
https://www.readbyqxmd.com/read/27804925/multiple-energy-synchrotron-biomedical-imaging-system
#18
B Bassey, M Martinson, N Samadi, G Belev, C Karanfil, P Qi, D Chapman
A multiple energy imaging system that can extract multiple endogenous or induced contrast materials as well as water and bone images would be ideal for imaging of biological subjects. The continuous spectrum available from synchrotron light facilities provides a nearly perfect source for multiple energy x-ray imaging. A novel multiple energy x-ray imaging system, which prepares a horizontally focused polychromatic x-ray beam, has been developed at the BioMedical Imaging and Therapy bend magnet beamline at the Canadian Light Source...
November 2, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27778170/fluorescent-incisionless-cholangiography-as-a-teaching-tool-for-identification-of-calot-s-triangle
#19
Mayank Roy, Fernando Dip, David Nguyen, Conrad H Simpfendorfer, Emanuele Lo Menzo, Samuel Szomstein, Raul J Rosenthal
BACKGROUND: Intraoperative incisionless fluorescent cholangiogram (IOIFC) has been demonstrated to be a useful tool to increase the visualization of Calot's triangle. This study evaluates the identification of extrahepatic biliary structures with IOIFC by medical students and surgery residents. METHODS: Two pictures were taken, one with xenon light and one with near-infrared (NIR) light, at the same stage during dissection of Calot's triangle in ten different cases of laparoscopic cholecystectomy (LC)...
October 24, 2016: Surgical Endoscopy
https://www.readbyqxmd.com/read/27776206/unexpected-trend-in-stability-of-xe-f-compounds-under-pressure-driven-by-xe-xe-covalent-bonds
#20
Feng Peng, Jorge Botana, Yanchao Wang, Yanming Ma, Maosheng Miao
Xenon difluoride is the first and the most stable of hundreds of noble-gas (Ng) compounds. These compounds reveal the rich chemistry of Ng's. No stable compound that contains a Ng-Ng bond has been reported previously. Recent experiments have shown intriguing behaviors of this exemplar compound under high pressure, including increased coordination numbers and an insulator-to-metal transition. None of the behaviors can be explained by electronic-structure calculations with fixed stoichiometry. We therefore conducted a structure search of xenon-fluorine compounds with various stoichiometries and studied their stabilities under pressure using first-principles calculations...
November 1, 2016: Journal of Physical Chemistry Letters
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