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https://www.readbyqxmd.com/read/29775438/breakdown-of-water-super-permeation-in-electrically-insulating-graphene-oxide-films-role-of-dual-interlayer-spacing
#1
M K Kavitha, Tushar Sakorikar, Pramitha V, Manu Jaiswal
Conventional graphene oxide is characterized by low sp<sup>2</sup> content in a sp<sup>3</sup> rich matrix, which is responsible both for electrical insulation and water super-permeation. Upon reduction, electrical conduction is achieved at the expense of water permeation ability. Here, we demonstrate that charge conduction and water permeation can be simultaneously restricted in a functionalized form of graphene oxide. Gravimetric studies reveal that diffusion of water vapour through glassy polymer membranes is arrested by loading hydrophobic form of GO in the polymer matrix, even as such water inhibition cannot be realized by substantially increasing the thickness of the bare polymer...
May 18, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29775083/comparing-efficacy-of-enteral-nutrition-plus-ranitidine-and-enteral-nutrition-alone-as-stress-ulcer-prophylaxis
#2
Anahid Nourian, Mostafa Mohammadi, Mohammad-Taghi Beigmohammadi, Mohammad Taher, Zohreh Dadvar, Masoume Malekolkottab, Masoud Ramezani, Hossein Khalili
AIM: Adequacy of enteral nutrition (EN) alone as stress ulcer prophylaxis (SUP) is controversial. The aim of this study was to compare efficacy of EN alone and ranitidine plus EN as SUP. METHOD: Critically ill adults with indications to receive SUP were randomized to ranitidine 50 mg IV every 8 h plus EN (SUP) or EN alone (non-SUP) group for 7 days. Besides, endoscopy was performed at the time of recruitment and on day 7. RESULTS: During the study period, only one patient in each group of SUP and non-SUP experienced gastrointestinal bleeding...
May 18, 2018: Journal of Comparative Effectiveness Research
https://www.readbyqxmd.com/read/29774669/obstructive-sleep-apnea-and-testosterone-deficiency
#3
REVIEW
Sung Dong Kim, Kyu Sup Cho
Obstructive sleep apnea (OSA) is a common disorder characterized by intermittent hypoxia and sleep fragmentation. OSA in middle-aged men is often associated with decreased testosterone secretion, together with obesity and aging. Although OSA treatment does not reliably increase testosterone levels in most studies, OSA treatment with testosterone replacement therapy (TRT) may not only improve hypogonadism, but can also alleviate erectile/sexual dysfunction. However, because TRT may exacerbate OSA in some patients, patients should be asked about OSA symptoms before and after starting TRT...
May 16, 2018: World Journal of Men's Health
https://www.readbyqxmd.com/read/29771733/haemodilution-and-head-down-tilting-induce-functional-injury-in-the-rat-optic-nerve-a-model-for-peri-operative-ischemic-optic-neuropathy
#4
Steven Roth, John Dreixler, Nancy J Newman
BACKGROUND: Mechanisms of peri-operative ischaemic optic neuropathy remain poorly understood. Both specific pre-operative and intra-operative factors have been examined by retrospective studies, but no animal model currently exists. OBJECTIVES: To develop a rodent model of peri-operative ischaemic optic neuropathy. In rats, we performed head-down tilt and/or haemodilution, theorising that the combination damages the optic nerve. DESIGN: Animal study...
May 15, 2018: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/29770777/shubnikov-de-haas-oscillations-in-i-p-i-and-i-n-i-type-topological-insulator-bi-sub-x-sub-sb-sub-1-x-sub-sub-2-sub-te-sub-3-sub
#5
Ryota Akiyama, Kazuki Sumida, Satoru Ichinokura, Ryosuke Nakanishi, Akio Kimura, Konstantin A Kokh, Oleg Tereshchenko, Shuji Hasegawa
We show Shubnikov-de Haas (SdH) oscillations in topological insulator (Bi<sub>x</sub>Sb<sub>1-x</sub>)<sub>2</sub>Te<sub>3</sub> flakes whose carrier types are <i>p</i>-type (<i>x</i> = 0.29, 0.34) and <i>n</i>-type (<i>x</i> = 0.42). The physical properties such as the Berry phase, carrier mobility, and scattering time significantly changed by tuning the Fermi-level position with the concentration <i>x</i>...
May 17, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29765882/relationship-between-functional-level-and-muscle-thickness-in-young-children-with-cerebral-palsy
#6
Yeo Reum Choe, Joo Sup Kim, Kee Hoon Kim, Tae Im Yi
Objective: To investigate the relationship between functional level and muscle thickness (MT) of the rectus femoris (RF) and the gastrocnemius (GCM) in young children with cerebral palsy (CP). Methods: The study participants were comprised of 26 children (50 legs) with spastic CP, aged 3-6 years, and 25 age-matched children with typical development (TD, 50 legs). The MT of the RF, medial GCM, and lateral GCM was measured with ultrasound imaging. The functional level was evaluated using the Gross Motor Function Measurement-88 (GMFM-88), Gross Motor Function Classification System (GMFCS), and based on the mobility area of the Korean version of the Modified Barthel Index (K-MBI)...
April 2018: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/29765875/clinical-and-biomechanical-effects-of-low-dye-taping-and-figure-8-modification-of-low-dye-taping-in-patients-with-heel-pad-atrophy
#7
You Hyeon Chae, Joo Sup Kim, Yeon Kang, Hyun Young Kim, Tae Im Yi
Objective: To investigate and compare the effect of low-dye taping (LDT) and figure-8 modification of LDT (MLDT) on peak plantar pressure and heel pain in patients with heel pad atrophy. Methods: There were reviewed 32 feet of 19 patients who have been diagnosed with heel pad atrophy who were enrolled in this study. The patients were diagnosed with heel pad atrophy with clinical findings, and loaded heel pad thickness measured by ultrasonography. At the first visit, patients were taught how to do LDT and MLDT...
April 2018: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/29764982/superman-regulates-floral-whorl-boundaries-through-control-of-auxin-biosynthesis
#8
Yifeng Xu, Nathanaël Prunet, Eng-Seng Gan, Yanbin Wang, Darragh Stewart, Frank Wellmer, Jiangbo Huang, Nobutoshi Yamaguchi, Yoshitaka Tatsumi, Mikiko Kojima, Takatoshi Kiba, Hitoshi Sakakibara, Thomas P Jack, Elliot M Meyerowitz, Toshiro Ito
Proper floral patterning, including the number and position of floral organs in most plant species, is tightly controlled by the precise regulation of the persistence and size of floral meristems (FMs). In Arabidopsis , two known feedback pathways, one composed of WUSCHEL (WUS) and CLAVATA3 (CLV3) and the other composed of AGAMOUS (AG) and WUS, spatially and temporally control floral stem cells, respectively. However, mounting evidence suggests that other factors, including phytohormones, are also involved in floral meristem regulation...
May 15, 2018: EMBO Journal
https://www.readbyqxmd.com/read/29763412/thermoacoustic-sound-projector-exceeding-the-fundamental-efficiency-of-carbon-nanotubes
#9
Ali E Aliev, Daniel Codoluto, Ray H Baughman, Raquel Ovalle-Robles, Kanzan Inoue, Stepan A Romanov, Albert Nasibulin, Prashant Kumar, Shashank Priya, Nathanael K Mayo, John Blottman
The combination of smooth, continuous sound spectra produced by a sound source having no vibrating parts, a nanoscale thickness of a flexible active layer and the feasibility of creating large, conformal projectors provoke interest in thermoacoustic phenomena. However, at low frequencies, the sound pressure level and the sound generation efficiency of open carbon nanotube sheets (CNTS) is low. In addition, the nanoscale thickness of fragile heating elements, their high sensitivity to the environment and the high surface temperatures practical for thermoacoustic sound generation necessitate a protective encapsulation of freestanding CNTS in inert gases...
May 15, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29762136/evaluation-of-a-clinical-tof-pet-detector-design-that-achieves-%C3%A2-100-ps-coincidence-time-resolution
#10
Joshua W Cates, Craig S Levin
Commercially available clinical positron emission tomography (PET) detectors employ scintillation crystals that are long (20 mm length) and narrow (4-5 mm width) optically coupled on their narrow end to a photosensor. The aspect ratio of this traditional crystal rod conguration and 511 keV photon attenuation properties yield signicant variances in scintillation light collection efficiency and transit time to the photodetector, due to variations in the 511 keV photon interaction depth in the crystal. These variances contribute significantly to coincidence time resolution degradation...
May 15, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29762135/surface-morphology-of-molybdenum-silicide-films-upon-low-energy-ion-beam-sputtering
#11
Raul Gago, Miriam Jaafar, Francisco Javier Palomares Simon
The surface morphology of molybdenum silicide (Mo<sub>x</sub>Si<sub>1-x </sub>) films has been studied after low-energy Ar<sup>+</sup> ion-beam sputtering (IBS) to explore eventual pattern formation on compound targets and, simultaneously, gather information about the mechanisms behind silicide-assisted nanopatterning of silicon surfaces by IBS. For this purpose, Mo<sub>x</sub>Si<sub>1-x </sub> films with compositions below, equal and above the MoSi<sub>2</sub> stoichiometry (x = 0...
May 15, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29762126/simple-and-efficient-lcao-basis-sets-for-the-diffuse-states-in-carbon-nanostructures
#12
Nick Rübner Papior, Gaetano Calogero, Mads Brandbyge
We present a simple way to describe the lowest unoccupied diffuse states in carbon nanostructures
 in density functional theory (DFT) calculations using a minimal LCAO (linear combination
 of atomic orbitals) basis set. 
 By comparing plane wave basis calculations, we show how
 these states can be captured by adding long-range orbitals
 to the standard LCAO basis sets for the extreme 
 cases of planar <i>sp</i><sup>2</sup> (graphene) and curved carbon (C<sub>60</sub>)...
May 15, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29762033/isolation-synthesis-and-antisepsis-effects-of-a-c-methylcoumarinochromone-isolated-from-abronia-nana-cell-culture
#13
Wonhwa Lee, Doohyun Lee, Yuri Lee, Taeho Lee, Kyung-Sik Song, Eun-Ju Yang, Jong-Sup Bae
Only a few isoflavones have been isolated from plants of the genus Abronia. The biological properties of compounds isolated from Abronia species have not been well established, and their antisepsis effects have not been reported yet. In the present study, a new C-methylcoumarinochromone, was isolated from Abronia nana suspension cultures. Its structure was deduced as 9,11-dihydroxy-10-methylcoumarinochromone (boeravinone Y, 1) by spectroscopic data analysis and verified by chemical synthesis. The potential inhibitory effects of 1 against high mobility group box 1 (HMGB1)-mediated septic responses were investigated...
May 15, 2018: Journal of Natural Products
https://www.readbyqxmd.com/read/29761482/timing-of-onset-of-gastrointestinal-bleeding-in-the-icu-protocol-for-a-preplanned-observational-study
#14
A Granholm, T Lange, C T Anthon, S Marker, M Krag, T S Meyhoff, M P Wise, M Borthwick, S Bendel, F Keus, A B Guttormsen, J C Schefold, J Wetterslev, A Perner, M H Møller
BACKGROUND: Critically ill patients are at risk of gastrointestinal bleeding, but clinically important gastrointestinal bleeding is rare. The majority of intensive care unit (ICU) patients receive stress ulcer prophylaxis (SUP), despite uncertainty concerning the balance between benefit and harm. For approximately half of ICU patients with gastrointestinal bleeding, onset is early, ie within the first two days of the ICU stay. The aetiology of gastrointestinal bleeding and consequently the balance between benefit and harm of SUP may differ between patients with early vs late gastrointestinal bleeding...
May 14, 2018: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/29760606/influence-of-major-coping-strategies-on-treatment-non-adherence-and-severity-of-comorbid-conditions-in-hemodialysis-patients
#15
Hyun Chan Hwang, Hye Ri Kim, Doug Hyun Han, Ji Sun Hong, So-Hee Jeong, Jung-Ho Shin, Su-Hyun Kim, Jin Ho Hwang, Sun Mi Kim
Background: Non-adherence and comorbidities are prevalent among hemodialysis patients and are associated with increased mortality and financial burden. We aimed to investigate the influence of major coping strategies (CSs) on non-adherence and comorbidities in hemodialysis patients. Methods: A total of 49 patients were enrolled. We collected participant data including CS measured by a Korean version of the ways of coping questionnaire (K-WCQ), comorbidities measured by age-adjusted Charlson comorbidity index (CCI), and adherence measured by the 8-item Morisky medication adherence scale (MMAS-8)...
May 14, 2018: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/29758993/lower-in-hospital-ventricular-tachyarrhythmia-in-patients-with-acute-myocardial-infarction-receiving-prior-statin-therapy
#16
Jin Sup Park, Bo Won Kim, Taek Jong Hong, Jeong Cheon Choe, Hye Won Lee, Jun-Hyok Oh, Jung Hyun Choi, Han Cheol Lee, Kwang Soo Cha, Myung Ho Jeong
We evaluated whether prior statin therapy reduces in-hospital ventricular tachycardia/ventricular fibrillation (VT/VF) in percutaneous coronary intervention (PCI) patients with acute myocardial infarction (MI). Among the 1177 patients from the Acute Myocardial Infarction Registry-National Institutes of Health (KAMIR-NIH), 823 (70%) patients received prior statin therapy. Prior statin therapy was associated with a reduced risk of VT/VF events in both adjusted propensity score analysis (odds ratio [OR] 0.414, 95% confidence interval [CI], 0...
January 1, 2018: Angiology
https://www.readbyqxmd.com/read/29757622/iron-vacancies-accommodate-uranyl-incorporation-into-hematite
#17
Martin E McBriarty, Sebastien Kerisit, Eric J Bylaska, Samuel Shaw, Katherine Morris, Eugene S Ilton
Radiotoxic uranium contamination in natural systems and nuclear waste containment can be sequestered by incorporation into naturally abundant iron (oxyhydr)oxides such as hematite (α-Fe<sub>2</sub>O<sub>3</sub>) during mineral growth. The stability and properties of the resulting uranium-doped material are impacted by the local coordination environment of incorporated uranium. While measurements of uranium coordination in hematite have been attempted using extended X-ray absorption fine structure (EXAFS) analysis, traditional shell-by-shell EXAFS fitting yields ambiguous results...
May 14, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29757159/sawtooth-structure-formation-under-nonlinear-regime-ion-bombardment
#18
Joy Clare Perkinson, Jennifer M Swenson, Alexander DeMasi, Christa Wagenbach, Karl F Ludwig, Scott A Norris, Michael J Aziz
Linear-regime Ar&lt;sup&gt;+&lt;/sup&gt; bombardment of Si produces symmetrical ripple structures at ion incidence angles above 45&lt;sup&gt;○&lt;/sup&gt; measured off-normal [1]. In the nonlinear regime, new behaviors emerge. In this paper, we present experimental results of ion bombardment that continues into the nonlinear regime until pattern saturation at multiple ion incidence angles, showing the evolution of their grazing incidence small-angle x-ray scattering (GISAXS) spectra as well as atomic force microscopy (AFM) topographs of the final, saturated structures...
May 14, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29756534/neurostimulant-prescribing-patterns-in-children-admitted-to-the-icu-after-traumatic-brain-injury
#19
Amanda Marie Morrison, Amy Houtrow, James Zullo, Patrick M Kochanek, Carol Vetterly, Ericka L Fink
Neurostimulant medications are commonly prescribed following traumatic brain injury (TBI) in adults; little is known about their use in children with TBI. Our objective was to analyze neurostimulant prescribing practices from 2005 to 2015 in children admitted to the intensive care unit (ICU) with TBI. We hypothesized that neurostimulant prescriptions have increased over time and are associated with older age and injury severity. A retrospective cohort study of patients aged 1 month to 18 years with an ICD-9-CM discharge diagnosis code for TBI admitted to the ICU between 2005 and 2015 in 37 pediatric hospitals included in the Pediatric Health Information System was conducted...
May 14, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29749964/peculiar-phase-diagram-with-isolated-superconducting-regions-in-thfeasn-sub-1-i-x-i-sub-o-sub-i-x-i-sub
#20
Bai-Zhuo Li, Zhi-Cheng Wang, Jia-Lu Wang, Fu-Xiang Zhang, Dong-Ze Wang, Feng-Yuan Zhang, Yu-Ping Sun, Qiang Jing, Hua-Fu Zhang, Shugang Tan, Y K Li, Chun-Mu Feng, Yu-Xue Mei, Cao Wang, Guanghan Cao
ThFeAsN&lt;sub&gt;1-&lt;i&gt;x&lt;/i&gt;&lt;/sub&gt;O&lt;sub&gt;&lt;i&gt;x&lt;/i&gt;&lt;/sub&gt; (0≤&lt;i&gt;x&lt;/i&gt;≤0.6) system with heavy electron doping has been studied by the measurements of X-ray diffraction, electrical resistivity, magnetic susceptibility and specific heat. The non-doped compound exhibits superconductivity at &lt;i&gt;T&lt;sub&gt;c&lt;/sub&gt;&lt;sup&gt;onset&lt;/sup&gt;&lt;/i&gt;=30 K, which is possibly due to an internal uniaxial chemical pressure that is manifested by the extremely small value of As height with respect to the Fe plane...
May 11, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
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