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https://www.readbyqxmd.com/read/28780338/facile-functionalization-of-cotton-with-nanostructured-silver-titania-for-visible-light-plasmonic-photocatalysis
#1
Marwa Abid, Soraa Bouattour, Ana M Ferraria, David S Conceição, Ana P Carapeto, Luís F Vieira Ferreira, Ana M Botelho do Rego, Mohamed M Chehimi, Manuel Rei Vilar, Sami Boufi
In the present work, a simple, reliable and cost-effective approach to functionalize cotton fabrics with Ag-TiO2 nanoparticles strongly bound to the fibres and with visible-light-responsive photo-activity is presented. The hybrid cotton-Ag-TiO2 fabrics were characterized by Raman, AFM, FE-SEM, TGA, XPS GSDR, and LIL to confirm the generation of metallic Ag nanoparticles and crystalline TiO2 and investigate how the concentration of Ag and TiO2 precursors affected the morphology and the luminescence properties of the nanostructured layer grafted on the cotton fibres...
July 29, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28762185/consideration-of-the-intracranial-pressure-threshold-value-for-the-initiation-of-traumatic-brain-injury-treatment-a-xenon-ct-and-perfusion-ct-study
#2
Mitsuru Honda, Ryo Ichibayashi, Ginga Suzuki, Hiroki Yokomuro, Yoshikatsu Seiki, Shigeru Sase, Taichi Kishi
BACKGROUND: Monitoring of intracranial pressure (ICP) is considered to be fundamental for the care of patients with severe traumatic brain injury (TBI) and is routinely used to direct medical and surgical therapy. Accordingly, some guidelines for the management of severe TBI recommend that treatment be initiated for ICP values >20 mmHg. However, it remained to be accounted whether there is a scientific basis to this instruction. The purpose of the present study was to clarify whether the basis of ICP values >20 mmHg is appropriate...
July 31, 2017: Neurocritical Care
https://www.readbyqxmd.com/read/28745443/discrimination-between-patients-with-mild-alzheimer-s-disease-and-healthy-subjects-based-on-cerebral-blood-flow-images-of-the-lateral-views-in-xenon-enhanced-computed-tomography
#3
Shigeru Sase, Homaro Yamamoto, Ena Kawashima, Xin Tan, Yutaka Sawa
BACKGROUND: Quantitative cerebral blood flow (CBF) measurement is expected to help early detection of functional abnormalities caused by Alzheimer's disease (AD) and enable AD treatment to begin in its early stages. Recently, a technique of layer analysis was reported that allowed CBF to be analyzed from the outer to inner layers of the brain. The aim of this work was to develop methods for discriminating between patients with mild AD and healthy subjects based on CBF images of the lateral views created with the layer analysis technique in xenon-enhanced computed tomography...
July 26, 2017: Psychogeriatrics: the Official Journal of the Japanese Psychogeriatric Society
https://www.readbyqxmd.com/read/28743410/low-level-laboratory-measurement-of-xenon-radionuclides-electron-photon-versus-photon-measurements
#4
O Delaune, A Cagniant, P Gross, G Douysset, J-P Fontaine, G Le Petit
Radioactive xenon (mainly (131m)Xe, (133)Xe, (133m)Xe and (135)Xe) are tracked as markers of nuclear weapons testing. The CEA has developed the PIPSBox, a measurement cell able to detect electrons emitted by xenon nuclides. Combined with an ultra-low background γ spectrometer, electron detection capacities allow reaching minimum detectable activities (MDA) for a 3-day long measurement of about 0.5mBq for the four xenon radionuclides. Compared to a classical measurement cell, MDAs are improved by a factor of 2-4...
July 13, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28734299/state-of-the-art-ab-initio-potential-energy-curve-for-the-xenon-atom-pair-and-related-spectroscopic-and-thermophysical-properties
#5
Robert Hellmann, Benjamin Jäger, Eckard Bich
A new ab initio interatomic potential energy curve for two ground-state xenon atoms is presented. It is based on supermolecular calculations at the coupled-cluster level with single, double, and perturbative triple excitations [CCSD(T)] employing basis sets up to sextuple-zeta quality, which were developed as part of this work. In addition, corrections were determined for higher coupled-cluster levels up to CCSDTQ as well as for scalar and spin-orbit relativistic effects at the CCSD(T) level. A physically motivated analytical function was fitted to the calculated interaction energies and used to compute the vibrational spectrum of the dimer, the second virial coefficient, and the dilute gas transport properties...
July 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28728873/inactivation-of-alicyclobacillus-acidoterrestris-atcc-49025-spores-in-apple-juice-by-pulsed-light-influence-of-initial-contamination-and-required-reduction-levels
#6
Mariana I Ferrario, Sandra N Guerrero
The purpose of this study was to analyze the response of different initial contamination levels of Alicyclobacillus acidoterrestris ATCC 49025 spores in apple juice as affected by pulsed light treatment (PL, batch mode, xenon lamp, 3pulses/s, 0-71.6J/cm(2)). Biphasic and Weibull frequency distribution models were used to characterize the relationship between inoculum size and treatment time with the reductions achieved after PL exposure. Additionally, a second order polynomial model was computed to relate required PL processing time to inoculum size and requested log reductions...
July 17, 2017: Revista Argentina de Microbiología
https://www.readbyqxmd.com/read/28719609/renal-function-following-xenon-anesthesia-for-partial-nephrectomy-an-explorative-analysis-of-a-randomized-controlled-study
#7
Ana Stevanovic, Patrick Schaefer, Mark Coburn, Rolf Rossaint, Christian Stoppe, Peter Boor, David Pfister, Axel Heidenreich, Hildegard Christ, Martin Hellmich, Astrid V Fahlenkamp
BACKGROUND: Perioperative preservation of renal function has a significant impact on morbidity and mortality in kidney surgery. Nephroprotective effects of the anesthetic xenon on ischemia-reperfusion injury were found in several experimental studies. OBJECTIVE: We aimed to explore whether xenon anesthesia can reduce renal damage in humans undergoing partial nephrectomy and to gather pilot data of possible nephroprotection in these patients. DESIGN: A prospective randomized, single-blinded, controlled study...
2017: PloS One
https://www.readbyqxmd.com/read/28707937/first-searches-for-axions-and-axionlike-particles-with-the-lux-experiment
#8
D S Akerib, S Alsum, C Aquino, H M Araújo, X Bai, A J Bailey, J Balajthy, P Beltrame, E P Bernard, A Bernstein, T P Biesiadzinski, E M Boulton, P Brás, D Byram, S B Cahn, M C Carmona-Benitez, C Chan, A A Chiller, C Chiller, A Currie, J E Cutter, T J R Davison, A Dobi, J E Y Dobson, E Druszkiewicz, B N Edwards, C H Faham, S R Fallon, S Fiorucci, R J Gaitskell, V M Gehman, C Ghag, K R Gibson, M G D Gilchriese, C R Hall, M Hanhardt, S J Haselschwardt, S A Hertel, D P Hogan, M Horn, D Q Huang, C M Ignarra, R G Jacobsen, W Ji, K Kamdin, K Kazkaz, D Khaitan, R Knoche, N A Larsen, C Lee, B G Lenardo, K T Lesko, A Lindote, M I Lopes, A Manalaysay, R L Mannino, M F Marzioni, D N McKinsey, D-M Mei, J Mock, M Moongweluwan, J A Morad, A St J Murphy, C Nehrkorn, H N Nelson, F Neves, K O'Sullivan, K C Oliver-Mallory, K J Palladino, E K Pease, L Reichhart, C Rhyne, S Shaw, T A Shutt, C Silva, M Solmaz, V N Solovov, P Sorensen, S Stephenson, T J Sumner, M Szydagis, D J Taylor, W C Taylor, B P Tennyson, P A Terman, D R Tiedt, W H To, M Tripathi, L Tvrznikova, S Uvarov, V Velan, J R Verbus, R C Webb, J T White, T J Whitis, M S Witherell, F L H Wolfs, J Xu, K Yazdani, S K Young, C Zhang
The first searches for axions and axionlike particles with the Large Underground Xenon experiment are presented. Under the assumption of an axioelectric interaction in xenon, the coupling constant between axions and electrons g_{Ae} is tested using data collected in 2013 with an exposure totaling 95 live days ×118  kg. A double-sided, profile likelihood ratio statistic test excludes g_{Ae} larger than 3.5×10^{-12} (90% C.L.) for solar axions. Assuming the Dine-Fischler-Srednicki-Zhitnitsky theoretical description, the upper limit in coupling corresponds to an upper limit on axion mass of 0...
June 30, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28696768/limits-on-spin-dependent-wimp-nucleon-cross-section-obtained-from-the-complete-lux-exposure
#9
D S Akerib, S Alsum, H M Araújo, X Bai, A J Bailey, J Balajthy, P Beltrame, E P Bernard, A Bernstein, T P Biesiadzinski, E M Boulton, P Brás, D Byram, S B Cahn, M C Carmona-Benitez, C Chan, A A Chiller, C Chiller, A Currie, J E Cutter, T J R Davison, A Dobi, J E Y Dobson, E Druszkiewicz, B N Edwards, C H Faham, S R Fallon, S Fiorucci, R J Gaitskell, V M Gehman, C Ghag, M G D Gilchriese, C R Hall, M Hanhardt, S J Haselschwardt, S A Hertel, D P Hogan, M Horn, D Q Huang, C M Ignarra, R G Jacobsen, W Ji, K Kamdin, K Kazkaz, D Khaitan, R Knoche, N A Larsen, C Lee, B G Lenardo, K T Lesko, A Lindote, M I Lopes, A Manalaysay, R L Mannino, M F Marzioni, D N McKinsey, D-M Mei, J Mock, M Moongweluwan, J A Morad, A St J Murphy, C Nehrkorn, H N Nelson, F Neves, K O'Sullivan, K C Oliver-Mallory, K J Palladino, E K Pease, L Reichhart, C Rhyne, S Shaw, T A Shutt, C Silva, M Solmaz, V N Solovov, P Sorensen, S Stephenson, T J Sumner, M Szydagis, D J Taylor, W C Taylor, B P Tennyson, P A Terman, D R Tiedt, W H To, M Tripathi, L Tvrznikova, S Uvarov, V Velan, J R Verbus, R C Webb, J T White, T J Whitis, M S Witherell, F L H Wolfs, J Xu, K Yazdani, S K Young, C Zhang
We present experimental constraints on the spin-dependent WIMP-nucleon elastic cross sections from the total 129.5  kg yr exposure acquired by the Large Underground Xenon experiment (LUX), operating at the Sanford Underground Research Facility in Lead, South Dakota (USA). A profile likelihood ratio analysis allows 90% C.L. upper limits to be set on the WIMP-neutron (WIMP-proton) cross section of σ_{n}=1.6×10^{-41}  cm^{2} (σ_{p}=5×10^{-40}  cm^{2}) at 35  GeV c^{-2}, almost a sixfold improvement over the previous LUX spin-dependent results...
June 23, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28688733/spalax-ng-a-breakthrough-in-radioxenon-field-measurement
#10
A Cagniant, S Topin, G Le Petit, P Gross, O Delaune, T Philippe, G Douysset
Lessons-learned from 10 years of noble gas stations operation and dedicated R&D allowed the design of a New Generation of station. In order to produce 60m(3) air equivalent Xenon samples every 8h, it implements: (i) larger sampler unit for Xenon extraction (2 compressors and 8 nitrogen membranes), (ii) new noble gas adsorbent (Ag@ZSM5), (iii) hardened components and (iv) new high resolution coincidence low background spectrometer (HPGe/PIPSBox). Station expected radioxenon sensitivity is lower than 0.3mBq/m(3)...
June 28, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28688419/soft-x-ray-spectroscopy-of-nanoparticles-by-velocity-map-imaging
#11
O Kostko, B Xu, M I Jacobs, M Ahmed
Velocity map imaging (VMI), a technique traditionally used to study chemical dynamics in the gas phase, is applied here to study X-ray photoemission from aerosol nanoparticles. Soft X-rays from the Advanced Light Source synchrotron, probe a beam of nanoparticles, and the resulting photoelectrons are velocity mapped to obtain their kinetic energy distributions. A new design of the VMI spectrometer is described. The spectrometer is benchmarked by measuring vacuum ultraviolet photoemission from gas phase xenon and squalene nanoparticles followed by measurements using soft X-rays...
July 7, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28676874/chiroptical-properties-of-cryptophane-111
#12
Thierry Buffeteau, Delphine Pitrat, Nicolas Daugey, Nathalie Calin, Marion Jean, Nicolas Vanthuyne, Laurent Ducasse, Frank Wien, Thierry Brotin
The two enantiomers of cryptophane-111 (1), which possesses the most simplified chemical structure of cryptophane derivatives and exhibits the highest binding constant for xenon encapsulation in organic solution, were separated by HPLC using chiral stationary phases. The chiroptical properties of [CD(+)254]-1 and [CD(-)254]-1 were determined in CH2Cl2 and CHCl3 solutions by polarimetry, electronic circular dichroism (ECD), vibrational circular dichroism (VCD), and Raman optical activity (ROA) experiments and were compared to those of cryptophane-222 (2) derivative...
July 5, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28670151/dual-energy-ct-new-horizon-in-medical-imaging
#13
REVIEW
Hyun Woo Goo, Jin Mo Goo
Dual-energy CT has remained underutilized over the past decade probably due to a cumbersome workflow issue and current technical limitations. Clinical radiologists should be made aware of the potential clinical benefits of dual-energy CT over single-energy CT. To accomplish this aim, the basic principle, current acquisition methods with advantages and disadvantages, and various material-specific imaging methods as clinical applications of dual-energy CT should be addressed in detail. Current dual-energy CT acquisition methods include dual tubes with or without beam filtration, rapid voltage switching, dual-layer detector, split filter technique, and sequential scanning...
July 2017: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/28648106/pressure-autoregulation-measurement-techniques-in-adult-tbi-part-i-a-scoping-review-of-intermittent-semi-intermittent-methods
#14
Frederick Adam Zeiler, Joseph Donnelly, Leanne Calviello, David Menon, Peter Smieleweski, Marek Czosnyka
To perform a systematic, scoping review of commonly described intermittent/semi-intermittent autoregulation measurement techniques in adult TBI. Nine separate systematic reviews were conducted for each intermittent technique: Computed tomographic perfusion (CTP)/Xenon-CT (Xe-CT), positron emission tomography (PET), magnetic resonance imaging (MRI), arterio-venous difference in oxygen (AVDO2) technique, thigh cuff deflation technique (TCDT), transient hyperemic response test (THRT), orthostatic hypotension test (OHT), mean flow index (Mx) and transfer function ARI (TF-ARI)...
June 24, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28644643/first-demonstration-of-a-scintillating-xenon-bubble-chamber-for-detecting-dark-matter-and-coherent-elastic-neutrino-nucleus-scattering
#15
D Baxter, C J Chen, M Crisler, T Cwiok, C E Dahl, A Grimsted, J Gupta, M Jin, R Puig, D Temples, J Zhang
A 30-g xenon bubble chamber, operated at Northwestern University in June and November 2016, has for the first time observed simultaneous bubble nucleation and scintillation by nuclear recoils in a superheated liquid. This chamber is instrumented with a CCD camera for near-IR bubble imaging, a solar-blind photomultiplier tube to detect 175-nm xenon scintillation light, and a piezoelectric acoustic transducer to detect the ultrasonic emission from a growing bubble. The time of nucleation determined from the acoustic signal is used to correlate specific scintillation pulses with bubble-nucleating events...
June 9, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28636798/a-ccpe-based-xenon-biosensor-for-magnetic-resonance-imaging-of-claudin-expressing-cells
#16
Anna Piontek, Christopher Witte, Honor May Rose, Miriam Eichner, Jonas Protze, Gerd Krause, Jörg Piontek, Leif Schröder
The majority of malignant tumors originate from epithelial cells, and many of them are characterized by an overexpression of claudins (Cldns) and their mislocalization out of tight junctions. We utilized the C-terminal claudin-binding domain of Clostridium perfringens enterotoxin (cCPE), with its high affinity to specific members of the claudin family, as the targeting unit for a claudin-sensitive cancer biosensor. To overcome the poor sensitivity of conventional relaxivity-based magnetic resonance imaging (MRI) contrast agents, we utilized the superior sensitivity of xenon Hyper-CEST biosensors...
June 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/28612499/xenon-recovery-at-room-temperature-using-metal-organic-frameworks
#17
Sameh K Elsaidi, Daniele Ongari, Wenqian Xu, Mona H Mohamed, Maciej Haranczyk, Praveen K Thallapally
Xenon is known to be a very efficient anesthetic gas, but its cost prohibits the wider use in medical industry and other potential applications. It has been shown that Xe recovery and recycling from anesthetic gas mixtures can significantly reduce its cost as anesthetic. The current technology uses series of adsorbent columns followed by low-temperature distillation to recover Xe; this method is expensive to use in medical facilities. Herein, we propose a much simpler and more efficient system to recover and recycle Xe from exhaled anesthetic gas mixtures at room temperature using metal-organic frameworks (MOFs)...
June 14, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28610592/xenon-in-the-treatment-of-panic-disorder-an-open-label-study
#18
Alexander Dobrovolsky, Thomas E Ichim, Daqing Ma, Santosh Kesari, Vladimir Bogin
BACKGROUND: Current treatments of panic disorder (PD) are limited by adverse effects, poor efficacy, and need for chronic administration. The established safety profile of subanesthetic concentrations of xenon gas, which is known to act as a glutamate subtype NMDA receptor antagonist, coupled with preclinical studies demonstrating its effects in other anxiety related conditions, prompted us to evaluate its feasibility and efficacy in treatment of patients with PD. METHODS: An open-label clinical trial of xenon-oxygen mixture was conducted in 81 patients with PD; group 1 consisting of patients only with PD (N = 42); and group 2 patients with PD and other comorbidities (N = 39)...
June 13, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28609184/use-of-gases-in-dairy-manufacturing-a-review
#19
Bhaskar Mani Adhikari, Tuyen Truong, Nidhi Bansal, Bhesh Bhandari
Use of gases (air, carbon dioxide and nitrogen) has been practiced in the manufacture of dairy products (i.e. ice cream, whipped cream and butter) to improve their texture, mouthfeel and shelf-life extension. Many attempts have also been made to incorporate other gases such as hydrogen, nitrous oxide, argon, xenon, and helium into the dairy systems for various product functionalities such as whipping, foaming, texture, aroma enhancement and therapeutic properties. The gases can be dissolved in aqueous and fat phases or remain in the form of bubbles stabilised by protein or fat particles...
June 13, 2017: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/28608900/theoretical-and-experimental-studies-on-three-water-stable-isostructural-paddlewheel-based-semiconducting-metal-organic-frameworks
#20
Xiaowei Yang, Yuan Zhang, Feng Li, Tiantian Guo, Yong Wu, Fengyan Jin, Min Fang, Yaqian Lan, Yafei Li, Yong Zhou, Zhigang Zou
Three water-stable isostructural metal-organic frameworks (MOFs) of the general formula [M2(TCS)(BPY)] (M = Co(1), Ni(2) and Cu(3); H4TCS = tetrakis(4-carboxyphenyl) silane, BPY = 4,4'-bipyridine) were synthesized and fully characterized. MOFs 1-3 are stable in pH = 5-11, 2-11, 3-11 aqueous solution respectively for at least 24 h at room temperature. Although H4TCS absorbs only UV light, MOFs 1-3 absorb both UV and visible light in broad ranges (250-800 nm) and absorb more visible light than the ligand BPY...
June 27, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
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