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https://www.readbyqxmd.com/read/28323916/acute-hypercortisolemia-exerts-depot-specific-effects-on-abdominal-and-femoral-adipose-tissue-function
#1
Konstantinos N Manolopoulos, Michael W O'Reilly, Iwona J Bujalska, Jeremy W Tomlinson, Wiebke Arlt
Context: Glucocorticoids have pleiotropic metabolic functions and acute glucocorticoid excess affects fatty acid metabolism, increasing systemic lipolysis. Whether glucocorticoids exert adipose tissue depot-specific effects remains unclear. Objective: In vivo assessment of femoral and abdominal adipose tissue responses to acute glucocorticoid administration. Design and outcome measures: Nine healthy male volunteers studied on two occasions, following a hydrocortisone infusion (0...
February 16, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28298006/nuclear-magnetic-resonance-diffusion-pore-imaging-experimental-phase-detection-by-double-diffusion-encoding
#2
Kerstin Demberg, Frederik Bernd Laun, Johannes Windschuh, Reiner Umathum, Peter Bachert, Tristan Anselm Kuder
Diffusion pore imaging is an extension of diffusion-weighted nuclear magnetic resonance imaging enabling the direct measurement of the shape of arbitrarily formed, closed pores by probing diffusion restrictions using the motion of spin-bearing particles. Examples of such pores comprise cells in biological tissue or oil containing cavities in porous rocks. All pores contained in the measurement volume contribute to one reconstructed image, which reduces the problem of vanishing signal at increasing resolution present in conventional magnetic resonance imaging...
February 2017: Physical Review. E
https://www.readbyqxmd.com/read/28287695/efficient-conjugated-polymer-methyl-viologen-electron-transfer-system-for-controlled-photo-driven-hydrogen-evolution
#3
Huan Lu, Rong Hu, Haotian Bai, Hui Chen, Fengting Lv, Libing Liu, Shu Wang, He Tian
Photo-driven hydrogen production has been a good strategy in solar energy utilization. In this work, we use a water-soluble negatively charged polythiophene derivative as photosensitizer to produce hydrogen from aqueous solution containing methyl viologen (MV2+), ethylenediaminetetraacetic acid disodium salt (EDTA) and a colloidal platinum catalyst upon exposure to Xenon lamp (> 420 nm) or natural sunlight. The supramolecular assembly and dis-assembly processes of MV2+ and cucurbit[8]uril (CB[8]) was further used to reversibly "turn-on" and "turn-off" hydrogen generation of the polymer system...
March 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28272227/effects-of-pulmonary-static-inflation-with-50-xenon-on-oxygen-impairment-during-cardiopulmonary-bypass-for-stanford-type-a-acute-aortic-dissection-a-pilot-study
#4
Mu Jin, Yanwei Yang, Xudong Pan, Jiakai Lu, Zhiquan Zhang, Weiping Cheng
BACKGROUND: The goal of this study was to investigate the effects of pulmonary static inflation with 50% xenon on postoperative oxygen impairment during cardiopulmonary bypass (CPB) for Stanford type A acute aortic dissection (AAD). METHODS: This prospective single-center nonrandomized controlled clinical trial included 100 adult patients undergoing surgery for Stanford type A AAD at an academic hospital in China. Fifty subjects underwent pulmonary static inflation with 50% oxygen from January 2013 to January 2014, and 50 underwent inflation with 50% xenon from January 2014 to December 2014...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28257156/in-situ-and-in-operando-characterization-of-mixing-dynamics-in-liquid-phase-reactions-by-%C3%A2-%C3%A2-%C3%A2-xe-nmr-spectroscopy
#5
Muhammad A Zaheer, Jeremias C Zill, Jörg Matysik, Roger Gläser, Muslim Dvoyashkin
¹²⁹Xe NMR spectroscopy is applied under in situ and in operando conditions to study the mixing process in a multicomponent liquid mixture with partially miscible components. The process of mixing of an oil-methanol mixture was triggered by an industrially relevant catalytic transesterification reaction to form fatty acid methyl esters and glycerol. Up to date, kinetic limitations in liquid phase reactions originating from the poor miscibility of reacting species were addressed solely under ex situ conditions, typically by chromatography...
March 3, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28253849/evaluation-of-an-ultraviolet-room-disinfection-protocol-to-decrease-nursing-home-microbial-burden-infection-and-hospitalization-rates
#6
Christine R Kovach, Yavuz Taneli, Tammy Neiman, Elaine M Dyer, Alvin Jason A Arzaga, Sheryl T Kelber
BACKGROUND: The focus of nursing home infection control procedures has been on decreasing transmission between healthcare workers and residents. Less evidence is available regarding whether decontamination of high-touch environmental surfaces impacts infection rates or resident outcomes. The purpose of this study was to examine if ultraviolet disinfection is associated with changes in: 1) microbial counts and adenosine triphosphate counts on high-touch surfaces; and 2) facility wide nursing home acquired infection rates, and infection-related hospitalization...
March 3, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28250763/molecular-chaperones-and-hypoxic-ischemic-encephalopathy
#7
REVIEW
Cong Hua, Wei-Na Ju, Hang Jin, Xin Sun, Gang Zhao
Hypoxic-ischemic encephalopathy (HIE) is a disease that occurs when the brain is subjected to hypoxia, resulting in neuronal death and neurological deficits, with a poor prognosis. The mechanisms underlying hypoxic-ischemic brain injury include excitatory amino acid release, cellular proteolysis, reactive oxygen species generation, nitric oxide synthesis, and inflammation. The molecular and cellular changes in HIE include protein misfolding, aggregation, and destruction of organelles. The apoptotic pathways activated by ischemia and hypoxia include the mitochondrial pathway, the extrinsic Fas receptor pathway, and the endoplasmic reticulum stress-induced pathway...
January 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/28247437/hyperpolarized-129xe-mri-sensor-for-h2s
#8
Shengjun Yang, Yaping Yuan, Weiping Jiang, Lili Ren, He Deng, Louis-S Bouchard, Xin Zhou, Maili Liu
A new MRI molecular sensor for hydrogen sulfide detection and imaging using the nuclear spin resonance of hyperpolarized 129Xe is developed. The designed MRI sensor employs cryptophane for NMR sensing together with an azide group serving as a reaction site. It demonstrates a 'proof-of-concept' that fluorescent H2S probe can be linked to a xenon-binding cryptophane and thereby converted into an MRI probe, which could provide a very generalizable template.
February 28, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28243918/analgesic-effect-of-xenon-in-rat-model-of-inflammatory-pain
#9
M L Kukushkin, S I Igon'kina, S V Potapov, A V Potapov
The analgesic effects of inert gas xenon were examined on rats. The formalin model of inflammatory pain, tail-flick test, and hot-plate test revealed the antinociceptive effects of subanesthetizing doses of inhalation anesthetic xenon. Inhalation of 50/50 xenon/oxygen mixture moderated the nociceptive responses during acute and tonic phases of inflammatory pain.
February 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28221806/absorption-and-quantum-yield-of-single-conjugated-polymer-poly-2-methoxy-5-2-ethylhexyloxy-1-4-phenylenevinylene-meh-ppv-molecules
#10
Lei Hou, Subhasis Adhikari, Yuxi Tian, Ivan G Scheblykin, Michel Orrit
We simultaneously measured the absorption and emission of single conjugated polymer poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) molecules in a poly(methyl methacrylate) (PMMA) matrix using near-critical xenon to enhance the photothermal contrast for direct absorption measurements. We directly measured the number of monomers and the quantum yield of single conjugated polymer molecules. Simultaneous absorption and emission measurements provided new insight into the photophysics of single conjugated polymers under optical excitation: quenching in larger molecules is more efficient than in smaller ones...
March 8, 2017: Nano Letters
https://www.readbyqxmd.com/read/28195864/profound-hypopnea-with-xenon-anesthesia-in-a-free-diver
#11
LETTER
John R Cormack, Jarrod Gott, Sarah Kondogiannis
No abstract text is available yet for this article.
February 15, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28195746/thermal-variations-of-operative-microscopes-in-otology
#12
T Edward Imbery, Alex J Tampio, Brian D Nicholas
Objectives (1) Measure temperature variations achieved by common otomicroscopes. (2) Raise awareness about possible thermal injury during otologic procedures with the advent of newer, high-powered otomicroscopes. (3) Describe optical technology that aims to reduce the potential for thermal injury. Methods A variety of otomicroscopes, with different light sources (ranging from 100W halogen to 300W xenon), were studied. Temperatures were recorded from human auricular skin with a noncontact infrared thermometer at various microscope light intensities and with use of irrigation...
February 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28192930/mitochondria-targeted-and-intracellular-biothiol-triggered-hyperpolarized-129-xe-magnetofluorescent-biosensor
#13
Qingbin Zeng, Qianni Guo, Yaping Yuan, Yuqi Yang, Bin Zhang, Lili Ren, Xiaoxiao Zhang, Qing Luo, Maili Liu, Louis-S Bouchard, Xin Zhou
Biothiols such as gluthathione (GSH), cysteine (Cys), homocysteine (Hcy), and thioredoxin (Trx) play vital roles in cellular metabolism. Various diseases are associated with abnormal cellular biothiol levels. Thus, the intracellular detection of biothiol levels could be a useful diagnostic tool. A number of methods have been developed to detect intracellular thiols, but sensitivity and specificity problems have limited their applications. To address these limitations, we have designed a new biosensor based on hyperpolarized xenon magnetic resonance detection, which can be used to detect biothiol levels noninvasively...
February 9, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28190843/application-of-internal-standard-method-for-several-3d-transition-metallic-elements-in-flame-atomic-absorption-spectrometry-using-a-multi-wavelength-high-resolution-spectrometer
#14
Yusuke Toya, Toshiko Itagaki, Kazuaki Wagatsuma
We investigated a simultaneous internal standard method in flame atomic absorption spectrometry (FAAS), in order to better the analytical precision of 3d-transition metals contained in steel materials. For this purpose, a new spectrometer system for FAAS, comprising a bright xenon lamp as the primary radiation source and a high-resolution Echelle monochromator, was employed to measure several absorption lines at a wavelength width of ca. 0.3 nm at the same time, which enables the absorbances of an analytical line and also an internal standard line to be estimated...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28174344/glucagon-like-peptide-1-elicits-vasodilation-in-adipose-tissue-and-skeletal-muscle-in-healthy-men
#15
Ali Asmar, Meena Asmar, Lene Simonsen, Sten Madsbad, Jens J Holst, Bolette Hartmann, Charlotte M Sorensen, Jens Bülow
In healthy subjects, we recently demonstrated that during acute administration of GLP-1, cardiac output increased significantly, whereas renal blood flow remained constant. We therefore hypothesize that GLP-1 induces vasodilation in other organs, for example, adipose tissue, skeletal muscle, and/or splanchnic tissues. Nine healthy men were examined twice in random order during a 2-hour infusion of either GLP-1 (1.5 pmol kg(-1) min(-1)) or saline. Cardiac output was continuously estimated noninvasively concomitantly with measurement of intra-arterial blood pressure...
February 2017: Physiological Reports
https://www.readbyqxmd.com/read/28161604/-135-xe-measurements-with-a-two-element-czt-based-radioxenon-detector-for-nuclear-explosion-monitoring
#16
Lily Ranjbar, Abi T Farsoni, Eric M Becker
Measurement of elevated concentrations of xenon radioisotopes ((131m)Xe, (133m)Xe, (133)Xe and (135)Xe) in the atmosphere has been shown to be a very powerful method for verifying whether or not a detected explosion is nuclear in nature. These isotopes are among the few with enough mobility and with half-lives long enough to make their detection at long distances realistic. Existing radioxenon detection systems used by the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) suffer from problems such as complexity, need for high maintenance and memory effect...
February 2, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28147226/detectability-of-colorectal-neoplastic-lesions-using-a-novel-endoscopic-system-with-blue-laser-imaging-a-multicenter-randomized-controlled-trial
#17
Hiroaki Ikematsu, Taku Sakamoto, Kazutomo Togashi, Naohisa Yoshida, Takashi Hisabe, Shinsuke Kiriyama, Koji Matsuda, Yoshikazu Hayashi, Takahisa Matsuda, Shozo Osera, Kazuhiro Kaneko, Kenichi Utano, Yuji Naito, Hiroshi Ishihara, Masayuki Kato, Kenichi Yoshimura, Hideki Ishikawa, Hironori Yamamoto, Yutaka Saito
BACKGROUND AND AIMS: Most studies have not reported an improvement in the detection of adenomas with the use of image-enhanced colonoscopy methods, possibly because of the darkness of the images. To overcome this limitation, a new-generation endoscopic system has been developed. This system has 2 blue-laser imaging (BLI) observation modes. The BLI observation was set to BLI-bright mode to detect lesions. We aimed to evaluate the efficacy of BLI in detecting lesions. METHODS: This study was designed as a randomized controlled trial with participants from 8 institutions...
January 29, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28144572/photo-ignition-process-of-multiwall-carbon-nanotubes-and-ferrocene-by-continuous-wave-xe-lamp-illumination
#18
Paolo Visconti, Patrizio Primiceri, Daniele Longo, Luciano Strafella, Paolo Carlucci, Mauro Lomascolo, Arianna Cretì, Giuseppe Mele
This work aims to investigate and characterize the photo-ignition phenomenon of MWCNT/ferrocene mixtures by using a continuous wave (CW) xenon (Xe) light source, in order to find the power ignition threshold by employing a different type of light source as was used in previous research (i.e., pulsed Xe lamp). The experimental photo-ignition tests were carried out by varying the weight ratio of the used mixtures, luminous power, and wavelength range of the incident Xe light by using selective optical filters...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28128598/results-from-a-search-for-dark-matter-in-the-complete-lux-exposure
#19
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, R Bramante, 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 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, M Ihm, 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, P Phelps, 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, 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 report constraints on spin-independent weakly interacting massive particle (WIMP)-nucleon scattering using a 3.35×10^{4}  kg day exposure of the Large Underground Xenon (LUX) experiment. A dual-phase xenon time projection chamber with 250 kg of active mass is operated at the Sanford Underground Research Facility under Lead, South Dakota (USA). With roughly fourfold improvement in sensitivity for high WIMP masses relative to our previous results, this search yields no evidence of WIMP nuclear recoils...
January 13, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28119201/design-synthesis-structure-activity-relationship-and-mechanism-of-action-studies-of-a-series-of-4-chloro-1-phthalazinyl-hydrazones-as-a-potent-agent-against-leishmania-braziliensis
#20
Angel H Romero, Rafael Medina, Anamaría Alcala, Yael García-Marchan, Jorge Núñez-Duran, Jacques Leañez, Ali Mijoba, Carlos Ciangherotti, Xenón Serrano-Martín, Simón E López
With the aim to identify a potential drug candidate to treat cutaneous leishmaniasis, a series of 1-phthalazinyl hydrazones were synthesized and tested against Leishmania braziliensis parasite, one of the main responsible of this disease in the world. A structure-activity relationship permitted to identify two phthalazines containing nitroheterocyclic moiety 3l and 3m as promising new lead compounds. These compounds showed a significant antileishmanial activity against promastigote form of L. braziliensis, with EC50 values in sub-micromolar and nanomolar ranges...
February 15, 2017: European Journal of Medicinal Chemistry
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