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https://www.readbyqxmd.com/read/29349263/worldviews-and-trust-of-sources-for-health-information-on-electronic-nicotine-delivery-systems-effects-on-risk-perceptions-and-use
#1
Scott R Weaver, Amelia Jazwa, Lucy Popova, Paul Slovic, Richard B Rothenberg, Michael P Eriksen
Public health agencies, the news media, and the tobacco/vapor industry have issued contradictory statements about the health effects of electronic nicotine delivery systems (ENDS). We investigated the levels of trust that consumers place in different information sources and how trust is associated with cultural worldviews, risk perceptions, ENDS use, and sociodemographic characteristics using a nationally representative sample of 6051 U.S. adults in 2015. Seventeen percent of adults were uncertain about their trust for one or more potential sources...
December 2017: SSM—Population Health
https://www.readbyqxmd.com/read/29348276/congenital-tuberculosis-presenting-as-otorrhoea-in-a-preterm-infant
#2
Jose Carlos Aldana-Aguirre, Hamdy El-Hakim, Ernest Phillipos, Marc-Antoine Landry
A premature infant of 25 weeks' gestational age presented at 8 weeks after birth with otorrhoea from the left ear. Following a course of topical and systemic antibiotics, the patient deteriorated developing facial nerve paralysis and cervical lymphadenitis. Contrast-enhanced CT and MRI of the head showed a destructive process of the left temporal bone. These findings prompted the clinicians to send swabs from the purulent discharge from the ear for acid-fast bacilli stain. Furthermore, surgical exploration and debridement were undertaken...
January 17, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29347028/continuous-time-random-walk-model-for-anomalous-diffusion-in-expanding-media
#3
F Le Vot, E Abad, S B Yuste
Expanding media are typical in many different fields, e.g., in biology and cosmology. In general, a medium expansion (contraction) brings about dramatic changes in the behavior of diffusive transport properties such as the set of positional moments and the Green's function. Here, we focus on the characterization of such effects when the diffusion process is described by the continuous-time random-walk (CTRW) model. As is well known, when the medium is static this model yields anomalous diffusion for a proper choice of the probability density function (pdf) for the jump length and the waiting time, but the behavior may change drastically if a medium expansion is superimposed on the intrinsic random motion of the diffusing particle...
September 2017: Physical Review. E
https://www.readbyqxmd.com/read/29346901/method-of-model-reduction-and-multifidelity-models-for-solute-transport-in-random-layered-porous-media
#4
Zhijie Xu, Alexandre M Tartakovsky
This work presents a method of model reduction that leads to models with three solutions of increasing fidelity (multifidelity models) for solute transport in a bounded layered porous media with random permeability. The model generalizes the Taylor-Aris dispersion theory to stochastic transport in random layered porous media with a known velocity covariance function. In the reduced model, we represent (random) concentration in terms of its cross-sectional average and a variation function. We derive a one-dimensional stochastic advection-dispersion-type equation for the average concentration and a stochastic Poisson equation for the variation function, as well as expressions for the effective velocity and dispersion coefficient...
September 2017: Physical Review. E
https://www.readbyqxmd.com/read/29346868/effective-one-dimensional-approach-to-the-source-reconstruction-problem-of-three-dimensional-inverse-optoacoustics
#5
J Stritzel, O Melchert, M Wollweber, B Roth
The direct problem of optoacoustic signal generation in biological media consists of solving an inhomogeneous three-dimensional (3D) wave equation for an initial acoustic stress profile. In contrast, the more defiant inverse problem requires the reconstruction of the initial stress profile from a proper set of observed signals. In this article, we consider an effectively 1D approach, based on the assumption of a Gaussian transverse irradiation source profile and plane acoustic waves, in which the effects of acoustic diffraction are described in terms of a linear integral equation...
September 2017: Physical Review. E
https://www.readbyqxmd.com/read/29345738/elucidation-of-the-oxygen-reduction-volcano-in-alkaline-media-using-a-copper-platinum-111-alloy
#6
Kim Degn Jensen, Jakub Tymoczko, Jan Rossmeisl, Aliaksandr Bandarenka, Ib Chorkendorff, Maria Escudero-Escribano, Ifan Erfyl Lester Stephens
Herein we experimentally explore the relationship between the binding of the reaction intermediates and oxygen reduction activity in alkaline media. By introducing Cu into the 2nd surface layer of a Pt(111) single crystal, we tune the surface reactivity. We demonstrate that in both NaOH and KOH, the optimal catalyst should exhibit OH binding ~0.1 eV weaker than Pt(111), via a Sabatier volcano; this observation suggests that the reaction is mediated via the same surface bound intermediates as in acid, in contrast to previous reports...
January 18, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29343618/retention-of-acholeplasma-laidlawii-by-sterile-filtration-membranes-effect-of-cultivation-medium-and-filtration-temperature
#7
Alexander Helling, Hannes König, Felix Seiler, Ralph Berkholz, Volkmar Thom, Milan Polakovic
This experimental study compares cell size, zeta potential and the ability to penetrate tailor-made size exclusion membrane filters of mycoplasma A. laidlawii cultivated in five different cultivation media. The influence of relevant filtration process parameters, in particular transmembrane pressure and filtration temperature, on their respective retention was tested. The impact of the filtration temperature was further evaluated for the Gram-negative bacteria species Brevundimonas diminuta, the Gram-positive bacteria species Staphylococcus epidermidis, the Pseudomonas phage PP7 and the mycoplasma species M...
January 17, 2018: PDA Journal of Pharmaceutical Science and Technology
https://www.readbyqxmd.com/read/29341707/anomalous-acoustic-plasmon-mode-from-topologically-protected-states
#8
Xun Jia, Shuyuan Zhang, Raman Sankar, Fang-Cheng Chou, Weihua Wang, K Kempa, E W Plummer, Jiandi Zhang, Xuetao Zhu, Jiandong Guo
Plasmons, the collective excitations of electrons in the bulk or at the surface, play an important role in the properties of materials, and have generated the field of "plasmonics." We report the observation of a highly unusual acoustic plasmon mode on the surface of a three-dimensional topological insulator (TI) Bi_{2}Se_{3}, using momentum resolved inelastic electron scattering. In sharp contrast to ordinary plasmon modes, this mode exhibits almost linear dispersion into the second Brillouin zone and remains prominent with remarkably weak damping not seen in any other systems...
September 29, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29341670/surface-polarization-effects-on-ion-containing-emulsions
#9
Meng Shen, Honghao Li, Monica Olvera de la Cruz
Surface polarization in ion-containing heterogeneous dielectric media such as cell media and emulsions is determined by and determines the positions of the ions. We compute the surface polarization self-consistently as the ions move and analyze their effects on the interactions between electro-neutral, ion-containing droplets using coarse-grained molecular dynamics simulations based on the true energy functional. For water droplets immersed in oil, the interdroplet interaction is attractive, and the surface polarization makes the major contribution...
September 29, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29340768/the-comparison-of-clinical-outcomes-in-patients-with-acute-myocardial-infarction-and-advanced-chronic-kidney-disease-on-chronic-hemodialysis-versus-off-hemodialysis
#10
Naoyuki Akashi, Kenichi Sakakura, Yusuke Watanabe, Masamitsu Noguchi, Yousuke Taniguchi, Kei Yamamoto, Hiroshi Wada, Shin-Ichi Momomura, Hideo Fujita
Acute myocardial infarction (AMI) is more frequently observed in patients with chronic kidney disease (CKD) than in patients without CKD. Initial treatment strategy for AMI includes primary percutaneous coronary intervention (PCI), which requires substantial amount of contrast media. We hypothesized that the clinical outcomes are comparable or worse in patients with AMI and advanced CKD off chronic hemodialysis as compared to patients with AMI and advanced CKD on chronic hemodialysis. The purpose of this study was to compare the clinical outcomes of patients with AMI and advanced CKD on hemodialysis versus off hemodialysis...
January 16, 2018: Heart and Vessels
https://www.readbyqxmd.com/read/29340315/contrast-induced-nephropathy-and-oxygen-pretreatment-in-patients-with-impaired-renal-function
#11
Haruki Sekiguchi, Yoichi Ajiro, Yoshie Uchida, Kentaro Jujo, Kazunori Iwade, Naohide Tanaka, Ken Shimamoto, Yukio Tsurumi, Masatoshi Kawana, Nobuhisa Hagiwara
Introduction: Contrast-induced nephropathy is a complication following coronary angiography and percutaneous coronary intervention. Because contrast-induced nephropathy is a predictor of long-term mortality in patients with ischemic heart disease undergoing percutaneous coronary intervention, preventive strategies are required. We assessed the effects of periprocedural oxygenation on contrast-induced nephropathy among patients with pre-existing renal dysfunction. Methods: A total of 200 consecutive patients with impaired renal function (estimated glomerular filtration < 60 ml/min per 1...
January 2018: KI Reports
https://www.readbyqxmd.com/read/29339048/intrarenal-fat-deposition-does-not-interfere-with-the-measurement-of-single-kidney-perfusion-in-obese-swine-using-multi-detector-computed-tomography
#12
Christopher M Ferguson, Alfonso Eirin, Gregory J Michalak, Ahmad F Hedayat, Abdelrhman Abumoawad, Ahmed Saad, Xiangyang Zhu, Stephen C Textor, Cynthia H McCollough, Lilach O Lerman
BACKGROUND: Altered vascular structure or function in several diseases may impair renal perfusion. Multi-detector computed tomography (MDCT) is a non-invasive tool to assess single-kidney perfusion and function based on dynamic changes in tissue attenuation during contrast media transit. However, changes in basal tissue attenuation might hamper these assessments, despite background subtraction. Evaluation of iodine concentration using the dual-energy (DECT) MDCT mode allows excluding effects of basal values on dynamic changes in tissue attenuation...
January 10, 2018: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29338881/infiltration-behaviour-of-elemental-mercury-dnapl-in-fully-and-partially-water-saturated-porous-media
#13
Andrea D'Aniello, Niels Hartog, Thomas Sweijen, Domenico Pianese
Mercury is a contaminant of global concern due to its harmful effects on human health and for the detrimental consequences of its release in the environment. Sources of liquid elemental mercury are usually anthropogenic, such as chlor-alkali plants. To date insight into the infiltration behaviour of liquid elemental mercury in the subsurface is lacking, although this is critical for assessing both characterization and remediation approaches for mercury DNAPL contaminated sites. Therefore, in this study the infiltration behaviour of elemental mercury in fully and partially water saturated systems was investigated using column experiments...
January 8, 2018: Journal of Contaminant Hydrology
https://www.readbyqxmd.com/read/29338704/alcohol-marketing-on-youtube-exploratory-analysis-of-content-adaptation-to-enhance-user-engagement-in-different-national-contexts
#14
Himanshu Gupta, Tina Lam, Simone Pettigrew, Robert J Tait
BACKGROUND: We know little about how social media alcohol marketing is utilized for alcohol promotion in different national contexts. There does not appear to be any academic work on online exposure to alcohol marketing via social media in India, and most of the limited research in Australia has focused on Facebook. Hence, the present study extends previous research by investigating alcohol promotion conducted on an under-researched form of social media (YouTube) in two contrasting geographic contexts...
January 16, 2018: BMC Public Health
https://www.readbyqxmd.com/read/29337841/frequency-and-severity-of-acute-allergic-like-reactions-to-intravenously-administered-gadolinium-based-contrast-media-in-children
#15
Monica M Forbes-Amrhein, Jonathan R Dillman, Andrew T Trout, Bernadette L Koch, Julie M Dickerson, Richard M Giordano, Alexander J Towbin
OBJECTIVES: The purpose of this study is to determine the frequency and severity of acute allergic-like reactions to gadolinium-based contrast media (GBCM) in children before, during, and after the transition from gadopentetate dimeglumine to gadoterate meglumine as our primary clinical GBCM. MATERIALS AND METHODS: Institutional review board approval was obtained for this Health Insurance Portability and Accountability Act-compliant retrospective investigation. Allergic-like reactions to GBCM in pediatric patients were retrospectively assessed from January 2009 to January 2017, which included a departmental change of GBCM from gadopentetate dimeglumine to gadoterate meglumine...
January 15, 2018: Investigative Radiology
https://www.readbyqxmd.com/read/29337590/novel-mechanism-for-nicotinamide-phosphoribosyltransferase-inhibition-of-tnf-%C3%AE-mediated-apoptosis-in-human-lung-endothelial-cells
#16
Radu C Oita, Sara M Camp, Wenli Ma, Ermelinda Ceco, Mark Harbeck, Patrick Singleton, Joe Messana, Xiaoguang Sun, Ting Wang, Joe G N Garcia
Nicotinamide phosphoribosyltransferase (NAMPT) exists as both intracellular (iNAMPT) and extracellular (eNAMPT) proteins. eNAMPT is secreted into the blood and functions as a cytokine/enzyme (cytozyme) that activates NFκB signaling via ligation of the TLR4 receptor, further serving as a biomarker for inflammatory lung disorders such as the acute respiratory distress syndrome (ARDS). In contrast, iNAMPT is involved in nicotinamide mononucleotide (NMN) synthesis and has been implicated in the regulation of cellular apoptosis, although the exact mechanisms for this regulation are poorly understood...
January 16, 2018: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/29336587/spatially-resolved-spectral-powder-analysis-experiments-and-modeling
#17
Otto Scheibelhofer, Patrick R Wahl, Boris Larchevêque, Fabien Chauchard, Johannes G Khinast
Understanding the behavior of light in granular media is necessary for determining the sample size, shape, and weight when probing using fiber optic setups. This is required for a correct estimate of the active pharmaceutical ingredient content in a pharmaceutical blend via near-infrared spectroscopy. Several strategies to describe the behavior of light in granular and turbid media exist. A common approach is the Monte-Carlo simulation of individual photons and their description using mean free path lengths for scattering and absorption...
January 1, 2018: Applied Spectroscopy
https://www.readbyqxmd.com/read/29336207/cytotoxicity-of-ciprofloxacin-and-steroids-in-mouse-tympanic-membrane-fibroblasts
#18
Sonny Redula, Patrick J Antonelli, Carolyn O Dirain
Objective Ciprofloxacin, commonly given as eardrops, has been shown to adversely affect tympanic membrane fibroblasts. Dexamethasone potentiates this effect. A newly available eardrop contains ciprofloxacin and fluocinolone, a more potent steroid. We evaluated the cytotoxic effects of this preparation on mouse tympanic membrane fibroblasts. Study Design Prospective, in vitro. Setting Academic laboratory. Subjects and Methods In experiment 1, fibroblasts were exposed to 1:10 dilutions of commercially available 0...
January 1, 2018: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/29330649/growth-of-leptospirillum-ferriphilum-in-sulfur-medium-in-co-culture-with-acidithiobacillus-caldus
#19
Sarah L Smith, D Barrie Johnson
Leptospirillum ferriphilum and Acidithiobacillus caldus are both thermotolerant acidophilic bacteria that frequently co-exist in natural and man-made environments, such as biomining sites. Both are aerobic chemolithotrophs; L. ferriphilum is known only to use ferrous iron as electron donor, while A. caldus can use zero-valent and reduced sulfur, and also hydrogen, as electron donors. It has recently been demonstrated that A. caldus reduces ferric iron to ferrous when grown aerobically on sulfur. Experiments were carried out which demonstrated that this allowed L...
January 12, 2018: Extremophiles: Life Under Extreme Conditions
https://www.readbyqxmd.com/read/29328235/non-diffracting-beams-for-label-free-imaging-through-turbid-media
#20
Harel Nagar, Elad Dekel, Dror Kasimov, Yael Roichman
We propose a new method to image through dynamically changing turbid media based on the scanning of non-diffractive laser beams. We use computer-generated holograms to create Airy beams and compare quantitatively the characteristics of their propagation in clear and turbid media. Imaging contrast is achieved by relative reflection of the scanned beams from the imaged surface. We implement our method to demonstrate experimentally our ability to image a chromium surface on a glass slide through 270 μm of highly scattering milk/water mixtures with a resolution of several microns...
January 15, 2018: Optics Letters
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