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https://www.readbyqxmd.com/read/28654287/near-infrared-and-two-wavelength-electrochromism-based-on-nanocrystalline-tio2-films-functionalized-with-ruthenium-amine-conjugated-complexes
#1
Zhi-Juan Li, Jiang-Yang Shao, Yu-Wu Zhong
Two cyclometalated ruthenium complexes 2 and 4 containing a redox-active amine substituent and three carboxylic acid groups were synthesized, where the ruthenium ion and the amine site were separated by a phenyl or biphenyl bridge for 2 and 4, respectively. Nanocrystalline TiO2 films on fluorine doped SnO2 (FTO)/glass substrates anchored with 2 or 4 were prepared. These films display two consecutive anodic waves in the potential region between +0.1 and +1.0 V vs Ag/AgCl. Among four organic solvents examined, the FTO/TiO2/2 film displays the best cyclic electrochemical stability in ClCH2CH2Cl...
June 27, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28653838/on-top-pair-density-as-a-measure-of-left-right-correlation-in-bond-breaking
#2
Rebecca K Carlson, Donald G Truhlar, Laura Gagliardi
In order to better understand left-right electron correlation and the effect of bond breaking on the on-top pair density, analytic expressions for the total density, the on-top pair density, and the ratio of the on-top pair density to the square of the total density were derived for H2 for both a restricted Hartree-Fock wave function and a complete active space self-consistent-field wave function with two electrons in two active orbitals. These quantities are compared for the two wave functions for various points in space around the molecule as a function of internuclear distance...
June 27, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28651307/role-of-shear-wave-elastography-in-evaluating-the-risk-of-hepatocellular-carcinoma-in-patients-with-chronic-hepatitis-b
#3
Jae Yoon Jeong, Joo Hyun Sohn, Won Sohn, Chan Hyuk Park, Tae Yeob Kim, Dae Won Jun, Yongsoo Kim, Woo Kyoung Jeong
Background/Aims: To investigate the use of measurements of liver stiffness (LS) by two-dimensional real-time shear wave elastography (SWE) for predicting the development of hepatocellular carcinoma (HCC) in patients with chronic hepatitis B (CHB). Methods: We retrospectively collected data on 291 enrolled patients with CHB whose LS had been measured using SWE. Results: The mean age of the patients was 46.8 years; males predominated (67%), and 40 of the patients (14%) had clinical cirrhosis...
June 27, 2017: Gut and Liver
https://www.readbyqxmd.com/read/28650972/contribution-of-cognitive-performance-and-cognitive-decline-to-associations-between-socioeconomic-factors-and-dementia-a-cohort-study
#4
Jennifer Rusmaully, Aline Dugravot, Jean-Paul Moatti, Michael G Marmot, Alexis Elbaz, Mika Kivimaki, Séverine Sabia, Archana Singh-Manoux
BACKGROUND: Socioeconomic disadvantage is a risk factor for dementia, but longitudinal studies suggest that it does not affect the rate of cognitive decline. Our objective is to understand the manner in which socioeconomic disadvantage shapes dementia risk by examining its associations with midlife cognitive performance and cognitive decline from midlife to old age, including cognitive decline trajectories in those with dementia. METHODS AND FINDINGS: Data are drawn from the Whitehall II study (N = 10,308 at study recruitment in 1985), with cognitive function assessed at 4 waves (1997, 2002, 2007, and 2012)...
June 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28650809/beam-diffraction-effects-in-the-backward-wave-regions-of-viscoelastic-leaky-lamb-modes-for-plate-transmission-at-normal-incidence
#5
Magne Aanes, Kjetil D Lohne, Per Lunde, Magne Vestrheim
Plane-wave theory for fluid-embedded isotropic plates is often used in ultrasonic guided-wave applications, and to estimate wall thickness, corrosion, or sound velocities in plates and pipes. In such structures, measured ultrasonic transmission through the solid material is affected by acoustic beam diffraction effects, and the results may deviate from plane-wave descriptions, which are insufficient to describe the complex effects that occur. When exciting a fluid-embedded steel plate with a pulsed ultrasonic beam at normal incidence, resonance frequency downshift, axial sound pressure level (SPL) increase, and beam narrowing have been observed, for measured resonance peaks in the frequency regions of certain leaky Lamb mode branches of the plate...
June 26, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28650041/competition-between-the-h-and-d-atom-transfer-channels-in-the-h2o-hd-reaction-reduced-dimensional-quantum-and-quasi-classical-studies
#6
Hongwei Song, Anyang Li, Minghui Yang, Hua Guo
The ion-molecule reaction between a water cation and a hydrogen molecule has recently attracted considerable interest due to its importance in astrochemistry. In this work, the intramolecular isotope effect of the H2O(+) + HD reaction is investigated using a seven-dimensional initial state-selected time-dependent wave packet approach as well as a full-dimensional quasi-classical trajectory method on a full-dimensional ab initio global potential energy surface. The calculated branching ratios for the formation of H3O(+) and H2DO(+)via H- and D-transfer agree reasonably well with the experimental values...
June 26, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28648902/self-reported-unsteadiness-predicts-fear-of-falling-activity-restriction-falls-and-disability
#7
Orna A Donoghue, Annalisa Setti, Neil O'Leary, Rose Anne Kenny
OBJECTIVE: To determine if self-reported unsteadiness during walking is associated with fear of falling (FOF), fear-related activity restriction, falls, and disability over 2 years in community-dwelling adults. DESIGN: Data were obtained from the first 2 waves of The Irish Longitudinal Study on Ageing, a population-based study. SETTING: Participants completed a home-based interview and a center-based health assessment at baseline and a home-based interview at 2 years follow-up...
July 1, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28647890/comparison-of-lercanidipine-plus-hydrochlorothiazide-vs-lercanidipine-plus-enalapril-on-micro-and-macrocirculation-in-patients-with-mild-essential-hypertension
#8
Carolina De Ciuceis, Massimo Salvetti, Anna Paini, Claudia Rossini, Maria Lorenza Muiesan, Sarah Duse, Stefano Caletti, Maria Antonietta Coschignano, Francesco Semeraro, Valentina Trapletti, Fabio Bertacchini, Valeria Brami, Alina Petelca, Enrico Agabiti Rosei, Damiano Rizzoni, Claudia Agabiti Rosei
Dihydropyridine calcium channel blockers may possess antioxidant properties, and might improve micro and macrovascular structure and function. Combination treatment with an ACE inhibitor may have additional advantages, compared with a thiazide diuretic. The aim of the present study is to investigate the effects of a short-term treatment with lercanidipine, and to compare two combination treatments: lercanidipine + enalapril vs. lercanidipine + hydrochlorothiazide on structural alterations in retinal arterioles, on skin capillary density and on large artery distensibility...
June 24, 2017: Internal and Emergency Medicine
https://www.readbyqxmd.com/read/28646602/comparison-of-acoustic-radiation-force-impulse-imaging-and-strain-elastography-in-differentiating-malignant-from-benign-thyroid-nodules
#9
Fengjuan Zhang, Xinming Zhao, Ruoling Han, Min Du, Ping Li, Xiaohui Ji
OBJECTIVES: This study aimed to evaluate the diagnostic value of acoustic radiation force impulse (ARFI) imaging and strain elastography in differentiating malignant from benign thyroid nodules. METHODS: This study included 128 patients (104 female and 24 male; mean age ± standard deviation, 48 ± 11 years; range, 23-76 years) with 152 pathologically proven thyroid nodules. Conventional sonography, strain ratio (SR) of strain elastography, virtual touch tissue imaging (VTI) grade, and virtual touch tissue quantification (shear wave velocity [SWV]) from ARFI imaging data were generated for each nodule...
June 24, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28645983/the-effect-of-magnesium-supplementation-on-vascular-calcification-in-chronic-kidney-disease-a-randomised-clinical-trial-magical-ckd-essential-study-design-and-rationale
#10
Iain Bressendorff, Ditte Hansen, Morten Schou, Charlotte Kragelund, Lisbet Brandi
INTRODUCTION: Chronic kidney disease (CKD) is associated with an increased risk of cardiovascular disease and mortality, which is thought to be caused by increased propensity towards vascular calcification (VC). Magnesium (Mg) inhibits phosphate-induced VC in vitro and in animal models and serum Mg is inversely associated with cardiovascular mortality in predialysis CKD and in end-stage renal disease. This paper will describe the design and rationale of a randomised double-blinded placebo-controlled multicentre clinical trial, which will investigate whether oral Mg supplementation can prevent the progression of coronary artery calcification (CAC) in subjects with predialysis CKD...
June 23, 2017: BMJ Open
https://www.readbyqxmd.com/read/28645730/the-relation-of-digital-vascular-function-to-cardiovascular-risk-factors-in-african-americans-using-digital-tonometry-the-jackson-heart-study
#11
Eric E McClendon, Solomon K Musani, Tandaw E Samdarshi, Sushant Khaire, Donny Stokes, Naomi M Hamburg, Koby Sheffy, Gary F Mitchell, Herman R Taylor, Emelia J Benjamin, Ervin R Fox
Digital vascular tone and function, as measured by peripheral arterial tonometry (PAT), are associated with cardiovascular risk and events in non-Hispanic whites. There are limited data on relations between PAT and cardiovascular risk in African-Americans. PAT was performed on a subset of Jackson Heart Study participants using a fingertip tonometry device. Resting digital vascular tone was assessed as baseline pulse amplitude. Hyperemic vascular response to 5 minutes of ischemia was expressed as the PAT ratio (hyperemic/baseline amplitude ratio)...
June 2017: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/28645136/childhood-traumatic-experiences-and-the-association-with-marijuana-and-cocaine-use-in-adolescence-through-adulthood
#12
Joy D Scheidell, Kelly Quinn, Susan P McGorray, B Christopher Frueh, Nisha N Beharie, Linda B Cottler, Maria R Khan
BACKGROUND AND AIMS: Examination of longitudinal relationships between childhood traumatic experiences and drug use across the life-course at the national level, with control of confounding by other forms of trauma, is needed. We aimed to estimate the prevalence of nine typologies of childhood traumas and the cumulative number experienced, correlation between traumas, and associations between individual and cumulative number of traumas with drug use during adolescence, emerging adulthood, and adulthood...
June 23, 2017: Addiction
https://www.readbyqxmd.com/read/28643832/metasurface-integrated-high-energy-efficient-and-high-linearly-polarized-ingan-gan-light-emitting-diode
#13
Miao Wang, Fuyang Xu, Yu Lin, Bing Cao, Linghua Chen, Chinhua Wang, Jianfeng Wang, Ke Xu
We proposed and demonstrated an integrated high energy efficient and high linearly polarized InGaN/GaN green LED grown on (0001) oriented sapphire with combined metasurface polarizing converter and polarizer system. It is different from those conventional polarized light emissions generated with plasmonic metallic grating in which at least 50% high energy loss occurs inherently due to high reflection of the transverse electric (TE) component of an electric field. A reflecting metasurface, with a two dimensional elliptic metal cylinder array (EMCA) that functions as a half-wave plate, was integrated at the bottom of a LED such that the back-reflected TE component, that is otherwise lost by a dielectric/metal bi-layered wire grids (DMBiWG) polarizer on the top emitting surface of the LED, can be converted to desired transverse magnetic (TM) polarized emission after reflecting from the metasurface...
June 23, 2017: Nanoscale
https://www.readbyqxmd.com/read/28643579/religious-participation-and-biological-functioning-in-mexico
#14
Terrence D Hill, Sunshine M Rote, Christopher G Ellison
OBJECTIVE: Although several studies suggest that religious involvement tends to favor healthy biological functioning, most of this work has been conducted in the United States. This study explores the association between religious participation and biological functioning in Mexico. METHOD: The data are drawn from two waves of the Mexican Health and Aging Study (2003-2012) to assess continuous and categorical biomarker specifications. RESULTS: Across specifications, religious participation in 2003 is associated with lower levels of waist-to-hip ratio, total cholesterol, pulse rate, and overall allostatic load in 2012...
June 1, 2017: Journal of Aging and Health
https://www.readbyqxmd.com/read/28643215/relationship-between-instantaneous-wave-free-ratio-and-fractional-flow-reserve-in-patients-receiving-hemodialysis
#15
Yuta Morioka, Hiroyuki Arashi, Hisao Otsuki, Junichi Yamaguchi, Nobuhisa Hagiwara
Instantaneous wave-free ratio (iFR) is a vasodilator-free index and is reported to have a good correlation with fractional flow reserve (FFR). Hemodialysis patients exhibit left ventricular hypertrophy, reduced arterial compliance, and impaired microcirculation. Such a coronary flow condition in these patients may influence the relationship between iFR and FFR. This study assessed the impact of hemodialysis on the relationship between iFR and FFR. The study enrolled 196 patients with 265 stenoses who underwent assessment via iFR, FFR assessment, and right heart catheterization...
June 22, 2017: Cardiovascular Intervention and Therapeutics
https://www.readbyqxmd.com/read/28642559/little-evidence-to-support-or-refute-interventions-for-the-management-of-burning-mouth-syndrome
#16
Debra K Fischoff, Silvia Spivakovsky
Data sourcesCochrane Oral Health's Trials Register, Cochrane Central Register of Controlled Trials (CENTRAL), Medline Ovid, Embase Ovid, US National Institutes of Health Ongoing Trials Register (ClinicalTrials.gov) and the World Health Organization International Clinical Trials Registry Platform. Handsearch of the proceedings from the British Society for Oral Medicine (BSOM), British Society for Dental Research (BSDR) and the International Association for Dental Research (IADR).Study selectionAll included studies were randomised placebo controlled trials comparing a treatment to placebo with no language or year of publication restrictions...
June 23, 2017: Evidence-based Dentistry
https://www.readbyqxmd.com/read/28641910/dependence-of-boiling-histotripsy-treatment-efficiency-on-hifu-frequency-and-focal-pressure-levels
#17
Tatiana D Khokhlova, Yasser A Haider, Adam D Maxwell, Wayne Kreider, Michael R Bailey, Vera A Khokhlova
Boiling histotripsy (BH) is a high-intensity focused ultrasound (HIFU)-based method of mechanical tissue fractionation that utilizes millisecond-long bursts of HIFU shock waves to cause boiling at the focus in milliseconds. The subsequent interaction of the incoming shocks with the vapor bubble mechanically lyses surrounding tissue and cells. The acoustic parameter space for BH has been investigated previously and an inverse dependence between the HIFU frequency and the dimensions of a BH lesion has been observed...
June 19, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28641116/mechanisms-for-selective-single-cell-reactivation-during-offline-sharp-wave-ripples-and-their-distortion-by-fast-ripples
#18
Manuel Valero, Robert G Averkin, Ivan Fernandez-Lamo, Juan Aguilar, Diego Lopez-Pigozzi, Jorge R Brotons-Mas, Elena Cid, Gabor Tamas, Liset Menendez de la Prida
Memory traces are reactivated selectively during sharp-wave ripples. The mechanisms of selective reactivation, and how degraded reactivation affects memory, are poorly understood. We evaluated hippocampal single-cell activity during physiological and pathological sharp-wave ripples using juxtacellular and intracellular recordings in normal and epileptic rats with different memory abilities. CA1 pyramidal cells participate selectively during physiological events but fired together during epileptic fast ripples...
June 21, 2017: Neuron
https://www.readbyqxmd.com/read/28640694/assessment-of-rectal-tumors-with-shear-wave-elastography-before-surgery-comparison-with-endorectal-us
#19
Li-Da Chen, Wei Wang, Jian-Bo Xu, Jian-Hui Chen, Xin-Hua Zhang, Hui Wu, Jin-Ning Ye, Jin-Ya Liu, Zhi-Qiang Nie, Ming-De Lu, Xiao-Yan Xie
Purpose To compare the value of endorectal ultrasonography (US) with shear-wave elastography (SWE) in staging rectal tumors before surgery. Materials and Methods This prospective study was approved by the institutional review board and written informed consent was obtained. In a pilot cohort from April 2015 to January 2016, 70 patients with rectal adenocarcinomas and/or adenomas confirmed with histopathologic examination underwent both endorectal US and SWE. Tumor stiffness and three regions of reference backgrounds, as well as tumor stiffness ratios (SRs) versus these backgrounds, were analyzed...
June 21, 2017: Radiology
https://www.readbyqxmd.com/read/28639636/hyperbolic-metamaterials-for-dispersion-assisted-directional-light-emission
#20
Lorenzo Ferrari, Joseph Stephen Thomas Smalley, Yeshaiahu Fainman, Zhaowei Liu
A novel method is presented to outcouple high spatial frequency (large-k) waves from hyperbolic metamaterials (HMMs) without the use of a grating. This approach relies exclusively on dispersion engineering, and enables preferential power extraction from the top or from the side of a HMM. Multilayer (ML) HMMs are shown to be better suited for lateral outcoupling, while nanowire HMMs are the most convenient choice for top outcoupling. A 6-fold increase in laterally extracted power is predicted for a dipole-HMM system with a Ag/Si ML operating at λ = 530 nm, when metallic filling ratio is changed from an unoptimized to the optimized one...
June 22, 2017: Nanoscale
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