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https://www.readbyqxmd.com/read/28642912/influence-of-10-sodium-ascorbate-gel-application-time-on-composite-bond-strength-to-bleached-enamel
#1
Cintia Gaio Murad, Suellen Nunes de Andrade, Lucio Ramos Disconzi, Eliseu Aldrighi Munchow, Evandro Piva, Renata Correa Pascotto, Sandra Kiss Moura
Objective To analyze bond strength to bleached enamel following application of 10% sodium ascorbate gel. Material and methods Forty third molars were allocated into five groups (n = 8): GP - unbleached specimens restored with composite resin; GN - specimens restored immediately after bleaching; and G15; G30 and G60 (test groups) - bleached specimens treated with 10% sodium ascorbate gel for 15, 30 and 60 min before restoration. The teeth were sectioned and the buccal and lingual faces were restored. After storage in distilled water (37 °C/24 h), sticks of ±0...
December 2016: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28641182/unraveling-the-complexities-of-the-velocity-dependency-of-e-coli-retention-and-release-parameters-in-saturated-porous-media
#2
Salini Sasidharan, Scott A Bradford, Saeed Torkzaban, Xueyan Ye, Joanne Vanderzalm, Xinqiang Du, Declan Page
Escherichia coli transport and release experiments were conducted to investigate the pore-water velocity (v) dependency of the sticking efficiency (α), the fraction of the solid surface area that contributed to retention (Sf), the percentage of injected cells that were irreversibly retained (Mirr), and cell release under different (10-300mM) ionic strength (IS) conditions. Values of α, Sf, and Mirr increased with increasing IS and decreasing v, but the dependency on v was greatest at intermediate IS (30 and 50mM)...
June 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28640618/dynamic-roughness-ratio-based-framework-for-modeling-mixed-mode-of-droplet-evaporation
#3
Madhu Ranjan Gunjan, Rishi Raj
The spatio-temporal evolution of an evaporating sessile droplet and its effect on lifetime is crucial to various disciplines of science and technology. While experimental investigations suggest three distinct modes through which a droplet evaporates, namely, the constant contact radius (CCR), the constant contact angle (CCA), and the mixed, only the CCR and the CCA modes have been modeled reasonably. Here we use experiments with water droplets on flat and micropillared silicon substrates to characterize the mixed mode...
June 22, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28638548/dentin-bonding-agent-with-improved-bond-strength-to-dentin-through-incorporation-of-sepiolite-nanoparticles
#4
Farnoosh Fallahzadeh, Shadab Safarzadeh-Khosroshahi, Mohammad Atai
BACKGROUND: The study aims to investigate the effect of incorporation of sepiolite nanoparticles on the microtensile bond strength of an experimental dentin bonding to the human dentin. MATERIAL AND METHODS: The sepiolite nanoparticles were incorporated into an experimental methacrylate-based dentin bonding system in concentrations of 0.0, 0.2, 1.0, 2.0, and 5.0 weight percents. The specimens were then ultrasonicated to finely disperse the nanoparticles in the adhesive matrix...
June 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28637374/facial-emotion-recognition-in-parkinson-s-disease-association-with-age-and-olfaction
#5
S Kalampokini, E Lyros, M Luley, J Schöpe, J Spiegel, J Bürmann, U Dillmann, K Fassbender, M M Unger
OBJECTIVE: The ability to recognize facial emotion expressions has been reported to be impaired in Parkinson's disease (PD), yet previous studies showed inconsistent findings. The aim of this study was to further investigate facial emotion recognition (FER) in PD patients and its association with demographic and clinical parameters (including motor and nonmotor symptoms). METHOD: Thirty-four nondemented PD patients and 24 age- and sex-matched healthy controls (HC) underwent clinical neurological and neuropsychological assessment, standardized olfactory testing with Sniffin' Sticks, and the Ekman 60 Faces Emotion Recognition Test...
June 21, 2017: Journal of Clinical and Experimental Neuropsychology
https://www.readbyqxmd.com/read/28637344/nicotine-delivery-to-the-aerosol-of-a-heat-not-burn-tobacco-product-comparison-with-a-tobacco-cigarette-and-e-cigarettes
#6
Konstantinos E Farsalinos, Nikoletta Yannovits, Theoni Sarri, Vassilis Voudris, Konstantinos Poulas
Introduction: The purpose was to measure nicotine levels to the tobacco and levels emitted to the aerosol of a heat-not-burn product (HnB, IQOS) compared to e-cigarettes (ECs) and a tobacco cigarette. Methods: The HnB device and regular and menthol sticks were purchased from Italy. Three types of ECs (ciga-like, eGo-style and variable wattage) and a commercially-available tobacco cigarette were also tested. A custom-made liquid containing 2% nicotine was used with ECs...
June 16, 2017: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/28635219/-olfactory-function-in-children-with-adenoid-hypertrophy-who-underwent-adenotonsillectomy-during-pre-and-post-operative-period
#7
H G Pan, H Yang, G W Chen, L Li, Z B Wu, J M Wang
Objective: To assess the olfactory function in children with adenoid hypertrophy and investigate the changes of both olfactory function and appetite in children with adenoid hypertrophy before and after adenoidectomy. Methods: Forty-four children with adenoid hypertrophy admitted for adenoidectomy, aged 7-12 years, mean age (10.0±2.0) years were tested by Sniffin' Sticks test and visual analog scale(VAS) of the children's appetite preoperatively between March and August 2015.In a appointment 6 months after operation, all of them returned and were tested again...
June 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/28632140/thermal-stability-and-rheological-properties-of-the-non-stick-caf1-biomaterial
#8
Yakup Ulusu, Gema Dura, Helen Waller, Matthew Benning, David Fulton, Jeremy Lakey, Daniel Thomas Peters
The ability to culture cells in three dimensions has many applications, from drug discovery to wound healing. 3D cell culture methods often require appropriate scaffolds that mimic the cellular environments of different tissue types. The choice of material from which these scaffolds are made is of paramount importance, as its properties will define the manner in which cells interact with the scaffold. Caf1 is a protein polymer that is secreted from its host organism, Yersinia pestis, to enable escape from phagocytosis...
June 20, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28630417/ultrarapid-measurement-of-diagnostic-antibodies-by-magnetic-capture-of-immune-complexes
#9
Peter D Burbelo, Sreenivasulu Gunti, Jason M Keller, Caryn G Morse, Steven G Deeks, Michail S Lionakis, Amit Kapoor, Qingxue Li, Jeffrey I Cohen, Abner L Notkins, Ilias Alevizos
Rapid point-of-care, antibody-based testing is not currently available for the diagnosis of most autoimmune and infectious diseases. Here we report a simple, robust and ultrafast fluid-phase immunocapture method for clinical measurements of antibody levels. This method employs neodymium magnetic sticks that capture protein A/G-coated paramagnetic beads bound to antibody-luciferase-labeled antigen complexes. We demonstrate the ability to effectively measure specific antibody levels in serum samples from patients with varied infectious or autoimmune disorders, and in the case of Sjögren's syndrome directly in saliva, requiring about a minute per assay...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28630306/heat-exchange-between-a-bouncing-drop-and-a-superhydrophobic-substrate
#10
Samira Shiri, James C Bird
The ability to enhance or limit heat transfer between a surface and impacting drops is important in applications ranging from industrial spray cooling to the thermal regulation of animals in cold rain. When these surfaces are micro/nanotextured and hydrophobic, or superhydrophobic, an impacting drop can spread and recoil over trapped air pockets so quickly that it can completely bounce off the surface. It is expected that this short contact time limits heat transfer; however, the amount of heat exchanged and precise role of various parameters, such as the drop size, are unknown...
June 19, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28627870/encapsulation-of-autoinducer-sensing-reporter-bacteria-in-reinforced-alginate-based-microbeads
#11
Ping Li, Mareike Müller, Matthew Wook Chang, Martin Frettlöh, Holger Schönherr
Quorum sensing, in which bacteria communities use signaling molecules for inter- and intracellular communication, has been intensively studied in recent decades. In order to fabricate highly sensitive easy-to-handle point of care biosensors that detect quorum sensing molecules, we have developed, as is reported here, reporter bacteria entrapped alginate-methacrylate (alginate-MA) hydrogel beads. The alginate-MA beads, which were obtained by electrostatic extrusion, were reinforced by photo-crosslinking to increase stability and thereby to reduce bacteria leaching...
June 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28627246/how-much-hemolysis-is-acceptable-when-undertaking-deep-lancing-for-finger-stick-derived-capillary-plasma-glucose-measurement
#12
Helen Heenan, Helen Lunt, Huan Chan, Chris M Frampton
No abstract text is available yet for this article.
January 1, 2017: Journal of Diabetes Science and Technology
https://www.readbyqxmd.com/read/28621928/aluminum-oxy-hydroxide-nanosticks-synthesized-in-bicontinuous-reverse-microemulsion-have-potent-vaccine-adjuvant-activity
#13
Xu Li, Stephanie Hufnagel, Haiyue Xu, Solange A Valdes, Sachin G Thakkar, Zhengrong Cui, Hugo Celio
Insoluble aluminum salts such as aluminum (oxy)hydroxide are commonly used vaccine adjuvants. Recently, there is evidence suggesting that the adjuvant activity of aluminum salt-based materials is tightly related to their physico-chemical properties, including nanometer-scale size, shape with long aspect ratio, and low degree of crystallinity. Herein, for the first time, the bicontinuous reverse microemulsion (RM) technique was utilized to synthesize stick-like monodisperse aluminum (oxy)hydroxide nanoparticles with a long aspect ratio of ~10, length of ~80 nm and low degree of crystallinity (denoted as Al-nanosticks)...
June 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28618505/forces-and-torques-on-rigid-inclusions-in-an-elastic-environment-resulting-matrix-mediated-interactions-displacements-and-rotations
#14
Mate Puljiz, Andreas M Menzel
Embedding rigid inclusions into elastic matrix materials is a procedure of high practical relevance, for instance, for the fabrication of elastic composite materials. We theoretically analyze the following situation. Rigid spherical inclusions are enclosed by a homogeneous elastic medium under stick boundary conditions. Forces and torques are directly imposed from outside onto the inclusions or are externally induced between them. The inclusions respond to these forces and torques by translations and rotations against the surrounding elastic matrix...
May 2017: Physical Review. E
https://www.readbyqxmd.com/read/28618493/simple-wealth-distribution-model-causing-inequality-induced-crisis-without-external-shocks
#15
Henri Benisty
We address the issue of the dynamics of wealth accumulation and economic crisis triggered by extreme inequality, attempting to stick to most possibly intrinsic assumptions. Our general framework is that of pure or modified multiplicative processes, basically geometric Brownian motions. In contrast with the usual approach of injecting into such stochastic agent models either specific, idiosyncratic internal nonlinear interaction patterns or macroscopic disruptive features, we propose a dynamic inequality model where the attainment of a sizable fraction of the total wealth by very few agents induces a crisis regime with strong intermittency, the explicit coupling between the richest and the rest being a mere normalization mechanism, hence with minimal extrinsic assumptions...
May 2017: Physical Review. E
https://www.readbyqxmd.com/read/28615827/selfie-stick-an-extension-of-the-photographer-s-hand-in-operation-room-conditions
#16
Ayse Sencan, Mehmet Baydar, Kahraman Ozturk, Osman Orman
No abstract text is available yet for this article.
January 2017: Indian Journal of Plastic Surgery: Official Publication of the Association of Plastic Surgeons of India
https://www.readbyqxmd.com/read/28615816/use-of-selfie-sticks-and-iphones-to-record-operative-photos-and-videos-in-plastic-surgery
#17
Ashok Basur Chandrappa, Pradeep Kumar Nagaraj, Srikanth Vasudevan, Anantheswar Yelampalli Nagaraj, Krithika Jagadish, Ankit Shah
Use of smartphone has become ubiquitous. With smartphone cameras becoming powerful, they are replacing digital cameras and digital SLRs as primary instruments to take photos and record videos. It is natural even for plastic surgeons that smartphones are handy to take still photographs and even record high-definition or 4K videos. Another invention which has become popular with smartphone photography is a selfie stick. We explain the possibility and methodology of using an iPhone and selfie stick to take operative photographs and high-quality videos...
January 2017: Indian Journal of Plastic Surgery: Official Publication of the Association of Plastic Surgeons of India
https://www.readbyqxmd.com/read/28612852/the-bouncing-threshold-in-silica-nanograin-collisions
#18
Maureen L Nietiadi, Philipp Umstätter, Tiffany Tjong, Yudi Rosandi, Emmanuel N Millán, Eduardo M Bringa, Herbert M Urbassek
Using molecular dynamics simulations, we study collisions between amorphous silica nanoparticles. Our silica model contains uncontaminated surfaces, that is, the effect of surface hydroxylation or of adsorbed water layers is excluded. For central collisions, we characterize the boundary between sticking and bouncing collisions as a function of impact velocity and particle size and quantify the coefficient of restitution. We show that the traditional Johnson-Kendall-Roberts (JKR) model provides a valid description of the ingoing trajectory of two grains up to the moment of maximum compression...
June 14, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28611855/variables-to-predict-nephrological-disease-in-general-and-glomerulonephritis-in-particular-in-patients-with-microhematuria
#19
Carsten Paul Bramlage, Manuel Wallbach, David Ellenberger, Cornelia Deutsch, Joan Minguet, Katherine Helen Smith, Johanna Stock, Alina Goninski, Peter Bramlage, Michael Koziolek, Gerhard Anton Mueller
BACKGROUND: Microhematuria (MH) is a symptom frequently leading to uncertainty as to when a nephrology referral is appropriate. Because MH may be indicative of severe kidney disorders, prompt diagnosis and potential treatment initiation can be important. We aimed to identify further variables that point at a nephrological cause, in particular of glomerulonephritis (GN), when MH is diagnosed. METHODS: A retrospective analysis of data acquired from patients attending a nephrology office due to MH was performed...
July 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/28611559/pediatric-tourette-syndrome-a-tic-disorder-with-a-tricky-presentation
#20
Qurratul Warsi, Caroline Kirby, Mirza Beg
Dysphagia is a condition in which disruption of the swallowing process interferes with a patient's ability to eat. This may result in coughing or choking while swallowing, food sticking in the throat, or globus sensation. Eosinophilic esophagitis (EoE) is a chronic immune-mediated disease with a varied clinical spectrum of symptoms including dysphagia. Tourette syndrome (TS) is an inherited neurological disorder that manifests itself as a series of motor and vocal tics and may include oropharyngeal dysphagia...
January 2017: Case Reports in Gastroenterology
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