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https://www.readbyqxmd.com/read/28090030/effect-of-polymerization-cycles-on-flexural-strengths-and-microhardness-of-different-denture-base-materials
#1
Hasan Gungor, Mustafa Gundogdu, Murat Alkurt, Zeynep Yesil Duymus
The purpose of this study was to evaluate the effect of different polymerization cycles on the flexural strengths and microhardness of two denture base materials (Meliodent and Paladent). Heat-polymerized acrylic resin specimens (65.0 mm long×10.0 mm wide×2.5 mm in height) were prepared using different short and long polymerization cycles. After the specimens had been polymerized, they were stored in distilled water at 37±1°C for 24 h. Flexural strength test was performed at a cross-head speed of 5 mm/min and Vickers microhardness was measured...
January 13, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28073085/effect-of-investigator-observation-on-gait-parameters-in-individuals-with-and-without-chronic-low-back-pain
#2
Joshua Vickers, Austin Reed, Robert Decker, Bryan P Conrad, Marissa Olegario-Nebel, Heather K Vincent
Despite the ubiquity of gait assessment in clinic and research, it is unclear how observation impacts gait, particularly in persons with chronic pain and psychological stress. We compared temporal spatial gait patterns in people with and without chronic low back pain (CLBP) when they were aware and unaware of being observed. This was a repeated-measures, deception study in 55 healthy persons (32.0±12.4 yr, 24.2±2.7kg/m(2)) and persons with CLBP (51.9±17.9 yr, 27.8±4.4kg/m(2)). Participants performed one condition in which they were unaware of observation (UNW), and three conditions under investigator observation: (1) aware of observation (AWA), (2) investigators watching cadence, (3) investigators watching step length...
January 3, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28064368/nanostructured-zno-films-on-stainless-steel-are-highly-safe-and-effective-for-antimicrobial-applications
#3
Kyudae Shim, Mohamed Abdellatif, Eunsoo Choi, Dongkyun Kim
The safety and effectiveness of antimicrobial ZnO films must be established for general applications. In this study, the antimicrobial activity, skin irritation, elution behavior, and mechanical properties of nanostructured ZnO films on stainless steel were evaluated. ZnO nanoparticle (NP) and ZnO nanowall (NW) structures were prepared with different surface roughnesses, wettability, and concentrations using an RF magnetron sputtering system. The thicknesses of ZnO NP and ZnO NW were approximately 300 and 620 nm, respectively, and ZnO NW had two diffraction directions of [0002] and [01-10] based on high-resolution transmission electron microscopy...
January 7, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28061744/comprehensive-evaluation-of-extracellular-small-rna-isolation-methods-from-serum-in-high-throughput-sequencing
#4
Yan Guo, Kasey Vickers, Yanhua Xiong, Shilin Zhao, Quanhu Sheng, Pan Zhang, Wanding Zhou, Charles R Flynn
BACKGROUND: DNA and RNA fractions from whole blood, serum and plasma are increasingly popular analytes that are currently under investigation for their utility in the diagnosis and staging of disease. Small non-coding ribonucleic acids (sRNAs), specifically microRNAs (miRNAs) and their variant isoforms (isomiRs), and transfer RNA (tRNA)-derived small RNAs (tDRs) comprise a repertoire of molecules particularly promising in this regard. RESULTS: In this designed study, we compared the performance of various methods and kits for isolating circulating extracellular sRNAs (ex-sRNAs)...
January 7, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28050151/eastern-canadian-gastrointestinal-cancer-consensus-conference-2016
#5
D Bossé, T Ng, C Ahmad, A Alfakeeh, I Alruzug, J Biagi, J Brierley, P Chaudhury, S Cleary, B Colwell, C Cripps, L A Dawson, M Dorreen, E Ferland, P Galiatsatos, S Girard, S Gray, F Halwani, N Kopek, A Mahmud, G Martel, L Robillard, B Samson, M Seal, J Siddiqui, L Sideris, S Snow, M Thirwell, M Vickers, R Goodwin, R Goel, T Hsu, E Tsvetkova, B Ward, T Asmis
The annual Eastern Canadian Gastrointestinal Cancer Consensus Conference 2016 was held in Montreal, Quebec, 5-7 February. Experts in radiation oncology, medical oncology, surgical oncology, and infectious diseases involved in the management of patients with gastrointestinal malignancies participated in presentations and discussion sessions for the purpose of developing the recommendations presented here. This consensus statement addresses multiple topics: ■ Follow-up and survivorship of patients with resected colorectal cancer■ Indications for liver metastasectomy■ Treatment of oligometastases by stereotactic body radiation therapy■ Treatment of borderline resectable and unresectable pancreatic cancer■ Transarterial chemoembolization in hepatocellular carcinoma■ Infectious complications of antineoplastic agents...
December 2016: Current Oncology
https://www.readbyqxmd.com/read/28043160/validation-of-a-dynamic-measure-of-current-cognitive-reserve-in-a-longitudinally-assessed-sample-of-healthy-older-adults
#6
Mathew J Summers, Megan E Thow, David D Ward, Nichole L Saunders, Shannon Z Klekociuk, Abbie-Rose Imlach, Jeffery J Summers, James C Vickers
Cognitive reserve (CR) is a theoretical construct describing the underlying cognitive capacity of an individual that confers differential levels of resistance to, and recovery from, brain injuries of various types. To date, estimates of an individual's level of CR have been based on single proxy measures that are retrospective and static in nature. To develop a measure of dynamic change in CR across a lifetime, we previously identified a latent factor, derived from an exploratory factor analysis of a large sample of healthy older adults, as current CR (cCR)...
January 1, 2017: Assessment
https://www.readbyqxmd.com/read/28040301/associations-of-baseline-depressed-mood-and-happiness-with-subsequent-well-being-in-cardiac-patients
#7
Julia Craner, Kristin Vickers Douglas, Ross Dierkhising, Julie Hathaway, Kashish Goel, Randal J Thomas
RATIONALE: The relationship between depressive symptoms and adverse outcomes for patients with cardiac problems has been well established for several decades. However, less is known about other factors that may influence psychosocial outcomes for cardiac patients. OBJECTIVE: To evaluate the association between baseline happiness and depressed mood on later psychosocial functioning among cardiac patients. METHOD: Participants (N = 250) were patients who had received medical treatment at an academic medical center for a cardiac event...
December 15, 2016: Social Science & Medicine
https://www.readbyqxmd.com/read/28017626/an-examination-of-the-food-allergy-quality-of-life-questionnaire-performance-in-a-countrywide-american-sample-of-children-cross-cultural-differences-in-age-and-impact-in-the-united-states-and-europe
#8
Audrey DunnGalvin, Elizabeth Koman, Elizabeth Raver, Hayley Frome, Melissa Adams, Aisleen Keena, Jonathan O'B Hourihane, Patricia Leahy Gallagher, Bertine Flokstra-de Blok, Anthony Dubois, Katarzyna Pyrz, Cartsen Bindslev-Jensen, Anette Stensgaard, Robert Boyle, Bea Vickers, Jared Smith, Umasunthar Thisanayagam, Matthew Greenhawt
BACKGROUND: It is important to ensure that tools are valid and reliable in the context in which they are used. The development of age and country norms is part of this process. OBJECTIVES: The primary aim of the present study was to examine the performance of the Food Allergy Quality of Life Questionnaire - Parent Form (FAQLQ-PF) in a countrywide American sample of children with food allergy. The secondary aim was to compare age differences in impact across 9 European countries...
December 22, 2016: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28011654/school-based-primary-ncd-risk-reduction-education-and-public-health-perspectives
#9
Jacquie L Bay, Rosemary Hipkins, Kamran Siddiqi, Rumana Huque, Robyn Dixon, Debra Shirley, Karen Tairea, Delaney Yaqona, Amanda Mason-Jones, Mark H Vickers
The rising global burden of noncommunicable diseases (NCDs) has heightened awareness of the necessity for primary risk prevention programmes. These aim to facilitate long-term behaviour changes in children and adolescents that can reduce NCD risk factors and disease onset in later-life. School-based programmes designed to improve childhood and adolescent health behaviours and wellbeing contribute to this; however, design and impact assessment of these is complex. These programmes should be multidisciplinary, utilizing both educational and health expertise...
December 23, 2016: Health Promotion International
https://www.readbyqxmd.com/read/28010811/using-gamm-to-examine-inter-individual-heterogeneity-in-thermal-performance-curves-for-natrix-natrix-indicates-bet-hedging-strategy-by-mothers
#10
Mathew J Vickers, Fabien Aubret, Aurélie Coulon
The thermal performance curve (TPC) illustrates the dependence on body- and therefore environmental- temperature of many fitness-related aspects of ectotherm ecology and biology including foraging, growth, predator avoidance, and reproduction. The typical thermal performance curve model is linear in its parameters despite the well-known, strong, non-linearity of the response of performance to temperature. In addition, it is usual to consider a single model based on few individuals as descriptive of a species-level response to temperature...
January 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28004001/mechanical-properties-of-calcium-fluoride-based-composite-materials
#11
Monika Łukomska-Szymańska, Joanna Kleczewska, Joanna Nowak, Mariusz Pryliński, Agata Szczesio, Magdalena Podlewska, Jerzy Sokołowski, Barbara Łapińska
Aim of the study was to evaluate mechanical properties of light-curing composite materials modified with the addition of calcium fluoride. The study used one experimental light-curing composite material (ECM) and one commercially available flowable light-curing composite material (FA) that were modified with 0.5-5.0 wt% anhydrous calcium fluoride. Morphology of the samples and uniformity of CaF2 distribution were analyzed using Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS). Mechanical properties were tested after 24-hour storage of specimens in dry or wet conditions...
2016: BioMed Research International
https://www.readbyqxmd.com/read/28003486/feline-immunodeficiency-virus-cross-species-transmission-implications-for-emergence-of-new-lentiviral-infections
#12
Justin Lee, Jennifer L Malmberg, Britta A Wood, Sahaja Hladky, Ryan Troyer, Melody Roelke, Mark Cunningham, Roy McBride, Winston Vickers, Walter Boyce, Erin Boydston, Laurel Serieys, Seth Riley, Kevin Crooks, Sue VandeWoude
: Owing to a complex history of host-parasite coevolution, lentiviruses exhibit a high degree of species specificity. Given the well-documented viral archeology of HIV emergence following human exposures to SIV, understanding processes that promote successful cross-species lentiviral transmissions is highly relevant. We have previously reported natural cross-species transmission of a subtype of feline immunodeficiency virus, puma lentivirus A (PLVA), between bobcats (Lynx rufus) and mountain lions (Puma concolor) in a small number of animals in California and Florida...
December 21, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27994319/comparative-evaluation-of-microhardness-of-dentin-treated-with-4-titanium-tetrafluoride-and-1-23-acidic-phosphate-fluoride-gel-before-and-after-exposure-to-acidic-ph-an-ex-vivo-study
#13
Vivek Kandanuru, Koppolu Madhusudhana, Vamsi Krishna Ramachandruni, Harish Madhav Vitta, Lenin Babu
AIM: The aim of this study was to comparatively evaluate the effect of 4% titanium tetrafluoride (TiF4) and 1.23% acidic phosphate fluoride (APF) gel on the microhardness of human coronal dentin. MATERIALS AND METHODS: Thirty noncarious extracted premolars were collected and sectioned buccolingually with the help of diamond disk. Exposing the sectioned surface, teeth were embedded in self-cure acrylic. Exposed coronal dentin was polished with abrasive papers starting with 220-5000 grit...
November 2016: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/27988440/evaluation-of-the-mechanical-properties-of-powder-metallurgy-ti-6al-7nb-alloy
#14
L Bolzoni, E M Ruiz-Navas, E Gordo
Titanium and its alloys are common biomedical materials owing to their combination of mechanical properties, corrosion resistance and biocompatibility. Powder metallurgy (PM) techniques can be used to fabricate biomaterials with tailored properties because changing the processing parameters, such as the sintering temperature, products with different level of porosity and mechanical performances can be obtained. This study addresses the production of the biomedical Ti-6Al-7Nb alloy by means of the master alloy addition variant of the PM blending elemental approach...
December 9, 2016: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/27987709/synthesis-characterization-and-bioactivity-of-a-calcium-phosphate-glass-ceramics-obtained-by-the-sol-gel-processing-method
#15
Nouha Jmal, Jamel Bouaziz
In this work, a calcium-phosphate glass-ceramics was successfully obtained by heat treatment of a mixture of 26.52 in wt.% of fluorapatite (Fap) and 73.48 in wt.% of 77S (77 SiO214 CaO9 P2O5 in wt.%) gel. The calcium phosphate-glass-ceramics was prepared by sol-gel process with tetraethyl orthosilicate (TEOS), triethyl phosphate (TEP), calcium nitrate and fluorapatite. The synthesized powders were characterized by some commonly used tools such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), (31)P magic angle spinning nuclear magnetic resonance (MAS-NMR), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and thin-film X-ray diffraction (TF-XRD)...
February 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27987205/mid-life-environmental-enrichment-increases-synaptic-density-in-ca1-in-a-mouse-model-of-a%C3%AE-associated-pathology-and-positively-influences-synaptic-and-cognitive-health-in-healthy-ageing
#16
Kimberley E Stuart, Anna E King, Carmen M Fernandez-Martos, Justin Dittmann, Mathew J Summers, James C Vickers
Early-life cognitive enrichment may reduce the risk of experiencing cognitive deterioration and dementia in later-life. However, an intervention to prevent or delay dementia is likely to be taken up in mid to later-life. Hence, we investigated the effects of environmental enrichment in wildtype mice and in a mouse model of Aβ neuropathology (APPSWE /PS1dE9 ) from 6 months of age. After 6 months of housing in standard laboratory cages, APPSWE /PS1dE9 (n = 27) and healthy wildtype (n = 21) mice were randomly assigned to either enriched or standard housing...
December 17, 2016: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/27984664/sonofragmentation-of-ionic-crystals
#17
Hyo Na Kim, Kenneth S Suslick
Mechanochemistry deals with the interface between the chemical and the mechanical worlds and explores the physical and chemical changes in materials caused by an input of mechanical energy. As such, the chemical and physical effects of ultrasound, i.e., sonochemistry, are forms of mechanochemistry. In this paper, fragmentation of ionic crystals during ultrasonic irradiation of slurries has been quantitatively investigated: the rate of fragmentation depends strongly on the strength of the materials (as measured by Vickers hardness or by Young's modulus)...
December 16, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27972404/comparative-efficacy-and-saftey-of-interventions-in-the-treatment-of-advanced-soft-tissue-sarcoma-a-systematic-review-and-network-meta-analysis
#18
D Bertwistle, Y D'Yachkova, A D Vickers, E Hawe, M Fernandez, N Drove, M Lorenzo, S Wolowacz
No abstract text is available yet for this article.
November 2016: Value in Health: the Journal of the International Society for Pharmacoeconomics and Outcomes Research
https://www.readbyqxmd.com/read/27966511/comparative-evaluation-of-application-of-different-fluoride-varnishes-on-artificial-early-enamel-lesion-an-in-vitro-study
#19
Udita Majithia, Karthik Venkataraghavan, Prashant Choudhary, Krishna Trivedi, Shalin Shah, Mira Virda
INTRODUCTION: In an attempt to manage noncavitated carious lesions noninvasively through remineralization, a range of novel fluoride varnishes with additional remineralizing agents have been made available for clinical application. AIM AND OBJECTIVES: The aim of this study was to compare and evaluate the remineralization potential of three commercially available varnishes on artificial enamel lesions. MATERIALS AND METHODS: This in vitro study involves eighty intact enamel specimens prepared from premolars extracted for orthodontic purposes...
September 2016: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/27965842/a-head-and-neck-cancer-intervention-for-use-in-survivorship-clinics-a-protocol-for-a-feasibility-study
#20
Talya Salz, Mary S McCabe, Kevin C Oeffinger, Stacie Corcoran, Andrew J Vickers, Andrew L Salner, Ellen Dornelas, Rebecca Schnall, Nirupa J Raghunathan, Elizabeth Fortier, Shrujal S Baxi
BACKGROUND: Head and neck cancer survivors commonly experience severe long-term toxicities, late-occurring symptoms, and significant risks of the second primary malignancy and comorbid illnesses. With multiple simultaneous health issues, these complex cancer survivors often do not receive comprehensive health care that addresses their needs. A tool is needed to streamline and standardize comprehensive care for this cohort. METHODS/DESIGN: We designed the Head and Neck Survivorship Tool: Assessment and Recommendations (HN-STAR) to address health care challenges for head and neck cancer survivors...
2016: Pilot and Feasibility Studies
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