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https://www.readbyqxmd.com/read/28527193/comparison-of-digital-intraoral-scanners-by-single-image-capture-system-and-full-color-movie-system
#1
Meguru Yamamoto, Yu Kataoka, Atsufumi Manabe
BACKGROUND: The use of dental computer-aided design/computer-aided manufacturing (CAD/CAM) restoration is rapidly increasing. OBJECTIVE: This study was performed to evaluate the marginal and internal cement thickness and the adhesive gap of internal cavities comprising CAD/CAM materials using two digital impression acquisition methods and micro-computed tomography. METHODS: Images obtained by a single-image acquisition system (Bluecam Ver...
2017: Bio-medical Materials and Engineering
https://www.readbyqxmd.com/read/28526346/release-study-and-inhibitory-activity-of-thyme-essential-oil-loaded-chitosan-nanoparticles-and-nanocapsules-against-foodborne-bacteria
#2
M Sotelo-Boyás, Z Correa-Pacheco, S Bautista-Baños, Y Gómez Y Gómez
The antibacterial property of thyme essential oil due to different volatile compounds, has been well documented in the literature. To overcome the high volatility of essential oil components, encapsulation has emerged as a new alternative. In this work, chitosan and thyme essential oil-loaded chitosan nanoparticles (TEO-CSNPs) and nanocapsules (TEO-CSNCs) were prepared by nanoprecipitation and nanoencapsulation, respectively. The morphology, encapsulation efficiency, release kinetics, and inhibitory activity were evaluated...
May 16, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28526048/men-s-and-women-s-response-to-treatment-and-perceptions-of-outcomes-in-a-randomized-controlled-trial-of-injectable-opioid-assisted-treatment-for-severe-opioid-use-disorder
#3
Heather Palis, Kirsten Marchand, Daphne Guh, Suzanne Brissette, Kurt Lock, Scott MacDonald, Scott Harrison, Aslam H Anis, Michael Krausz, David C Marsh, Martin T Schechter, Eugenia Oviedo-Joekes
BACKGROUND: To test whether there are gender differences in treatment outcomes among patients receiving injectable opioids for the treatment of long-term opioid-dependence. The study additionally explores whether men and women have different perceptions of treatment effectiveness. METHODS: This study is a secondary analysis from SALOME, a double-blind, phase III, randomized controlled trial testing the non-inferiorirty of injectable hydromorphone to injectable diacetylmorphine among 202 long-term street opioid injectors in Vancouver (Canada)...
May 19, 2017: Substance Abuse Treatment, Prevention, and Policy
https://www.readbyqxmd.com/read/28524851/extended-fisheries-recovery-timelines-in-a-changing-environment
#4
Gregory L Britten, Michael Dowd, Lisa Kanary, Boris Worm
Rebuilding depleted fish stocks is an international policy goal and a 2020 Aichi target under the Convention on Biological Diversity. However, stock productivity may shift with future climate change, with unknown consequences for sustainable harvesting, biomass targets and recovery timelines. Here we develop a stochastic modelling framework to characterize variability in the intrinsic productivity parameter (r) and carrying capacity (K) for 276 global fish stocks worldwide. We use models of dynamic stock productivity fitted via Bayesian inference to forecast rebuilding timelines for depleted stocks...
May 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28523465/development-and-validation-of-a-cross-country-hospital-patient-quality-of-care-assessment-tool-in-europe
#5
Amanda Villiers-Tuthill, Karolina Doulougeri, Hannah McGee, Anthony Montgomery, Efharis Panagopoulou, Karen Morgan
BACKGROUND: Patient perceptions of quality of care (QoC) are directly linked with patient safety and clinical effectiveness. We need patient-designed QoC instruments that work across languages and countries to optimise studies across systems in this area. Few QoC measurement tools exist that assess all aspects of QoC from the patient perspective. This paper describes the development and validation of a comprehensive measure to assess patient perceptions of QoC that incorporates technical and interpersonal aspects of care and is grounded in the established Institute of Medicine (IOM) QoC framework...
May 18, 2017: Patient
https://www.readbyqxmd.com/read/28521219/antifouling-zwitterionic-hydrogel-coating-improves-hemocompatibility-of-activated-carbon-hemoadsorbent
#6
Nana Cai, Qingsi Li, Jiamin Zhang, Tong Xu, Weiqiang Zhao, Jing Yang, Lei Zhang
Activated carbon has been widely used in hemoperfusion treatments. However, its performance has been significantly compromised by their poor hemocompatibility. In this work, we developed a novel antifouling adsorbent based on zwitterionic poly-carboxybetaine (PCB) hydrogel and powdered activated carbon (PAC) to improve hemocompatibility. We found this new adsorbent (PCB-PAC) was highly stable with negligible leakage of activated carbon debris. It could efficiently resist protein adsorption and avoid any hemolysis effect...
April 20, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28515947/the-impact-of-body-armor-on-physical-performance-of-law-enforcement-personnel-a-systematic-review
#7
Colin Tomes, Robin Marc Orr, Rodney Pope
BACKGROUND: The law enforcement officer profession requires performance of arduous occupational tasks while carrying an external load, consisting of, at minimum, a chest rig, a communication system, weaponry, handcuffs, personal protective equipment and a torch. The aim of this systematic review of the literature was to identify and critically appraise the methodological quality of published studies that have investigated the impacts of body armour on task performance and to synthesize and report key findings from these studies to inform law enforcement organizations...
2017: Annals of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28515734/plant-growth-under-natural-light-conditions-provides-highly-flexible-short-term-acclimation-properties-toward-high-light-stress
#8
Tobias Schumann, Suman Paul, Michael Melzer, Peter Dörmann, Peter Jahns
Efficient acclimation to different growth light intensities is essential for plant fitness. So far, most studies on light acclimation have been conducted with plants grown under different constant light regimes, but more recent work indicated that acclimation to fluctuating light or field conditions may result in different physiological properties of plants. Thale cress (Arabidopsis thaliana) was grown under three different constant light intensities (LL: 25 μmol photons m(-2) s(-1); NL: 100 μmol photons m(-2) s(-)(1); HL: 500 μmol photons m(-2) s(-1)) and under natural fluctuating light (NatL) conditions...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28514190/criterion-referenced-fitness-standards-associated-with-maintaining-functional-capacity-in-chilean-older-adults
#9
Eugenio Merellano-Navarro, Daniel Collado-Mateo, Javier García-Rubio, Narcís Gusi, Pedro R Olivares
The aim of the current study was to develop fitness standards associated with maintaining physical capacity in older adults at two different levels - that needed for advanced functioning and that needed for maintaining moderate (independent) functional ability. Cross-sectional study of 406 Chilean adults aged 60 and more. Functional capacity was measured via the Composite Physical Function scale (CPF). A battery of validated fitness tests for this population was used. Based on the results of the CPF, two variables were created: "advanced physical capacity" (defined as those scoring 24 on the CPF scale) and "moderate (independent) physical capacity," defined as those scoring between 14 and 23 on the CPF scale...
May 17, 2017: Rejuvenation Research
https://www.readbyqxmd.com/read/28513264/body-composition-analysis-by-using-bioelectrical-impedance-in-a-young-healthy-chinese-population-methodological-considerations
#10
Wei Chen, Hua Jiang, Jiong-Xian Yang, Hao Yang, Jing-Min Liu, Xiu-Yuan Zhen, Lian-Jun Feng, Jian-Chun Yu
OBJECTIVE: To develop a new bioelectrical impedance analysis (BIA) model for analyzing body composition by using isotope dilution, magnetic resonance imaging (MRI), and dual-energy X-ray absorptiometry (DEXA) as the reference methods in young healthy Chinese populations. METHODS: Thirty healthy participants were enrolled. Their body composition was analyzed using BIA and 3 reference methods. We established a model that uniformed data from 3 references methods (isotope, MRI, and DEXA) into 1 formula...
June 2017: Food and Nutrition Bulletin
https://www.readbyqxmd.com/read/28513207/evolutionary-developmental-robotics-improving-morphology-and-control-of-physical-robots
#11
Vuk Vujovic, Andre Rosendo, Luzius Brodbeck, Fumiya Iida
Evolutionary algorithms have previously been applied to the design of morphology and control of robots. The design space for such tasks can be very complex, which can prevent evolution from efficiently discovering fit solutions. In this article we introduce an evolutionary-developmental (evo-devo) experiment with real-world robots. It allows robots to grow their leg size to simulate ontogenetic morphological changes, and this is the first time that such an experiment has been performed in the physical world...
May 17, 2017: Artificial Life
https://www.readbyqxmd.com/read/28509562/thiolate-spin-population-of-type-i-copper-in-azurin-derived-from-33-s-hyperfine-coupling
#12
Marie Ramirez Cohen, Netanel Mendelman, Marina Radoul, Tiffany D Wilson, Masha G Savelieff, Herbert Zimmermann, Ilia Kaminker, Akiva Feintuch, Yi Lu, Daniella Goldfarb
The electron transfer mediating properties of type I copper proteins stem from the intricate ligand coordination sphere of the Cu ion in their active site. These redox properties are in part due to unusual cysteine thiol coordination, which forms a highly covalent copper-sulfur (Cu-S) bond. The structure and electronic properties of type I copper have been the subject of many experimental and theoretical studies. The measurement of spin delocalization of the Cu(II) unpaired electron to neighboring ligands provides an elegant experimental way to probe the fine details of the electronic structure of type I copper...
May 16, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28508297/adaptation-to-stochastic-temporal-variations-in-intratumoral-blood-flow-the-warburg-effect-as-a-bet-hedging-strategy
#13
Curtis A Gravenmier, Miriam Siddique, Robert A Gatenby
While most cancers promote ingrowth of host blood vessels, the resulting vascular network usually fails to develop a mature organization, resulting in abnormal vascular dynamics with stochastic variations that include slowing, cessation, and even reversal of flow. Thus, substantial spatial and temporal variations in oxygen concentration are commonly observed in most cancers. Cancer cells, like all living systems, are subject to Darwinian dynamics such that their survival and proliferation are dependent on developing optimal phenotypic adaptations to local environmental conditions...
May 15, 2017: Bulletin of Mathematical Biology
https://www.readbyqxmd.com/read/28506009/structural-equation-model-of-interactions-between-risk-factors-and-work-related-musculoskeletal-complaints-among-iranian-hospital-nurses
#14
Semira Mehralizadeh, Alireza Dehdashti, Masoud Motaelebi Kashani
BACKGROUND: Statistics indicate a high risk of developing work-related musculoskeletal disorders among hospital nurses. The challenge is to understand the associations between musculoskeletal symptoms and various individual and occupational risk factors. OBJECTIVE: This study examined the direct and indirect interactions of various risk factors with musculoskeletal complaints in hospital nurses. METHOD: In a cross-sectional design, Iranian hospital nurses from Semnan University of Medical Sciences participated in a questionnaire survey reporting their perceived perceptions of various work-related risk factors and musculoskeletal symptoms...
May 6, 2017: Work: a Journal of Prevention, Assessment, and Rehabilitation
https://www.readbyqxmd.com/read/28505152/a-predictive-coding-account-of-bistable-perception-a-model-based-fmri-study
#15
Veith Weilnhammer, Heiner Stuke, Guido Hesselmann, Philipp Sterzer, Katharina Schmack
In bistable vision, subjective perception wavers between two interpretations of a constant ambiguous stimulus. This dissociation between conscious perception and sensory stimulation has motivated various empirical studies on the neural correlates of bistable perception, but the neurocomputational mechanism behind endogenous perceptual transitions has remained elusive. Here, we recurred to a generic Bayesian framework of predictive coding and devised a model that casts endogenous perceptual transitions as a consequence of prediction errors emerging from residual evidence for the suppressed percept...
May 15, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28504529/the-cause-of-category-based-distortions-in-spatial-memory-a-distribution-analysis
#16
Cristina Sampaio, Ranxiao Frances Wang
Recall of remembered locations reliably reflects a compromise between a target's true position and its region's prototypical position. The effect is quite robust, and a standard interpretation for these data is that the metric and categorical codings blend in a Bayesian combinatory fashion. However, there has been no direct experimental evidence that the 2 codings are actually combined. That is, at least 2 mechanisms can produce biased mean responses: (a) people may in fact take a weighted average of the metric and categorical representations, but (b) these 2 codings may instead compete for response, each winning with a certain probability...
May 15, 2017: Journal of Experimental Psychology. Learning, Memory, and Cognition
https://www.readbyqxmd.com/read/28502905/inhibition-of-proinflammatory-mediators-by-coumaroyl-lupendioic-acid-a-new-lupane-type-triterpene-from-careya-arborea-on-inflammation-induced-animal-model
#17
Rayhana Begum, Manjur Ali Sheliya, Showkat R Mir, Ekta Singh, Manju Sharma
ETHNOPHARMACOLOGICAL RELEVANCE: Careya arborea Roxb. (Lecythidaceae) is a large tree found throughout India in deciduous forests and grasslands. C. arborea is traditionally used in tumors, inflammation, anthelmintic, bronchitis, epileptic fits, astringents, antidote to snake-venom, skin disease, diarrhea, dysentery with bloody stools, dyspepsia, ulcer, tooth ache, and ear pain. AIM OF THE STUDY: In our previous work, the methanolic extract of Careya arborea stem bark showed significant anti-inflammatory activity...
May 11, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28502819/functional-relevance-of-mirnas-in-premature-ageing
#18
REVIEW
Xurde M Caravia, David Roiz-Valle, Alba Morán-Álvarez, Carlos López-Otín
Ageing is a complex biological process characterized by the progressive loss of biological fitness due to the accumulation of macromolecular and cellular damage that affects most living organisms. Moreover, ageing is an important risk factor for many pathologies, including cardiovascular diseases, neurological disorders, and cancer. However, the ageing rate can be modulated by genetic, nutritional, and pharmacological factors, highlighting the concept of "ageing plasticity". Progeroid syndromes are a group of rare genetic diseases that resemble many characteristics of physiological ageing...
May 11, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28501641/facile-preparation-of-3d-go-cncs-composite-with-adsorption-performance-towards-bmim-cl-from-aqueous-solution
#19
Hua Zhou, Bin Gao, Yanmei Zhou, Han Qiao, Wenli Gao, Haonan Qu, Shanhu Liu, Qingyou Zhang, Xiaoqiang Liu
A novel three-dimensional crumpled graphene oxide/cellulose nanocrystals (GO/CNCs) composite was successfully synthesized and firstly used as adsorbent for the removal of ionic liquid [BMIM][Cl] from aqueous solution. The 3D crumpled structure and abundant oxygen of the functional groups on GO/CNCs composite can provide more chance for the sorption of [BMIM][Cl] compared with CNCs and GO, respectively. Therefore, a series of batch experiments were carried out to evaluate the adsorptive property of 3D GO/CNCs composite towards [BMIM][Cl], such as the GO mass content, the pH value and contact time...
May 3, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28501585/proteolytic-post-translational-processing-of-adhesins-in-the-plant-pathogen-spiroplasma-citri
#20
Marie-Pierre Dubrana, Julia Guéguéniat, Clothilde Bertin, Sybille Duret, Nathalie Arricau-Bouvery, Stéphane Claverol, Carole Lartigue, Alain Blanchard, Joël Renaudin, Laure Béven
Mollicutes, including mycoplasmas and spiroplasmas have been considered as good representatives of the « minimal cell » concept: these wall-less bacteria are small in size, possess a minimal genome, and restricted metabolic capacities. However the recent discovery of the presence of post-translational modifications unknown so far, such as the targeted processing of membrane proteins of mycoplasma pathogens for human and swine, revealed a part of the hidden complexity of these microorganisms. In this study, we show that in the phytopathogen, insect-vectored, Spiroplasma citri ScARPs adhesins are post-translationally processed through an ATP-dependent targeted cleavage...
May 10, 2017: Journal of Molecular Biology
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