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https://www.readbyqxmd.com/read/28350936/screening-for-celiac-disease-us-preventive-services-task-force-recommendation-statement
#1
Kirsten Bibbins-Domingo, David C Grossman, Susan J Curry, Michael J Barry, Karina W Davidson, Chyke A Doubeni, Mark Ebell, John W Epling, Jessica Herzstein, Alex R Kemper, Alex H Krist, Ann E Kurth, C Seth Landefeld, Carol M Mangione, Maureen G Phipps, Michael Silverstein, Melissa A Simon, Chien-Wen Tseng
Importance: Celiac disease is caused by an immune response in persons who are genetically susceptible to dietary gluten, a protein complex found in wheat, rye, and barley. Ingestion of gluten by persons with celiac disease causes immune-mediated inflammatory damage to the small intestine. Objective: To issue a new US Preventive Services Task Force (USPSTF) recommendation on screening for celiac disease. Evidence Review: The USPSTF reviewed the evidence on the accuracy of screening in asymptomatic adults, adolescents, and children; the potential benefits and harms of screening vs not screening and targeted vs universal screening; and the benefits and harms of treatment of screen-detected celiac disease...
March 28, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28350890/quantification-of-motor-network-dynamics-in-parkinson-s-disease-by-means-of-landscape-and-flux-theory
#2
Han Yan, Jin Wang
The basal ganglia neural circuit plays an important role in motor control. Despite the significant efforts, the understanding of the principles and underlying mechanisms of this modulatory circuit and the emergence of abnormal synchronized oscillations in movement disorders is still challenging. Dopamine loss has been proved to be responsible for Parkinson's disease. We quantitatively described the dynamics of the basal ganglia-thalamo-cortical circuit in Parkinson's disease in terms of the emergence of both abnormal firing rates and firing patterns in the circuit...
2017: PloS One
https://www.readbyqxmd.com/read/28345895/asymmetric-anchoring-is-required-for-efficient-%C3%AE-loop-opening-and-closing-in-cytosolic-phosphoenolpyruvate-carboxykinase
#3
Danica Cui, Aron Broom, Matthew J Mcleod, Elizabeth M Meiering, Todd Holyoak
Mobile Ω-loops play essential roles in the function of many enzymes. Here we investigated the importance of a residue lying outside of the mobile Ω-loop element in the catalytic function of an H477R variant of cPEPCK using crystallographic, kinetic, and computational analysis. The crystallographic data suggest that efficient transitioning of the Ω-loop to the closed conformation requires stabilization of the N-terminus of the loop through contacts between R461 and E588. In contrast, the C-terminal end of the Ω-loop undergoes changing interactions with the enzyme body through contacts between H477 at the C-terminus of the loop and E591 located on the enzyme body...
March 27, 2017: Biochemistry
https://www.readbyqxmd.com/read/28342437/-the-dignity-of-the-vulnerable-is-priceless-what-you-can-do-biolaw-to-save-us-from-the-economistic-trap
#4
Claudio Sartea
This article proposes a reflection on the exclusion of particularly vulnerable human beings as a condition for the success of economistic culture and social organization. This fragility can depend on the body side as well as the social aspect: the effects of discrimination are identical. To react to a situation of injustice less and less tolerable, the biolaw touches -as in general the right, if it has a meaning and a specific function, and is not reduced to mere legitimization of the balance of forces or interest of the individuals or the groups better organized and represented- defend the fragility of all violence in the name of equality among human beings which depend on the universal condition of vulnerability, held in its positive aspects by philosophers such as MacIntyre and Nussbaum and many literary geniuses of all times...
January 2017: Cuadernos de Bioética: Revista Oficial de la Asociación Española de Bioética y Ética Médica
https://www.readbyqxmd.com/read/28342274/a-feasibility-study-for-enrichment-of-highly-aggressive-cancer-subpopulations-by-their-biophysical-properties-via-dielectrophoresis-enhanced-with-synergistic-fluid-flow
#5
Temple Anne Douglas, Jaka Cemazar, Nikita Balani, Daniel C Sweeney, Eva M Schmelz, Rafael V Davalos
A common problem with cancer treatment is the development of treatment resistance and tumor recurrence that result from treatments that kill most tumor cells yet leave behind aggressive cells to repopulate. Presented here is a microfluidic device that can be used to isolate tumor subpopulations to optimize treatment selection. Dielectrophoresis (DEP) is a phenomenon where particles are polarized by an electric field and move along the electric field gradient. Different cell subpopulations have different DEP responses depending on their bioelectrical phenotype, which, we hypothesize, correlate with aggressiveness...
March 25, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28340947/ultrasonic-assisted-formation-and-stability-of-mustard-oil-in-water-nanoemulsion-effect-of-process-parameters-and-their-optimization
#6
Jitendra Carpenter, Virendra Kumar Saharan
The present work reports the ultrasound assisted preparation of mustard oil in water nanoemulsion stabilized by Span 80 and Tween 80 at different operating conditions. Effects of various operating parameters such as HLB (Hydrophilic Lipophilic Balance) value, surfactant volume fraction (φS), oil volume fraction (φO) and power amplitude were investigated and optimized on the basis of droplet size and stability of nanoemulsions. It was observed that minimum droplet size of about 87.38nm was obtained within 30min of ultrasonication at an optimum HLB value of 10, φS of 0...
March 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28340588/comparison-of-the-com-fcp-inclination-angle-and-other-mediolateral-stability-indicators-for-turning
#7
Rui Xu, Xin Wang, Jiajia Yang, Feng He, Xin Zhao, Hongzhi Qi, Peng Zhou, Dong Ming
BACKGROUND: Studies have shown that turning is associated with more instability than straight walking and instability increases with turning angles. However, the precise relationship of changes in stability with the curvature and step length of turning is not clear. The traditional center of mass (COM)-center of pressure (COP) inclination angle requires the use of force plates. A COM-foot contact point (FCP) inclination angle derived from kinematic data is proposed in this study as a measure of the stability of turning...
March 24, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28337941/lesion-symptom-map-of-cognitive-postural-interference-in-multiple-sclerosis
#8
Serena Ruggieri, Fulvia Fanelli, Letizia Castelli, Nikolaos Petsas, Laura De Giglio, Luca Prosperini
OBJECTIVE: To investigate the disease-altered structure-function relationship underlying the cognitive-postural interference (CPI) phenomenon in multiple sclerosis (MS). METHODS: We measured postural sway of 96 patients and 48 sex-/age-matched healthy controls by force platform in quiet standing (single-task (ST)) while performing the Stroop test (dual-task (DT)) to estimate the dual-task cost (DTC) of balance. In patient group, binary T2 and T1 lesion masks and their corresponding lesion volumes were obtained from magnetic resonance imaging (MRI) of brain...
March 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28336804/beyond-privacy-and-exposure-ethical-issues-within-citizen-facing-analytics
#9
Peter Grindrod
We discuss the governing forces for analytics, especially concerning citizens' behaviours and their transactions, that depend on which of three spheres of operation an institution is in (corporate, public sector/government and academic). We argue that aspirations and missions also differ by sphere even as digital spaces have drawn these spheres ever closer together. We propose that citizens' expectations and implicit permissions for any exploitation of their data require the perception of a fair balance of benefits, which should be transparent (accessible to citizens) and justifiable...
December 28, 2016: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/28335461/design-and-validation-of-a-low-cost-portable-device-to-quantify-postural-stability
#10
Yong Zhu
Measurement of the displacement of the center-of-pressure (COP) is an important tool used in biomechanics to assess postural stability and human balance. The goal of this research was to design and validate a low-cost portable device that can offer a quick indication of the state of postural stability and human balance related conditions. Approximate entropy (ApEn) values reflecting the amount of irregularity hiding in COP oscillations were used to calculate the index. The prototype adopted a portable design using the measurements of the load cells located at the four corners of a low-cost force platform...
March 18, 2017: Sensors
https://www.readbyqxmd.com/read/28333619/the-effect-of-vibrotactile-cuing-on-recovery-strategies-from-a-treadmill-induced-trip
#11
Beom-Chan Lee, Bernard J Martin, Timothy A Thrasher, Charles S Layne
Effective fall prevention technologies need to detect and transmit the key information that will alert an individual in advance about a potential fall. This study investigated advanced vibrotactile cuing that may facilitate trip recovery for balance-impaired individuals who are prone to falling. A split-belt treadmill that simulated unpredictable trip perturbations was developed to compare balance recovery without and with cuing. Kinetic and kinematic measures from force plates and full body motion capture system were used to characterize the recovery responses...
March 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28332667/arrested-coalescence-of-viscoelastic-droplets-triplet-shape-and-restructuring
#12
Prerna Dahiya, Andrew DeBenedictis, Timothy J Atherton, Marco Caggioni, Stuart W Prescott, Richard W Hartel, Patrick T Spicer
The stability of shapes formed by three viscoelastic droplets during their arrested coalescence has been investigated using micromanipulation experiments. Addition of a third droplet to arrested droplet doublets is shown to be controlled by the balance between interfacial pressures driving coalescence and internal elasticity that resists total consolidation. The free fluid available within the droplets controls the transmission of stress during droplet combination and allows connections to occur via formation of a neck between the droplets...
March 23, 2017: Soft Matter
https://www.readbyqxmd.com/read/28332396/salinity-dependent-contact-angle-alteration-in-oil-brine-silicate-systems-the-critical-role-of-divalent-cations
#13
Martin E J Haagh, Igor Siretanu, Michael H G Duits, Frieder Mugele
The effectiveness of water flooding oil recovery depends to an important extent on the competitive wetting of oil and water on the solid rock matrix. Here, we use macroscopic contact angle goniometry in highly idealized model systems to evaluate how brine salinity affects the balance of wetting forces and to infer the microscopic origin of the resulting contact angle alteration. We focus in particular on two competing mechanisms debated in the literature, namely double layer expansion and divalent cation bridging...
March 23, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28332210/an-update-on-the-regulation-of-photosynthesis-by-thylakoid-ion-channels-and-transporters-in-arabidopsis
#14
Cornelia Spetea, Andrei Herdean, Guillaume Allorent, Luca Carraretto, Giovanni Finazzi, Ildikò Szabo
In natural variable environments, plants rapidly adjust photosynthesis for optimal balance between light absorption and utilization. There is increasing evidence suggesting that ion fluxes across the chloroplast thylakoid membrane play an important role in this regulation, by affecting the proton motive force, and consequently photosynthesis and thylakoid membrane ultrastructure. This minireview presents an update on the thylakoid ion channels and transporters characterized in Arabidopsis thaliana as being involved in these processes, as well as an outlook at the evolutionary conservation of their functions in other photosynthetic organisms...
March 23, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/28331907/brace-technology-thematic-series-the-3d-rigo-ch%C3%A3%C2%AAneau-type-brace
#15
Manuel Rigo, Mina Jelačić
BACKGROUND: Chêneau and Matthias introduced in 1979 a brace concept inspired in casting. The brace was initially named "CTM" from Chêneau-Toulouse-Münster. The name "CTM" is still popular in France but "Chêneau-type brace" is its common name in the rest of the world. Principles to construct this brace were originally based on anatomical descriptions rather than biomechanics, and its standard is poor. METHODS: This paper follows the format of the "Brace technology thematic series...
2017: Scoliosis and Spinal Disorders
https://www.readbyqxmd.com/read/28331189/noise-driven-return-statistics-scaling-and-truncation-in-stochastic-storage-processes
#16
Tomás Aquino, Antoine Aubeneau, Gavan McGrath, Diogo Bolster, Suresh Rao
In countless systems, subjected to variable forcing, a key question arises: how much time will a state variable spend away from a given threshold? When forcing is treated as a stochastic process, this can be addressed with first return time distributions. While many studies suggest exponential, double exponential or power laws as empirical forms, we contend that truncated power laws are natural candidates. To this end, we consider a minimal stochastic mass balance model and identify a parsimonious mechanism for the emergence of truncated power law return times...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28326772/illuminating-the-reaction-pathways-of-viromimetic-assembly
#17
Hande E Cingil, Emre B Boz, Giovanni Biondaro, Renko de Vries, Martien A Cohen Stuart, Daniela J Kraft, Paul van der Schoot, Joris Sprakel
The co-assembly of well-defined biological nanostructures relies on a delicate balance between attractive and repulsive interactions between biomolecular building blocks. Viral capsids are a prototypical example, where coat proteins exhibit not only self-interactions but also interact with the cargo they encapsulate. In Nature the balance between antagonistic and synergistic interactions is evolved to avoid kinetic trapping and polymorphism. To date it has remained a major challenge to experimentally disentangle the complex kinetic reaction pathways that underlie successful co-assembly of biomolecular building blocks in a non-invasive approach with high temporal resolution...
March 22, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28326440/effects-of-visual-motion-consistent-or-inconsistent-with-gravity-on-postural-sway
#18
Priscilla Balestrucci, Elena Daprati, Francesco Lacquaniti, Vincenzo Maffei
Vision plays an important role in postural control, and visual perception of the gravity-defined vertical helps maintaining upright stance. In addition, the influence of the gravity field on objects' motion is known to provide a reference for motor and non-motor behavior. However, the role of dynamic visual cues related to gravity in the control of postural balance has been little investigated. In order to understand whether visual cues about gravitational acceleration are relevant for postural control, we assessed the relation between postural sway and visual motion congruent or incongruent with gravity acceleration...
March 22, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28326231/in-situ-monitoring-by-raman-spectroscopy-of-the-thermal-doping-of-graphene-and-mos2-in-o2-controlled-atmosphere
#19
Aurora Piazza, Filippo Giannazzo, Gianpiero Buscarino, Gabriele Fisichella, Antonino La Magna, Fabrizio Roccaforte, Marco Cannas, Franco Mario Gelardi, Simonpietro Agnello
The effects of temperature and atmosphere (air and O2) on the doping of monolayers of graphene (Gr) on SiO2 and Si substrates, and on the doping of MoS2 multilayer flakes transferred on the same substrates have been investigated. The investigations were carried out by in situ micro-Raman spectroscopy during thermal treatments up to 430 °C, and by atomic force microscopy (AFM). The spectral positions of the G and 2D Raman bands of Gr undergo only minor changes during treatment, while their amplitude and full width at half maximum (FWHM) vary as a function of the temperature and the used atmosphere...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28325024/balance-quality-assessment-as-an-early-indicator-of-physical-frailty-in-older-people
#20
Aly Chkeir, Doha Safieddine, D Bera, M Collart, J L Novella, M Drame, David J Hewson, Jacques Duchene
Frailty is an increasingly common geriatric condition that results in an increased risk of adverse health outcomes such as falls. The most widely-used means of detecting frailty is the Fried phenotype, which includes several objective measures such as grip strength and gait velocity. One method of screening for falls is to measure balance, which can be done by a range of techniques including the assessment of the Centre of Pressure (CoP) during a balance assessment. The Balance Quality Tester (BQT) is a device based on a commercial bathroom scale that can evaluate balance quality...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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