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https://www.readbyqxmd.com/read/28982172/numerical-investigation-of-the-vortex-induced-vibration-of-an-elastically-mounted-circular-cylinder-at-high-reynolds-number-re-104-and-low-mass-ratio-using-the-rans-code
#1
Niaz Bahadur Khan, Zainah Ibrahim, Linh Tuan The Nguyen, Muhammad Faisal Javed, Mohammed Jameel
This study numerically investigates the vortex-induced vibration (VIV) of an elastically mounted rigid cylinder by using Reynolds-averaged Navier-Stokes (RANS) equations with computational fluid dynamic (CFD) tools. CFD analysis is performed for a fixed-cylinder case with Reynolds number (Re) = 104 and for a cylinder that is free to oscillate in the transverse direction and possesses a low mass-damping ratio and Re = 104. Previously, similar studies have been performed with 3-dimensional and comparatively expensive turbulent models...
2017: PloS One
https://www.readbyqxmd.com/read/28972568/cfd-modeling-of-chamber-filling-in-a-micro-biosensor-for-protein-detection
#2
Meiirbek Islamov, Marzhan Sypabekova, Damira Kanayeva, Luis Rojas-Solórzano
Tuberculosis (TB) remains one of the main causes of human death around the globe. The mortality rate for patients infected with active TB goes beyond 50% when not diagnosed. Rapid and accurate diagnostics coupled with further prompt treatment of the disease is the cornerstone for controlling TB outbreaks. To reduce this burden, the existing gap between detection and treatment must be addressed, and dedicated diagnostic tools such as biosensors should be developed. A biosensor is a sensing micro-device that consists of a biological sensing element and a transducer part to produce signals in proportion to quantitative information about the binding event...
October 3, 2017: Biosensors
https://www.readbyqxmd.com/read/28969313/randomized-trial-of-near-infrared-spectroscopy-for-personalized-optimization-of-cerebral-tissue-oxygenation-during-cardiac-surgery
#3
C A Rogers, S Stoica, L Ellis, E A Stokes, S Wordsworth, L Dabner, G Clayton, R Downes, E Nicholson, S Bennett, G D Angelini, B C Reeves, G J Murphy
Background: We assessed whether a near-infrared spectroscopy (NIRS)-based algorithm for the personalized optimization of cerebral oxygenation during cardiopulmonary bypass combined with a restrictive red cell transfusion threshold would reduce perioperative injury to the brain, heart, and kidneys. Methods: In a randomized controlled trial, participants in three UK centres were randomized with concealed allocation to a NIRS (INVOS 5100; Medtronic Inc., Minneapolis, MN, USA)-based 'patient-specific' algorithm that included a restrictive red cell transfusion threshold (haematocrit 18%) or to a 'generic' non-NIRS-based algorithm (standard care)...
September 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28949974/aerobic-exercise-for-vasomotor-menopausal-symptoms-a-cost-utility-analysis-based-on-the-active-women-trial
#4
Ilias Goranitis, Leana Bellanca, Amanda J Daley, Adele Thomas, Helen Stokes-Lampard, Andrea K Roalfe, Sue Jowett
OBJECTIVE: To compare the cost-utility of two exercise interventions relative to a control group for vasomotor menopausal symptoms. DESIGN: Economic evaluation taking a UK National Health Service and Personal Social Services perspective and a societal perspective. SETTING: Primary care. POPULATION: Peri- and postmenopausal women who have not used hormone therapy in the past 3 months and experience ≥ 5 episodes of vasomotor symptoms daily...
2017: PloS One
https://www.readbyqxmd.com/read/28893392/computational-modeling-and-validation-of-human-nasal-airflow-under-various-breathing-conditions
#5
Chengyu Li, Jianbo Jiang, Haibo Dong, Kai Zhao
The human nose serves vital physiological functions, including warming, filtration, humidification, and olfaction. These functions are based on transport phenomena that depend on nasal airflow patterns and turbulence. Accurate prediction of these airflow properties requires careful selection of computational fluid dynamics models and rigorous validation. The validation studies in the past have been limited by poor representations of the complex nasal geometry, lack of detailed airflow comparisons, and restricted ranges of flow rate...
September 5, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28879656/variability-in-responses-observed-in-human-white-adipose-tissue-models
#6
Rosalyn D Abbott, Francis E Borowsky, Carlo A Alonzo, Adam Zieba, Irene Georgakoudi, David L Kaplan
Obesity is a risk factor for a myriad of diseases including diabetes, cardiovascular dysfunction, cirrhosis and cancer and there is a need for new systems to study how excess adipose tissue relates to the onset of disease processes. This study provides proof of concept patient-specific tissue models of human white adipose tissue to accommodate the variability in human samples. Our 3D tissue engineering approach established lipolytic responses and changes in insulin-stimulated glucose uptake from small volumes of human lipoaspirate, making this methodology useful for patient specific sample source assessments of treatment strategies, drug responses, disease mechanisms and other responses that vary between patients...
September 6, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28857559/rational-design-of-in-vivo-tau-tangle-selective-near-infrared-fluorophores-expanding-the-bodipy-universe
#7
Peter Verwilst, Hye-Ri Kim, Jinho Seo, Nak-Won Sohn, Seung-Yun Cha, Yeongmin Kim, Sungho Maeng, Jung-Won Shin, Jong Hwan Kwak, Chulhun Kang, Jong Seung Kim
The elucidation of the cause of Alzheimer's disease remains one of the greatest questions in neurodegenerative research. The lack of highly reliable low-cost sensors to study the structural changes in key proteins during the progression of the disease is a contributing factor to this lack of insight. In the current work, we describe the rational design and synthesis of two fluorescent BODIPY-based probes, named Tau 1 and Tau 2. The probes were evaluated on the molecular surface formed by a fibril of the PHF6 ((306)VQIVYK(311)) tau fragment using molecular docking studies to provide a potential molecular model to rationalize the selectivity of the new probes as compared to a homologous Aβ-selective probe...
September 15, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28816476/benefits-of-flexible-prioritization-in-working-memory-can-arise-without-costs
#8
Nicholas E Myers, Sammi R Chekroud, Mark G Stokes, Anna C Nobre
Most recent models conceptualize working memory (WM) as a continuous resource, divided up according to task demands. When an increasing number of items need to be remembered, each item receives a smaller chunk of the memory resource. These models predict that the allocation of attention to high-priority WM items during the retention interval should be a zero-sum game: improvements in remembering cued items come at the expense of uncued items because resources are dynamically transferred from uncued to cued representations...
August 17, 2017: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/28738606/a-label-free-fluorometric-assay-for-actin-detection-based-on-enzyme-responsive-dna-templated-copper-nanoparticles
#9
Quanwei Song, Lixia Yang, Hongkun Chen, Rong Zhang, Na Na, Jin Ouyang
Herein, we develop a fluorescent strategy for label-free detection of actin by the in situ formation of double-stranded DNA (dsDNA) templated copper nanoparticles (CuNPs) and the digestion capability of deoxyribonuclease I (DNase I). In this design, the introduction of actin can effectively hinder the enzymic digestion owing to the exceptional target-mediated conformational structure between actin and DNase I. Consequently, the remaining adenine-thymine-rich dsDNA can act as an efficient template for fluorescent CuNPs (λex = 340nm, λem = 585nm) with a Mega-Stokes shifting (245nm)...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28660673/patient-reported-outcome-measures-in-advanced-musculoskeletal-physiotherapy-practice-a-systematic-review
#10
Orna Fennelly, Catherine Blake, François Desmeules, Diarmuid Stokes, Caitriona Cunningham
OBJECTIVE: Advanced practice physiotherapists (APPs), also known as extended scope physiotherapists, provide a new model of service delivery for musculoskeletal (MSK) disorders. Research to date has largely focused on health service efficiencies, with less emphasis on patient outcomes. The present systematic review aimed to identify the patient-reported outcome measures (PROMs) being utilized by APPs. METHOD: A wide search strategy was employed, including the PubMed, Embase, CINAHL, CENTRAL and PEDro databases, to identify studies relating to PROMs utilized by APPs in MSK healthcare settings...
June 29, 2017: Musculoskeletal Care
https://www.readbyqxmd.com/read/28654814/an-overview-of-the-outcomes-and-impact-of-specialist-and-advanced-nursing-and-midwifery-practice-on-quality-of-care-cost-and-access-to-services-a-narrative-review
#11
REVIEW
Mary Casey, Laserina O'Connor, Andrew Cashin, Rita Smith, Denise O'Brien, Emma Nicholson, Denise O'Leary, Gerard Fealy, Martin McNamara, Mary Ellen Glasgow, Diarmuid Stokes, Claire Egan
OBJECTIVES: This paper presents the results of a systematic rapid review and narrative synthesis of the literature of the outcomes and impact of specialist and advanced nursing and midwifery practice regarding quality of care, cost and access to services. DESIGN: A rapid review was undertaken of the relevant national and international literature, regulatory and policy documents relating to the establishment and definition of nurses' and midwives' specialist and advanced practice roles...
September 2017: Nurse Education Today
https://www.readbyqxmd.com/read/28628594/telehealth-wearable-sensors-and-the-internet-will-they-improve-stroke-outcomes-through-increased-intensity-of-therapy-motivation-and-adherence-to-rehabilitation-programs
#12
Jane H Burridge, Alan Chong W Lee, Ruth Turk, Maria Stokes, Jill Whitall, Ravi Vaidyanathan, Phil Clatworthy, Ann-Marie Hughes, Claire Meagher, Enrico Franco, Lucy Yardley
BACKGROUND AND PURPOSE: Stroke, predominantly a condition of older age, is a major cause of acquired disability in the global population and puts an increasing burden on health care resources. Clear evidence for the importance of intensity of therapy in optimizing functional outcomes is found in animal models, supported by neuroimaging and behavioral research, and strengthened by recent meta-analyses from multiple clinical trials. However, providing intensive therapy using conventional treatment paradigms is expensive and sometimes not feasible because of social and environmental factors...
July 2017: Journal of Neurologic Physical Therapy: JNPT
https://www.readbyqxmd.com/read/28555059/applications-of-fluorogens-with-rotor-structures-in-solar-cells
#13
REVIEW
Kok-Haw Ong, Bin Liu
Solar cells are devices that convert light energy into electricity. To drive greater adoption of solar cell technologies, higher cell efficiencies and reductions in manufacturing cost are necessary. Fluorogens containing rotor structures may be helpful in addressing some of these challenges due to their unique twisted structures and photophysics. In this review, we discuss the applications of rotor-containing molecules as dyes for luminescent down-shifting layers and luminescent solar concentrators, where their aggregation-induced emission properties and large Stokes shifts are highly desirable...
May 29, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28514521/combining-frozen-density-embedding-with-the-conductor-like-screening-model-using-lagrangian-techniques-for-response-properties
#14
Nils Schieschke, Roberto Di Remigio, Luca Frediani, Johannes Heuser, Sebastian Höfener
We present the explicit derivation of an approach to the multiscale description of molecules in complex environments that combines frozen-density embedding (FDE) with continuum solvation models, in particular the conductor-like screening model (COSMO). FDE provides an explicit atomistic description of molecule-environment interactions at reduced computational cost, while the outer continuum layer accounts for the effect of long-range isotropic electrostatic interactions. Our treatment is based on a variational Lagrangian framework, enabling rigorous derivations of ground- and excited-state response properties...
July 15, 2017: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/28414340/comparison-of-chirped-probe-pulse-and-hybrid-femtosecond-picosecond-coherent-anti-stokes-raman-scattering-for-combustion-thermometry
#15
Daniel R Richardson, Hans U Stauffer, Sukesh Roy, James R Gord
A comparison is made between two ultrashort-pulse coherent anti-Stokes Raman scattering (CARS) thermometry techniques-hybrid femtosecond/picosecond (fs/ps) CARS and chirped-probe-pulse (CPP) fs-CARS-that have become standards for high-repetition-rate thermometry in the combustion diagnostics community. These two variants of fs-CARS differ only in the characteristics of the ps-duration probe pulse; in hybrid fs/ps CARS a spectrally narrow, time-asymmetric probe pulse is used, whereas a highly chirped, spectrally broad probe pulse is used in CPP fs-CARS...
April 10, 2017: Applied Optics
https://www.readbyqxmd.com/read/28411822/label-free-and-sensitive-assay-for-deoxyribonuclease-i-activity-based-on-enzymatically-polymerized-superlong-poly-thymine-hosted-fluorescent-copper-nanoparticles
#16
Lan Luo, Fengzhou Xu, Hui Shi, Xiaoxiao He, Taiping Qing, Yanli Lei, Jinlu Tang, Dinggeng He, Kemin Wang
Deoxyribonuclease I (DNase I) is an important physiological indicator and diagnostic biomarker, but traditional methods for assessing its activity are time-consuming, laborious, and usually radioactive. Herein, by effectively combining the special functions of DNase I and terminal deoxynucleotidyl transferase (TdT), a simple, green, cost-effective, label-free and ultrasensitive assay for DNase I activity has been constructed based on superlong poly(thymine)-hosted copper nanoparticles (poly T-CuNPs). In this strategy, a 3'-phosphorylated DNA primer is designed to block TdT polymerization...
July 1, 2017: Talanta
https://www.readbyqxmd.com/read/28386158/valorisation-to-biogas-of-macroalgal-waste-streams-a-circular-approach-to-bioproducts-and-bioenergy-in-ireland
#17
Silvia Tedesco, Joseph Stokes
Seaweeds (macroalgae) have been recently attracting more and more interest as a third generation feedstock for bioenergy and biofuels. However, several barriers impede the deployment of competitive seaweed-based energy. The high cost associated to seaweed farming and harvesting, as well as their seasonal availability and biochemical composition currently make macroalgae exploitation too expensive for energy production only. Recent studies have indicated a possible solution to aforementioned challenges may lay in seaweed integrated biorefinery, in which a bioenergy and/or biofuel production step ends an extractions cascade of high-value bioproducts...
2017: Chemické Zvesti
https://www.readbyqxmd.com/read/28306169/economic-burden-of-relapsed-or-refractory-multiple-myeloma-results-from-an-international-trial
#18
Don Robinson, Robert Z Orlowski, Michael Stokes, Jianming He, Samuel Huse, Abhishek Chitnis, Britte Kranenburg, Annette Lam
OBJECTIVE: The direct cost of relapsed or refractory multiple myeloma (RRMM) is documented; indirect costs are being explored. Healthcare payers seek cost-offsets from therapies that improve clinical outcomes but challenge budgets; employers seek lower absenteeism and better productivity. Study goals were to: (i) identify direct and indirect economic factors of RRMM, and (ii) explore longitudinal relationships between clinical, economic, and health-related quality of life (HRQoL) assessments...
March 17, 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/28297968/lattice-boltzmann-simulations-of-microswimmer-tracer-interactions
#19
Joost de Graaf, Joakim Stenhammar
Hydrodynamic interactions in systems composed of self-propelled particles, such as swimming microorganisms and passive tracers, have a significant impact on the tracer dynamics compared to the equivalent "dry" sample. However, such interactions are often difficult to take into account in simulations due to their computational cost. Here, we perform a systematic investigation of swimmer-tracer interaction using an efficient force-counterforce-based lattice-Boltzmann (LB) algorithm [De Graaf et al., J. Chem...
February 2017: Physical Review. E
https://www.readbyqxmd.com/read/28270582/bacteria-getting-into-shape-genetic-determinants-of-e-%C3%A2-coli-morphology
#20
Shawn French, Jean-Philippe Côté, Jonathan M Stokes, Ray Truant, Eric D Brown
Perturbation of cellular processes is a prevailing approach to understanding biology. To better understand the complicated biology that defines bacterial shape, a sensitive, high-content platform was developed to detect multiple morphological defect phenotypes using microscopy. We examined morphological phenotypes across the Escherichia coli K-12 deletion (Keio) collection at the mid-exponential growth phase, revealing 111 deletions perturbing shape. Interestingly, 64% of these were uncharacterized mutants, illustrating the complex nature of shape maintenance and regulation in bacteria...
March 7, 2017: MBio
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