keyword
MENU ▼
Read by QxMD icon Read
search

Shear

keyword
https://www.readbyqxmd.com/read/28927008/can-more-nanoparticles-induce-larger-viscosities-of-nanoparticle-enhanced-wormlike-micellar-system-newms
#1
Mingwei Zhao, Yue Zhang, Chenwei Zou, Caili Dai, Mingwei Gao, Yuyang Li, Wenjiao Lv, Jianfeng Jiang, Yining Wu
There have been many reports about the thickening ability of nanoparticles on the wormlike micelles in the recent years. Through the addition of nanoparticles, the viscosity of wormlike micelles can be increased. There still exists a doubt: can viscosity be increased further by adding more nanoparticles? To answer this issue, in this work, the effects of silica nanoparticles and temperature on the nanoparticles-enhanced wormlike micellar system (NEWMS) were studied. The typical wormlike micelles (wormlike micelles) are prepared by 50 mM cetyltrimethyl ammonium bromide (CTAB) and 60 mM sodium salicylate (NaSal)...
September 18, 2017: Materials
https://www.readbyqxmd.com/read/28925962/strengthening-of-existing-bridge-structures-for-shear-and-bending-with-carbon-textile-reinforced-mortar
#2
Martin Herbrand, Viviane Adam, Martin Classen, Dominik Kueres, Josef Hegger
Increasing traffic loads and changes in code provisions lead to deficits in shear and flexural capacity of many existing highway bridges. Therefore, a large number of structures are expected to require refurbishment and strengthening in the future. This projection is based on the current condition of many older road bridges. Different strengthening methods for bridges exist to extend their service life, all having specific advantages and disadvantages. By applying a thin layer of carbon textile-reinforced mortar (CTRM) to bridge deck slabs and the webs of pre-stressed concrete bridges, the fatigue and ultimate strength of these members can be increased significantly...
September 19, 2017: Materials
https://www.readbyqxmd.com/read/28925690/fiber-alignment-and-liquid-crystal-orientation-of-cellulose-nanocrystals-in-the-electrospun-nanofibrous-mats
#3
Weiguang Song, Dagang Liu, Nana Prempeh, Renjie Song
Sulfate cellulose nanocrystal (CNC) dispersions always present specific self-assembled cholesteric mesophases which is easily affected by the inherent properties of particle size, surface charge and repulsion or affinity interaction, and external field force generated from ionic potential of added electrolytes, magnetic, electric, and/or mechanical shearing or stretching. Aiming at understanding the liquid crystal orientation and fiber alignment under high-voltage electric field, randomly distributed, uniform-aligned, or core-sheath nanofibrous mats involving PVA and charged CNCs were electrospun; and amongst them, specific straight arrayed fine nanofibers wi...
September 19, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28925467/effects-of-rosuvastatin-on-pentraxin-3-level-and-platelet-aggregation-rate-in-elderly-patients-with-acute-myocardial-infarction-undergoing-elective-interventional-therapy-a-double-blind-controlled-study
#4
Y-H Li, L-H Wang, Q Li, D-W Yu, Y-S Gai, S-X Cai, F Tian, H-Y Zhou
OBJECTIVE: To investigate clinical effects of rosuvastatin on blood lipid levels, hemorheological profiles, vascular endothelial function, pentraxin 3 (PTX-3) level, the number of granule membrane glycoprotein (GMP-140) molecules and platelet aggregation rate in elderly patients with acute myocardial infarction (AMI) undergoing elective percutaneous coronary intervention (PCI). PATIENTS AND METHODS: Total of 120 elderly patients admitted with AMI undergoing elective PCI from July 2014 to January 2016 were selected...
August 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28924611/size-effects-resolve-discrepancies-in-40-years-of-work-on-low-temperature-plasticity-in-olivine
#5
Kathryn M Kumamoto, Christopher A Thom, David Wallis, Lars N Hansen, David E J Armstrong, Jessica M Warren, David L Goldsby, Angus J Wilkinson
The strength of olivine at low temperatures and high stresses in Earth's lithospheric mantle exerts a critical control on many geodynamic processes, including lithospheric flexure and the formation of plate boundaries. Unfortunately, laboratory-derived values of the strength of olivine at lithospheric conditions are highly variable and significantly disagree with those inferred from geophysical observations. We demonstrate via nanoindentation that the strength of olivine depends on the length scale of deformation, with experiments on smaller volumes of material exhibiting larger yield stresses...
September 2017: Science Advances
https://www.readbyqxmd.com/read/28924052/role-of-the-endothelial-caveolae-microdomain-in-shear-stress-mediated-coronary-vasorelaxation
#6
Tong Lu, Xiao-Li Wang, Qiang Chai, Xiaojing Sun, Gary C Sieck, Zvonimir S Katusic, Hon-Chi Lee
In this study, we determined the role of caveolae and the ionic mechanisms that mediate shear stress-mediated vasodilation (SSD). We found that both TRPV4 and SK channels are targeted to caveolae in freshly isolated bovine coronary endothelial cells (BCECs) and that TRPV4 and KCa2.3 (SK3) channels are co-immunoprecipitated by anti-caveolin-1 antibodies. Acute exposure of BCECs seeded in a capillary tube to 10 dynes/cm2 of SS resulted in activation of TRPV4 and SK currents. However, after incubation with HC067047 (TRPV4 inhibitor) SK currents could no longer be activated by SS, suggesting SK channel activation by SS was mediated through TRPV4...
September 18, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28923973/flow-induced-gelation-of-microfiber-suspensions
#7
Antonio Perazzo, Janine K Nunes, Stefano Guido, Howard A Stone
The flow behavior of fiber suspensions has been studied extensively, especially in the limit of dilute concentrations and rigid fibers; at the other extreme, however, where the suspensions are concentrated and the fibers are highly flexible, much less is understood about the flow properties. We use a microfluidic method to produce uniform concentrated suspensions of high aspect ratio, flexible microfibers, and we demonstrate the shear thickening and gelling behavior of such microfiber suspensions, which, to the best of our knowledge, has not been reported previously...
September 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28923473/virtual-surgery-for-patients-with-nasal-obstruction-use-of-computational-fluid-dynamics-mecomland-%C3%A2-digbody-%C3%A2-noseland-%C3%A2-to-document-objective-flow-parameters-and-optimise-surgical-results
#8
Manuel A Burgos, Maria Agustina Sevilla García, Enrique Sanmiguel Rojas, Carlos Del Pino, Carlos Fernández Velez, Francisco Piqueras, Francisco Esteban Ortega
INTRODUCTION: Computational fluid dynamics (CFD) is a mathematical tool to analyse airflow. We present a novel CFD software package to improve results following nasal surgery for obstruction. METHODS: A group of engineers in collaboration with otolaryngologists have developed a very intuitive CFD software package called MeComLand®, which uses the patient's cross-sectional (tomographic) images, thus showing in detail results originated by CFD such as airflow distributions, velocity profiles, pressure, or wall shear stress...
September 15, 2017: Acta Otorrinolaringológica Española
https://www.readbyqxmd.com/read/28922441/evaluation-of-2d-shear-wave-elastography-for-characterisation-of-focal-liver-lesions
#9
Ludmila Gerber, Daniel Fitting, Kajana Srikantharajah, Nina Weiler, Georgia Kyriakidou, Joerg Bojunga, Falko Schulze, Dimitra Bon, Stefan Zeuzem, Mireen Friedrich-Rust
BACKGROUND AND AIM: This is a prospective study for evaluation of 2D-shear wave elastography (2D-SWE) for characterisation and differentiation of benign und malignant focal liver lesions (FLLs). METHODS: The patients referred to our ultrasound unit were prospectively included. B-mode ultrasound and 2D-SWE (Aixplorer® France) were performed for one FLL in each patient. Liver histology and/or contrast-enhanced imaging were used as a reference method. RESULTS: 140 patients with FLL were included...
September 2017: Journal of Gastrointestinal and Liver Diseases: JGLD
https://www.readbyqxmd.com/read/28922142/reduced-amputation-rate-with-isovolemic-hemodilution-in-critical-limb-ischemia-patients
#10
Doosang Kim, Daniel J Cho, Young I Cho
AIMS: Critical limb ischemia (CLI) patients are characterized by intractable pain in spite of medication, non-healing ulcers, and gangrene. The objective of this study was to investigate whether or not isovolemic hemodilution treatment can reduce the rate of major amputations in CLI. METHODS: 28 patients were studied who had tissue loss on Rutherford Grade III, Category 5 or 6. The subjects were divided into two arms: standard-of-care, conventional therapy (CT) (n = 15) as a control group and hemodilution therapy (HT) (n = 13) as a study group...
September 11, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28921897/a-combined-experimental-and-theoretical-approaches-to-correlate-the-structure-and-properties-of-n-methylpyrrolidone-based-protic-ionic-liquids
#11
Somenath Panda, Kaushik Kundu, Siva Umapathy, Ramesh Gardas
Correlation of the structure and properties of ionic liquids (ILs) is essential for the development of optimized materials in the fields of gas capture and separation, battery electrolyte, and cellulose dissolution process. In view of this, a detailed vibrational spectroscopic analysis and quantum-chemical calculation were performed to explore the interionic interactions in N-methylpyrrolidone cation and carboxylate anion-based ILs. FTIR and Raman spectroscopy were applied to identify the H-bonding interactions between ion-pair, in which red-shifted vibrational modes were evidenced as a function of anion chain length...
September 17, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28920545/median-nerve-movement-in-the-carpal-tunnel-before-and-after-carpal-tunnel-release-using-transverse-ultrasound
#12
Mitsuhiko Nanno, Norie Kodera, Yuji Tomori, Yusuke Hagiwara, Shinro Takai
PURPOSE: We aimed to compare the movement of the median nerve within the carpal tunnel during wrist and finger motions between before and after carpal tunnel release (CTR) using transverse ultrasound in carpal tunnel syndrome (CTS) patients and to evaluate the biomechanical efficacy of CTR for CTS. METHODS: Twenty-four patients with CTS were examined by transverse ultrasound. The location of the median nerve within the carpal tunnel was examined quantitatively as a coordinate at varied wrist positions with finger extension and flexion, respectively, before and after CTR...
September 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28920187/sub-ablative-er-cr-ysgg-laser-irradiation-under-all-ceramic-restorations-effects-on-demineralization-and-shear-bond-strength
#13
Serdar Bağlar
This study evaluated the caries resistant effects of sub-ablative Er,Cr:YSGG laser irradiation alone and combined with fluoride in comparison with fluoride application alone on enamel prepared for veneer restorations. And also, evaluated these treatments' effects on the shear bond strength of all-ceramic veneer restorations. One hundred and thirty-five human maxillary central teeth were assigned to groups of 1a-control, 1b-laser treated, 1c-fluoride treated, 1d-laser + fluoride treated for shear bond testing and to groups of 2a-positive control(non-demineralised), 2b-laser treated, 2c-fluoride treated, 2d-laser + fluoride treated, 2e-negative control (demineralised) for microhardness testing (n = 15, N = 135)...
September 17, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28919372/biological-applications-of-kinetics-of-wetting-and-spreading
#14
REVIEW
G Ahmed, O Arjmandi Tash, J Cook, A Trybala, V Starov
Wetting and spreading kinetics of biological fluids has gained a substantial interest recently. The importance of these fluids in our lives has driven the pace of publications. Globally scientists have ever growing interest in understanding wetting phenomena due to its vast applications in biological fluids. It is impractical to review extremely large number of publications in the field of kinetics of complex biological fluids and cosmetic solutions on diverse surfaces. Therefore, biological and cosmetic applications of wetting and spreading dynamics are considered in the following areas: (i) Spreading of Newtonian liquids in the case of non-porous and porous substrates...
August 18, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28919238/post-blink-tear-film-dynamics-in-healthy-and-dry-eyes-during-spontaneous-blinking
#15
Dorota Szczesna-Iskander
PURPOSE: The aim was to investigate the dynamics of post-blink tear film leveling in natural blinking conditions (NBC) for healthy subjects and those diagnosed with dry eye syndrome (DES) and to relate this phase to the tear film surface quality (TFSQ) before the following blink. METHODS: The study included 19 healthy persons and 10 with dry eye, grouped according to symptoms and signs observed during examination. Lateral shearing interferometry was used to examine TFSQ...
September 14, 2017: Ocular Surface
https://www.readbyqxmd.com/read/28919161/magnetic-resonance-elastography-of-the-brain-a-comparison-between-pigs-and-humans
#16
Johannes Weickenmeier, Mehmet Kurt, Efe Ozkaya, Max Wintermark, Kim Butts Pauly, Ellen Kuhl
Magnetic resonance elastography holds promise as a non-invasive, easy-to-use, in vivo biomarker for neurodegenerative diseases. Throughout the past decade, pigs have gained increased popularity as large animal models for human neurodegeneration. However, the volume of a pig brain is an order of magnitude smaller than the human brain, its skull is 40% thicker, and its head is about twice as big. This raises the question to which extent established vibration devices, actuation frequencies, and analysis tools for humans translate to large animal studies in pigs...
August 26, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28918876/evaluation-of-potential-substrates-for-restenosis-and-thrombosis-in-overlapped-versus-edge-to-edge-juxtaposed-bioabsorbable-scaffolds-insights-from-a-computed-fluid-dynamic-study
#17
Gianluca Rigatelli, Marco Zuin, Fabio Dell'Avvocata, Paolo Cardaioli, Dobrin Vassiliev, Miroslaw Ferenc, Nguyen Tuan Nghia, Thach Nguyen, Nicholas Foin
BACKGROUND/PURPOSE: Multiple BRSs and specifically the Absorb scaffold (BVS) (Abbott Vascular, Santa Clara, CA USA) have been often used to treat long diffuse coronary artery lesions. We evaluate by a computational fluid dynamic(CFD) study the impact on the intravascular fluid rheology on multiple bioabsorbable scaffolds (BRS) by standard overlapping versus edge-to-edge technique. METHODS/MATERIALS: We simulated the treatment of a real long significant coronary lesion (>70% luminal narrowing) involving the left anterior descending artery (LAD) treated with a standard or edge-to-edge technique, respectively...
August 17, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/28917989/shear-strength-of-pharmaceutical-tablets-theoretical-considerations-evaluation-and-relation-with-the-capping-tendency-of-biconvex-tablets
#18
V Mazel, H Diarra, V Busignies, P Tchoreloff
Capping is a major industrial issue during pharmaceutical powder compression, especially in the case of biconvex tablets. Several articles proposed that capping was in fact a failure in shear. Shear strength should thus be interesting to study the capping tendency of a formulation. In this work, the ratio between the shear strength and the tensile strength obtained by diametral compression was first studied from a theoretical point of view considering different failure criteria. Then, a shear test usually performed on bilayer tablets was adapted to monolayer tablets...
September 13, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28917988/a-comprehensive-screening-platform-for-aerosolizable-protein-formulations-for-intranasal-and-pulmonary-drug-delivery
#19
Martina Röhm, Stefan Carle, Frank Maigler, Johannes Flamm, Viktoria Kramer, Chrystelle Mavoungou, Otmar Schmid, Katharina Schindowski
Aerosolized administration of biopharmaceuticals to the airways is a promising route for nasal and pulmonary drug delivery, but - in contrast to small molecules - little is known about the effects of aerosolization on safety and efficacy of biopharmaceuticals. Proteins are sensitive against aerosolization-associated shear stress. Tailored formulations can shield proteins and enhance permeation, but formulation development requires extensive screening approaches. Thus, the aim of this study was to develop a cell-based in vitro technology platform that includes screening of protein quality after aerosolization and transepithelial permeation...
September 13, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28917866/rapidly-growing-vegetables-as-new-sources-for-lignocellulose-nanofibre-isolation-physicochemical-thermal-and-rheological-characterisation
#20
Eduardo Espinosa, Rafael Sánchez, Zoilo González, Juan Domínguez-Robles, Begoña Ferrari, Alejandro Rodríguez
Rapidly growing vegetables could be an abundant and cheap sources of lignocellulose biomass for lignocellulose nanofibre (LCNF) production. The aim of this work is to study the feasibility of using Chamaecytisus proliferus and Leucaena leucocephala for LCNF isolation by mechanical, enzymatic and TEMPO-mediated oxidation pre-treatments. Characterisation of the nanofibres shows that there are significant differences in the production of LCNF depending on the raw material and pre-treatment used. XRD and FTIR analysis show that homogenisation has a strong negative effect on the crystallinity index; however, the higher lignin content of tagasaste (10%) protects the fibre, causing a smaller decrease in crystallinity...
November 1, 2017: Carbohydrate Polymers
keyword
keyword
21916
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"