keyword
MENU ▼
Read by QxMD icon Read
search

Bearing surfaces

keyword
https://www.readbyqxmd.com/read/28230872/the-load-bearing-ability-of-a-particle-raft-under-the-transverse-compression-of-a-slender-rod
#1
Pingcheng Zuo, Jianlin Liu, Shanpeng Li
Liquid marbles and particle rafts are liquid interfaces covered with tiny particles, which are accompanied with many exotic behaviors. This study seeks to extend our understanding on the load-bearing ability of a particle raft under the transverse compression of a slender rod. At first, the interface morphologies of the particle raft and water are captured and compared with each other. Then the load-distance curves of the particle raft and water surface are measured using a self-developed device. For the particle raft, the hydrophobicity of the rod almost does not affect the interface morphology and the supporting load...
February 23, 2017: Soft Matter
https://www.readbyqxmd.com/read/28230246/functional-and-evolutionary-consequences-of-cranial-fenestration-in-birds
#2
Sander W S Gussekloo, Michael A Berthaume, Daniel R Pulaski, Irene Westbroek, Jan H Waarsing, Robin Heinen, Ian R Grosse, Elizabeth R Dumont
Ostrich-like birds (Palaeognathae) show very little taxonomic diversity while their sister taxon (Neognathae) contains roughly 10000 species. The main anatomical differences between the two taxa are in the crania. Palaeognaths lack an element in the bill called the lateral bar that is present in both ancestral theropods and modern neognaths, have thin zones in the bones of the bill, and robust bony elements on the ventral surface of their crania. Here we use a combination of modelling and developmental experiments to investigate the processes that might have led to these differences...
February 23, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28228786/hydroxyapatite-in-total-hip-arthroplasty-our-experience-with-a-plasma-spray-porous-titanium-alloy-hydroxyapatite-double-coated-cementless-stem
#3
Iacopo Castellini, Lorenzo Andreani, Paolo Domenico Parchi, Enrico Bonicoli, Nicola Piolanti, Francesca Risoli, Michele Lisanti
PURPOSE: Total hip arthroplasty could fail due to many factors and one of the most common is the aseptic loosening. In order to achieve an effective osseointegration and reduce risk of lossening, the use of cemented implant, contact porous bearing surface and organic coating were developed. Aim of this study was to evaluate clinical and radiological mid-term outcomes of a porous titanium alloy/hydroxyapatite double coating manufactured cementless femoral stem applied with "plasma spray" technique and to demonstrate the possibility to use this stem in different types of femoral canals...
September 2016: Clinical Cases in Mineral and Bone Metabolism
https://www.readbyqxmd.com/read/28227317/co-activation-periods-of-gastrocnemius-and-vastus-lateralis-during-walking-evaluated-by-surface-electromyography
#4
Alessandro Mengarelli, Annachiara Strazza, Agnese Sbrollini, Angela Agostinelli, Laura Burattini, Sandro Fioretti, Francesco Di Nardo, Alessandro Mengarelli, Annachiara Strazza, Agnese Sbrollini, Angela Agostinelli, Laura Burattini, Sandro Fioretti, Francesco Di Nardo, Alessandro Mengarelli, Sandro Fioretti, Agnese Sbrollini, Annachiara Strazza, Laura Burattini, Angela Agostinelli, Francesco Di Nardo
"In vivo" studies reported that the co-activation of gastrocnemius and quadriceps femoris (QF) muscles produces ACL strain values greater than those caused by an isolated activation of either muscle. Aim of this study was to assess the co-activation of gastrocnemius (lateral head, GL) and vastus lateralis (VL) in healthy and young adults during walking. To this purpose the Statistical Gait Analysis was performed, that allows a characterization of gait considering hundreds of strides belonging to the same walking trial...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225266/enhanced-phosphorus-locking-by-novel-lanthanum-aluminum-hydroxide-composite-implication-for-eutrophication-control
#5
Rui Xu, Meiyi Zhang, Robert J G Mortimer, Gang Pan
Lanthanum (La) bearing materials have been widely used to remove phosphorus (P) in water treatment. However, it remains a challenge to enhance phosphate (PO4) adsorption capacity and La usage efficiency. In this study, La was co-precipitated with aluminum (Al) to obtain a La/Al-hydroxide composite (LAH) for P adsorption. The maximum PO4 adsorption capacities of LAH (5.3% La) were 76.3 and 45.3 mg P g-1 at pH 4.0 and 8.5, which were 8.5 and 5.3 times higher than those of commercially available La-modified bentonite (Phoslock®, 5...
February 22, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28225256/analysis-and-control-of-chain-mobility-in-protein-hydrogels
#6
Peter B Rapp, Ahmad K Omar, Jeff J Shen, Maren E Buck, Zhen-Gang Wang, David A Tirrell
Coiled-coil domains can direct the assembly of protein block copolymers into physically crosslinked, viscoelastic hydrogels. Here we describe the use of fluorescence recovery after photobleaching (FRAP) to probe chain mobility in reversible hydrogels assembled from engineered proteins bearing terminal coiled-coil domains. We show that chain mobility can be related to the underlying dynamics of the coiled-coil domains by application of a 3-state "hopping" model of chain migration. We further show that genetic programming allows the effective mobility of network chains to be varied 500-fold through modest changes in protein sequence...
February 22, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28225251/silicone-infused-anti-smudge-nanocoatings
#7
Heng Hu, Jian Wang, Yu Wang, Emily Gee, Guojun Liu
A polyurethane-based NP-GLIDE coating that bears on its surface and in its interior nano-pools of a grafted liquid ingredient for dewetting enablement is obtained from casting and curing a film comprising a triisocyanate, a polyol (P1), and a graft (g) copolymer of P1 and poly(dimethyl siloxane) (P1-g-PDMS). A silicone-infused NP-GLIDE (SINP-GLIDE) PU coating is obtained from co-casting the NP-GLIDE precursors with a free silicone oil (SO) or SO mixture (SOs). This paper reports the preparation of the novel SINP-GLIDE coatings and discusses the effect of changing the amount and type of the infused SO as well as the coating formation conditions on their optical clarity...
February 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28223012/3d-measurements-in-conventional-x-ray-imaging-with-rgb-d-sensors
#8
Francisco Albiol, Alberto Corbi, Alberto Albiol
A method for deriving 3D internal information in conventional X-ray settings is presented. It is based on the combination of a pair of radiographs from a patient and it avoids the use of X-ray-opaque fiducials and external reference structures. To achieve this goal, we augment an ordinary X-ray device with a consumer RGB-D camera. The patient' s rotation around the craniocaudal axis is tracked relative to this camera thanks to the depth information provided and the application of a modern surface-mapping algorithm...
February 17, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28222790/the-bear-in-eurasian-plant-names-motivations-and-models
#9
REVIEW
Valeria Kolosova, Ingvar Svanberg, Raivo Kalle, Lisa Strecker, Ayşe Mine Gençler Özkan, Andrea Pieroni, Kevin Cianfaglione, Zsolt Molnár, Nora Papp, Łukasz Łuczaj, Dessislava Dimitrova, Daiva Šeškauskaitė, Jonathan Roper, Avni Hajdari, Renata Sõukand
Ethnolinguistic studies are important for understanding an ethnic group's ideas on the world, expressed in its language. Comparing corresponding aspects of such knowledge might help clarify problems of origin for certain concepts and words, e.g. whether they form common heritage, have an independent origin, are borrowings, or calques. The current study was conducted on the material in Slavonic, Baltic, Germanic, Romance, Finno-Ugrian, Turkic and Albanian languages. The bear was chosen as being a large, dangerous animal, important in traditional culture, whose name is widely reflected in folk plant names...
February 21, 2017: Journal of Ethnobiology and Ethnomedicine
https://www.readbyqxmd.com/read/28222787/an-effective-method-for-the-identification-and-separation-of-anopheles-minimus-the-primary-malaria-vector-in-thailand-and-its-sister-species-anopheles-harrisoni-with-a-comparison-of-their-mating-behaviors
#10
Kritsana Taai, Ralph E Harbach, Kittipat Aupalee, Wichai Srisuka, Thippawan Yasanga, Yasushi Otsuka, Atiporn Saeung
BACKGROUND: Species of the Anopheles minimus complex are considered to be the primary vectors of malaria in South and Southeast Asia. Two species of the complex, Anopheles minimus and Anopheles harrisoni, occur in Thailand. They are sympatric and difficult to accurately distinguish based on morphological characters. The aim of this study was to investigate the potential of antennal sensory organs to distinguish these two species. Additionally, we investigated their ability to mate in cages of different sizes, as well as the possible mechanism(s) that evokes stenogamous behavior...
February 21, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28219008/nanoroughness-strongly-impacts-lipid-mobility-in-supported-membranes
#11
Florence Sarah Blachon, Frederic F Harb, Bogdan Munteanu, Agnès Piednoir, Remy Fulcrand, Thierry Charitat, Giovanna Fragneto, Olivier Pierre-Louis, Bernard Tinland, Jean-Paul Rieu
In vivo lipid membranes interact with rough supramolecular structures such as protein clusters and fibrils. How these features whose size ranges from a few nanometers to a few tens of nanometers impact lipid and protein mobility is still investigated. Here, we study supported phospholipid bilayers, a unique biomimetic model, deposited on etched surfaces bearing nanometric corrugations. Surface roughness and mean curvature are carefully characterized by AFM imaging using ultrasharp tips. Neutron specular reflectivity supplements this surface characterization, and indicates that the bilayers follow the large scale corrugations of the substrate...
February 20, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28218373/the-use-of-polycarbonate-urethane-as-an-acetabular-shell-bearing-surface-a-5-year-prospective-study
#12
Sabine Mai, Burkhard Mai, Werner E Siebert
AIM: To evaluate the clinical performance of a polycarbonate-urethane liner as a bearing material inside a cobalt-chrome acetabular shell. METHODS: Between December 2007 and July 2011, this material combination was used in 27 total hip replacement patients, most of whom had an indication of osteoarthritis. This report focuses on the first 5-year results of the clinical use of this material combination in the TriboFit® Hip System. RESULTS: Mean Harris Hip Score showed significant improvement from 40 to 86 after 5 years, similar to studies in the literature...
February 8, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28217931/how-do-adars-bind-rna-new-protein-rna-structures-illuminate-substrate-recognition-by-the-rna-editing-adars
#13
Justin M Thomas, Peter A Beal
Deamination of adenosine in RNA to form inosine has wide ranging consequences on RNA function including amino acid substitution to give proteins not encoded in the genome. What determines which adenosines in an mRNA are subject to this modification reaction? The answer lies in an understanding of the mechanism and substrate recognition properties of adenosine deaminases that act on RNA (ADARs). Our recent publication of X-ray crystal structures of the human ADAR2 deaminase domain bound to RNA editing substrates shed considerable light on how the catalytic domains of these enzymes bind RNA and promote adenosine deamination...
February 20, 2017: BioEssays: News and Reviews in Molecular, Cellular and Developmental Biology
https://www.readbyqxmd.com/read/28217831/blood-metal-ion-concentrations-in-metal-on-metal-total-hip-arthroplasty
#14
Tadahiko Ohtsuru, Yuji Morita, Yasuaki Murata, Shuji Shimamoto, Yutaro Munakata, Yoshiharu Kato
INTRODUCTION: The hip placement with a metal-on-metal (MOM) bearing has been used for both surface replacement and total hip arthroplasty (THA). Use of MOM bearing for hip replacement reduces the wear compared to conventional bearings. METHODS: We prospectively assessed 30 patients who underwent unilateral MOM THA. A control group of 30 patients who underwent metal-on-polyethylene THA using the implants as the other group, except for bearing, were accessed. Blood samples were collected preoperatively and at 3- , 6- , 9- , 12- , 15- , 18- , and 24-month intervals...
February 20, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28214623/rheology-and-microstructure-of-aqueous-suspensions-of-nanocrystalline-cellulose-rods
#15
Yuan Xu, Aleks D Atrens, Jason R Stokes
HYPOTHESIS: Nanocrystalline cellulose (NCC) is a negatively charged rod-like colloid obtained from the hydrolysis of plant material. It is thus expected that NCC suspensions display a rich set of phase behaviour with salt and pH because of its anisotropic shape and electrical double layer that gives rise to liquid crystallinity and self-assembly respectively. It should thus be possible to tune the rheological properties of NCC suspensions for a wide variety of end-use applications. EXPERIMENTS: Rheology and structural analysis techniques are used to characterise surface-sulphated NCC suspensions as a function of pH, salinity (NaCl) and NCC concentration...
February 12, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28211340/a-contribution-to-improve-the-calculation-of-the-acid-generating-potential-of-mining-wastes
#16
Aurélie Chopard, Mostafa Benzaazoua, Hassan Bouzahzah, Benoît Plante, Philippe Marion
Mine wastes from sulfide-bearing ore extraction and processing are often stored at the surface of mine sites and could generate mine drainage. Prediction tests are completed to predict the water quality associated with the deposition of mining wastes. Static tests can quickly assess the acid-generating potential (AP) and the neutralization potential (NP). Whereas some studies recommend to take into account a mineral reactivity factor for the NP determination, the reactivity rates of acidifying minerals are not considered in the AP calculation...
February 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/28210036/a-study-on-muscle-activity-and-ratio-of-the-knee-extensor-depending-on-the-types-of-squat-exercise
#17
Jeong-Il Kang, Joon-Su Park, Hyun Choi, Dae-Keun Jeong, Hye-Min Kwon, Young-Jun Moon
[Purpose] For preventing the patellofemoral pain syndrome, this study aims to suggest a proper squat method, which presents selective muscle activity of Vastus Medialis Oblique and muscle activity ratios of Vastus Medialis Oblique/Vastus Lateralis by applying squat that is a representative weight bearing exercise method in various ways depending on the surface conditions and knee bending angles. [Subjects and Methods] An isometric squat that was accompanied by hip adduction, depending on the surface condition and the knee joint flexion angle, was performed by 24 healthy students...
January 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28209893/localized-aliphatic-organic-material-on-the-surface-of-ceres
#18
M C De Sanctis, E Ammannito, H Y McSween, A Raponi, S Marchi, F Capaccioni, M T Capria, F G Carrozzo, M Ciarniello, S Fonte, M Formisano, A Frigeri, M Giardino, A Longobardo, G Magni, L A McFadden, E Palomba, C M Pieters, F Tosi, F Zambon, C A Raymond, C T Russell
Organic compounds occur in some chondritic meteorites, and their signatures on solar system bodies have been sought for decades. Spectral signatures of organics have not been unambiguously identified on the surfaces of asteroids, whereas they have been detected on cometary nuclei. Data returned by the Visible and InfraRed Mapping Spectrometer on board the Dawn spacecraft show a clear detection of an organic absorption feature at 3.4 micrometers on dwarf planet Ceres. This signature is characteristic of aliphatic organic matter and is mainly localized on a broad region of ~1000 square kilometers close to the ~50-kilometer Ernutet crater...
February 17, 2017: Science
https://www.readbyqxmd.com/read/28208869/mature-cystic-teratoma-with-co-existent-mucinous-cystadenocarcinoma-in-the-same-ovary-a-diagnostic-dilemma
#19
Sanjeet Roy, Sramana Mukhopadhayay, Mayank Gupta, Anuradha Chandramohan
Mature cystic teratoma co-existing with a mucinous cystadenocarcinoma is an infrequently encountered entity with only a handful of cases reported till date. The possibilities in such a case are either a malignant transformation of a benign teratoma into adenocarcinoma or a collision tumor between a mature cystic teratoma and a mucinous tumour of either a primary ovarian surface epithelial-stromal origin or a secondary from a primary gastrointestinal tract tumour. The importance of distinguishing between the two entities has significant bearing on subsequent therapeutic management...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28203534/comparison-of-methanol-and-isopropanol-as-wash-solvents-for-determination-of-hair-cortisol-concentration-in-grizzly-bears-and-polar-bears
#20
Thomas Kroshko, Luciene Kapronczai, Marc R L Cattet, Bryan J Macbeth, Gordon B Stenhouse, Martyn E Obbard, David M Janz
Methodological differences among laboratories are recognized as significant sources of variation in quantification of hair cortisol concentration (HCC). An important step in processing hair, particularly when collected from wildlife, is the choice of solvent used to remove or "wash" external hair shaft cortisol prior to quantification of HCC. The present study systematically compared methanol and isopropanol as wash solvents for their efficiency at removing external cortisol without extracting internal hair shaft cortisol in samples collected from free-ranging grizzly bears and polar bears...
2017: MethodsX
keyword
keyword
17429
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"