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https://www.readbyqxmd.com/read/27917900/self-cleaning-of-surfaces-the-role-of-surface-wettability-and-dust-types
#1
Yun-Yun Quan, Li-Zhi Zhang, Rong-Hui Qi, Rong-Rong Cai
The self-cleaning property is usually connected to superhydrophobic surfaces (SHSs) where the dust particles can be easily removed by the rolling motion of droplets. It seems that superhydrophobicity (its durability is questionable nowadays) is a necessity. However here, it is disclosed that self-cleaning can also be realized on an ordinary surface by droplet impinging. The effects of surface wettability and the types of dust particles are considered. The self-cleaning is realized by two steps: (1) the pickup of particles by the water-air interface of an impinging droplet, (2) the release of the impinging droplets from the surface...
December 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27914000/from-transformation-to-metastasis-deconstructing-the-extracellular-matrix-in-breast-cancer
#2
Shelly Kaushik, Michael W Pickup, Valerie M Weaver
The extracellular matrix (ECM) is a guiding force that regulates various developmental stages of the breast. In addition to providing structural support for the cells, it mediates epithelial-stromal communication and provides cues for cell survival, proliferation, and differentiation. Perturbations in ECM architecture profoundly influence breast tumor progression and metastasis. Understanding how a dysregulated ECM can facilitate malignant transformation is crucial to designing treatments to effectively target the tumor microenvironment...
December 2, 2016: Cancer Metastasis Reviews
https://www.readbyqxmd.com/read/27908443/a-retrospective-validation-study-of-three-models-to-estimate-the-probability-of-malignancy-in-patients-with-small-pulmonary-nodules-from-a-tertiary-oncology-follow-up-centre
#3
A Talwar, N M Rahman, T Kadir, L C Pickup, F Gleeson
AIM: To estimate the probability of malignancy in small pulmonary nodules (PNs) based on clinical and radiological characteristics in a non-screening population that includes patients with a prior history of malignancy using three validated models. MATERIALS AND METHODS: Retrospective data on clinical and radiological characteristics was collected from the medical records of 702 patients (379 men, 323 women; range 19-94 years) with PNs ≤12 mm in diameter at a single centre...
November 28, 2016: Clinical Radiology
https://www.readbyqxmd.com/read/27908125/a-h%C3%A3-ckel-source-sink-potential-theory-of-pauli-spin-blockade-in-molecular-electronic-devices
#4
Barry T Pickup, Patrick W Fowler, Irene Sciriha
This paper shows how to include Pauli (exclusion principle) effects within a treatment of ballistic molecular conduction that uses the tight-binding Hückel Hamiltonian and the source-sink-potential (SSP) method. We take into account the many-electron ground-state of the molecule and show that we can discuss ballistic conduction for a specific molecular device in terms of four structural polynomials. In the standard one-electron picture, these are characteristic polynomials of vertex-deleted graphs, with spectral representations in terms of molecular-orbital eigenvectors and eigenvalues...
November 28, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27896398/acute-liver-effects-disposition-and-metabolic-fate-of-14-c-fenclozic-acid-following-oral-administration-to-normal-and-bile-cannulated-male-c57bl-6j-mice
#5
Kathryn Pickup, Scott Martin, Elizabeth A Partridge, Huw B Jones, Jonathan Wills, Tim Schulz-Utermoehl, Alan McCarthy, Alison Rodrigues, Chris Page, Kerry Ratcliffe, Sunil Sarda, Ian D Wilson
The distribution, metabolism, excretion and hepatic effects of the human hepatotoxin fenclozic acid were investigated following single oral doses of 10 mg/kg to normal and bile duct-cannulated male C57BL/6J mice. Whole body autoradiography showed distribution into all tissues except the brain, with radioactivity still detectable in blood, kidney and liver at 72 h post-dose. Mice dosed with [(14)C]-fenclozic acid showed acute centrilobular hepatocellular necrosis, but no other regions of the liver were affected...
November 28, 2016: Archives of Toxicology
https://www.readbyqxmd.com/read/27890133/blood-sampling-two-sides-to-the-story
#6
Laura Pickup, Sarah Atkinson, Erik Hollnagel, Paul Bowie, Sandra Gray, Sam Rawlinson, Kate Forrester
This study aimed to investigate why there is variability in taking blood. A multi method Pilot study was completed in four National Health Service Scotland hospitals. Human Factors/Ergonomics principles were applied to analyse data from 50 observations, 15 interviews and 12-months of incident data from all Scottish hospitals. The Functional Resonance Analysis Method (FRAM) was used to understand why variability may influence blood sampling functions. The analysis of the 61 pre blood transfusion sampling incidents highlighted limitations in the data collected to understand factors influencing performance...
March 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/27886651/foam-mat-freeze-drying-of-bifidobacterium-longum-ro175-viability-and-refrigerated-storage-stability
#7
Danilo Izquierdo-López, Jacques Goulet, Cristina Ratti
Foaming as a pretreatment was used prior to freeze-drying of Bifidobacterium longum RO175 to investigate the potential acceleration of the drying rate and increase in microorganism viability after the process. A study on storage of foamed and nonfoamed freeze-dried products at 4 °C completed this study. B. longum RO175 in foamed medium could be freeze-dried in 1/7 to 1/4 of the time required for nonfoamed suspensions. In addition, foamed suspensions presented higher viability immediately after freeze-drying (13...
November 25, 2016: Journal of Food Science
https://www.readbyqxmd.com/read/27827906/t%C3%AE-riii-expression-in-human-breast-cancer-stroma-and-the-role-of-soluble-t%C3%AE-riii-in-breast-cancer-associated-fibroblasts
#8
Bojana Jovanović, Michael W Pickup, Anna Chytil, Agnieszka E Gorska, Kimberly C Johnson, Harold L Moses, Philip Owens
The TGF-β pathway plays a major role in tumor progression through regulation of epithelial and stromal cell signaling. Dysfunction of the pathway can lead to carcinoma progression and metastasis. To gain insight into the stromal role of the TGF-β pathway in breast cancer, we performed laser capture microdissection (LCM) from breast cancer patients and reduction mammoplasty patients. Microdissected tumor stroma and normal breast stroma were examined for gene expression. Expression of the TGF-β type III receptor (TGFBR3) was greatly decreased in the tumor stroma compared to control healthy breast tissue...
November 4, 2016: Cancers
https://www.readbyqxmd.com/read/27820599/tissue-mechanics-promote-idh1-dependent-hif1%C3%AE-tenascin-c-feedback-to-regulate-glioblastoma%C3%A2-aggression
#9
Yekaterina A Miroshnikova, Janna K Mouw, J Matthew Barnes, Michael W Pickup, Johnathan N Lakins, Youngmi Kim, Khadjia Lobo, Anders I Persson, Gerald F Reis, Tracy R McKnight, Eric C Holland, Joanna J Phillips, Valerie M Weaver
Increased overall survival for patients with glioma brain tumours is associated with mutations in the metabolic regulator isocitrate dehydrogenase 1 (IDH1). Gliomas develop within a mechanically challenged microenvironment that is characterized by a dense extracellular matrix (ECM) that compromises vascular integrity to induce hypoxia and activate HIF1α. We found that glioma aggression and patient prognosis correlate with HIF1α levels and the stiffness of a tenascin C (TNC)-enriched ECM. Gain- and loss-of-function xenograft manipulations demonstrated that a mutant IDH1 restricts glioma aggression by reducing HIF1α-dependent TNC expression to decrease ECM stiffness and mechanosignalling...
November 7, 2016: Nature Cell Biology
https://www.readbyqxmd.com/read/27819054/functional-droplets-that-recognize-collect-and-transport-debris-on-surfaces
#10
Ying Bai, Chia-Chih Chang, Umesh Choudhary, Irem Bolukbasi, Alfred J Crosby, Todd Emrick
We describe polymer-stabilized droplets capable of recognizing and picking up nanoparticles from substrates in experiments designed for transporting hydroxyapatite nanoparticles that represent the principal elemental composition of bone. Our experiments, which are inspired by cells that carry out materials transport in vivo, used oil-in-water droplets that traverse a nanoparticle-coated substrate driven by an imposed fluid flow. Nanoparticle capture is realized by interaction of the particles with chemical functionality embedded within the polymeric stabilizing layer on the droplets...
October 2016: Science Advances
https://www.readbyqxmd.com/read/27802756/approach-for-removing-ghost-images-in-remote-field-eddy-current-testing-of-ferromagnetic-pipes
#11
Q W Luo, Y B Shi, Z G Wang, W Zhang, Y Zhang
In the non-destructive testing of ferromagnetic pipes based on remote field eddy currents, an array of sensing coils is often used to detect local defects. While testing, the image that is obtained by sensing coils exhibits a ghost-image, which originates from both the transmitter and sensing coils passing over the same defects in pipes. Ghost-images are caused by transmitters and lead to undesirable assessments of defects. In order to remove ghost-images, two pickup coils are coaxially set to each other in remote field...
October 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27791210/temperature-dependence-of-cross-effect-dynamic-nuclear-polarization-in-rotating-solids-advantages-of-elevated-temperatures
#12
Michel-Andreas Geiger, Marcella Orwick-Rydmark, Katharina Märker, W Trent Franks, Dmitry Akhmetzyanov, Daniel Stöppler, Maximilian Zinke, Edgar Specker, Marc Nazaré, Anne Diehl, Barth-Jan van Rossum, Fabien Aussenac, Thomas Prisner, Ümit Akbey, Hartmut Oschkinat
Dynamic nuclear polarization exploits electron spin polarization to boost signal-to-noise in magic-angle-spinning (MAS) NMR, creating new opportunities in materials science, structural biology, and metabolomics studies. Since protein NMR spectra recorded under DNP conditions can show improved spectral resolution at 180-200 K compared to 110 K, we investigate the effects of AMUPol and various deuterated TOTAPOL isotopologues on sensitivity and spectral resolution at these temperatures, using proline and reproducibly prepared SH3 domain samples...
October 28, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27783554/is-the-currently-used-prescription-adjudication-date-a-good-proxy-for-calculating-medication-refill-adherence
#13
Corey A Lester, Kevin A Look, Michelle A Chui
BACKGROUND: The Centers for Medicare & Medicaid Services (CMS) adopted the proportion of days covered (PDC) calculation for use in their Five-Star Quality Rating System for Medicare Advantage and Prescription Drug Plans. This calculation uses the prescription adjudication date (i.e., date the prescription is billed to the benefits manager by a pharmacy) as a proxy for medication adherence. Adherence programs, such as automatic refill programs, have become commonplace in community pharmacy and have been identified by industry leaders as interfering with the ability to accurately measure adherence using PDC...
November 2016: Journal of Managed Care & Specialty Pharmacy
https://www.readbyqxmd.com/read/27782557/scanning-squid-susceptometers-with-sub-micron-spatial-resolution
#14
John R Kirtley, Lisa Paulius, Aaron J Rosenberg, Johanna C Palmstrom, Connor M Holland, Eric M Spanton, Daniel Schiessl, Colin L Jermain, Jonathan Gibbons, Y-K-K Fung, Martin E Huber, Daniel C Ralph, Mark B Ketchen, Gerald W Gibson, Kathryn A Moler
Superconducting QUantum Interference Device (SQUID) microscopy has excellent magnetic field sensitivity, but suffers from modest spatial resolution when compared with other scanning probes. This spatial resolution is determined by both the size of the field sensitive area and the spacing between this area and the sample surface. In this paper we describe scanning SQUID susceptometers that achieve sub-micron spatial resolution while retaining a white noise floor flux sensitivity of ≈2μΦ0/Hz(1/2). This high spatial resolution is accomplished by deep sub-micron feature sizes, well shielded pickup loops fabricated using a planarized process, and a deep etch step that minimizes the spacing between the sample surface and the SQUID pickup loop...
September 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27780437/whole-body-vibration-exposure-patterns-in-canadian-prairie-farmers
#15
Xiaoke Zeng, Aaron M Kociolek, Muhammad Idrees Khan, Stephan Milosavljevic, Brenna Bath, Catherine Trask
Whole body vibration is a significant physical risk factor associated with low back pain. This study assessed farmers' exposure to whole body vibration on the Canadian prairies according to ISO 2631-1. Eighty-seven vibration measurements were collected with a triaxial accelerometer embedded in a rubber seat pad at the operator-seat interface of agricultural machinery, including tractors, combines, pickup trucks, grain trucks, sprayers, swathers, all-terrain vehicles, and skid steers. Whole body vibration was highest in the vertical axis, with a mean (range) frequency-weighted root mean squared acceleration of 0...
November 21, 2016: Ergonomics
https://www.readbyqxmd.com/read/27740816/broadband-and-resonant-approaches-to-axion-dark-matter-detection
#16
Yonatan Kahn, Benjamin R Safdi, Jesse Thaler
When ultralight axion dark matter encounters a static magnetic field, it sources an effective electric current that follows the magnetic field lines and oscillates at the axion Compton frequency. We propose a new experiment to detect this axion effective current. In the presence of axion dark matter, a large toroidal magnet will act like an oscillating current ring, whose induced magnetic flux can be measured by an external pickup loop inductively coupled to a SQUID magnetometer. We consider both resonant and broadband readout circuits and show that a broadband approach has advantages at small axion masses...
September 30, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27712281/more-holes-than-cheese-what-prevents-the-delivery-of-effective-high-quality-and-safe-healthcare-in-england
#17
Sue Hignett, Alexandra Lang, Laura Pickup, Christine Ives, Mike Fray, Celine McKeown, Sarah Tapley, Matthew Woodward, Paul Bowie
What prevents the delivery of effective, high quality, and safe healthcare in the National Health Service (NHS) in England? This paper presents 760 challenges which 330 NHS staff reported as preventing the delivery of effective, high quality and safe care. Some problems have been known for over 25 years (staff shortages, finance and patient complexity) but other challenges raise questions about the commitment of the NHS to patient and staff safety. For example Organisational Culture leading to 'stifling bureaucracy', 'odds stacked against smooth […] working' and Workload resulting in 'firefighting daily' and 'perpetual crisis mode'...
October 7, 2016: Ergonomics
https://www.readbyqxmd.com/read/27677216/a-two-step-functional-impression-technique-for-the-fabrication-of-an-implant-retained-silicone-auricular-prosthesis
#18
Tanveer Sheikh Waqas, Binit Shrestha, M L Theerathavaj Srithavaj, Natdhanai Chotprasert
Excessive movement of the underlying tissue bed can lead to poor retention of an implant-retained silicone auricular prosthesis. This article describes a 2-step impression technique with a secondary functional pickup impression of the wax pattern. A wide range of tissue movements can be recorded while maintaining a stable relationship between the abutment analog assembly and retentive elements. The definitive cast is modified accordingly to provide an accurate reproduction of the patient's tissues during function, thus, increasing the overall retention and stability of the definitive prosthesis...
September 24, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27664967/comparison-of-in-vivo-and-ex-vivo-mri-of-the-human-hippocampal-formation-in-the-same-subjects
#19
L E M Wisse, D H Adler, R Ittyerah, J B Pluta, J L Robinson, T Schuck, J Q Trojanowski, M Grossman, J A Detre, M A Elliott, J B Toledo, W Liu, S Pickup, S R Das, D A Wolk, P A Yushkevich
Multiple techniques for quantification of hippocampal subfields from in vivo MRI have been proposed. Linking in vivo MRI to the underlying histology can help validate and improve these techniques. High-resolution ex vivo MRI can provide an intermediate modality to map information between these very different imaging modalities. This article evaluates the ability to match information between in vivo and ex vivo MRI in the same subjects. We perform rigid and deformable registration on 10 pairs of in vivo (3 T, 0...
September 24, 2016: Cerebral Cortex
https://www.readbyqxmd.com/read/27649180/mechatronic-development-and-vision-feedback-control-of-a-nanorobotics-manipulation-system-inside-sem-for-nanodevice-assembly
#20
Zhan Yang, Yaqiong Wang, Bin Yang, Guanghui Li, Tao Chen, Masahiro Nakajima, Lining Sun, Toshio Fukuda
Carbon nanotubes (CNT) have been developed in recent decades for nanodevices such as nanoradios, nanogenerators, carbon nanotube field effect transistors (CNTFETs) and so on, indicating that the application of CNTs for nanoscale electronics may play a key role in the development of nanotechnology. Nanorobotics manipulation systems are a promising method for nanodevice construction and assembly. For the purpose of constructing three-dimensional CNTFETs, a nanorobotics manipulation system with 16 DOFs was developed for nanomanipulation of nanometer-scale objects inside the specimen chamber of a scanning electron microscope (SEM)...
2016: Sensors
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