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https://www.readbyqxmd.com/read/28505014/validation-of-a-smartphone-auscultatory-blood-pressure-kit-accutension-xyz-110-in-adults-according-to-the-ansi-aami-iso-81060-2-2013-standard
#1
Guang Chu, Zhi Zhang, Mengdan Xu, Daini Huang, Qiuyan Dai
OBJECTIVE: The aim of this study was to validate the accuracy of the Accutension XYZ-110 blood pressure (BP) kit according to the American National Standards Institute/Association for the Advancement of Medical Instrumentation/International Organization for Standardization (ANSI/AAMI/ISO) 81060-2:2013 standard. PARTICIPANTS AND METHODS: Systolic blood pressure (SBP) and diastolic blood pressure (DBP) were measured simultaneously on the same arm in 85 Chinese adults (female : male=48 : 37) with a mean age of 43...
May 17, 2017: Blood Pressure Monitoring
https://www.readbyqxmd.com/read/28474942/emergence-of-supersymmetric-quantum-electrodynamics
#2
Shao-Kai Jian, Chien-Hung Lin, Joseph Maciejko, Hong Yao
Supersymmetric (SUSY) gauge theories such as the minimal supersymmetric standard model play a fundamental role in modern particle physics, but have not been verified so far in nature. Here, we show that a SUSY gauge theory with dynamical gauge bosons and fermionic gauginos emerges naturally at the pair-density-wave (PDW) quantum phase transition on the surface of a correlated topological insulator hosting three Dirac cones, such as the topological Kondo insulator SmB_{6}. At the quantum tricritical point between the surface Dirac semimetal and nematic PDW phases, three massless bosonic Cooper pair fields emerge as the superpartners of three massless surface Dirac fermions...
April 21, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28448053/automated-contraction-analysis-of-human-engineered-heart-tissue-for-cardiac-drug-safety-screening
#3
Ingra Mannhardt, Umber Saleem, Anika Benzin, Thomas Schulze, Birgit Klampe, Thomas Eschenhagen, Arne Hansen
Cardiac tissue engineering describes techniques to constitute three dimensional force-generating engineered tissues. For the implementation of these procedures in basic research and preclinical drug development, it is important to develop protocols for automated generation and analysis under standardized conditions. Here, we present a technique to generate engineered heart tissue (EHT) from cardiomyocytes of different species (rat, mouse, human). The technique relies on the assembly of a fibrin-gel containing dissociated cardiomyocytes between elastic polydimethylsiloxane (PDMS) posts in a 24-well format...
April 15, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28426946/quantification-of-rubidium-as-a-trace-element-in-beef-using-laser-induced-breakdown-spectroscopy
#4
Y Dixit, Maria P Casado-Gavalda, R Cama-Moncunill, Maria Markiewicz-Keszycka, X Cama-Moncunill, P J Cullen, Carl Sullivan
This study evaluates the potential of laser induced breakdown spectroscopy (LIBS) coupled with chemometrics to develop a quantification model for rubidium (Rb) in minced beef. A LIBSCAN 150 system was used to collect LIBS spectra of minced beef samples. Beef liver was used to spike the Rb levels in minced beef. All samples were dried, powdered and pelleted using a hydraulic press. Measurements were conducted by scanning 100 different locations with an automated XYZ sample chamber. Partial least squares regression (PLSR) was used to develop the calibration model, yielding a calibration coefficient of determination (Rc(2)) of 0...
August 2017: Meat Science
https://www.readbyqxmd.com/read/28370277/3d-electron-microscopic-characterization-of-interstitial-cells-in-the-human-bladder-upper-lamina-propria
#5
Jochen Neuhaus, Birgit Schröppel, Martin Dass, Hans Zimmermann, Hartwig Wolburg, Petra Fallier-Becker, Thomas Gevaert, Claus J Burkhardt, Hoang Minh Do, Jens-Uwe Stolzenburg
AIMS: To explore the ultrastructure of interstitial cells in the upper lamina propria of the human bladder, to describe the spatial relationships and to investigate cell-cell contacts. METHODS: Focused ion beam scanning electron microscopy (FIB-SEM), 3-View SEM and confocal laser scanning microscopy were used to analyze the 3D ultrastructure of the upper lamina propria in male and female human bladders. RESULTS: 3View-SEM image stacks as large as 59 × 59 × 17 μm(3) (xyz) at a resolution of 16 × 16 × 50 nm(3) and high resolution (5 × 5 × 10 nm(3) ) FIB-SEM stacks could be analyzed...
March 31, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/28268576/pixel-based-skin-segmentation-in-psoriasis-images
#6
Y George, M Aldeen, R Garnavi
In this paper, we present a detailed comparison study of skin segmentation methods for psoriasis images. Different techniques are modified and then applied to a set of psoriasis images acquired from the Royal Melbourne Hospital, Melbourne, Australia, with aim of finding the best technique suited for application to psoriasis images. We investigate the effect of different colour transformations on skin detection performance. In this respect, explicit skin thresholding is evaluated with three different decision boundaries (CbCr, HS and rgHSV)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28249537/a-novel-design-of-a-scanning-probe-microscope-integrated-with-an-ultramicrotome-for-serial-block-face-nanotomography
#7
Anton E Efimov, Igor I Agapov, Olga I Agapova, Vladimir A Oleinikov, Alexey V Mezin, Michael Molinari, Igor Nabiev, Konstantin E Mochalov
We present a new concept of a combined scanning probe microscope (SPM)/ultramicrotome apparatus. It enables "slice-and-view" scanning probe nanotomography measurements and 3D reconstruction of the bulk sample nanostructure from series of SPM images after consecutive ultrathin sections. The sample is fixed on a flat XYZ scanning piezostage mounted on the ultramicrotome arm. The SPM measuring head with a cantilever tip and a laser-photodiode tip detection system approaches the sample for SPM measurements of the block-face surface immediately after the ultramicrotome sectioning is performed...
February 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28242414/uv-vis-spectroscopy-and-colorimetric-models-for-detecting-anthocyanin-metal-complexes-in-plants-an-overview-of-in-vitro-and-in-vivo-techniques
#8
REVIEW
Volodymyr S Fedenko, Sergiy A Shemet, Marco Landi
Although anthocyanin (ACN) biosynthesis is one of the best studied pathways of secondary metabolism in plants, the possible physiological and ecological role(s) of these pigments continue to intrigue scientists. Like other dihydroxy B-ring substituted flavonoids, ACNs have an ability to bind metal and metalloid ions, a property that has been exploited for a variety of purposes. For example, the metal binding ability may be used to stabilize ACNs from plant food sources, or to modify their colors for using them as food colorants...
May 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28226754/pixel-based-skin-segmentation-in-psoriasis-images
#9
Y George, M Aldeen, R Garnavi, Y George, M Aldeen, R Garnavi, M Aldeen, Y George, R Garnavi
In this paper, we present a detailed comparison study of skin segmentation methods for psoriasis images. Different techniques are modified and then applied to a set of psoriasis images acquired from the Royal Melbourne Hospital, Melbourne, Australia, with aim of finding the best technique suited for application to psoriasis images. We investigate the effect of different colour transformations on skin detection performance. In this respect, explicit skin thresholding is evaluated with three different decision boundaries (CbCr, HS and rgHSV)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28187885/automated-characterization-and-counting-of-ki-67-protein-for-breast-cancer-prognosis-a-quantitative-immunohistochemistry-approach
#10
Tushar Mungle, Suman Tewary, Indu Arun, Bijan Basak, Sanjit Agarwal, Rosina Ahmed, Sanjoy Chatterjee, Asok Kumar Maity, Chandan Chakraborty
Ki-67 protein expression plays an important role in predicting the proliferative status of tumour cells and deciding the future course of therapy in breast cancer. Immunohistochemical (IHC) determination of Ki-67 score or labelling index, by estimating the fraction of Ki67 positively stained tumour cells, is the most widely practiced method to assess tumour proliferation (Dowsett et al. 2011). Accurate manual counting of these cells (specifically nuclei) due to complex and dense distribution of cells, therefore, becomes critical and presents a major challenge to pathologists...
February 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28186118/dynamic-in-situ-sensing-of-fluid-dispersed-2d-materials-integrated-on-microfluidic-si-chip
#11
Benjamin T Hogan, Sergey A Dyakov, Lorcan J Brennan, Salma Younesy, Tatiana S Perova, Yurii K Gun'ko, Monica F Craciun, Anna Baldycheva
In this work, we propose a novel approach for wafer-scale integration of 2D materials on CMOS photonic chip utilising methods of synthetic chemistry and microfluidics technology. We have successfully demonstrated that this approach can be used for integration of any fluid-dispersed 2D nano-objects on silicon-on-insulator photonics platform. We demonstrate for the first time that the design of an optofluidic waveguide system can be optimised to enable simultaneous in-situ Raman spectroscopy monitoring of 2D dispersed flakes during the device operation...
February 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28130232/anaquin-a-software-toolkit-for-the-analysis-of-spike-in-controls-for-next-generation-sequencing
#12
Ted Wong, Ira W Deveson, Simon A Hardwick, Tim R Mercer
Spike-in controls are synthetic nucleic-acid sequences that are added to a user's sample and constitute internal standards for subsequent steps in the next generation sequencing workflow.The Anaquin software toolkit can be used to analyze the performance of spike-in controls at multiple steps during RNA sequencing or genome sequencing analysis, providing useful diagnostic statistics, data visualization and sample normalization. AVAILABILITY: The software is implemented in C ++/R and is freely available under BSD license...
January 27, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28111034/mathematical-formulae-to-estimate-chronic-subdural-haematoma-volume-flawed-assumption-regarding-ellipsoid-morphology
#13
Appukutty Manickam, Laurence A G Marshman, Ross Johnston, Piers A W Thomas
Mathematical formulae are commonly used to estimate intra-cranial haematoma volume. Such formulae tacitly assume an ellipsoid geometrical morphology. Recently, the 'XYZ/2' formula has been validated and recommended for chronic subdural haematoma (CSDH) volumetric estimation. We aimed to assess the precision and accuracy of mathematical formulae specifically in estimating CSDH volume, and to determine typical CSDH 3-D morphology. Three extant formulae ('XYZ/2', 'π/6·XYZ' and '2/3S·h') were compared against computer-assisted 3D volumetric analysis as Gold standard in CTs where CSDH sufficiently contrasted with brain...
June 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28048210/su-g-jep1-10-feasibility-of-cyberknife-tracking-using-the-previously-implanted-permanent-brachytherapy-seed-cloud
#14
J Cheung, J Cunha, A Sudhyadhom, C McGuinness, M Roach, M Descovich
PURPOSE: Robotic radiosurgery is a salvage treatment option for patients with recurrent prostate cancer. We explored the feasibility of tracking the bolus of permanent prostate implants (PPI) using image recognition software optimized to track spinal anatomy. METHODS: Forty-five inert iodine seeds were implanted into a gelatin-based prostate phantom. Four superficial gold seeds were inserted to provide ground-truth alignment. A CT scan of the phantom (120 kVp, 1 mm slice thickness) was acquired and a single-energy iterative metal artifact reduction (MAR) algorithm was used to enhance the quality of the DRR used for tracking...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047801/we-ab-209-03-adaptive-sbrt-planning-for-interfraction-motion
#15
V Wu, M Epelman, K Brock, M Feng, R Ten Haken, M Matuszak
PURPOSE: Interfraction changes in abdominal SBRT patient anatomy are challenging to address with image guidance alone because avoidance of an overlapping high-priority gastrointestinal normal structure may come at the expense of tumor coverage. This work investigates the benefit of anticipating interfraction motion and exploiting favorable geometries at the time of treatment through dose adaptive planning. METHODS: Beyond no change, six scenarios of duodenum shifts per fraction are generated (±1 cm XYZ) and sample five-fraction paths (combinations of no and/or the indicated changes) are simulated...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28045541/microelectrophoresis-of-silica-rods-using-confocal-microscopy
#16
Henriëtte E Bakker, Thijs H Besseling, Judith E G J Wijnhoven, Peter H Helfferich, Alfons van Blaaderen, Arnout Imhof
The electrophoretic mobility and the zeta potential (ζ) of fluorescently labeled colloidal silica rods, with an aspect ratio of 3.8 and 6.1, were determined with microelectrophoresis measurements using confocal microscopy. In the case where the colloidal particles all move at the same speed parallel to the direction of the electric field, we record a xyz-stack over the whole depth of the capillary. This method is faster and more robust compared to taking xyt-series at different depths inside the capillary to obtain the parabolic flow profile, as was done in previous work from our group...
January 31, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/27857433/method-for-hue-plane-preserving-color-correction
#17
Michal Mackiewicz, Casper F Andersen, Graham Finlayson
Hue plane preserving color correction (HPPCC), introduced by Andersen and Hardeberg [Proceedings of the 13th Color and Imaging Conference (CIC) (2005), pp. 141-146], maps device-dependent color values (RGB) to colorimetric color values (XYZ) using a set of linear transforms, realized by white point preserving 3×3 matrices, where each transform is learned and applied in a subregion of color space, defined by two adjacent hue planes. The hue plane delimited subregions of camera RGB values are mapped to corresponding hue plane delimited subregions of estimated colorimetric XYZ values...
November 1, 2016: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/27829835/innovative-monitoring-of-atmospheric-gaseous-hydrogen-fluoride
#18
Stefano Dugheri, Alessandro Bonari, Ilenia Pompilio, Alessandro Monti, Nicola Mucci, Giulio Arcangeli
Hydrogen fluoride (HF) is a basic raw material for a wide variety of industrial products, with a worldwide production capacity of more than three million metric tonnes. A novel method for determining particulate fluoride and gaseous hydrogen fluoride in air is presented herewith. Air was sampled using miniaturised 13 mm Swinnex two-stage filter holders in a medium-flow pumping system and through the absorption of particulate fluoride and HF vapours on cellulose ester filters uncoated or impregnated with sodium carbonate...
2016: International Journal of Analytical Chemistry
https://www.readbyqxmd.com/read/27752366/swept-source-optical-coherence-tomography-angiography-for-contact-lens-related-corneal-vascularization
#19
Marcus Ang, Yijun Cai, Anna C S Tan
Purpose. To describe a novel technique of adapting a swept-source optical coherence tomography angiography (OCTA) to image corneal vascularization. Methods. In this pilot cross-sectional study, we obtained 3 × 3 mm scans, where 100,000 A-scans are acquired per second with optical axial resolution of 8 μm and lateral resolution of 20 μm. This was performed with manual "XYZ" focus without the anterior segment lens, until the focus of the corneoscleral surface was clearly seen and the vessels of interest were in focus on the corresponding red-free image...
2016: Journal of Ophthalmology
https://www.readbyqxmd.com/read/27699940/amygdala-cortical-connectivity-associations-with-anxiety-development-and-threat
#20
Andrea L Gold, Tomer Shechner, Madeline J Farber, Carolyn N Spiro, Ellen Leibenluft, Daniel S Pine, Jennifer C Britton
BACKGROUND: Amygdala-prefrontal cortex (PFC) functional connectivity may be influenced by anxiety and development. A prior study on anxiety found age-specific dysfunction in the ventromedial PFC (vmPFC), but not amygdala, associated with threat-safety discrimination during extinction recall (Britton et al.). However, translational research suggests that amygdala-PFC circuitry mediates responses following learned extinction. Anxiety-related perturbations may emerge in functional connectivity within this circuit during extinction recall tasks...
October 2016: Depression and Anxiety
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