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https://www.readbyqxmd.com/read/28102419/towards-encoded-particles-for-highly-multiplexed-colorimetric-point-of-care-autoantibody-detection
#1
Gustav Svedberg, Yunjin Jeong, Hunjong Na, Jisung Jang, Peter Nilsson, Sunghoon Kwon, Jesper Gantelius, Helene Andersson Svahn
Highly multiplexed point of care tests could improve diagnostic accuracy and differential diagnostic capacity in for instance emergency medicine and low resource environments. Available technology platforms for POC biomarker detection are typically simplex or low-plexed, whereas common lab-based microarray systems allow for the simultaneous detection of thousands of DNA or protein biomarkers. In this study, we demonstrate a novel suspension particle array platform that utilizes 900 μm bricks for POC amenable colorimetric biomarker detection with an encoding capacity of over two million...
January 19, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28099433/defining-seropositivity-thresholds-for-use-in-trachoma-elimination-studies
#2
Stephanie J Migchelsen, Diana L Martin, Khamphoua Southisombath, Patrick Turyaguma, Anne Heggen, Peter Paul Rubangakene, Hassan Joof, Pateh Makalo, Gretchen Cooley, Sarah Gwyn, Anthony W Solomon, Martin J Holland, Paul Courtright, Rebecca Willis, Neal D E Alexander, David C W Mabey, Chrissy H Roberts
BACKGROUND: Efforts are underway to eliminate trachoma as a public health problem by 2020. Programmatic guidelines are based on clinical signs that correlate poorly with Chlamydia trachomatis (Ct) infection in post-treatment and low-endemicity settings. Age-specific seroprevalence of anti Ct Pgp3 antibodies has been proposed as an alternative indicator of the need for intervention. To standardise the use of these tools, it is necessary to develop an analytical approach that performs reproducibly both within and between studies...
January 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28090611/performance-of-nano-assembly-logic-gates-with-a-dna-multi-hairpin-motif
#3
Lulu Zhang, Annie M Bluhm, Kuan-Jen Chen, Nicholas E Larkey, Sean M Burrows
DNA nano-assemblies have far-reaching implications for molecular computers. Boolean logic gates made from DNA respond to specific combinations of chemical or molecular inputs. In complex samples an assortment of other chemicals and molecules may interfere with the gate's recognition and response mechanisms. For logic gates to accept an increasing number of inputs, while maintaining selectivity, their design must only respond when specific input combinations are available simultaneously. Here we present proof-of-principle for a fluorescent-based nano-assembly logic gate for three inputs...
January 16, 2017: Nanoscale
https://www.readbyqxmd.com/read/28089225/-effectiveness-of-an-individualised-physiotherapy-program-versus-group-therapy-on-neck-pain-and-disability-in-patients-with-acute-and-subacute-mechanical-neck-pain
#4
Leonardo Gregorio Antúnez Sánchez, María de la Casa Almeida, Jesús Rebollo Roldán, Antonio Ramírez Manzano, Rocío Martín Valero, Carmen Suárez Serrano
OBJECTIVE: To compare the efficacy in reducing neck pain and disability in an individualised physiotherapy treatment with group treatment in acute and subacute mechanical neck pain. DESIGN: Randomised clinical trial. LOCATION: Health Area of University Hospital Virgen del Rocío, Seville, Spain. PARTICIPANTS: A total of 90 patients diagnosed with mechanical neck pain of up to one month onset, distributed randomly into two groups: (i)individualised treatment; (ii)group treatment...
January 11, 2017: Atencion Primaria
https://www.readbyqxmd.com/read/28087996/grating-lobes-suppression-by-adding-virtual-receiving-subaperture-in-synthetic-aperture-imaging
#5
Janusz Wojcik, Marcin Lewandowski, Norbert Żołek
A method of suppression of grating lobes is presented, analyzed, and verified. The method is based on creating a Virtual Receiving Subaperture (VRS) by adding virtual transducer elements not existing in the physical layout of the receiver. The VRS channels are filled with data based on signals from real channels. The analytical model of the synthetic aperture imaging system's impulse response is presented to describe the properties of the VRS. The model shows a reduction of the receiving grating lobes' amplitude (with a comparison to the main lobe's amplitude) by a magnitude equal to the number of receiving transducer elements...
December 21, 2016: Ultrasonics
https://www.readbyqxmd.com/read/28081581/differences-in-gene-expression-and-gene-associations-in-epicardial-fat-compared-to-subcutaneous-fat
#6
J Yim, S W Rabkin
Epicardial adipose tissue (EAT) plays a role in cardiac physiology and may contribute to the development of coronary artery disease. Our objective was to determine whether there was a significant difference in gene expression in EAT compared to subcutaneous adipose tissue (SAT) and to identify potential relationships. MEDLINE and EMBASE were searched using the key terms "Epicardial Adipose Tissue" or "Epicardial Fat" in combination with "RNA", "mRNA", or "gene". The entry criteria were studies that presented primary data including expression levels of mRNA in human EAT compared with SAT and an expression of variance (SD)...
January 12, 2017: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
https://www.readbyqxmd.com/read/28079243/serum-levels-of-vitamin-a-visual-function-and-ocular-surface-after-bariatric-surgery
#7
Luana Paula Nogueira de Araújo Brandão, Lucio Vilar, Bernardo Menelau Cavalcanti, Pedro Henrique Amorim Brandão, Tiago Eugênio Faria E Arantes, Josemberg Marins Campos
BACKGROUND: - Bariatric surgery is the most effective treatment for severe obesity, but the surgery increases the risk of developing nutritional deficiencies, such as vitamin A deficiency. In human metabolism, vitamin A plays a role in vision. OBJECTIVE: - To evaluate serum vitamin A, visual function and ocular surface of patients undergoing bariatric surgery. METHODS: - A cross-sectional and analytical study was conduced with 28 patients undergoing bariatric surgery for at least 6 months...
January 2017: Arquivos de Gastroenterologia
https://www.readbyqxmd.com/read/28077842/psychoanalysis-and-the-emigration-of-central-and-eastern-european-intellectuals
#8
Ferenc Erős
One of the most important phenomena in the intellectual history of the 20th century was the exodus of the European mind, the emigration of persons, ideas, techniques, and institutions in the vast areas of social, human, and natural sciences, as well as in literature and the visual arts. Among these exiled intellectuals, psychoanalysts formed a special group. This paper examines the major lines of the emigration of psychoanalysts from the countries of issue to the countries of reception. It focuses, in particular on Hungarian analysts and analytic candidates who left their country of birth in two waves, first after the failure of revolutions in 1918/19 for Berlin, and then after 1938, to escape the Nazis...
December 2016: American Journal of Psychoanalysis
https://www.readbyqxmd.com/read/28075157/visual-occlusion-during-minimally-invasive-surgery-a-contemporary-review-of-methods-to-reduce-laparoscopic-and-robotic-lens-fogging-and-other-sources-of-optical-loss
#9
Todd Galvin Manning, Marlon Perera, Daniel Christidis, Ned Kinnear, Shannon McGrath, Richard O'Beirne, Paul Zotov, Damien M Bolton, Nathan Lawrentschuk
Background Maintenance of optimal vision during minimally invasive surgery is crucial to maintaining operative awareness, efficiency and safety. Hampered vision is commonly caused by laparoscopic lens fogging (LLF) which has prompted the development of various anti-fogging fluids and warming devices. However, limited comparative evidence exists in contemporary literature. Despite technological advancements there remains no consensus as to superior methods to prevent LLF or restore visual acuity once LLF has occurred...
January 11, 2017: Journal of Endourology
https://www.readbyqxmd.com/read/28069495/surface-modification-of-copolymerized-films-from-three-armed-biodegradable-macromers-an-analytical-platform-for-modified-tissue-engineering-scaffolds
#10
Benno M Müller, Rudi Loth, Peter-Georg Hoffmeister, Friederike Zühl, Liv Kalbitzer, Michael C Hacker, Michaela Schulz-Siegmund
: The concept of macromers allows for a broad adjustment of biomaterial properties by macromer chemistry or copolymerization. Copolymerization strategies can also be used to introduce reactive sites for subsequent surface modification. Control over surface features enables adjustment of cellular reactions with regard to site and object of implantation. We designed macromer-derived polymer films which function as non-implantable analytical substrates for the investigation of surface properties of equally composed scaffolds for bone tissue engineering...
January 6, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28067433/plasmonic-imaging-of-the-interfacial-potential-distribution-on-bipolar-electrodes
#11
Meisam Hasheminejad, Yimin Fang, Meng Li, Yingyan Jiang, Wei Wang, Hong-Yuan Chen
Bipolar electrochemistry is based on the gradient distribution of free-electron density along an electrically isolated electrode, which causes a positive electrode potential at one end and a negative potential at the other, allowing for wide applications in analytical chemistry and materials science. To take full advantage of its wireless and high-throughput features, various types of optical probes, such as pH indicators and fluorescence and electrochemiluminescence reagents, have often been used to indirectly monitor the interfacial electron transfer through chromogenic or fluorogenic reactions...
January 9, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28065892/rapid-detection-of-the-plasmid-mediated-quinolone-resistance-determinant-aac-6-ib-cr-in-enterobacteriaceae-by-maldi-tof-ms-analysis
#12
Marina Oviaño, Jose Manuel Rodríguez-Martínez, Álvaro Pascual, Germán Bou
OBJECTIVES: Rapid detection of the plasmid-mediated quinolone resistance determinant AAC(6')-Ib-cr in Enterobacteriaceae by measuring acetyltransferase activity against fluoroquinolones by MALDI-TOF MS analysis. METHODS: The presence of the AAC(6')-Ib-cr enzyme was determined by MS by measuring the acetyltransferase activity of a collection of 81 isogenic Escherichia coli control strains [10 carrying the AAC(6')-Ib-cr enzyme during exposure to ciprofloxacin, norfloxacin and levofloxacin] and further analysis of 36 clinical isolates [25 carrying the AAC(6')-Ib-cr enzyme in addition to different combinations of quinolone resistance mechanisms]...
January 8, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28065423/investigating-the-effects-of-motion-streaks-on-pqct-derived-leg-muscle-density-and-its-association-with-fractures
#13
Adrian C H Chan, Jonathan D Adachi, Alexandra Papaioannou, Andy Kin On Wong
Lower peripheral quantitative computed tomography (pQCT)-derived leg muscle density has been associated with fragility fractures in postmenopausal women. Limb movement during image acquisition may result in motion streaks in muscle that could dilute this relationship. This cross-sectional study examined a subset of women from the Canadian Multicentre Osteoporosis Study. pQCT leg scans were qualitatively graded (1-5) for motion severity. Muscle and motion streak were segmented using semi-automated (watershed) and fully automated (threshold-based) methods, computing area, and density...
January 3, 2017: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/28060696/acute-pancreatitis-and-posterior-reversible-encephalopathy-syndrome-a-case-report
#14
Vítor Magno Pereira, Luís Marote Correia, Tiago Rodrigues, Gorete Serrão Faria
The posterior reversible encephalopathy syndrome is a neurological syndrome characterized by headache, confusion, visual disturbances and seizures associated with identifiable areas of cerebral edema on imaging studies. The authors report the case of a man, 33 years-old, leukodermic with a history of chronic alcohol and tobacco consumption, who is admitted to the emergency department for epigastric pain radiating to the back and vomiting with about six hours of evolution and an intense holocranial headache for two hours...
September 2016: Acta Médica Portuguesa
https://www.readbyqxmd.com/read/28054081/imaging-metals-in-caenorhabditis-elegans
#15
REVIEW
M Aschner, C Palinski, M Sperling, U Karst, T Schwerdtle, J Bornhorst
Systemic trafficking and storage of essential metal ions play fundamental roles in living organisms by serving as essential cofactors in various cellular processes. Thereby metal quantification and localization are critical steps in understanding metal homeostasis, and how their dyshomeostasis might contribute to disease etiology and the ensuing pathologies. Furthermore, the amount and distribution of metals in organisms can provide insight into their underlying mechanisms of toxicity and toxicokinetics. While in vivo studies on metal imaging in mammalian experimental animals are complex, time- and resource-consuming, the nematode Caenorhabditis elegans (C...
January 5, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/28052350/eses-software-for-eulerian-solvent-excluded-surface
#16
Beibei Liu, Bao Wang, Rundong Zhao, Yiying Tong, Guo-Wei Wei
Solvent excluded surface (SES) is one of the most popular surface definitions in biophysics and molecular biology. In addition to its usage in biomolecular visualization, it has been widely used in implicit solvent models, in which SES is usually immersed in a Cartesian mesh. Therefore, it is important to construct SESs in the Eulerian representation for biophysical modeling and computation. This work describes a software package called Eulerian solvent excluded surface (ESES) for the generation of accurate SESs in Cartesian grids...
January 4, 2017: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/28050539/comparative-analysis-of-pain-in-patients-who-underwent-total-knee-replacement-regarding-the-tourniquet-pressure
#17
Marcos George de Souza Leão, Gladys Pedrosa Martins Neta, Lucas Inoue Coutinho, Thiago Montenegro da Silva, Yacov Machado Costa Ferreira, Waryla Raissa Vasconcelos Dias
OBJECTIVES: To evaluate through the visual analog scale (VAS) the pain in patients undergoing total knee replacement (TKR) with different pressures of the pneumatic tourniquet. METHODS: An observational, randomized, descriptive study on an analytical basis, with 60 patients who underwent TKR, divided into two groups, which were matched: a group where TKR was performed with tourniquet pressures of 350 mmHg (standard) and the other with systolic blood pressure plus 100 mmHg (P + 100)...
November 2016: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28047435/mo-de-bra-06-3d-image-acquisition-and-reconstruction-explained-with-online-animations
#18
A Kesner
PURPOSE: Understanding the principles of 3D imaging and image reconstruction is fundamental to the field of medical imaging. Clinicians, technologists, physicists, patients, students, and inquisitive minds all stand to benefit from greater comprehension of the supporting technologies. To help explain the basic principles of 3D imaging, we developed multi-frame animations that convey the concepts of tomographic imaging. The series of free (gif) animations are accessible online, and provide a multimedia introduction to the main concepts of image reconstruction...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047124/su-f-t-468-efficient-scanning-data-analysis-for-tomotherapy
#19
B Sintay, K Pearman, J Maurer, H Liu, T Hayes, D Wiant
PURPOSE: The standard TomoTherapy 2D scanning system requires manual analysis using spreadsheets or similar software. Manual analysis is time consuming and does not allow efficient use of the medical physicist or timely results that may indicate issues during the acquisition of data. The purpose of this study is to determine if an in-house solution can provide timely analysis of TomoTherapy scan data. METHODS: A custom MATLAB program utilizing a streamlined graphical interface was developed to interpret the native scanning data acquired by the TomoTherapy Electrometer Measurement System (TEMS)...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046801/mo-de-207a-07-filtered-iterative-reconstruction-fir-via-proximal-forward-backward-splitting-a-synergy-of-analytical-and-iterative-reconstruction-method-for-ct
#20
H Gao
PURPOSE: This work is to develop a general framework, namely filtered iterative reconstruction (FIR) method, to incorporate analytical reconstruction (AR) method into iterative reconstruction (IR) method, for enhanced CT image quality. METHODS: FIR is formulated as a combination of filtered data fidelity and sparsity regularization, and then solved by proximal forward-backward splitting (PFBS) algorithm. As a result, the image reconstruction decouples data fidelity and image regularization with a two-step iterative scheme, during which an AR-projection step updates the filtered data fidelity term, while a denoising solver updates the sparsity regularization term...
June 2016: Medical Physics
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