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https://www.readbyqxmd.com/read/27926908/community-perceptions-of-biobanking-participation-a-qualitative-study-among-mexican-americans-in-three-texas-cities
#1
Natalia I Heredia, Sarah Krasny, Larkin L Strong, Laura Von Hatten, Lynne Nguyen, Belinda M Reininger, Lorna H McNeill, María E Fernández
BACKGROUND: Most biospecimens in the US are collected from non-Hispanic Whites, limiting the generalizability of findings. There is a need to increase participation in biobanking among ethnic and racial minorities. The purpose of this study was to use qualitative methods to identify factors that may influence Mexican-American individuals' willingness to participate in biobanking. METHODS: We conducted 15 focus groups in three Texas cities with Mexican-American individuals, in both Spanish and English...
December 8, 2016: Public Health Genomics
https://www.readbyqxmd.com/read/27925774/influence-of-backscatter-radiation-on-cranial-reconstruction-implants
#2
Yoshiaki Sakamoto, Naoyoshi Koike, Hideyuki Takei, Mari Ohno, Tomoru Miwa, Kazunari Yoshida, Naoyuki Shigematsu, Kazuo Kishi
OBJECTIVES: We aimed to evaluate backscatter dose variations in different cranial bone implant materials in an experimental model designed to simulate postoperative radiotherapy. METHODS: We assessed the radiation backscatter doses associated with sheet and mesh type titanium plates and hydroxyapatite (HAP) samples (porosity, 35%, 50%, and 85%). The samples were irradiated with 6 MV and 10 MV photon beams from a linear accelerator. Measurements were obtained using an ionization chamber and radiochromic films cut from the same batch...
December 7, 2016: British Journal of Radiology
https://www.readbyqxmd.com/read/27924853/piezoelectric-polymer-gated-ofet-cutting-edge-electro-mechanical-transducer-for-organic-mems-based-sensors
#3
Damien Thuau, Mamatimin Abbas, Guillaume Wantz, Lionel Hirsch, Isabelle Dufour, Cédric Ayela
The growth of micro electro-mechanical system (MEMS) based sensors on the electronic market is forecast to be invigorated soon by the development of a new branch of MEMS-based sensors made of organic materials. Organic MEMS have the potential to revolutionize sensor products due to their light weight, low-cost and mechanical flexibility. However, their sensitivity and stability in comparison to inorganic MEMS-based sensors have been the major concerns. In the present work, an organic MEMS sensor with a cutting-edge electro-mechanical transducer based on an active organic field effect transistor (OFET) has been demonstrated...
December 7, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27924781/development-of-sns2-rgo-nanosheet-composite-for-cost-effective-aqueous-hybrid-supercapacitors
#4
Himani Chauhan, Manoj K Singh, Praveen Kumar, Safir Ahmad Hashmi, Sasanka Deka
The development of low cost supercapacitor cells with unique capacitive properties is essential for many domestic and industrial purposes. Here we report the first ever application of SnS2-reduced graphene oxide (SnS2/RGO) layered nanocomposite as a superior electrode material for symmetric aqueous hybrid supercapacitors. We synthesized SnS2/RGO nanocomposite comprised of nanosheets of SnS2 and graphene oxide via a one-pot hydrothermal approach. in situ as-synthesized SnS2/RGO is devised for the first time to give high specific capacitance 500 Fg(-1), energy density 16...
January 13, 2017: Nanotechnology
https://www.readbyqxmd.com/read/27924434/prophylactic-antibiotics-for-percutaneous-endovascular-procedures
#5
REVIEW
N S Greaves, E Katsogridakis, B Faris, D Murray
Percutaneous endovascular techniques are used increasingly in the vascular armamentarium. Commonly performed as day case procedures under local anaesthetic, they are suited to the highly co-morbid vascular patient population. Furthermore, technological advances have resulted in ever improving outcomes for aneurysmal and occlusive disease. Endovascular procedures such as endovascular aneurysm repair or iliac artery stenting are traditionally associated with reduced infectious complications compared to equivalent open techniques...
December 6, 2016: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/27924316/discovery-of-febi2
#6
James P S Walsh, Samantha M Clarke, Yue Meng, Steven D Jacobsen, Danna E Freedman
Recent advances in high-pressure techniques offer chemists access to vast regions of uncharted synthetic phase space, expanding our experimental reach to pressures comparable to the core of the Earth. These newfound capabilities enable us to revisit simple binary systems in search of compounds that for decades have remained elusive. The most tantalizing of these targets are systems in which the two elements in question do not interact even as molten liquids-so-called immiscible systems. As a prominent example, immiscibility between iron and bismuth is so severe that no material containing Fe-Bi bonds is known to exist...
November 23, 2016: ACS Central Science
https://www.readbyqxmd.com/read/27924314/homogenous-electrocatalytic-oxygen-reduction-rates-correlate-with-reaction-overpotential-in-acidic-organic-solutions
#7
Michael L Pegis, Bradley A McKeown, Neeraj Kumar, Kai Lang, Derek J Wasylenko, X Peter Zhang, Simone Raugei, James M Mayer
Improved electrocatalysts for the oxygen reduction reaction (ORR) are critical for the advancement of fuel cell technologies. Herein, we report a series of 11 soluble iron porphyrin ORR electrocatalysts that possess turnover frequencies (TOFs) from 3 s(-1) to an unprecedented value of 2.2 × 10(6) s(-1). These TOFs correlate with the ORR overpotential, which can be modulated by changing the E1/2 of the catalyst using different ancillary ligands, by changing the solvent and solution acidity, and by changing the catalyst's protonation state...
November 23, 2016: ACS Central Science
https://www.readbyqxmd.com/read/27923327/formation-of-nanofibrous-matrices-3d-scaffolds-and-microspheres-from-theory-to-practice
#8
Chi Ma, Xiaohua Liu
Nanofibrous architecture presents unique biophysical cues to facilitate cellular responses and is considered an indispensable feature of a biomimetic three-dimensional (3D) scaffold and cell carrier. While electrospinning is a widely used method to prepare natural extracellular matrix-like nanofibers, it faces significant challenges to incorporate nanofibrous architecture into well-defined macroporous 3D scaffolds or injectable microspheres. Here we report a non-electrospinning approach that is generally effective at generating nanofibers from a variety of synthetic and natural biodegradable polymers and integrating these nanofibers into (1) 3D scaffolds with constructive geometry and designed internal macropore structures; and (2) injectable microspheres...
December 6, 2016: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/27923163/waste-conversion-into-high-value-ceramics-carbothermal-nitridation-synthesis-of-titanium-nitride-nanoparticles-using-automotive-shredder-waste
#9
Mohannad Mayyas, Farshid Pahlevani, Samane Maroufi, Zhao Liu, Veena Sahajwalla
Environmental concern about automotive shredder residue (ASR) has increased in recent years due to its harmful content of heavy metals. Although several approaches of ASR management have been suggested, these approaches remain commercially unproven. This study presents an alternative approach for ASR management where advanced materials can be generated as a by-product. In this approach, titanium nitride (TiN) has been thermally synthesized by nitriding pressed mixture of automotive shredder residue (ASR) and titanium oxide (TiO2)...
December 3, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27922730/anchoring-nitrogen-doped-tio2-nanocrystals-on-nitrogen-doped-3d-graphene-frameworks-for-enhanced-lithium-storage
#10
Yan Yu, Xiaowu Liu, Zhenzhong Yang, Lin Gu
An advanced architecture design of nitrogen doped TiO2 anchored on nitrogen doped 3D graphene frameworks composites (denoted as N-TiO2/N-3D GFs) have been fabricated by a facile template process and further NH3 treatment. The 3D graphene framework allows the electrolyte penetrate into the inverse opal structure and possess high electronic conductivity. The intimate contact between the N-TiO2 and the graphene suppresses the growth and aggregation of TiO2 nanoparticles during heating process, leading to decreased Li+ diffusion length...
December 6, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27920894/recent-advances-in-the-preparation-and-application-of-multifunctional-iron-oxide-and-liposome-based-nanosystems-for-multimodal-diagnosis-and-therapy
#11
REVIEW
Marzia Marciello, Juan Pellico, Irene Fernandez-Barahona, Fernando Herranz, Jesus Ruiz-Cabello, Marco Filice
Nowadays, thanks to the successful discoveries in the biomedical field achieved in the last two decades, a deeper understanding about the complexity of mechanistic aspects of different pathological processes has been obtained. As a consequence, even the standard therapeutic protocols have undergone a vast redesign. In fact, the awareness about the necessity to progress towards a combined multitherapy in order to potentially increase the final healing chances has become a reality. One of the crucial elements of this novel approach is that large amounts of detailed information are highly needed and in vivo imaging techniques represent one of the most powerful tools to visualize and monitor the pathological state of the patient...
December 6, 2016: Interface Focus
https://www.readbyqxmd.com/read/27920437/developing-a-scalable-artificial-photosynthesis-technology-through-nanomaterials-by-design
#12
Nathan S Lewis
An artificial photosynthetic system that directly produces fuels from sunlight could provide an approach to scalable energy storage and a technology for the carbon-neutral production of high-energy-density transportation fuels. A variety of designs are currently being explored to create a viable artificial photosynthetic system, and the most technologically advanced systems are based on semiconducting photoelectrodes. Here, I discuss the development of an approach that is based on an architecture, first conceived around a decade ago, that combines arrays of semiconducting microwires with flexible polymeric membranes...
December 6, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27918636/4d-printing-of-shape-memory-based-personalized-endoluminal-medical-devices
#13
Matt Zarek, Nicola Mansour, Shir Shapira, Daniel Cohn
The convergence of additive manufacturing and shape-morphing materials is promising for the advancement of personalized medical devices. The capability to transform 3D objects from one shape to another, right off the print bed, is known as 4D printing. Shape memory thermosets can be tailored to have a range of thermomechanical properties favorable to medical devices, but processing them is a challenge because they are insoluble and do not flow at any temperature. This study presents here a strategy to capitalize on a series of medical imaging modalities to construct a printable shape memory endoluminal device, exemplified by a tracheal stent...
December 5, 2016: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/27918453/carbon-nanodots-as-peroxidase-nanozymes-for-biosensing
#14
REVIEW
Bhaskar Garg, Tanuja Bisht
'Nanozymes', a term coined by Scrimin, Pasquato, and co-workers to describe nanomaterials with enzyme-like characteristics, represent an exciting and emerging research area in the field of artificial enzymes. Indubitably, the last decade has witnessed substantial advancements in the design of a variety of functional nanoscale materials, including metal oxides and carbon-based nanomaterials, which mimic the structures and functions of naturally occurring enzymes. Among these, carbon nanodots (C-dots) or carbon quantum dots (CQDs) offer huge potential due to their unique properties as compared to natural enzymes and/or classical artificial enzymes...
December 2, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27918114/confined-metastable-2-line-ferrihydrite-for-affordable-point-of-use-arsenic-free-drinking-water
#15
Avula Anil Kumar, Anirban Som, Paolo Longo, Chennu Sudhakar, Radha Gobinda Bhuin, Soujit Sen Gupta, Anshup, Mohan Udhaya Sankar, Amrita Chaudhary, Ramesh Kumar, Thalappil Pradeep
Arsenic-free drinking water, independent of electrical power and piped water supply, is possible only through advanced and affordable materials with large uptake capacities. Confined metastable 2-line ferrihydrite, stable at ambient temperature, shows continuous arsenic uptake in the presence of other complex species in natural drinking water and an affordable water purification device has been made using the same.
December 5, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27917930/strongly-confined-spoof-surface-plasmon-polaritons-waveguiding-enabled-by-planar-staggered-plasmonic-waveguides
#16
Longfang Ye, Yifan Xiao, Yanhui Liu, Liang Zhang, Guoxiong Cai, Qing Huo Liu
We demonstrate a novel route to achieving highly efficient and strongly confined spoof surface plasmon polaritons (SPPs) waveguides at subwavelength scale enabled by planar staggered plasmonic waveguides (PSPWs). The structure of these new waveguides consists of an ultrathin metallic strip with periodic subwavelength staggered double groove arrays supported by a flexible dielectric substrate, leading to unique staggered EM coupling and waveguiding phenomenon. The spoof SPP propagation properties, including dispersion relations and near field distributions, are numerically investigated...
December 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27917379/current-understanding-of-the-correlation-of-lignin-structure-with-biomass-recalcitrance
#17
REVIEW
Mi Li, Yunqiao Pu, Arthur J Ragauskas
Lignin, a complex aromatic polymer in terrestrial plants, contributes significantly to biomass recalcitrance to microbial and/or enzymatic deconstruction. To reduce biomass recalcitrance, substantial endeavors have been exerted on pretreatment and lignin engineering in the past few decades. Lignin removal and/or alteration of lignin structure have been shown to result in reduced biomass recalcitrance with improved cell wall digestibility. While high lignin content is usually a barrier to a cost-efficient application of bioresources to biofuels, the direct correlation of lignin structure and its concomitant properties with biomass remains unclear due to the complexity of cell wall and lignin structure...
2016: Frontiers in Chemistry
https://www.readbyqxmd.com/read/27917177/progress-on-optimizing-miscanthus-biomass-production-for-the-european-bioeconomy-results-of-the-eu-fp7-project-optimisc
#18
Iris Lewandowski, John Clifton-Brown, Luisa M Trindade, Gerard C van der Linden, Kai-Uwe Schwarz, Karl Müller-Sämann, Alexander Anisimov, C-L Chen, Oene Dolstra, Iain S Donnison, Kerrie Farrar, Simon Fonteyne, Graham Harding, Astley Hastings, Laurie M Huxley, Yasir Iqbal, Nikolay Khokhlov, Andreas Kiesel, Peter Lootens, Heike Meyer, Michal Mos, Hilde Muylle, Chris Nunn, Mensure Özgüven, Isabel Roldán-Ruiz, Heinrich Schüle, Ivan Tarakanov, Tim van der Weijde, Moritz Wagner, Qingguo Xi, Olena Kalinina
This paper describes the complete findings of the EU-funded research project OPTIMISC, which investigated methods to optimize the production and use of miscanthus biomass. Miscanthus bioenergy and bioproduct chains were investigated by trialing 15 diverse germplasm types in a range of climatic and soil environments across central Europe, Ukraine, Russia, and China. The abiotic stress tolerances of a wider panel of 100 germplasm types to drought, salinity, and low temperatures were measured in the laboratory and a field trial in Belgium...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27917020/recent-approaches-in-designing-bioadhesive-materials-inspired-by-mussel-adhesive-protein
#19
REVIEW
Pegah Kord Forooshani, Bruce P Lee
Marine mussels secret protein-based adhesives, which enable them to anchor to various surfaces in a saline, intertidal zone. Mussel foot proteins (Mfps) contain a large abundance of a unique, catecholic amino acid, Dopa, in their protein sequences. Catechol offers robust and durable adhesion to various substrate surfaces and contributes to the curing of the adhesive plaques. In this article, we review the unique features and the key functionalities of Mfps, catechol chemistry, and strategies for preparing catechol-functionalized polymers...
January 1, 2017: Journal of Polymer Science. Part A, Polymer Chemistry
https://www.readbyqxmd.com/read/27916913/uniformly-porous-nanocrystalline-camgfe1-33ti%C3%A2-o12-ceramic-derived-electro-ceramic-nanocomposite-for-impedance-type-humidity-sensor
#20
Ashis Tripathy, Sumit Pramanik, Ayan Manna, Hanie Nadia Shasmin, Zamri Radzi, Noor Azuan Abu Osman
Since humidity sensors have been widely used in many sectors, a suitable humidity sensing material with improved sensitivity, faster response and recovery times, better stability and low hysteresis is necessary to be developed. Here, we fabricate a uniformly porous humidity sensor using Ca, Ti substituted Mg ferrites with chemical formula of CaMgFe1.33Ti₃O12 as humidity sensing materials by solid-sate step-sintering technique. This synthesis technique is useful to control the grain size with increased porosity to enhance the hydrophilic characteristics of the CaMgFe1...
November 30, 2016: Sensors
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