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https://www.readbyqxmd.com/read/28343005/development-of-a-uv-crosslinked-biodegradable-hydrogel-containing-adipose-derived-stem-cells-to-promote-vascularization-for-skin-wounds-and-tissue-engineering
#1
Gozde Eke, Naside Mangir, Nesrin Hasirci, Sheila MacNeil, Vasif Hasirci
The aim of this study was to design a dermal substitute containing adipose derived stem cells (ADSC) that can be used to improve the regeneration of skin on difficult wound beds by stimulating rapid neovascularization. This was achieved by first synthesizing methacrylated gelatin (GelMA) and methacrylated hyaluronic acid (HAMA) precursors which could be stored at -80 (o)C after lyophilisation. Polymer precursors were then dissolved in media (in 15:1 ratio), ADSCs added together with the photoinitiator and crosslinked with 40 s of UV...
March 18, 2017: Biomaterials
https://www.readbyqxmd.com/read/28342997/the-author-s-reply-to-n-r-haddaway
#2
M Cristina Mangano, G Sarà
In this reply we respond to the commentary of Dr. Haddaway addressed in searching for pitfalls in our systematic mapping exercise "Collating science-based evidence to inform public opinion on the environmental effects of marine drilling platforms in the Mediterranean Sea" recently published in Journal of Environmental Management (Mangano, M.C. and Sarà, G. 2017. Journal of Environmental Management 188: 195-202). We discussed each so called "pitfalls" and, in our opinion, the main cornerstones of systematic map - SM (repeatability, comprehensiveness, transparency, traceability, quality, generalizability) are safe guaranteeing the "gold standard" required by this technique...
March 23, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28340521/stable-and-controllable-synthesis-of-silver-nanowires-for-transparent-conducting-film
#3
Bitao Liu, Hengqing Yan, Shanyong Chen, Youwei Guan, Guoguo Wu, Rong Jin, Lu Li
Silver nanowires without particles are synthesized by a solvothermal method at temperature 150 °C. Silver nanowires are prepared via a reducing agent of glycerol and a capping agent of polyvinylpyrrolidone (M w  ≈ 1,300,000). Both of them can improve the purity of the as-prepared silver nanowires. With controllable shapes and sizes, silver nanowires are grown continuously up to 10-20 μm in length with 40-50 nm in diameter. To improve the yield of silver nanowires, the different concentrations of AgNO3 synthesis silver nanowires are discussed...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28339561/computational-models-used-to-assess-us-tobacco-control-policies
#4
Shari P Feirman, Allison M Glasser, Shyanika Rose, Ray Niaura, David B Abrams, Lyubov Teplitskaya, Andrea C Villanti
Introduction: Simulation models can be used to evaluate existing and potential tobacco control interventions, including policies. The purpose of this systematic review was to synthesize evidence from computational models used to project population-level effects of tobacco control interventions. We provide recommendations to strengthen simulation models that evaluate tobacco control interventions. Methods: Studies were eligible for review if they employed a computational model to predict the expected effects of a non-clinical US-based tobacco control intervention...
January 21, 2017: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/28339115/near-ir-and-cp-oct-imaging-of-suspected-occlusal-caries-lesions
#5
Jacob C Simon, Hobin Kang, Michal Staninec, Andrew T Jang, Kenneth H Chan, Cynthia L Darling, Robert C Lee, Daniel Fried
INTRODUCTION: Radiographic methods have poor sensitivity for occlusal lesions and by the time the lesions are radiolucent they have typically progressed deep into the dentin. New more sensitive imaging methods are needed to detect occlusal lesions. In this study, cross-polarization optical coherence tomography (CP-OCT) and near-IR imaging were used to image questionable occlusal lesions (QOC's) that were not visible on radiographs but had been scheduled for restoration on 30 test subjects...
March 24, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28338485/creation-of-a-regional-human-milk-assembly-a-model-to-influence-practice-and-policy-change-in-the-nicu
#6
Diane L Spatz, Amanda Evans, Elizabeth Froh
BACKGROUND: The 2011 Surgeon General's Call to Action to Support Breastfeeding highlights a need for optimizing lactation-based education for all health professionals; however, few schools of nursing and medicine offer lactation-based curriculum. In an effort to address these gaps in education and care, the director of the lactation program at a large urban children's hospital developed and instituted the annual regional Human Milk Assembly (HMA), a half-day collaborative meeting of the hospital's regional and referral hospitals' neonatal intensive care unit (NICU) nursing staff, to address lactation-based educational and training needs of all participating institutions...
March 23, 2017: Advances in Neonatal Care: Official Journal of the National Association of Neonatal Nurses
https://www.readbyqxmd.com/read/28338043/redshifted-cherenkov-radiation-for-in-vivo-imaging-coupling-cherenkov-radiation-energy-transfer-to-multiple-f%C3%A3-rster-resonance-energy-transfers
#7
Yann Bernhard, Bertrand Collin, Richard A Decréau
Cherenkov Radiation (CR), this blue glow seen in nuclear reactors, is an optical light originating from energetic β-emitter radionuclides. CR emitter (90)Y triggers a cascade of energy transfers in the presence of a mixed population of fluorophores (which each other match their respective absorption and emission maxima): Cherenkov Radiation Energy Transfer (CRET) first, followed by multiple Förster Resonance Energy transfers (FRET): CRET ratios were calculated to give a rough estimate of the transfer efficiency...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28337979/monolayer-optical-memory-cells-based-on-artificial-trap-mediated-charge-storage-and-release
#8
Juwon Lee, Sangyeon Pak, Young-Woo Lee, Yuljae Cho, John Hong, Paul Giraud, Hyeon Suk Shin, Stephen M Morris, Jung Inn Sohn, SeungNam Cha, Jong Min Kim
Monolayer transition metal dichalcogenides are considered to be promising candidates for flexible and transparent optoelectronics applications due to their direct bandgap and strong light-matter interactions. Although several monolayer-based photodetectors have been demonstrated, single-layered optical memory devices suitable for high-quality image sensing have received little attention. Here we report a concept for monolayer MoS2 optoelectronic memory devices using artificially-structured charge trap layers through the functionalization of the monolayer/dielectric interfaces, leading to localized electronic states that serve as a basis for electrically-induced charge trapping and optically-mediated charge release...
March 24, 2017: Nature Communications
https://www.readbyqxmd.com/read/28337793/solvent-regulated-self-assembly-of-achiral-donor-acceptor-complex-in-confined-chiral-nanotubes-chirality-transfer-inversion-and-amplification
#9
Yuangang Li, Pengfei Duan, Minghua Liu
A chiral gelator was designed and found to form chiral nanotwist and nanotube in toluene and DMSO, respectively, which could serve as host chiral matrixes for fabricating functional soft materials. Guest achiral π-conjugated donor and acceptor were doped in the gel and a solvent regulated self-assembly was observed. Although both the DMSO and toluene gels containing three components look similar as the transparent gels, it was clarified microscopically that while achiral dopants self-assembled in the confined nanotubes in DMSO gel, they only dissolve in the liquid phase in toluene gel...
March 24, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28336962/optomechanically-induced-transparency-of-x-rays-via-optical-control
#10
Wen-Te Liao, Adriana Pálffy
The search for new control methods over light-matter interactions is one of the engines that advances fundamental physics and applied science alike. A specific class of light-matter interaction interfaces are setups coupling photons of distinct frequencies via matter. Such devices, nontrivial in design, could be endowed with multifunctional tasking. Here we envisage for the first time an optomechanical system that bridges optical and robust, high-frequency x-ray photons, which are otherwise notoriously difficult to control...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28336848/effects-of-iodine-doping-on-optoelectronic-and-chemical-properties-of-polyterpenol-thin-films
#11
Kateryna Bazaka, Mohan V Jacob
Owing to their amorphous, highly cross-liked nature, most plasma polymers display dielectric properties. This study investigates iodine doping as the means to tune optoelectronic properties of plasma polymer derived from a low-cost, renewable resource, i.e., Melaleuca alternifolia oil. In situ exposure of polyterpenol to vapors of electron-accepting dopant reduced the optical band gap to 1.5 eV and increased the conductivity from 5.05 × 10(-8) S/cm to 1.20 × 10(-6) S/cm. The increased conductivity may, in part, be attributed to the formation of charge-transfer complexes between the polymer chain and halogen, which act as a cation and anion, respectively...
January 13, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28336804/beyond-privacy-and-exposure-ethical-issues-within-citizen-facing-analytics
#12
Peter Grindrod
We discuss the governing forces for analytics, especially concerning citizens' behaviours and their transactions, that depend on which of three spheres of operation an institution is in (corporate, public sector/government and academic). We argue that aspirations and missions also differ by sphere even as digital spaces have drawn these spheres ever closer together. We propose that citizens' expectations and implicit permissions for any exploitation of their data require the perception of a fair balance of benefits, which should be transparent (accessible to citizens) and justifiable...
December 28, 2016: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/28336798/data-science-ethics-in-government
#13
REVIEW
Cat Drew
Data science can offer huge opportunities for government. With the ability to process larger and more complex datasets than ever before, it can provide better insights for policymakers and make services more tailored and efficient. As with all new technologies, there is a risk that we do not take up its opportunities and miss out on its enormous potential. We want people to feel confident to innovate with data. So, over the past 18 months, the Government Data Science Partnership has taken an open, evidence-based and user-centred approach to creating an ethical framework...
December 28, 2016: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/28336795/the-opportunities-and-ethics-of-big-data-practical-priorities-for-a-national-council-of-data-ethics
#14
REVIEW
Olivia Varley-Winter, Hetan Shah
In order to generate the gains that can come from analysing and linking big datasets, data holders need to consider the ethical frameworks, principles and applications that help to maintain public trust. In the USA, the National Science Foundation helped to set up a Council for Big Data, Ethics and Society, of which there is no equivalent in the UK. In November 2015, the Royal Statistical Society convened a workshop of 28 participants from government, academia and the private sector, and discussed the practical priorities that might be assisted by a new Council of Data Ethics in the UK...
December 28, 2016: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/28335860/-muscling-throughout-life-integrating-studies-of-muscle-development-homeostasis-and-disease-in-zebrafish
#15
Michelle F Goody, Erin V Carter, Elisabeth A Kilroy, Lisa Maves, Clarissa A Henry
The proper development and function of skeletal muscle is vital for health throughout the lifespan. Skeletal muscle function enables posture, breathing, and locomotion; and also impacts systemic processes-such as metabolism, thermoregulation, and immunity. Diseases of skeletal muscle (myopathies, muscular dystrophies) and even some neurological, age-related, and metabolic diseases compromise muscle function and negatively affect health span and quality of life. There have been numerous, recent examples of studies on skeletal muscle development with exciting, therapeutic implications for muscle diseases...
2017: Current Topics in Developmental Biology
https://www.readbyqxmd.com/read/28335799/convergent-and-sequential-synthesis-designs-implications-for-conducting-and-reporting-systematic-reviews-of-qualitative-and-quantitative-evidence
#16
Quan Nha Hong, Pierre Pluye, Mathieu Bujold, Maggy Wassef
BACKGROUND: Systematic reviews of qualitative and quantitative evidence can provide a rich understanding of complex phenomena. This type of review is increasingly popular, has been used to provide a landscape of existing knowledge, and addresses the types of questions not usually covered in reviews relying solely on either quantitative or qualitative evidence. Although several typologies of synthesis designs have been developed, none have been tested on a large sample of reviews. The aim of this review of reviews was to identify and develop a typology of synthesis designs and methods that have been used and to propose strategies for synthesizing qualitative and quantitative evidence...
March 23, 2017: Systematic Reviews
https://www.readbyqxmd.com/read/28335453/a-spatially-offset-raman-spectroscopy-method-for-non-destructive-detection-of-gelatin-encapsulated-powders
#17
Kuanglin Chao, Sagar Dhakal, Jianwei Qin, Yankun Peng, Walter F Schmidt, Moon S Kim, Diane E Chan
Non-destructive subsurface detection of encapsulated, coated, or seal-packaged foods and pharmaceuticals can help prevent distribution and consumption of counterfeit or hazardous products. This study used a Spatially Offset Raman Spectroscopy (SORS) method to detect and identify urea, ibuprofen, and acetaminophen powders contained within one or more (up to eight) layers of gelatin capsules to demonstrate subsurface chemical detection and identification. A 785-nm point-scan Raman spectroscopy system was used to acquire spatially offset Raman spectra for an offset range of 0 to 10 mm from the surfaces of 24 encapsulated samples, using a step size of 0...
March 18, 2017: Sensors
https://www.readbyqxmd.com/read/28335289/copper-micro-labyrinth-with-graphene-skin-new-transparent-flexible-electrodes-with-ultimate-low-sheet-resistivity-and-superior-stability
#18
Hak Ki Yu
We have developed self-assembled copper (Cu) micro-labyrinth (ML) with graphene skin for transparent flexible electrodes of optoelectronic devices. The Cu ML is simply formed by heating a thin Cu film with a 100-nm thickness on a SiO₂/Si substrate at 950 °C under hydrogen ambient to block the oxidation. Moreover, the Cu ML can have graphene skin at the surface by inserting carbo-hydroxyl molecules (CxHy) during heating due to the catalytic decomposition of C-H bonds on the Cu surface. The Cu ML with graphene skin (Cu ML-G) has superior sheet resistivity below 5 Ω/sq and mechanical flexibility without cracks at the bending radius of 0...
September 1, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335282/inverter-circuits-using-zno-nanoparticle-based-thin-film-transistors-for-flexible-electronic-applications
#19
Fábio F Vidor, Thorsten Meyers, Ulrich Hilleringmann
Innovative systems exploring the flexibility and the transparency of modern semiconducting materials are being widely researched by the scientific community and by several companies. For a low-cost production and large surface area applications, thin-film transistors (TFTs) are the key elements driving the system currents. In order to maintain a cost efficient integration process, solution based materials are used as they show an outstanding tradeoff between cost and system complexity. In this paper, we discuss the integration process of ZnO nanoparticle TFTs using a high-k resin as gate dielectric...
August 23, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335209/dye-doped-fluorescent-silica-nanoparticles-for-live-cell-and-in-vivo-bioimaging
#20
REVIEW
Wen-Han Zhang, Xiao-Xiao Hu, Xiao-Bing Zhang
The need for novel design strategies for fluorescent nanomaterials to improve our understanding of biological activities at the molecular level is increasing rapidly. Dye-doped fluorescent silica nanoparticles (SiNPs) emerge with great potential for developing fluorescence imaging techniques as a novel and ideal platform for the monitoring of living cells and the whole body. Organic dye-containing fluorescent SiNPs exhibit many advantages: they have excellent biocompatibility, are non-toxic, highly hydrophilic, optically transparent, size-tunable and easily modified with various biomolecules...
April 27, 2016: Nanomaterials
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