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https://www.readbyqxmd.com/read/29235852/in-situ-alloying-of-thermally-conductive-polymer-composites-by-combining-liquid-and-solid-metal-micro-additives
#1
Matthew I Ralphs, Nicholas Kemme, Prathamesh B Vartak, Emil Joseph, Sujal Tipnis, Scott Turnage, Kiran N Solanki, Robert Y Wang, Konrad Rykaczewski
Room temperature liquid metals (LMs) are attractive candidates for thermal interface materials (TIMs) because of their moderately high thermal conductivity and liquid nature, which allows them to conform well to mating surfaces with little thermal resistance. However, gallium-based LMs may be of concern due to the gallium-driven degradation of many metal micro-electronic components. We present a three-component composite with LM, copper (Cu) microparticles, and a polymer matrix, as a cheaper, non-corrosive solution...
December 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29235519/strengthening-face-centered-cubic-crystals-by-annealing-induced-nano-twins
#2
Barna Roy, Jayanta Das
Usually, cold working strengthen metals and alloys by introducing large population of dislocations, whereas annealing of cold worked metal recovers the structure, annihilates dislocations, forms new strain-free grains, and results loss of strength. Here, we report annealing-hardening at temperature well below stress relieving and recrystallization temperatures in contrast to the typical behavior. A large amount of structural defects, such as dislocations, grain boundaries, twins, and stacking faults, have been introduced in nanostructured α-brass by cryorolling...
December 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29235212/high-performance-as-cast-nonfullerene-polymer-solar-cells-with-thicker-active-layer-and-large-area-exceeding-11-power-conversion-efficiency
#3
Qunping Fan, Yan Wang, Maojie Zhang, Bo Wu, Xia Guo, Yufeng Jiang, Wanbin Li, Bing Guo, Chennan Ye, Wenyan Su, Jin Fang, Xuemei Ou, Feng Liu, Zhixiang Wei, Tze Chien Sum, Thomas P Russell, Yongfang Li
In this work, a nonfullerene polymer solar cell (PSC) based on a wide bandgap polymer donor PM6 containing fluorinated thienyl benzodithiophene (BDT-2F) unit and a narrow bandgap small molecule acceptor 2,2'-((2Z,2'Z)-((4,4,9,9-tetrahexyl-4,9-dihydro-s-indaceno[1,2-b:5,6-b']dithiophene-2,7-diyl)bis(methanylylidene))bis(3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile (IDIC) is developed. In addition to matched energy levels and complementary absorption spectrum with IDIC, PM6 possesses high crystallinity and strong π-π stacking alignment, which are favorable to charge carrier transport and hence suppress recombination in devices...
December 13, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29235202/three-dimensional-static-articulation-accuracy-of-virtual-models-part-i-system-trueness-and-precision
#4
Sophia Hui Xin Yee, Roxanna Jean Esguerra, Amelia Anya Qin'An Chew, Keng Mun Wong, Keson Beng Choon Tan
PURPOSE: To evaluate the 3D static articulation accuracy of 3 model scanner-CAD systems (Ceramill Map400 [AG], inEos X5 [SIR], Scanner S600 Arti [ZKN]) using a coordinate measuring machine (CMM). Trueness and precision for each system will be reported in Part I. MATERIALS AND METHODS: The master model simulated a single crown opposing a 3-unit fixed dental prosthesis. Five mounted stone cast sets were prepared, and one set was randomly selected. Reference values were obtained by measuring interarch and interocclusal reference features with the CMM...
December 13, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29234986/exertional-rhabdomyolysis-leading-to-acute-kidney-injury-when-genetic-defects-are-diagnosed-in-adult-life
#5
David Cucchiari, Irene Colombo, Ottavia Amato, Manuel Alfredo Podestà, Francesco Reggiani, Rossella Valentino, Irene Faravelli, Silvia Testolin, Maurizio Moggio, Salvatore Badalamenti
Rhabdomyolysis is a common cause of acute kidney injury (AKI) that is usually triggered by trauma. However, less common causes of rhabdomyolysis may precipitate AKI as well, possibly representing a diagnostic challenge even for the experienced nephrologist. Genetic defects of muscle metabolism represent one of these causes and can be overlooked in adults, since these diseases usually become apparent in childhood. We present here a case in which an adult patient with severe exertional rhabdomyolysis leading to AKI was finally diagnosed with a genetic defect of lipid metabolism...
December 12, 2017: CEN Case Reports
https://www.readbyqxmd.com/read/29234203/cholemic-or-bile-cast-nephropathy-in-a-child-with-liver-failure
#6
Vikrant Sood, Bikrant B Lal, Suman Lata, Archana Rastogi, Seema Alam
Cholemic or bile cast nephropathy is an under-reported entity characterized by acute renal dysfunction in patients with hepatic insult. Limited literature is available regarding its clinical presentation, pathogenesis and prognosis. We hereby present a pediatric case who presented with acute on chronic liver failure with renal dysfunction secondary to cholemic nephropathy.
December 2017: Journal of Clinical and Experimental Hepatology
https://www.readbyqxmd.com/read/29234094/facile-fabrication-of-porous-conductive-thermoplastic-polyurethane-nanocomposite-films-via-solution-casting
#7
Tongfei Wu, Biqiong Chen
Porous conductive polymers are one of important materials, featuring lightweight, large specific surface area and high porosity. Non-solvent induced phase separation is widely employed to prepare porous polymer sheet materials. Through utilizing water vapor in ambient environment as the non-solvent, a facile approach was developed to produce porous conductive polymer nanocomposites using the conventional solution-casting method. Without using any non-solvent liquids, porous carbon nanofiber/thermoplastic polyurethane (CNF/TPU) nanocomposites were prepared directly by solution casting of their dimethylformamide (DMF) solutions under ambient conditions...
December 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29234004/harmonic-phase-in-polar-liquids-and-spin-ice
#8
Steven T Bramwell
Many liquid or liquid-like states remain stable down to temperatures well below the interaction energy scale, where mean-field theory predicts an ordering transition. In magnetism, correlated states such as spin ice and the spin liquid have been described as Coulomb phases, governed by an emergent gauge principle. In the physical chemistry of polar liquids, systems that evade mean field order have, in contrast, been described by Onsager's theory of the reaction field. Here we observe that in the low-temperature limit, Onsager's theory may be cast as a prototypical theory of the Coulomb phase...
December 12, 2017: Nature Communications
https://www.readbyqxmd.com/read/29232710/stabilizing-patterns-in-time-neural-network-approach
#9
Nadav Ben-Shushan, Misha Tsodyks
Recurrent and feedback networks are capable of holding dynamic memories. Nonetheless, training a network for that task is challenging. In order to do so, one should face non-linear propagation of errors in the system. Small deviations from the desired dynamics due to error or inherent noise might have a dramatic effect in the future. A method to cope with these difficulties is thus needed. In this work we focus on recurrent networks with linear activation functions and binary output unit. We characterize its ability to reproduce a temporal sequence of actions over its output unit...
December 12, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/29232570/development-of-an-orthosis-for-simultaneous-three-dimensional-correction-of-clubfoot-deformity
#10
Kanwaljit S Khas, Pulak M Pandey, Alok R Ray
BACKGROUND: Clubfoot is a three-dimensional deformity of the foot in which the foot is twisted in three mutually perpendicular planes from the normal shape of the foot. Of the various treatment methods that are available to manage clubfoot, non-operative approaches are preferred. The conventional non-operative method of treatment is to apply a series of casts to the infant's clubfoot to gradually manipulate its position. However, prolonged use of casts can result in skin rash, skin dehydration and ulcers on the soft skin of an infant...
December 6, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29231889/exploring-the-caste-specific-multi-layer-defense-mechanism-of-formosan-subterranean-termites-coptotermes-formosanus-shiraki
#11
Abid Hussain, Ming-Yi Tian, Shuo-Yang Wen
The survival and foraging of Coptotermesformosanus Shiraki in a microbe-rich environment reflect the adaptation of an extraordinary, sophisticated defense mechanism by the nest-mates. We aimed to explore the host pathogen interaction by studying caste-specific volatile chemistry and genes encoding the antioxidant defense of winged imagoes, nymphs, soldiers and workers of Formosan subterranean termites. Qualitative analyses of C.formosanus Shiraki performed by HS-SPME/GC-MS showed considerable variations in the chemical composition of volatile organic compounds (VOCs) and their proportions among all the castes...
December 12, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29230541/theoretical-and-experimental-investigation-into-a-eutectic-system-of-3-4-dinitropyrazole-and-1-methyl-3-4-5-trinitropyrazole
#12
Shuang-Fei Zhu, Shu-Hai Zhang, Rui-Jun Gou, Fu-de Ren
Eutectic mixtures of 3,4-dinitropyrazole (DNP) and 1-methyl-3,4,5-trinitropyrazole (MTNP) were investigated by theoretical and experimental methods. The mass ratio of DNP and MTNP ranged from 0:100 to 100:0. Melting points of the mixtures were predicted through observing the inflection point of a specific volume vs. temperature in molecular dynamics (MD) simulation. The results are in good agreement with experimental results obtained from the differential scanning calorimeter (DSC) study. The binding energy of a 50/50 DNP/MTNP eutectic mixture is lower than those of other mixtures, in accordance with the common sense that the melting point of materials is linked to the strength of intermolecular interactions...
December 11, 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/29230497/triple-in-situ-antegrade-laser-fenestration-of-aortic-stent-graft-extension-using-fusion-imaging-for-urgent-treatment-of-symptomatic-abdominal-aneurysm-with-type-1-endoleak
#13
Joseph Touma, Hicham Kobeiter, Marek Majewski, Vania Tacher, Pascal Desgranges
The present report describes the management of massive proximal type 1 endoleak with an enlarged symptomatic aneurysmal sac. Urgent treatment was performed using in situ laser fenestration of an aortic proximal extension facing renovisceral ostia. Image fusion was obtained intraoperatively. For each target vessel (superior mesenteric and two renal arteries), an Aptus HeliFX steerable sheath (Medtronic) inserted through femoral access was curved to face the vessel's ostium marker. A laser catheter (Spectranetics) was used to traverse the stent-graft and insert a 0...
December 11, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/29229651/in-situ-measurements-of-saturn-s-ionosphere-show-that-it-is-dynamic-and-interacts-with-the-rings
#14
J-E Wahlund, M W Morooka, L Z Hadid, A M Persoon, W M Farrell, D A Gurnett, G Hospodarsky, W S Kurth, S-Y Ye, D J Andrews, N J T Edberg, A I Eriksson, E Vigren
The ionized upper layer of Saturn's atmosphere, its ionosphere, provides a closure of currents mediated by the magnetic field to other electrically charged regions (e.g., rings) and hosts ion - molecule chemistry. In 2017, the Cassini spacecraft passed inside the planet's rings, allowing in situ measurements of the ionosphere. The Radio and Plasma Wave Science (RPWS) instrument detected a cold, dense and dynamic ionosphere at Saturn that interacts with the rings. Plasma densities reached up to 1000 cm-3 and electron temperatures were below 1160 K near closest approach...
December 11, 2017: Science
https://www.readbyqxmd.com/read/29227371/a-quality-improvement-initiative-reduces-cast-complications-in-a-pediatric-hospital
#15
Julie Balch Samora, Walter P Samora, Kevin Dolan, Kevin E Klingele
BACKGROUND: Casts, while frequently used as routine treatment in pediatric orthopaedic practice, are not without complications. At our large tertiary care pediatric hospital, the baseline rate of all casting complications was 5.6 complications per 1000 casts applied (0.56%). We tested the hypothesis that we could use quality improvement (QI) methodology to decrease the overall cast complication rate and improve patient care. METHODS: We initiated a QI program implementing concepts derived from the Institute for Healthcare Improvement models, including Plan-Do-Study-Act cycles, to decrease our cast complication rate...
December 8, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/29226509/biomimetic-electrospun-coatings-increase-the-in-vivo-sensitivity-of-implantable-glucose-biosensors
#16
Krishna Burugapalli, Shavini Wijesuriya, Ning Wang, Wenhui Song
In vivo tissue responses and functional efficacy of electrospun membranes based on polyurethane (PU) and gelatin (GE) as biomimetic coatings for implantable glucose biosensors was investigated in a rat subcutaneous implantation model. Three electrospun membranes with optimized fibre diameters, pore sizes and permeability, both single PU and co-axial PU-GE fibres and a solvent cast PU film were implanted in rats to evaluate tissue responses. For functional efficacy testing, four sensor variants coated with the above mentioned electrospun membranes as mass-transport limiting and outermost biomimetic coatings were implanted in rats...
December 11, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29226210/data-and-analyses-of-phase-relations-in-the-ce-fe-sb-ternary-system
#17
Daiman Zhu, Chengliang Xu, Changrong Li, Cuiping Guo, Raowen Zheng, Zhenmin Du, Junqin Li
These data and analyses support the research article "Experimental study on phase relations in the Ce-Fe-Sb ternary system" Zhu et al. (2017) [1]. The data and analyses presented here include the experimental results of XRD, SEM and EPMA for the determination of the whole liquidus projection and the isothermal section at 823 K in the Ce-Fe-Sb system. All the results enable the understanding of the constituent phases and the solidification processes of the as-cast alloys as well as the phase relations and the equilibrium regions at 823 K in the Ce-Fe-Sb ternary system over the entire composition...
February 2018: Data in Brief
https://www.readbyqxmd.com/read/29226206/unusual-complete-isolated-scaphoid-dislocation-report-of-a-case
#18
Efstathios G Ballas, Konstantinos Raptis, Ioannis P Stathopoulos, Nikolaos A Stavropoulos, Sarantis-Petros G Spyridonos
Isolated scaphoid dislocations are extremely rare injuries and are commonly associated with significant ligamentous disruptions. A dorsiflexion-supination force upon the hand is considered as the most common mechanism of injury. Different treatment options have been proposed for the management of this uncommon entity, ranging from conservative treatment with closed reduction and casting to a wide range of open or percutaneous surgical techniques. In this article, we reported ona case of this rare injury managed with open reduction and pinning along with ligamentous reconstruction...
September 2017: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/29225964/chosen-vascular-risk-markers-in-pseudoexfoliation-syndrome-an-age-related-disorder
#19
Hanna Lesiewska, Agnieszka Łukaszewska-Smyk, Grażyna Odrowąż-Sypniewska, Magdalena Krintus, Aneta Mańkowska-Cyl, Grażyna Malukiewicz
Purpose: To evaluate lipids and C-reactive protein serum levels in patients with pseudoexfoliation syndrome (PEX) in the Polish population. Methods: 96 patients were studied with PEX and 79 control subjects. Total cholesterol, triglycerides, high-density lipoprotein (HDL)-cholesterol, low-density lipoprotein (LDL)-cholesterol, non-HDL-cholesterol and CRP serum levels, and TG/HDL-C and TC/HDL-C indexes were assessed. Results: There were no significant differences in concentration of lipids and values of TC/HDL-C, TG/HDL-C, and non-HDL-C between PEX and control groups...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/29225211/changes-in-foxo-and-proinflammatory-cytokines-in-the-late-stage-of-immobilized-fast-and-slow-muscle-atrophy
#20
Takeshi Okamoto, Shuichi Machida
The present study aimed to examine the changes in the expression of Forkhead box protein O (FOXO) and proinflammatory cytokines in both slow-twitch soleus and fast-twitch plantaris muscles following cast immobilization. Male C57BL/6 mice were subjected to cast immobilization for 7 and 21 days. Cast immobilization increased FOXO3a mRNA and total protein expression in both the soleus and plantaris muscles. Although FOXO3a phosphorylation tended to increase in response to cast immobilization in both muscles, a significant increase was evident after 21 days of immobilization only in the soleus muscle...
2017: Biomedical Research
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