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E Saralidze, L Khuchua, I Kobaidze
The interaction between different brain structures could be crucial to predicting seizure occurrence, threshold and spread. Moreover, the sleep-wake cycle and electrical activity of brain structures in different phases of sleep could significantly affect the pattern and extent of seizure spread, and therefore the characteristics of epileptic activity. In this animal model using 15 Wistar rats, we show that the duration of hippocampal seizures, induced by electrical stimulation of the hippocampus, is significantly increased during slow sleep...
September 2016: Georgian Medical News
Parker Magin, Rebecca Stewart, Allison Turnock, Amanda Tapley, Elizabeth Holliday, Nick Cooling
Underperforming trainees requiring remediation may threaten patient safety and are challenging for vocational training programs. Decisions to institute remediation are high-stakes-remediation being resource-intensive and emotionally demanding on trainees. Detection of underperformance requiring remediation is particularly problematic in general (family) practice. We sought to establish early-training assessment instruments predictive of general practice (GP) trainees' subsequently requiring formal remediation...
October 21, 2016: Advances in Health Sciences Education: Theory and Practice
Roy M John, Sunil Kapur, Kenneth A Ellenbogen, Jayanthi N Koneru
BACKGROUND: Collateral damage has been reported with the use of the cryoballon for pulmonary vein isolation. OBJECTIVES: To determine the incidence and characteristics associated with atrioesophageal fistula (AEF) following the use of cryoballoon. METHODS: Cases of AEF reported with the cryoballoon since 2011 were collected from the MAUDE database, publications and the manufacturer's database. Lowest balloon temperatures were compared with matched control patients undergoing cryoballoon ablation without AEF formation...
October 18, 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
K P Wolffenbuttel, R Hersmus, H Stoop, K Biermann, P Hoebeke, M Cools, L H J Looijenga
Recent studies on gonadal histology have improved the understanding of germ cell malignancy risk in patients with disorders of sex development (DSD), and evidence-based gonadal management strategies are gradually emerging. Especially in 46,XY DSD and 45,X/46,XY DSD, which are characterized by gonadal dysgenesis, the risk of germ cell malignancy is significantly increased. This paper summarized the progress over the past 10 years in malignancy risk assessment in patients with DSD, and its implications for optimal surgical handling of the involved gonads...
October 8, 2016: Journal of Pediatric Urology
Camilo A F Salvador, Mariana R Dal Bó, Fernando H Costa, Marcia O Taipina, Eder S N Lopes, Rubens Caram
In this study, we explored the Ti-Nb-Fe system to find an optimal cost-effective composition with the lowest elastic modulus and the lowest added Nb content. Six Ti-(31-4x)Nb-(1+0.5x)Fe ingots were prepared and Nb was substituted with Fe, starting at Ti-31Nb-1.0Fe and going up to Ti-11Nb-3.5Fe (wt%). The ingots were subjected to cold rolling, recrystallization and solution treatment, followed by water-quenching (WQ), furnace cooling (FC) or step-quenching to 350°C, which caused massive formation of isothermal ω phase...
September 19, 2016: Journal of the Mechanical Behavior of Biomedical Materials
Shuchi K Talati, Haibo Zhai, G Page Kyle, M Granger Morgan, Pralit Patel, Lu Liu
This research assesses climate, technological, and policy impacts on consumptive water use from electricity generation in the Southwest over a planning horizon of nearly a century. We employed an integrated modeling framework taking into account feedbacks between climate change, air temperature and humidity, and consequent power plant water requirements. These direct impacts of climate change on water consumption by 2095 differ with technology improvements, cooling systems, and policy constraints, ranging from a 3%-7% increase over scenarios that do not incorporate ambient air impacts...
October 21, 2016: Environmental Science & Technology
Michael P Grubb, Philip M Coulter, Hugo J B Marroux, Balazs Hornung, Ryan S McMullen, Andrew J Orr-Ewing, Michael N R Ashfold
Spectroscopically observing the translational and rotational motion of solute molecules in liquid solutions is typically impeded by their interactions with the solvent, which conceal spectral detail through linewidth broadening. Here we show that unique insights into solute dynamics can be made with perfluorinated solvents, which interact weakly with solutes and provide a simplified liquid environment that helps to bridge the gap in our understanding of gas- and liquid-phase dynamics. Specifically, we show that in such solvents, the translational and rotational cooling of an energetic CN radical can be observed directly using ultrafast transient absorption spectroscopy...
November 2016: Nature Chemistry
Xiaoting Liu, Dandan Shi, Shimin Shan, Peiyuan Yan, Haifeng Xu, Bing Yan
High-level ab initio calculations on the ground and the excited states of aluminum monobromide (AlBr) have been carried out by utilizing the internally contracted multi-reference configuration interaction method plus Davidson correction (icMRCI+Q) method. The core-valence correlation (CV) correction and spin-orbit coupling (SOC) effect have been investigated in the calculations. The potential energy curves (PECs) of the 13 Λ-S states, as well as those of the 24 Ω states generated from the Λ-S states under the SOC effect, have been obtained...
October 21, 2016: Journal of Physical Chemistry. A
Tom Hillary, Koen Huysentruyt, Arlette De Coninck, Jan Gutermuth, Linda De Raeve, Filip Cools
No abstract text is available yet for this article.
October 2016: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
Tom Hillary, Koen Huysentruyt, Arlette De Coninck, Jan Gutermuth, Linda De Raeve, Filip Cools
No abstract text is available yet for this article.
October 2016: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
P S Whitfield, N Herron, W E Guise, K Page, Y Q Cheng, I Milas, M K Crawford
We have examined the crystal structures and structural phase transitions of the deuterated, partially deuterated and hydrogenous organic-inorganic hybrid perovskite methyl ammonium lead iodide (MAPbI3) using time-of-flight neutron and synchrotron X-ray powder diffraction. Near 330 K the high temperature cubic phases transformed to a body-centered tetragonal phase. The variation of the order parameter Q for this transition scaled with temperature T as Q ∼ (Tc-T)(β), where Tc is the critical temperature and the exponent β was close to ¼, as predicted for a tricritical phase transition...
October 21, 2016: Scientific Reports
Francesca Bomboi, Flavio Romano, Manuela Leo, Javier Fernandez-Castanon, Roberto Cerbino, Tommaso Bellini, Federico Bordi, Patrizia Filetici, Francesco Sciortino
DNA is acquiring a primary role in material development, self-assembling by design into complex supramolecular aggregates, the building block of a new-materials world. Using DNA nanoconstructs to translate sophisticated theoretical intuitions into experimental realizations by closely matching idealized models of colloidal particles is a much less explored avenue. Here we experimentally show that an appropriate selection of competing interactions enciphered in multiple DNA sequences results into the successful design of a one-pot DNA hydrogel that melts both on heating and on cooling...
October 21, 2016: Nature Communications
Aram Hong, Heeseon Jang, Changseop Jeong, Myoung Choul Choi, Jiyoung Heo, Nam Joon Kim
We obtained resonant two-photon ionization circular dichroism (R2PICD) spectra of jet-cooled phenylalanine (Phe) and its hydrated clusters (Phe(H2O)n, n=1-2) near the origin band of the S0-S1 transition. The R2PICD spectra of Phe exhibit well-resolved CD bands of six different conformers present in the jet, which vary in sign and magnitude depending on their conformations. We revised the previous structural assignments of the Phe conformers based on the comparison between the experimental and theoretical CD signs, infrared spectra, and rotational band contours...
October 21, 2016: Journal of Physical Chemistry Letters
Brian G Alberding, Adam J Biacchi, Angela R Hight Walker, Edwin J Heilweil
Tin(II) monosulfide (SnS) is a semiconductor material with an intermediate band gap, high absorption coefficient in the visible range, and earth abundant, non-toxic constituent elements. For these reasons, SnS has generated much interest for incorporation into optoelectronic devices, but little is known concerning the charge carrier dynamics, especially as measured by optical techniques. Here, as opposed to prior studies of vapor deposited films, phase-pure colloidal SnS was synthesized by solution chemistry in three size regimes, ranging from nanometer- to micron-scale (SnS small nanoparticles, SnS medium 2D nanosheets, and SnS large 2D μm-sheets), and evaluated by time-resolved terahertz spectroscopy (TRTS); an optical, non-contact probe of the photoconductivity...
July 21, 2016: Journal of Physical Chemistry. C, Nanomaterials and Interfaces
Yoshiaki Tsuda, Vladimir Semerikov, Federico Sebastiani, Giovanni Giuseppe Vendramin, Martin Lascoux
Boreal and cool temperate forests are the major land cover of northern Eurasia and information about continental-scale genetic structure and past demographic history of forest species is important from an evolutionary perspective and has conservation implications. However, although many population genetics studies of forest tree species have been conducted in Europe or Eastern Asia, continental-scale genetic structure and past demographic history remain poorly known. Here, we focus on the birch genus Betula, which is commonly distributed in boreal and cool temperate forests, and examine 129 populations of 2 tetraploid and 4 diploid species collected from Iceland to Japan...
October 20, 2016: Molecular Ecology
R Galceran, I Fina, J Cisneros-Fernández, B Bozzo, C Frontera, L López-Mir, H Deniz, K-W Park, B-G Park, Ll Balcells, X Martí, T Jungwirth, B Martínez
Antiferromagnetic spintronics is an emerging field; antiferromagnets can improve the functionalities of ferromagnets with higher response times, and having the information shielded against external magnetic field. Moreover, a large list of aniferromagnetic semiconductors and metals with Néel temperatures above room temperature exists. In the present manuscript, we persevere in the quest for the limits of how large can anisotropic magnetoresistance be in antiferromagnetic materials with very large spin-orbit coupling...
October 20, 2016: Scientific Reports
P H Kim, B D Hauer, C Doolin, F Souris, J P Davis
Reducing the moment of inertia improves the sensitivity of a mechanically based torque sensor, the parallel of reducing the mass of a force sensor, yet the correspondingly small displacements can be difficult to measure. To resolve this, we incorporate cavity optomechanics, which involves co-localizing an optical and mechanical resonance. With the resulting enhanced readout, cavity-optomechanical torque sensors are now limited only by thermal noise. Further progress requires thermalizing such sensors to low temperatures, where sensitivity limitations are instead imposed by quantum noise...
October 20, 2016: Nature Communications
Daniel R Reid, Ivan Lyubimov, M D Ediger, Juan J de Pablo
Glass films prepared by a process of physical vapour deposition have been shown to have thermodynamic and kinetic stability comparable to those of ordinary glasses aged for thousands of years. A central question in the study of vapour-deposited glasses, particularly in light of new knowledge regarding anisotropy in these materials, is whether the ultra-stable glassy films formed by vapour deposition are ever equivalent to those obtained by liquid cooling. Here we present a computational study of vapour deposition for a two-dimensional glass forming liquid using a methodology, which closely mimics experiment...
October 20, 2016: Nature Communications
Changliang Shao, Jiquan Chen, Linghao Li, Gang Dong, Juanjuan Han, Michael Abraha, Ranjeet John
Quantifying the surface energy fluxes of grazed and ungrazed steppes is essential to understand the roles of grasslands in local and global climate and in land use change. We used paired eddy-covariance towers to investigate the effects of grazing on energy balance (EB) components: net radiation (Rn ), latent heat (LE), sensible heat (H), and soil heat (G) fluxes on adjacent grazed and ungrazed areas in a desert steppe of the Mongolian Plateau for a two-year period (2010-2012). Near 95% of Rn was partitioned as LE and H, whereas the contributions of G and other components of the EB were 5% at an annual scale...
October 20, 2016: Ecological Applications: a Publication of the Ecological Society of America
N C Knox, K A Weedmark, J Conly, A W Ensminger, F S Hosein, S J Drews
An outbreak of Legionnaires' disease occurred in an inner city district in Calgary, Canada. This outbreak spanned a 3-week period in November-December 2012, and a total of eight cases were identified. Four of these cases were critically ill requiring intensive care admission but there was no associated mortality. All cases tested positive for Legionella pneumophila serogroup 1 (LP1) by urinary antigen testing. Five of the eight patients were culture positive for LP1 from respiratory specimens. These isolates were further identified as Knoxville monoclonal subtype and sequence subtype ST222...
October 20, 2016: Epidemiology and Infection
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