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https://www.readbyqxmd.com/read/27910646/a-streaked-x-ray-spectroscopy-platform-for-rapidly-heated-near-solid-density-plasmas
#1
C R Stillman, P M Nilson, S T Ivancic, C Mileham, I A Begishev, R K Junquist, D J Nelson, D H Froula
A picosecond, time-resolved, x-ray spectroscopy platform was developed to study the thermal line emission from rapidly heated solid targets containing buried aluminum or iron layers. The targets were driven by high-contrast 1ω or 2ω laser pulses at focused intensities up to 1 × 10(19) W/cm(2). The experimental platform combines time-integrating and time-resolved x-ray spectrometers. Picosecond time resolution was achieved with a pair of ultrafast x-ray streak cameras coupled to high-throughput Hall spectrometers...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27900382/ultra-fast-preparation-of-high-performance-thermoelectric-bulk-tinisb0-05sn0-95-by-microwave-synthesis
#2
Y Li, C Cheng, Y Lei, M Wang, R D Wan
The antimony-doped half-Heusler thermoelectric bulk TiNiSb0.05Sn0.95 was prepared via ultra-fast 4.5 min microwave synthesis, cold-press forming and 20 min microwave pressureless sintering. The electrical properties i.e. the Seebeck coefficient (S), electrical resistivity (ρ), and carrier concentration (n) and mobility (μ) were measured on a Seebeck coefficient/resistance analysis system (S/RAs) and Hall effect measurement system (HEMS), respectively. The thermal conductivity (κ) was measured on a laser flash thermal analyzer (LFA)...
November 30, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27886473/lifshitz-transitions-in-the-ferromagnetic-superconductor-ucoge
#3
Gaël Bastien, Adrien Gourgout, Dai Aoki, Alexandre Pourret, Ilya Sheikin, Gabriel Seyfarth, Jacques Flouquet, Georg Knebel
We present high field magnetoresistance, Hall effect and thermopower measurements in the Ising-type ferromagnetic superconductor UCoGe. A magnetic field is applied along the easy magnetization c axis of the orthorhombic crystal. In the different experimental probes, we observed five successive anomalies at H≈4, 9, 12, 16, and 21 T. Magnetic quantum oscillations were detected both in resistivity and thermoelectric power. At most of the anomalies, significant changes of the oscillation frequencies and the effective masses have been observed, indicating successive Fermi surface instabilities induced by the strong magnetic polarization under a magnetic field...
November 11, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27885714/high-performance-thz-emitters-based-on-ferromagnetic-nonmagnetic-heterostructures
#4
Yang Wu, Mehrdad Elyasi, Xuepeng Qiu, Mengji Chen, Yang Liu, Lin Ke, Hyunsoo Yang
A low-cost, intense, broadband, noise resistive, magnetic field controllable, flexible and low power driven THz emitter based on thin nonmagnetic/ferromagnetic metallic heterostructures is demonstrated. The THz emission origins from the inverse spin Hall Effect. The proposed devices are not only promising for a wide range THz equipment, but also offering an alternative approach to characterize spin-orbit interaction in nonmagnetic/ferromagnetic bilayers.
November 25, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27878537/a-synthesis-of-convergent-reflections-tensions-and-silences-in-linking-gender-and-global-environmental-change-research
#5
EDITORIAL
Irene Iniesta-Arandia, Federica Ravera, Stephanie Buechler, Isabel Díaz-Reviriego, María E Fernández-Giménez, Maureen G Reed, Mary Thompson-Hall, Hailey Wilmer, Lemlem Aregu, Philippa Cohen, Houria Djoudi, Sarah Lawless, Berta Martín-López, Thomas Smucker, Grace B Villamor, Elizabeth Edna Wangui
This synthesis article joins the authors of the special issue "Gender perspectives in resilience, vulnerability and adaptation to global environmental change" in a common reflective dialogue about the main contributions of their papers. In sum, here we reflect on links between gender and feminist approaches to research in adaptation and resilience in global environmental change (GEC). The main theoretical contributions of this special issue are threefold: emphasizing the relevance of power relations in feminist political ecology, bringing the livelihood and intersectionality approaches into GEC, and linking resilience theories and critical feminist research...
December 2016: Ambio
https://www.readbyqxmd.com/read/27862743/tuning-of-silver-catalyst-mesostructure-promotes-selective-carbon-dioxide-conversion-into-fuels
#6
Youngmin Yoon, Anthony Shoji Hall, Yogesh Surendranath
An electrode's performance for catalytic CO2 conversion to fuels is a complex convolution of surface structure and transport effects. Using well-defined mesostructured silver inverse opal (Ag-IO) electrodes, it is demonstrated that mesostructure-induced transport limitations alone serve to increase the turnover frequency for CO2 activation per unit area, while simultaneously improving reaction selectivity. The specific activity for catalyzed CO evolution systematically rises by three-fold and the specific activity for catalyzed H2 evolution systematically declines by ten-fold with increasing mesostructural roughness of Ag-IOs...
November 10, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27852205/generalized-molecular-descriptors-derived-from-event-based-discrete-derivative
#7
Oscar Martínez-Santiago, Reisel Millán Cabrera, Yovani Marrero-Ponce, Stephen J Barigye, Huong Le-Thi-Thu, F Javier Torres, Cesar H Zambrano, Ivan Yaber-Goenaga, Maykel Cruz-Monteagudo, Yoan Martínez López, Facundo Pérez Giménez, Francisco Torrens
In the present study, a generalized approach for molecular structure characterization is introduced, based on the relation frequency matrix (F) representation of the molecular graph and the subsequent calculation of the corresponding discrete derivative (finite difference) over a pair of elements (atoms). In earlier publications (22- 24), an unique event, named connected subgraphs, (based on the Kier-Hall's subgraphs) was systematically employed for the computation of the matrix F. The present report is a generalization of this notion, in which eleven additional events are introduced, classified in three categories, namely, topological (terminal paths, vertex path incidence, quantum subgraphs, walks of length k, Sach's subgraphs), fingerprints (MACCs, E-state and substructure fingerprints) and atomic contributions (Ghose and Crippen atom-types for hydrophobicity and refractivity) for F generation...
2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27826861/a-substrate-trapping-method-for-identification-of-direct-cdc14-phosphatase-targets
#8
Brendan L Powers, Hana Hall, Harry Charbonneau, Mark C Hall
Mitotic exit requires the inactivation of cyclin-dependent kinase (Cdk) activity and reversal of Cdk-mediated phosphorylation events by protein phosphatases. In Saccharomyces cerevisiae the mitotic exit network (MEN) leads to activation and dispersal of the Cdc14 phosphatase throughout the cell following successful chromosome segregation. MEN-released Cdc14 is required for both full Cdk inactivation and dephosphorylation of Cdk substrates. While Cdc14 originally was thought to act broadly on mitotic Cdk substrates, recent biochemical studies revealed that Cdc14 possesses a strong preference for a subset of Cdk phosphorylation sites...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27819366/screening-limited-switching-performance-of-multilayer-2d-semiconductor-fets-the-case-for-sns
#9
Sukrit Sucharitakul, U Rajesh Kumar, Raman Sankar, Fang-Cheng Chou, Yit-Tsong Chen, Chuhan Wang, Cai He, Rui He, Xuan P A Gao
Gate tunable p-type multilayer tin mono-sulfide (SnS) field-effect transistor (FET) devices with SnS thickness between 50 and 100 nm were fabricated and studied to understand their performance. The devices showed anisotropic inplane conductance and room temperature field effect mobilities ∼5-10 cm(2) V(-1) s(-1). However, the devices showed an ON-OFF ratio ∼10 at room temperature due to appreciable OFF state conductance. The weak gate tuning behavior and finite OFF state conductance in the depletion regime of SnS devices are explained by the finite carrier screening length effect which causes the existence of a conductive surface layer from defect induced holes in SnS...
December 7, 2016: Nanoscale
https://www.readbyqxmd.com/read/27790987/evidence-from-mixed-hydrate-nucleation-for-a-funnel-model-of-crystallization
#10
Kyle Wm Hall, Sheelagh Carpendale, Peter G Kusalik
The molecular-level details of crystallization remain unclear for many systems. Previous work has speculated on the phenomenological similarities between molecular crystallization and protein folding. Here we demonstrate that molecular crystallization can involve funnel-shaped potential energy landscapes through a detailed analysis of mixed gas hydrate nucleation, a prototypical multicomponent crystallization process. Through this, we contribute both: (i) a powerful conceptual framework for exploring and rationalizing molecular crystallization, and (ii) an explanation of phenomenological similarities between protein folding and crystallization...
October 25, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27786261/spin-hall-nano-oscillator-with-oblique-magnetization-and-dzyaloshinskii-moriya-interaction-as-generator-of-skyrmions-and-nonreciprocal-spin-waves
#11
A Giordano, R Verba, R Zivieri, A Laudani, V Puliafito, G Gubbiotti, R Tomasello, G Siracusano, B Azzerboni, M Carpentieri, A Slavin, G Finocchio
Spin-Hall oscillators (SHO) are promising sources of spin-wave signals for magnonics applications, and can serve as building blocks for magnonic logic in ultralow power computation devices. Thin magnetic layers used as "free" layers in SHO are in contact with heavy metals having large spin-orbital interaction, and, therefore, could be subject to the spin-Hall effect (SHE) and the interfacial Dzyaloshinskii-Moriya interaction (i-DMI), which may lead to the nonreciprocity of the excited spin waves and other unusual effects...
October 27, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27777061/an-exploratory-clinical-trial-to-evaluate-the-efficacy-of-an-experimental-dentifrice-formulation-in-the-relief-of-dentine-hypersensitivity
#12
C Parkinson, P Constantin, C Goyal, C Hall
OBJECTIVES: This study aimed to investigate whether addition of an octadecene/maleic anhydride copolymer (O/MA) to a potassium nitrate (KNO3) dentifrice could facilitate delivery of potassium to dentine and enhance its efficacy in dentine hypersensitivity relief. METHODS: This was a randomised, examiner-blind, controlled, parallel group study in 139 healthy subjects with at ≥2 sensitive teeth. Assessment of dentine hypersensitivity to tactile (Yeaple probe) and evaporative (air) stimuli (Schiff Sensitivity Scale, visual analogue scale [VAS]) was carried out at baseline and after 1, 2, 4 and 8 weeks twice daily treatment with an experimental 5% KNO3/3% O/MA dentifrice, a comparator 5% KNO3 dentifrice (active comparator), a 0% KNO3/3% O/MA dentifrice (placebo) and a regular fluoride dentifrice (negative control)...
October 21, 2016: Journal of Dentistry
https://www.readbyqxmd.com/read/27774844/the-estimated-verbal-gcs-subscore-in-intubated-traumatic-brain-injury-patients-is-it-really-better
#13
Katarina Cheng, Ribal Bassil, Raphael Carandang, Wiley Hall, Susanne Muehlschlegel
The Glasgow Coma Scale (GCS) has limited utility in intubated patients due to the inability to assign verbal subscores. The verbal subscore can be derived from the eye and motor subscores using a mathematical model, but the advantage of this method and its use in outcome prognostication in traumatic brain injury (TBI) patients remains unknown. We compared the validated "Core+CT"-IMPACT-model performance in 251 intubated TBI patients prospectively enrolled in the longitudinal OPTIMISM study between November 2009 and May 2015 when substituting the original motor GCS (mGCS) with the total estimated GCS (teGCS; with estimated verbal subscore)...
December 2, 2016: Journal of Neurotrauma
https://www.readbyqxmd.com/read/27770636/two-novel-loci-cobl-and-slc10a2-for-alzheimer-s-disease-in-african-americans
#14
Jesse Mez, Jaeyoon Chung, Gyungah Jun, Joshua Kriegel, Alexandra P Bourlas, Richard Sherva, Mark W Logue, Lisa L Barnes, David A Bennett, Joseph D Buxbaum, Goldie S Byrd, Paul K Crane, Nilüfer Ertekin-Taner, Denis Evans, M Daniele Fallin, Tatiana Foroud, Alison Goate, Neill R Graff-Radford, Kathleen S Hall, M Ilyas Kamboh, Walter A Kukull, Eric B Larson, Jennifer J Manly, Jonathan L Haines, Richard Mayeux, Margaret A Pericak-Vance, Gerard D Schellenberg, Kathryn L Lunetta, Lindsay A Farrer
INTRODUCTION: African Americans' (AAs) late-onset Alzheimer's disease (LOAD) genetic risk profile is incompletely understood. Including clinical covariates in genetic analyses using informed conditioning might improve study power. METHODS: We conducted a genome-wide association study (GWAS) in AAs employing informed conditioning in 1825 LOAD cases and 3784 cognitively normal controls. We derived a posterior liability conditioned on age, sex, diabetes status, current smoking status, educational attainment, and affection status, with parameters informed by external prevalence information...
October 20, 2016: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
https://www.readbyqxmd.com/read/27753496/multicomponent-hetero-4-2-cycloaddition-allylboration-reaction-from-natural-product-synthesis-to-drug-discovery
#15
Dennis G Hall, Taras Rybak, Tristan Verdelet
Multicomponent reactions (MCR), transformations employing three or more simple substrates in a single and highly atom-economical operation, are very attractive in both natural product synthesis and diversity-oriented synthesis of druglike molecules. Several popular multicomponent reactions were designed by combining two well-established individual reactions that utilize mutually compatible substrates. In this regard, it is not surprising that the merging of two reactions deemed as workhorses of stereoselective synthesis, the Diels-Alder cycloaddition and carbonyl allylboration, would produce a powerful and highly versatile tandem MCR process...
October 18, 2016: Accounts of Chemical Research
https://www.readbyqxmd.com/read/27725788/an-efficient-power-harvesting-mobile-phone-based-electrochemical-biosensor-for-point-of-care-health-monitoring
#16
Alexander C Sun, Chengyang Yao, A G Venkatesh, Drew A Hall
Cellular phone penetration has grown continually over the past two decades with the number of connected devices rapidly approaching the total world population. Leveraging the worldwide ubiquity and connectivity of these devices, we developed a mobile phone-based electrochemical biosensor platform for point-of-care (POC) diagnostics and wellness tracking. The platform consists of an inexpensive electronic module (< $20) containing a low-power potentiostat that interfaces with and efficiently harvests power from a wide variety of phones through the audio jack...
November 1, 2016: Sensors and Actuators. B, Chemical
https://www.readbyqxmd.com/read/27681799/prevention-of-nosocomial-infections-in-critically-ill-patients-with-lactoferrin-prevail-study-study-protocol-for-a-randomized-controlled-trial
#17
John Muscedere, David Maslove, John Gordon Boyd, Nicole O'Callaghan, Francois Lamontagne, Steven Reynolds, Martin Albert, Rick Hall, Danielle McGolrick, Xuran Jiang, Andrew G Day
BACKGROUND: Nosocomial infections remain an important source of morbidity, mortality, and increased health care costs in hospitalized patients. This is particularly problematic in intensive care units (ICUs) because of increased patient vulnerability due to the underlying severity of illness and increased susceptibility from utilization of invasive therapeutic and monitoring devices. Lactoferrin (LF) and the products of its breakdown have multiple biological effects, which make its utilization of interest for the prevention of nosocomial infections in the critically ill...
September 29, 2016: Trials
https://www.readbyqxmd.com/read/27647489/plasma-transfusions-prior-to-insertion-of-central-lines-for-people-with-abnormal-coagulation
#18
David P Hall, Lise J Estcourt, Carolyn Doree, Sally Hopewell, Marialena Trivella, Timothy S Walsh
BACKGROUND: The insertion of central venous catheters (CVCs) may be associated with peri- and post-procedural bleeding. People who require a central line often have disorders of coagulation as a result of their underlying illness, co-morbidities or the effects of treatment. Clinical practice in some institutions is to mitigate the risk of bleeding in these patients by prophylactically transfusing fresh frozen plasma (FFP) in order to correct clotting factor deficiencies prior to central line insertion...
September 20, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27637878/generation-of-a-stable-plasmid-for-in-vitro-and-in-vivo-studies-of-staphylococcus
#19
Christina N Krute, Kelsey L Krausz, Mary A Markiewicz, Jason A Joyner, Srijana Pokhrel, Pamela R Hall, Jeffrey L Bose
A major short-coming to plasmid-based genetic tools is the necessity of using antibiotics to ensure plasmid maintenance. While selectable markers are very powerful, this practice is not always practical, such as during in vivo models of bacterial infection. During previous studies, it was noted that the uncharacterized LAC-p01 plasmid in Staphylococcus aureus USA300 isolates was stable in the absence of a known selection, and therefore could serve as a platform for new genetic tools for Staphylococcus species...
September 16, 2016: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/27599463/an-itraq-characterisation-of-the-role-of-tolc-during-electron-transfer-from-shewanella-oneidensis-mr-1
#20
Gregory J S Fowler, Ana G Pereira-Medrano, Stephen Jaffe, Grzegorz Pasternak, Trong Khoa Pham, Pablo Ledezma, Simon T E Hall, Ioannis A Ieropoulos, Phillip C Wright
Anodophilic bacteria have the ability to generate electricity in microbial fuel cells (MFCs) by extracellular electron transfer to the anode. We investigated the anode-specific responses of Shewanella oneidensis MR-1, an exoelectroactive Gammaproteobacterium, using for the first time iTRAQ and 2D-LC MS/MS driven membrane proteomics to compare protein abundances in S. oneidensis when generating power in MFCs, and growing in a continuous culture. The regulated dataset produced was enriched in membrane proteins...
September 7, 2016: Proteomics
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