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PubMed Journals Articles About "Flake Should Have Stood Birtherism" RSS

09:01 EST 12th December 2018 | BioPortfolio

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Showing "Flake Should Have Stood Birtherism" PubMed Articles 1–25 of 72

Study on Flake Formation Behavior and Its Influence Factors in Cr5 Steel.

A flake is a crack that is induced by trapped hydrogen within steel. To study its formation mechanism, previous studies mostly focused on the formation process and magnitude of hydrogen pressure in hydrogen traps such as cavities and cracks. However, according to recent studies, the hydrogen leads to the decline of the mechanical properties of steel, which is known as hydrogen embrittlement, is another reason for flake formation. In addition, the phenomenon of stress induced hydrogen uphill diffusion should...


Modulating Capacitive Response of MoS2 Flake by Controlled Nanostructuring through Focused Laser Irradiation.

Unlike graphene nanostructures, various physical properties of nanostructured MoS2 have remained unexplored due to the lack of established fabrication routes. Herein, we have reported unique electrostatic properties of MoS2 nanostructures, fabricated in a controlled manner of different geometries on 2D flake by using focused laser irradiation technique. Electrostatic force microscopy has been carried out on MoS2 nanostructures by varying tip bias voltage and lift height. The analysis depicts no contrast fli...

A novel green approach for reduction of freestanding graphene oxide: Electrical and electronic structural investigations.

Ion beam irradiation technique has been proposed, for efficient, fast and eco-friendly reduction of graphene oxide (GO), as an alternative to the conventional methods. 5 MeV, Au+ ion beam has been used to reduce the free standing GO flake. Both electronic and nuclear energy loss mechanisms of the irradiation process play a major role in removal of oxygen moieties and recovery of graphene network. Atomic resolution scanning tunnelling microscopy analysis of the irradiated GO flake shows the characteristic ho...


High-efficiency energy transfer in perovskite heterostructures.

Here, we report the energy transfer in (PEA)PbI/MAPbBr perovskite heterostructures. Under two-photon excitation, the photoluminescence (PL) emission of the (PEA)PbI flake is nearly completely quenched, while that of the MAPbBr microplate is greatly increased (6.5 folds higher) in the heterostructure. The opposite variation character of the PL emissions is attributed to the radiative energy transfer from the (PEA)PbI flake to the MAPbBr microplate. The radiative energy transfer occurs on an ultrafast timesca...

Jury Finds in Favor of Nurse Who Sued Brigham and Women's Hospital.

Lawsuit describes retaliation after she stood up for a colleague.

Energetics and Electronic Structure of Triangular Hexagonal Boron Nitride Nanoflakes.

We studied the energetics and electronic structures of hexagonal boron nitrogen (h-BN) nanoflakes with hydrogenated edges and triangular shapes with respect to the edge atom species. Our calculations clarified that the hydrogenated h-BN nanoflakes with a triangular shape prefer the N edges rather than B edges irrespective of the flake size. The electronic structure of hydrogenated h-BN nanoflakes depends on the edge atom species and their flake size. The energy gap between the lowest unoccupied (LU) and the...

A novel flake-ball-like magnetic FeO/γ-MnO meso-porous nano-composite: Adsorption of fluorinion and effect of water chemistry.

A novel flake-ball-like magnetic FeO/γ-MnO meso-porous nano-composite was synthesized and characterized for defluoridation. Adsorption process, characters, and effects of solution chemistry on the adsorption of flourinion in FeO/γ-MnO were evaluated. The results show that the adsorption of fluorinion in the FeO/γ-MnO nano-composite is fitted with the Pseudo-first model and the Langmuir model, indicating that the adsorption process of fluorinion in the FeO/γ-MnO nano-composite was a physical process and ...

Implementing lateral MoSe p-n homo-junction by efficient carrier type modulation.

High performance p-n junctions based on atomically thin two-dimensional (2D) materials are the fundamental building blocks for many nano-scale functional devices that are ideally for future electronic and optoelectronic applications. The lateral p-n homo-junctions outperform vertically stacked ones in terms of conveniently tunable band offset, however, the realization of lateral p-n homo-junctions usually require efficient carrier type modulation in a single 2D material flake, which remains a tech challenge...

Synthesis of FC-supported Fe through a carbothermal process for immobilizing uranium.

The abundant generation of uranium (U), a radioactive nuclide, engenders a severe hazard to the environment. Iron based materials were used to immobilize U from water, however, the immobilization is limited by the agglomeration of nanoparticle Fe. In this study, a novel carbothermal process was proposed to synthesize flour carbon (FC) supported nano-flake Fe (Fe-FC). Scanning electron microscopy (SEM) and nitrogen isotherm adsorption-desorption analysis were conducted to characterize Fe-FC. The immobilizati...

Novel ZnFeO/TiO/flake graphite composite as particle electrodes for efficient photoelectrocatalytic degradation of rhodamine B in water.

A novel ZnFeO/TiO/flake graphite composite material was synthesized and used as particle electrodes in a photoelectrocatalytic (PEC) system to investigate the degradation of rhodamine B as a model dye pollutant in water. Results showed that a PEC process with the new composite evidently led to enhanced degradation of rhodamine B due to a synergistic effect of photocatalysis and electrocatalysis. Operating variables including electrolyte concentration, applied cell voltage, air flow, composite dosage, soluti...

My first experiences of nurse leadership.

Alan Nobbs reflects on his early experiences of nurse leadership, most of which have thankfully not stood the test of time.

Fabrication of two distinct hydroxyapatite coatings and their effects on MC3T3-E1 cell behavior.

How the surface topography of hydroxyapatite (HAP) coatings remodels hard tissue is of utmost importance and a contributing factor to ambiguity regarding this subject. Here, HAP coatings with different topographies of a rod-like nanoarray with c-axis orientation and a flake-like micro-flower array with a(b)-axis orientation on a Ti substrate were synthesized via hydrothermal-electrodeposition by controlling the concentration of electrolytes. XRD, TEM and SAED analyses indicated that the rod-like HAP nanoarr...

Unraveling Spatially Heterogeneous Ultrafast Carrier Dynamics of Single-Layer WSe by Femtosecond Time-Resolved Photoemission Electron Microscopy.

Studies of the ultrafast carrier dynamics of transition metal dichalcogenides have employed spatially-averaged measurements, which obfuscate the rich variety of dynamics that originate from the structural heterogeneity of these materials. Here, we employ femtosecond time-resolved photoemission electron microscopy (TR-PEEM) with sub-80-nm spatial resolution to image the ultrafast sub-picosecond to picosecond carrier dynamics of monolayer tungsten diselenide (WSe). The dynamics observed following 2.41-eV pump...

Role of H transfer in the Gas-Phase Sulfidation Process of MoO: A Quantum Molecular Dynamics Study.

Layered transition metal dichalcogenide (TMDC) materials have received great attention because of their remarkable electronic, optical, and chemical properties. Among typical TMDC family members, monolayer MoS has been considered a next-generation semiconducting material, primarily due to higher carrier mobility and larger band gap. The key enabler to bring such a promising MoS layer into mass production is chemical vapor deposition (CVD). During CVD synthesis, gas-phase sulfidation of MoO is a key elementa...

Simpson grading as predictor of meningioma recurrence.

Meningimas are one of the commonest primary brain tumours and the commonest extra-axial primary brain tumour. Despite better understanding of the molecular pathogenesis of the tumours, surgical excision remains the treatment of choice, and in a large proportion of cases, complete excision is curative. Simpson grading for the extent of resection of meningiomas, was introduced more than six decades ago, and has stood the test of time. With modern technological advancements, however, the relevance of Simpson g...

Acheulean without handaxes? Assemblage variability at FLK West (Lowermost Bed II, Olduvai, Tanzania).

The FLK West sequence is divided into six fluvial stratigraphic levels, each of which provided archaeological materials. In the present paper we outline the major similarities and differences displayed by the lithic assemblages in FLK W, particularly the lower assemblages, which have yielded more objects than the upper ones. The differences noted in the absence-presence and frequency of LCTs may be explained in occupational terms, while the similarities in raw material selection, core reduction and flake re...

Exploring (bio)catalytic activities of structurally characterised Cu(ii) and Mn(iii) complexes: histidine recognition and photocatalytic application of Cu(ii) complex and derived CuO nano-cubes.

Structurally characterised two polymeric complexes of Cu(ii) (3) and Mn(iii) (4) of the ligand L (2-(((2-(phenylamino)ethyl)imino)methyl)phenol) have been explored for catecholase-like activity, fluorescence recognition of histidine and catalytic activity towards coupling of aryl iodides with benzamide, leading to N-arylbenzamides. CuO nano-cubes (NCs) prepared by thermal decomposition of the Cu(ii) complex function as photocatalysts for the degradation of methylene blue. Cube-like morphology of CuO nanocry...

Surfactant-free exfoliation of multilayer molybdenum disulfide nanosheets in water.

In this study, we report a potentially scalable method for producing multilayer molybdenum disulfide (MoS) nanosheets. The addition of a small amount of ammonia solution can improve the exfoliation of MoS nanosheets in water. The surface charge induced by spontaneous adsorption of hydroxyl ions on MoS surfaces favors the exfoliation process. The edge charge generated by the ionization of edge-attached groups facilities the dispersion of exfoliated nanosheets in water. It is also found that smaller MoS nanos...

Quantum Holography in a Graphene Flake with an Irregular Boundary.

Electrons in clean macroscopic samples of graphene exhibit an astonishing variety of quantum phases when strong perpendicular magnetic field is applied. These include integer and fractional quantum Hall states as well as symmetry broken phases and quantum Hall ferromagnetism. Here we show that mesoscopic graphene flakes in the regime of strong disorder and magnetic field can exhibit another remarkable quantum phase described by holographic duality to an extremal black hole in two-dimensional anti-de Sitter ...

Tuning magnetic soliton phase via dimensional confinement in exfoliated 2D Cr1/3NbS2 thin flakes.

Thin flakes of Cr1/3NbS2 are fabricated successfully via microexfoliation techniques. Temperature-dependent and field-dependent magnetizations of thin flakes with various thicknesses are investigated. When the thickness of the flake is around several hundred nanometers, the softening and eventual disappearance of the bulk soliton peak is accompanied by the appearance of other magnetic peaks at lower magnetic fields. The emergence and annihilation of the soliton peaks are explained and simulated theoreticall...

Virulence of Trypanosoma cruzi from vector and reservoir in in natura açaí pulp resulting in food-borne acute Chagas disease at Pará State, Brazil.

In recent decades some outbreaks of food-borne acute Chagas disease (ACD) in humans were identified by clinical and epidemiological characterization after association through the ingestion of açaí pulp probably contaminated with Trypanosoma cruzi. Whereas Belém and Abaetetuba stood out as important risk regions for disease transmission, the importance of Rhodnius pictipes, and Philander opossum for the biological cycle of T. cruzi, and data from agribusiness market of açaí, to study T. cruzi from vecto...

Black phosphorus: Degradation favors lubrication.

Due to its innate instability, the degradation of black phosphorus (BP) with oxygen and moisture was considered as the obstacle for its application in ambient conditions. Here, reduced friction force by about 50% at the degraded area of BP nanosheets was expressly observed using atomic force microscopy due to the produced phosphorus oxides during degradation. EDS mapping analyses corroborated the localized concentration of oxygen on the degraded BP flake surface where friction reduction was observed. Water ...

Coupling single photons from discrete quantum emitters in WSe to lithographically defined plasmonic slot-waveguides.

We report the observation of the generation and routing of single plasmons generated by localized excitons in a WSe monolayer flake exfoliated onto lithographically defined Au-plasmonic waveguides. Statistical analysis of the position of different quantum emitters shows that they are (3.3±0.7) times more likely to form close to the edges of the plasmonic waveguides. By characterizing individual emitters we confirm their single-photon character via the observation of antibunching in the signal (g(0) = 0.42)...

From One to Two: Can Visual Feedback Improve the Light Touch Effects on Postural Sway?

The postural control is improved by implicit somatosensory information from lightly touching a rigid bar or explicit visual information about the postural sway. Whether these two additional sources provided at the same time further reduce the postural sway is still unknown. Participants stood on a force plate as quiet as possible lightly touching the bar while received or not visual feedback of the center of pressure position on a monitor screen. Postural sway reduced similarly with the light touch regardle...

Men are from Mars: The challenges of communicating as a male nursing student.

Male-female communication within nursing is often fraught with difficulties especially for male nurses as the try and assimilate themselves into a female dominated profession. It is clear that men and women possess different communication styles. Men tend to be forthright and to the point. Women on the other hand often view the world as a network of connections, as a negotiation for closeness and support and therefore centred on maintaining solidarity. The aim of this study was to explore the lived-experien...


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