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

08:43 EDT 19th September 2018 | BioPortfolio

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Showing "Flake Should Have Stood Birtherism" PubMed Articles 1–25 of 82

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...

Ultrahigh Conductive Copper/Large Flake Size Graphene Heterostructure Thin-Film with Remarkable Electromagnetic Interference Shielding Effectiveness.

To guarantee the normal operation of next generation portable electronics and wearable devices, together with avoiding electromagnetic wave pollution, it is urgent to find a material possessing flexibility, ultrahigh conductive, and superb electromagnetic interference shielding effectiveness (EMI SE) simultaneously. In this work, inspired by a building bricks toy with the interlock system, we design and fabricate a copper/large flake size graphene (Cu/LG) composite thin film (≈8.8 μm) in the light of hig...


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.

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...

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...

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.

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...

Intrinsic ankle stiffness during standing increases with ankle torque and passive stretch of the Achilles tendon.

Individuals may stand with a range of ankle angles. Furthermore, shoes or floor surfaces may elevate or depress their heels. Here we ask how these situations impact ankle stiffness and balance. We performed two studies (each with 10 participants) in which the triceps surae, Achilles tendon and aponeurosis were stretched either passively, by rotating the support surface, or actively by leaning forward. Participants stood freely on footplates which could rotate around the ankle joint axis. Brief, small stiffn...

CIM Journal Club: Gene therapy for spinal muscular atrophy Comment on Mendell et al. N Engl J Med 2017;377:1713-22.

In their landmark paper, Mendell et al. show that infants with spinal muscular atrophy (SMA) reached important motor milestones and survived longer when treated with AVXS-101 (AveXis), a viral vector containing DNA encoding the survival of motor neuron protein (SMN). Patients not only crawled, stood and walked independently, but learned to speak. These results are very encouraging for patients with SMA and offer hope for pediatric and adult patients with other types of motor neuron diseases.

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...

Real-time imaging of adatom-promoted graphene growth on nickel.

Single adatoms are expected to participate in many processes occurring at solid surfaces, such as the growth of graphene on metals. We demonstrate, both experimentally and theoretically, the catalytic role played by single metal adatoms during the technologically relevant process of graphene growth on nickel (Ni). The catalytic action of individual Ni atoms at the edges of a growing graphene flake was directly captured by scanning tunneling microscopy imaging at the millisecond time scale, while force field...

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...

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)...

Metal-Organic Frameworks for High Charge-Discharge Rate in Lithium-Sulfur Battery.

We report a new method to promote the conductivities of metal-organic frameworks (MOFs) by 5 to 7 magnitudes, thus their potential in electrochemical applications can be fully revealed. This method combines the polarity and porosity advantages of MOFs with the conductive feature of conductive polymer, here, polypyrrole (ppy), to construct ppy-MOF compartments for the confinement of sulfur in Li-S battery. The performances of these ppy-S-in-MOF electrodes excel those of the MOF and ppy counterparts, especial...

Time Is Ethics.

Early in my career as a neonatologist, I was called into the hospital for a newborn who would not stop crying. Screaming, really. When I entered the unit, I was greeted by a loud, shrill, distinctive cry. After hearing the history and examining the baby, I just stood there for a while, watching and listening. It took some time, but eventually, I noticed a subtle regularity, a rhythmicity. I took off my watch, placed it on the bed next to the child, and found that the crying briefly grew louder about every s...

Preparation of cyclic prodiginines by mutasynthesis in Pseudomonas putida KT2440.

Prodiginines are a group of naturally occurring pyrrole alkaloids produced by various microorganisms, which are known for their broad biological activities. The production of nature inspired cyclic prodignines was enabled by combining organic syntheses with a mutasynthesis approach using the GRAS (generally recognized as safe) certified host strain Pseudomonas putida. The newly prepared prodiginines exerted an antimicrobial effect against relevant alternative biotechnological microbial hosts while P. putida...

Argonaute Facilitates the Lateral Diffusion of Guide along Its Target and Prevents Guide from Being Pushed Away by Ribosome.

Argonaute (AGO) proteins play central roles in nucleic acid-guided interferences that regulate gene expression and defend against foreign genetic elements in all life. Although much progress has been made on the function of argonaute proteins in target recognition and cleavage, the detailed mechanism of their biological functions is not fully under-stood. Here, using AFM-based single-molecule force spectroscopy, we studied the target-guide dissociation in the absence or presence of Thermus thermophiles AGO ...


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