PubMed Journals Articles About "Global Asia Long Type Cast Nickel Molybdenum Alloy" RSS

19:31 EDT 19th March 2019 | BioPortfolio

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Showing "Global Asia Long Type Cast Nickel Molybdenum Alloy" PubMed Articles 1–25 of 28,000+

Nesting Co3Mo Binary Alloy Nanoparticles onto Molybdenum Oxide Nanosheet Arrays for Superior Hydrogen Evolution Reaction.

Transition-metal alloy has attracted a great deal of attention as an alternative to Pt-based catalysts for hydrogen evolution reaction (HER) in alkaline. Herein, a facile and convenient strategy to fabricate Co3Mo binary alloy nanoparticles nesting onto molybdenum oxide nanosheet arrays on nickel foam is developed. By modulating the annealing time and temperature, the Co3Mo alloy catalyst displays a superior HER performance. Owing to substantial active sites of nanoparticles on nanosheets, as well as the in...

Microstructure, mechanical properties, biocompatibility, and in vitro corrosion and degradation behavior of a new Zn-5Ge alloy for biodegradable implant materials.

Zinc (Zn)-based alloys are considered a new class of biodegradable implant materials due to their superior chemical stability and processability compared to biodegradable magnesium (Mg) alloys. In this study, we report a new biodegradable Zn-5Ge alloy with highly desirable mechanical, corrosion, and biological properties. Microstructural characterization revealed the effective grain-refining effect of germanium (Ge) on the Zn alloy. Tensile test results indicated that the hot-rolled Zn-5Ge alloy showed an u...

Regulating the mechanical properties of nanocrystalline nickel via molybdenum segregation: an atomistic study.

The effects of segregation of impurity molybdenum (Mo) atoms on the tensile mechanical properties of nanocrystalline nickel (Ni) are investigated with molecular dynamics simulation. Results show that the segregation of Mo atoms induces an obvious increase in the elastic modulus and strength of nanocrystalline Ni, and the strengthening effect is more significant with smaller grain size. When the grain size decreases below a critical value, at which the softening occurs in non-segregated Ni-Mo alloy, no evide...

Characterization of T cell receptors in a novel murine model of nickel-induced intraoral metal contact allergy.

Nickel is a component of several alloy types that are widely used in our environment, including several dental alloy types that cause intraoral metal contact allergy. However, metal-specific immune responses in the oral mucosa have not been elucidated because a suitable animal model has not been established. In this study, we established a novel murine model of nickel-induced intraoral metal contact allergy and aimed to elucidate the immune response in terms of T-cell receptor repertoire and cytokine profil...

Influence of chelate ring type on chelate-chelate and chelate-aryl stacking: the case of nickel bis(dithiolene).

Chelate-aryl and chelate-chelate stacking interactions of nickel bis(dithiolene) were studied at the CCSD(T)/CBS and DFT levels. The strongest chelate-aryl stacking interaction between nickel bis(dithiolene) and benzene has a CCSD(T)/CBS stacking energy of -5.60 kcal mol-1. The strongest chelate-chelate stacking interactions between two nickel bis(dithiolenes) has a CCSD(T)/CBS stacking energy of -10.34 kcal mol-1. The most stable chelate-aryl stacking has the benzene center above the nickel atom, while the...

Effects of laser shock peening on the corrosion behavior and biocompatibility of a nickel-titanium alloy.

Nickel-titanium (NiTi) alloy is an attractive material for biomedical implant applications. In this study, the effects of laser shock peening (LSP) on the biocompatibility, corrosion resistance, ion release rate and hardness of NiTi were characterized. The cell culture study indicated that the LSP-treated NiTi samples had lower cytotoxicity and higher cell survival rate than the untreated samples. Specifically, the cell survival rate increased from 88 ± 1.3% to 93 ± 1.1% due to LSP treatment. LSP treatmen...

The Role of Molybdenum Oxysulfide Rings in the Formation of Two-Dimensional Molybdenum Disulfide by Powder Vaporization.

Sulfurization of molybdenum trioxide by elemental sulfur through powder vaporization is a common method used for growth of molybdenum disulfide. Optimization of complexes between sulfur allotropes and molybdenum species using Density Functional Theory has revealed the molecular mechanism of sulfurization. Complete sulfurization of molybdenum trioxide to molybdenum disulfide requires at least three sets of nucleophilic addition-elimination reactions that generate the experimentally observed molybdenum oxysul...

Nonprecious Alloy vs Precious Alloy Telescopic Crown-Retained Removable Partial Dentures: Survival and Maintenance Needs.

The purpose of this retrospective clinical study was to evaluate the clinical outcomes of nonprecious alloy (NPA) vs precious alloy (PA) telescopic crown-retained removable partial dentures (TRPDs), the factors influencing survival, and the type and number of maintenance procedures required during the observation period.

Investigation of Fused Alumina Based-Mold Facecoats for DZ22B Directionally Solidified Blades.

The interaction between alloy melt and mold facecoats is the main factor affecting the surface quality of investment casting nickel-based superalloys. An investigation was undertaken to develop suitable refractories as facecoat materials for the directionally solidified blades of DZ22B nickel-based superalloys in order to avoid a sand-burning defect. The wettability and interface reactions between alloy melt and various facecoats were studied by using a sessile drop experiment and the real investment castin...

Ultrafine Metallic Nickel Domains and Reduced Molybdenum States Improve Oxygen Evolution Reaction of NiFeMo Electrocatalysts.

An electrocatalyst for oxygen evolution reaction (OER) is essential in the realization of renewable energy conversion technologies, but its large overpotential, slow charge transfer, and degradation of surface reaction sites are yet to be overcome. Here, it is found that the metallic nickel domains and high-valence reduced molybdenum ions of NiFeMo electrocatalysts grown on a 3D conductive and porous electrode without using binders enable ultrahigh performance in OER. High resolution-transmission electron m...

Slanted Ag-Al alloy nanorods arrays for highly active and stable SERS substrates.

Aluminum has been established as an earth-abundant and cheap alternative to gold and silver for plasmonic applications. Particularly, aluminum prefers to combine with oxygen compared with silver. Here, a simple physical vapor co-deposition (PVD) technique is presented to prepare the Ag-Al alloy nanorods (NRs) with a small amount of aluminum. The role of aluminum is to combine oxygen or corroded substances under certain conditions, such as in the air and in the etchants. Beside this, owing to the large diffu...

Analysis of multielemental thin films via calibration-free laser-induced breakdown spectroscopy.

Elemental analyses of thin films with complex composition are challenging as the standard analytical techniques based on measurement calibration are difficult to apply. We show that calibration-free laser-induced breakdown spectroscopy (LIBS) presents a powerful solution, enabling quantitative analyses of multielemental thin films with analytical performances better than those obtained with other techniques. The demonstration is given for a nickel-chromium-molybdenum alloy film of 150 nm thickness that was ...

Mechanical properties, in vitro corrosion resistance and biocompatibility of metal injection molded Ti-12Mo alloy for dental applications.

A biocompatible Ti-12Mo alloy was fabricated by metal injection moulding (MIM) using non-spherical titanium, molybdenum powders and a purposely designed binder. The density, microstructure and tensile properties were characterized. This was followed by a detailed assessment of its in vitro corrosion and biocompatibility performances, compared with that of two commonly used titanium-based materials extra low interstitial (ELI) Ti-6Al-4V and commercially pure (CP) titanium. The MIM-fabricated Ti-12Mo alloy ca...

Dissimilar effects of two El Niño types on PM concentrations in East Asia.

We investigate the effects of natural variability of meteorological fields on surface PM concentration changes in East Asia during El Niño periods for the past three decades (1980-2014) through GEOS-Chem 3D global chemical transport model simulations. First, our evaluation of the model with anthropogenic emissions for 2006 and a comparison against observations show that the simulated results accurately reproduced the observed spatial distribution of annual mean aerosol concentrations for 2006-2007 includin...

Dislocated distal radial fractures in adult patients: 4 weeks versus 6 weeks of cast immobilisation following reduction, a multicentre randomised controlled trial, study protocol.

Up to 30% of patients with a dislocated distal radial fracture (DRF) treated with closed reduction and cast immobilisation suffer from long-term functional restrictions. It remains unclear, whether duration of cast immobilisation influences functional outcome. The aim of this study is to evaluate whether the functional outcome of dislocated DRFs could be improved by shortening the period of immobilisation.

3D hollow nanoflowers assembled by ultrathin molybdenum-nickel phosphide nanosheets as robust electrocatalysts for oxygen evolution reaction.

Designing cost-efficient and durable electrocatalysts toward oxygen evolution reaction (OER) has been of vital significance for the commercial development of various renewable energy systems. Herein, we report the construction of a new class of 3D hollow nanoflower catalysts that assembled by ultrathin nickel-molybdenum phosphide nanosheets. Owing to the increased electronic and ion transport channels, the heteroatom doping, and synergistic effects from the interconnected compositions, the newly-generated 3...

Comparison of Nickel Sulfate 2.5% and Nickel Sulfate 5% for Detecting Nickel Contact Allergy.

Nickel is among the most common contact allergens found on patch testing worldwide and, because of its ubiquitous nature in our environment, often has important implications for allergen avoidance strategies. In both North America and Europe, nickel positivity is found in approximately 20% of patients who undergo patch testing. Whereas in North America, nickel sulfate is typically tested at a concentration of 2.5%, in Europe, it is tested at a 5% concentration.

Shutdown will cast a long shadow over research.

Nickel release from metal tools in the German hairdressing trade - a current analysis.

Nickel is one of the most common contact allergens. Despite EU regulations concerning maximum permissible release of nickel from metal objects, nickel release at inappropriately high levels from metal objects was detected in various studies.

XANES/EPR Evidence the Oxidation of Nickel(II) Quinolinylpropi-oamide and Its Application of Csp3-H Functionalization.

An in-situ generated oxidation species of nickel quino-linylpropioamide intermediate was produced. Characterization by XANES and EPR provides complementary insights into this oxidized nickel species. With aliphatic amides and isocyanides as substrates, a nickel-catalyzed facile synthesis of structurally diverse five-membered lactams could be achieved.

One-step preparation of molybdenum disulfide/graphene nano-catalysts through a simple co-exfoliation method for high-performance electrocatalytic hydrogen evolution reaction.

Recently, molybdenum disulfide (MoS) as a new type of catalyst, has been used for hydrogen evolution. In order to overcome the shortcomings of MoS, such as poor conductivity and lack of catalytic activity sites, various materials were added to prepare composites, such as graphene with good conductivity.

Guiding Uniform Li Plating/Stripping via Lithium Aluminum Alloying Medium for Long-Life Li Metal Batteries.

The uncontrolled growth of Li dendrites upon cycling might engender low Coulombic efficiency and severe safety hazards. Here, a lithiophilic binary alloy phase-lithium aluminum layer, which generated via a in situ electrochemical process, was utilized to guide the uniform metallic Li nucleation and growth, free from the dendrites. Moreover, the formed LiAl alloy layer can function as a Li reservoir to compensate the irreversible Li loss, enabling a long-term stability. The protected Li electrode renders sup...

Room-Temperature Liquid Na-K Anode Membranes.

The Na-K alloy is a liquid at 25 °C over a large compositional range. The liquid alloy is also immiscible in the organic-liquid electrolytes of an alkali-ion rechargeable battery, providing dendrite-free liquid alkali-metal batteries with a liquid-liquid anode-electrolyte interface at room temperature. The two liquids are each immobilized in a porous matrix. In previous work, the porous matrix used to immobilize the alloy was a carbon paper that is wet by the alloy at 420 °C; the alloy remains in the pape...

New metal cofactors and recent metallocofactor insights.

A vast array of metal cofactors are associated with the active sites of metalloenzymes. This Opinion describes the most recently discovered metal cofactor, a nickel-pincer nucleotide (NPN) coenzyme that is covalently tethered to lactate racemase from Lactobacillus plantarum. The enzymatic function of the NPN cofactor and its pathway for biosynthesis are reviewed. Furthermore, insights are summarized from recent advances involving other selected organometallic and inorganic-cluster cofactors including the la...

Fabrication of a lightweight Al alloy mirror through 3D printing and replication methods.

In order to realize rapid fabrication of a lightweight mirror, an AlSi10Mg alloy mirror was made through 3D printing and replication methods. The mechanical, thermal, and physical properties, the surface accuracy, and the dimensional stability were investigated. Through a selective laser melting method, an Al alloy mirror was printed and exhibited a low areal density of 28.4  kg/m. Through replication, the mirror surface accuracy was improved to 0.033λ (root mean square, λ=632.8  nm); surface roug...

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