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PubMed Journals Articles About "Future Decentralized Exchange High Performance Value Exchange Using" RSS

07:17 EDT 20th March 2019 | BioPortfolio

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Showing "Future Decentralized Exchange High Performance Value Exchange using" PubMed Articles 1–25 of 44,000+

Selective Ion Exchange Induced by Supramolecular Channel in Crystalline State.

Artificial ion channels are of increasing interest because of potential applications in biomimetics, e.g., for realizing selective ion permeability via the transport and/or exchange of selective ions. However, the selective ion transport and/or exchange in the crystalline state is rare, and to our knowledge, this function with changes in the physical properties of a material has not been achieved. In this study, by soaking single crystals of Li₂([18]crown-6)₃[Ni(dmit)₂]₂(H₂O)₄ (1) in an aqueous ...


Characterization of the Ligand Exchange Reactions on CdSe/ZnS QDs by Capillary Electrophoresis.

The continuous development of semiconductor quantum dots (QDs) in biochemical research has attracted special attention and surface functionalizing becomes more important to optimize their performance. Ligand exchange reactions are commonly used to modify the surface of QDs for their biomedical applications. However, the kinetics of ligand exchange for semiconductor QDs remain fully unexplored. Here, we describe a simple and rapid method to characterize the ligand exchange reactions on CdSe/ZnS QDs by capill...

Comparison of consumers' perspectives on different health information exchange (HIE) mechanisms: an experimental study.

Consumers' willingness to allow the distribution of their health data is a prerequisite for the success of any health information exchange (HIE) initiative. Several mechanisms are being used by healthcare organizations to exchange health information electronically. Our goal is to investigate how patients' preferences regarding information exchange (i.e., privacy concern, opt-in intention, and perceived health information sensitivity) are affected by different HIE models and exchange architectures.


Root-soil structure inspired hydrogel microspheres with high dimensional stability and anion-exchange capacity.

Ion exchange materials show great advantages in water purification, food industry, pharmaceutical industry, etc. However, the ion exchange capacities of ion exchange materials, especially for anion-exchange materials, at present are still relatively low. Hydrogels own abundant functional groups and show high hydrophilicity, and thus are recognized as high-potential ion exchange materials, but may deform and even crush in use due to their low mechanical strength and unavoidable swelling behavior. In this stu...

The reHISS Three-Range Exchange Functional with an Optimal Variation of Hartree-Fock and Its Use in the reHISSB-D Density Functional Theory Method.

In the present study, we have reparametrized the HISS exchange functional. The new "reHISS" exchange provides a balance between short- and mid-range Hartree-Fock exchange (HFX) and a large total HFX coverage, with a fast convergence to zero HFX in the long range. The five parameters in this functional (according to equations 3 and 4 in the main text) are c = 0.15, c = 2.5279, c = 0, ω = 0.27, and ω = 0.2192. The combination of reHISS exchange with a reparametrized B97c-type correlation functional (Chan et...

Long-term performance of biological ion exchange for the removal of natural organic matter and ammonia from surface waters.

Anionic exchange is an effective treatment option for the removal of natural organic matter from surface waters. However, the management of the spent brine regenerant often limits the adoption of this process. The current study reports one year of operation of ion exchange resins under biological mode (BIEX, i.e. without regeneration to promote biofilm growth on the media) compared to the performance of (i) ion exchange with weekly regeneration (IEX), (ii) granular activated carbon under biological mode (BA...

Exponential Scaling of Water Exchange Rates with Ion Interaction Strength from the Perspective of Dynamic Facilitation Theory.

Water exchange reactions around ionic solutes are ubiquitous in aqueous solution-phase chemistry. However, the extreme sensitivity of exchange rates to perturbations in the chemistry of an ionic solute is not well understood. We examine water exchange around model ions within the language of dynamic facilitation theory, typically used to describe glassy and other systems with collective, facilitated dynamics. Through the development of a coarse-grained, kinetically-constrained lattice model of water exchang...

Enhanced selectivity and performance of heterogeneous cation exchange membranes through addition of sulfonated and protonated Montmorillonite.

Novel heterogeneous cation exchange membranes, based on poly (ether sulfone) and cation exchange resin, were prepared with the addition of protonated and sulfonated Montmorillonite (MMT) nanoparticles. Detailed investigations were then carried out studying the morphology, physical properties and the performance of membranes. It is observed that addition of MMT, leads to a substantially better distribution of ion exchange resin in the polymer matrix. This leads, at low loadings of MMT (0.5 wt.%), to membra...

The Performance of two silica based ion exchange resins in the separation of Bi from its parent solution of Ac.

The performance of two inorganic ion exchange resins, Isolute SCX and Isolute SCX-2, were compared to the performance of the organic resin AG-50X8 in the separation of the radionuclide bismuth-213 from its parent solution of actinium-225. The breakthrough of the actinium-225 for all three columns was well below the toxicity level but the Isolute SCX and Isolute SCX-2 produced less of the bismuth-213 available on the column.

Metal Catalysts for Layer Exchange Growth of Multilayer Graphene.

Metal-induced layer-exchange growth of amorphous carbon (a-C) is a unique technique for fabricating high-quality, uniform multilayer graphene (MLG) directly on an insulating material. Here, we investigated the effect of transition metal species on the interaction between metals and a-C in the temperature range of 600-1000 °C. As a result, metals were classified into four groups: (1) layer exchange (Co, Ni, Cr, Mn, Fe, Ru, Ir, and Pt), (2) carbonization (Ti and Mo), (3) local MLG formation (Pd), and (4) no ...

An Alkaline-Exchange Polymer Membrane Electrolyte for High Performance of All-Solid-State Electrochemical Devices.

As a potential solution to ubiquitous energy concerns, anion-exchange membranes (AEMs) have been widely used as the electrolyte in alkaline fuel cells (AFCs), and significant refinement of AEMs has been achieved in the past few decades. However, it remains unknown whether AEMs can be used as an electrolyte in a solid-state supercapacitor or zinc air battery. A low-cost alkaline exchange-membrane electrolyte comprised of chitosan (CS) and poly(diallyldimethylammonium chloride) (PDDA) that possesses a high OH...

Capturing exchange using periodic radiofrequency irradiation.

The dynamics of spin system coupled by chemical exchange between two sites with different chemical shifts during periodic radiofrequency (RF) irradiation was here investigated. When the instantaneous π-flip of effective frequency during the course of frequency sweep was applied, a significant increase of exchange-induced relaxation rate constants was observed for small tip angle of magnetization in the laboratory frame of reference. This increase of the rate constants corresponds to the side bands generate...

The Halogen-Samarium Exchange Reaction. Synthetic Applications and Kinetics.

Fast I/Sm- and Br/Sm-exchanges take place when treating various aromatic or heterocyclic iodides and bromides with nBu2SmCl·4LiCl or nBu3Sm·5LiCl respectively. The resulting organosamarium reagents were efficiently quenched with aldehydes, ketones, and imines. Also, they undergo acylations when treated with N,N-dimethylamides leading to ketones. The rate of the Br/Sm-exchange on a typical aryl bromide was determined and showed that it was 8.5·105 faster than the Br/Mg-exchange, supporting that the rate o...

A Simple Method to Screen for Radiostrontium in Water by Ion Exchange Chromatography.

Radiostrontium isotopes (Sr, Sr, and Sr) are major fission by-products in nuclear reactors, in radiological events, and in environmental radioactive contamination. A method to analyze Sr and Sr in water has been developed using gradient elution with dilute hydrochloric acid and cation exchange resin, followed by carbonate precipitation. Counting was done on a gas proportional counter. The sample was recounted a second time after 2 to 3 wk to permit Y, a progeny of Sr, to achieve secular equilibrium and to a...

Anion exchange of Ni-Co LDH nanoarrays for a high-capacitance supercapacitor electrode: A comparison of alkali anion exchange and sulfuration.

A facile and novel anion exchange process is presented by converting NiCo-CO3 LDH nanosheet arrays in an alkaline solution. The anions exchange between CO32- and OH- results in the construction of the reservoir for OH- anions, and the decoration of thin nanoflakes on the surface of nanosheets enlarges effectively the surface area of NiCo LDH nanoarrays. The capacitance of the as-soaked NiCo LDH nanoarrays electrode increases from 1.78 F·cm-2 (684 F·g-1) to 6.22 F·cm-2 (2391 F·g-1) at 2 mA·cm-2 after so...

Performances of Anion-Exchange Blend Membranes on Vanadium Redox Flow Batteries.

Anion exchange blend membranes (AEBMs) were prepared for use in Vanadium Redox Flow Batteries (VRFBs). These AEBMs consisted of 3 polymer components. Firstly, PBI-OO (nonfluorinated PBI) or F6-PBI (partially fluorinated PBI) were used as a matrix polymer. The second polymer, a bromomethylated PPO, was quaternized with 1,2,4,5-tetramethylimidazole (TMIm) which provided the anion exchange sites. Thirdly, a partially fluorinated polyether or a non-fluorinated poly (ether sulfone) was used as an ionical cross-l...

Convergent parallel mixed-methods study to understand information exchange in paediatric critical care and inform the development of safety-enhancing interventions: a protocol study.

The effective exchange of clinical information is essential to high-quality patient care, especially in the critical care unit (CCU) where communication failures can have profoundly negative impacts on critically ill patients with limited physiological capacity to tolerate errors. A comprehensive systematic characterisation of information exchange within a CCU is needed to inform the development and implementation of effective, contextually appropriate interventions. The objective of this study is to charac...

Air-Stable CuInSe2 Nanocrystal Transistors and Circuits via Post-Deposition Cation Exchange.

Colloidal semiconductor nanocrystals (NCs) are a promising materials class for solution-processable, next-generation electronic devices. However, most high-performance devices and circuits have been achieved using NCs containing toxic elements, which may limit their further device development. We fabricate high mobility CuInSe2 NC field-effect transistors (FETs) using a solution-based, post-deposition, sequential cation exchange process that starts with electronically-coupled, thiocyanate (SCN)-capped CdSe ...

Rapid detection of the presence of diffusion exchange.

Diffusion exchange spectroscopy (DEXSY) provides a detailed picture of how fluids in different microenvironments communicate with one another but requires a large amount of data. For DEXSY MRI, a simple measure of apparent exchanging fractions may suffice to characterize and differentiate materials and tissues. Reparameterizing signal intensity from a PGSE-storage-PGSE experiment as a function of the sum, b=b+b, and difference b=b-b of the diffusion encodings separates diffusion weighting from exchange weig...

The pay transparency dilemma: Development and validation of the Pay Information Exchange Preferences Scale.

Although calls for pay transparency in the workplace are growing, it remains unclear which factors determine when and why employees exchange pay information. We use a social comparison theory lens to identify the pay transparency dilemma, wherein pay information exchange can create benefits by reducing uncertainty and verifying equitable pay, but simultaneously risks straining interpersonal relationships and damaging reputations. To examine individual differences in employee sensitivity to the risks and ben...

Molecular Tunability of Magnetic Exchange Bias and Asymmetrical Magnetotransport in Metalloporphyrin/Co Hybrid Bilayers.

Molecular spins as individual are promising quantum states for emerging computation technologies. The "on surface" configuration of molecules in proximity to a magnetic film allows control over the orientations of molecular spins and coupling between them. The stacking of planar molecular spins could favor antiferromagnetic interlayer couplings and lead to pinning of the magnetic underlayer via the exchange bias, which is extensively utilized in ultrafast and high-density spintronics. However, fundamental u...

Complete Chain of the First Global Kidney Exchange Transplant and 3-yr Follow-up.

Global Kidney Exchange (GKE) offers an opportunity to expand living renal transplantation internationally to patients without financial means. These international pairs are entered into a US kidney exchange program that provides long-term financial support in an effort to identify opportunities for suitable exchanges for both these international pairs and US citizens.

Efficient Removal of UO22+, Cs+ and Sr2+ Ions by Radiation-Resistant Gallium Thioantimonates.

Unconventional ion exchangers can achieve efficient removal of [UO2]2+, Cs+ and Sr2+ ions from complex aqueous solutions and are of great interest for environmental remediation. We report two new gallium thioantimonates, [Me2NH2]2[Ga2Sb2S7]·H2O (FJSM-GAS-1) and [Et2NH2]2[Ga2Sb2S7]·H2O (FJSM-GAS-2) which present excellent ion exchange properties for [UO2]2+, Cs+ and Sr2+ ions. They exhibit high ion exchange capacities for [UO2]2+, Cs+ and Sr2+ ions (qmU = 196.10 mg/g, qmCs = 164.23 mg/g and qmSr = 79.79 mg...

Chemical Tuning of Magnetic Exchange Couplings Using Broken-Symmetry Density Functional Theory.

With broken-symmetry Kohn-Sham density functional theory calculations, it is demonstrated that the ferromagnetic or anti-ferromagnetic character of two prototypical binuclear copper complexes can be modified, both in the sign and in magnitude, by means of chemical substitutions operated on the bridges connecting the two magnetic centers. The level of detail provided by the magnetic exchange decomposition in terms of direct exchange, kinetic exchange, and core polarization puts forward the relative importanc...

Media Exchange Performance Test Using the Bradford Assay in an Automated Bioreactor Engineering Model for Space Experiments.

Life science research has been actively carried out in space for a long time using bioreactor equipment, in anticipation of manned space exploration and space tourism. Such studies have reported that the microgravity environment has a negative effect on the human body, including the musculoskeletal system, nervous system, and endocrine system. Bone loss and muscular atrophy are issues that need to be resolved before long-term exposure of the human body to a space environment. To address this problem, Y. K. ...


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