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Showing 1 to 20 of 6928 for “"ion"”.
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Ion-Sensitive Atpases and Ion Transport in Plant Roots
Made available in DSpace on 2015-05-13T22:12:24Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7020963.PDF: 2887221 bytes, checksum: 7e066d481e4c7b2472358c40aebd0a6e (MD5) Previous issue date: 1970
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Effects of Surface Ion Milling on Ion Trap Heating
Ions trapped above a surface electrode chip are a viable candidate for a scalable qubit architecture. The internal electronic state of the ions serve as qubits, while the shared motional modes of ions in a lattice serve as a quantum bus by which information can be shared. Gate operations are …
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Engineering ionic liquid ion sources for ion beam applications
Ionic liquid ion sources (ILIS) are devices capable of producing positive and negative molecular ion beams through field evaporation from room-temperature molten salts. If sufficiently high hydraulic impedance from the liquid-supporting emitter is provided such that the ratio of flow rate Q to …
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Screen-printed ion selective electrodes for soil ion detection
… lack an available, affordable, usable, and actionable means to diagnose soil health, which is a prerequisite for judicious application of fertilizer. Although government labs and mobile kits are available, these fail to meet the aforementioned qualities; as a result fewer than 5% of rural …
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Optimizing Ion-Shuttling Operations in Trapped-Ion Quantum Computers
Trapped ions are a promising candidate for quantum computation. As experiments with ions increase in size and complexity, a trap array-based architecture for an ion trap with many independent zones provides a path towards large-scale integration. A crucial element in the operation of a trap array …
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Material engineering for Li-ion capacitors and Li-ion batteries
… behind personal and industrial electronics. Li-ion batteries became the most prevalent rechargeable energy storage technology in market because of a high energy density. However, a power density (especially charging) of Li-ion batteries is not satisfactory for certain applications. In this …
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Characterization of ion Cluster fragmentation in ionic liquid ion sources
Ion electrospray propulsion is a cutting-edge micropropulsion technology that could revolutionize the capabilities of microsatellites. Ion electrospray thrusters could also be used on large spacecraft for precision attitude control applications such as gravity wave detection and exoplanet imaging. …
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The Gas-Phase Oxidation of Cationic Bioanalytes via Ion/Ion Reactions
Several solution-phase derivatizations have recently been implemented in the gas-phase through the interaction between oppositely charged ions, viz., ion/ion reactions. The work presented here primarily focuses on the oxidation of bioanalytes via ion/ion reactions with periodate and persulfate …
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Characterization of ionic liquid ion sources for focused ion beam applications
In the Focused Ion Beam (FIB) technique, a beam of ions is reduced to nanometer dimensions using dedicated optics and directed to a substrate for patterning. This technique is widely used in micro- and nanofabrication for etching, material deposition, microscopy, and chemical surface analysis. …
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Development of an ion transport system for singly charged ion injection into an electron string ion source (ESIS) charge-breeder
A 1+ ion delivery system was designed and constructed for the purpose of ion injection into the Electron String Ion Source (ESIS) charge-breeder at the Joint Institute for Nuclear Research (JINR) in Dubna, Russia. The transport system was initially developed at iThemba LABS in Cape Town. This …
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Gas-Phase Covalent And Non-Covalent Ion/ion Chemistry Of Biological Macromolecules
<p>Gas-phase ion/ion chemistry involves the interaction of oppositely charged ions inside of the mass spectrometer. During this gas-phase chemistry, particle transfer (i.e., proton and electron) or synthesis can occur at rapid reaction rates. Particle transfer represents a mature area of ion/ion …
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Activity of Sodium Ion, Potassium Ion in the Epididymis of the Rat
… enzyme activity and its regulation was determined in the ductuli efferentes and the initial segment of the epididymis of the rat. Electron microscopic localization of Na$\sp+$,K$\sp+$-ATPase demonstrated enzyme activity along the cytoplasmic side of the plasmalemma of the ductal …
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Experimental and Modeling Studies of Low-Energy Ion Sputtering for Ion Thrusters
… xenon-molybdenum (Xe+-Mo) sputtering yields for ion energies of 100 eV and less. Sputtering yield data at these energies are important for ion thruster design and lifetime prediction. The basic principles of sputtering phenomena are discussed. An overview of various popular types of experimental …
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Electrochemically prepared metal antimonide nanostructures for lithium ion and sodium ion battery anodes
… a critical factor for the successful implementation of renewable energy generation and efficiency strategies at the grid, transportation, and consumer levels. Current batteries suffer from limitations in energy density, power density, longevity, and overall cost. In addition, the inherent …
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Determination of formaldehyde by ion exclusion and ion exchange separation with amperometric detection
A method has been developed for determination of formaldehyde in air sample extracts by ion exclusion and ion exchange separation followed by amperometric detection. Optimum eluant compositions and separation columns for the best separation have been determined, as well as the optimum working …
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Ion Aggregation, Correlated Ion Transport and the Double Layer in Super-Concentrated Electrolytes
… are well known and their mathematical descriptions are well established. The physical picture of dilute electrolytes, in which ions are pristinely solvated, fully dissociated, and immersed in an excess of structureless solvent medium, lends itself naturally to elegant and tidy mathematical …
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Synthetic ion transporters: new analytical approaches for the investigation of ion binding and transport
Synthetic ion transporters: new analytical approaches for the investigation of ion binding and transport by Ionut Alexandru Carasel Doctor of Philosophy in Chemistry Washington University in St. Louis, 2010 Dr. George W. Gokel, co-Chair Dr. Kevin Moeller, co-Chair The work reported in this …
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Low ion dose imaging in the Helium Ion Microscope under Neyman Type A statistics
The Helium Ion Microscope (HIM) is a new tool capable of imaging at resolutions not possible in the ubiquitous Scanning Electron Microscope (SEM). However, along with this improvement in imaging, the helium ions used in HIM cause greater damage to samples. Reducing ion doses decreases the amount of …
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