Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 3684 for “"Ions"”.
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Photodissociation of molecular ions and low-energy collisions of atoms and ions
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1993.
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Bias, Uncertainty and Ions
This dissertation discusses the development of novel visualization techniques for biopolymer structures, the application of machine learning to biophysical data, and an in depth atomic-level investigation of a therapeutic nucleic acid called “F10.”
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Detecting single, trapped ions
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1988.
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Carbonate Ions and Gastric Cancer
… (17%). In a second set of experiments, calcium ions were switched to sodium ions, which revealed that carbonate ions caused the remarkable increase in cancer in the rats given an altered diet (54%, compared to 12% for controls). Both experimental and clinical studies have shown that DGR is …
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Fluorescent sensors for metal ions
… importance in recent years due to their applications in many fields including trace analysis in chemistry and biochemistry. Using the "dual fluorescence" properties of TICT state compounds (Twisted Intramolecular Charge Transfer which gives an extra red-shifted emission band) and the key property …
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Vinylogs of Hindered Carboxylate Ions
Made available in DSpace on 2015-05-12T17:02:31Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0009118.PDF: 2733678 bytes, checksum: 1e1bb0ca233323a7230bf8ac226343d5 (MD5) Previous issue date: 1954
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Rotational Spectroscopy of Molecular Ions
Made available in DSpace on 2014-12-13T20:10:47Z (GMT). No. of bitstreams: 1 8009019.pdf: 4354821 bytes, checksum: 91befa8e421b9008f874b81936648543 (MD5) Previous issue date: 1979
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Surface trap for ytterbium ions
We conducted an experiment to load a shallow planar ion trap from a cold atom source of Ytterbium using photoionization. The surface trap consisted of a three-rod radio frequency Paul trap fabricated using standard printed circuit board techniques. The cold atom source was an isotope-selective …
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Localization of metal ions in DNA
… complex formed between DNA and transition metal ions under alkaline conditions. The unique properties of M-DNA were manipulated in order to rationally place metal ions at specific regions within a double-stranded DNA helix. Investigations using thermal denaturation profiles and the ethidium …
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Mobilities of Ions in Collodion Membranes
Made available in DSpace on 2015-05-12T17:11:39Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0003596.PDF: 3017849 bytes, checksum: ca8794ace188ae0465a13cd4c7dbada1 (MD5) Previous issue date: 1952
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Spiro(2.n)alkyl Carbonium Ions
Made available in DSpace on 2014-12-09T17:35:37Z (GMT). No. of bitstreams: 1 6706556.pdf: 6803990 bytes, checksum: b94e76692af7c78fabdfd99459063fbb (MD5) Previous issue date: 1966
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The asymptotic expansion method for heliumlike ions
… the asymptotic expansion method to helium like ions for any value of Z and tests its accuracy against high precision variational calculations [311 for angular momentum L up to 7 and nuclear charge up to 18. For the exited states variational calculations become more difficult and the results' …
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STABILITY AND SPECTROSCOPIC PROPERTIES OF NEGATIVE IONS
Negative ions play an important role in chemistry as building blocks of salts and oxidizing agents. Halogen atoms, due to their ability to attract electrons, readily form negative ions. Considerable interest exists in the design and synthesis of new negative ions called superhaogens whose electron …
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Chromatographic Fractionation of the Hydrous Oxide Ions
… analysis of mixtures by passage of their solutions through an adsorbent column. The different constituents adsorb at different rates, and advantage is taken of this property to separate the components into different sections of the column. |Schoenbein in 1861 was the first to show that, when …
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Spectroscopic Studies of Some Semiquinone Radical Ions
… and UV spectroscopic studies of semiquinone cations are reviewed. Cations of 4,4'-bipheno-semiquinones prepared by chemical oxidation of the corresponding diols and reduction of the quinones in sulphuric acid, were studied using ESR and UV spectroscopy. Oxidation of biphenyl-4,4'-diol in …
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Electrochemical Measurement of Metal Ions in Water
Pb2+ between 0 and 50 PPB is measured electrochemically in synthetic and real drinking water by square wave anodic stripping on a gold working electrode. The rate constant of the anodic stripping of Pb0 from gold has a rate constant of approximately k0 = 3 s-1. A set of square wave profiles defined …
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