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Topic Area: Bioscience

Displaying records 371 to 380 of 455 records.
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371. Infrared Spectroscopic Ellipsometry of Self-Assembled Monolayers
Topic: Bioscience & Health
Published: 11/28/2000
Author: Curtis W Meuse
Abstract: Ellipsometry measures the relative intensity of and the phase difference between the parallel (p) and perpendicular (s) components of an electric field vector interacting with a sample. In this paper, a technique using polarized Fourier transform in ...

372. Atomic force microscope imaging of molecular aggregation during self-assembled monolayer growth
Topic: Bioscience & Health
Published: 11/1/2000
Authors: I. Doudevski, W. A. Hayes, John Taylor Woodward IV, D. K. Schwartz

373. Characterization of a Novel 8-Oxoguanine-DNA Glycosylase Activity in Escherichia Coli and Identification of the Enzyme as Endonuclease VIII
Topic: Bioscience & Health
Published: 9/1/2000
Authors: T. K. Hazra, T. Izumi, R Venkataraman, Y W Kow, M. Dizdaroglu, Somenath Mitra
Abstract: 8-oxoguanine (G*), induced by reactive oxygen species, is mutagenic because it mispairs with A. The major G*-DNA glycosylase (OGG), namely, OGG1 in eukaryotes, or MutM in Escherichia coli, excises G* when paired in DNA with C, G and T, but not A, pr ...

374. Oxidative DNA Damage and Its Potential Use for Monitoring Oxidative Stress
Topic: Bioscience & Health
Published: 9/1/2000
Author: M. Dizdaroglu

375. Diffusion Bias and Photophysical Dynamics of Single Molecules in Unsupported Lipid Bilayer Membranes Probed with Confocal Microscopy
Topic: Bioscience & Health
Published: 7/1/2000
Authors: D L. Burden, John J Kasianowicz
Abstract: We utilize scanning confocal fluorescence microscopy to interrogate single fluorescent lipid molecules in unsupported planar bilayers. At high photon flux, an optical trapping effect appears that is approximately 100,000 times larger than predicted ...

376. The Effect of an Oxidized Gold Substrate on Alkanethiol Self-Assembly
Topic: Bioscience & Health
Published: 6/1/2000
Authors: John Taylor Woodward IV, Marlon L Walker, Curtis W Meuse, David J Vanderah, G Poirier, Anne L Plant
Abstract: UV cleaned gold substrates incubated in solutions of alkanethiol show islands on the monolayer surface when imaged with non-contact atomic force microscopy (AFM). The height of the islands above the monolayer is approximately twice the height of th ...

377. Application of Electromodulated Fluorescence to the Study of the Dynamics of Alexa 488 Fluorophore Immobilized on a Gold Electrode
Topic: Bioscience & Health
Published: 5/16/2000
Authors: L. Li, Curtis W Meuse, Vitalii Ivanovich Silin, Adolfas Kastytis Gaigalas, Y. Z. Zhang
Abstract: Alexa 488 fluorophores was immobilized on a gold electrode. The formation of the layer of fluorophore was followed in real time using surface plasmon resonance (SPR). Both SPR and spectroscopic ellipsometry (SE) gave a thickness {of about} 0.7 nm for ...

378. Oxidative DNA Damage; Mechanisms of Product Formation and Repair By Base-Excision Pathway
Topic: Bioscience & Health
Published: 5/1/2000
Author: M Miral Dizdar
Abstract: Free radicals such as OH, e^daq^- and H atoms react with DNA by addition to bases or abstraction of H atoms from the sugar moiety. Oxygen adds to base or sugar radicals of DNA resulting in formation of peroxyl radicals. DNA radicals further react ...

379. Human Mitochondrial Genetics
Topic: Bioscience & Health
Published: 1/1/2000
Authors: L A. Tully, Barbara C. Levin
Abstract: The field of human mitochondrial genetics has advanced way beyond where the Human Genome Project hopes to be by the year 2003, the projected year for completing the sequence of the entire human nuclear DNA genome. Not only has the mitochondrial DNA ...

380. Mapping Oxidative DNA Damage and Mechanisms of Repair
Topic: Bioscience & Health
Published: 1/1/2000
Authors: H Rodriguez, T. O'Connor, S. A. Akman

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