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You searched on: Topic Area: Life Sciences Research

Displaying records 181 to 190 of 273 records.
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181. Differential Surface Stress of a Tin Oxide Electrode
Topic: Life Sciences Research
Published: 4/1/2000
Authors: Gintaras Valincius, Vytautas Reipa
Abstract: Differential surface stress measurements performed using estance technique and simultaneous measurements of the differential capacitance provide experimental evidence for deviation of n-tin oxide electrode's properties from the electrocapillary relat ...

182. Interrogating Unsupported Lipid Bilayers With Scanning Confocal Single-Molecule Fluorescence Microscopy
Topic: Life Sciences Research
Published: 1/23/2000
Authors: D L. Burden, John J Kasianowicz
Abstract: We describe the use of scanning confocal fluorescence microscopy to probe the structure and temporal dynamics of unsupported planar lipid bilayer membranes. At high fluorescent label concentration, the shape and stability of the membranes are evalua ...

183. Surface stress of tin oxide electrode
Topic: Life Sciences Research
Published: 1/1/2000
Authors: Gintaras Valincius, Vytautas Reipa

184. Thermal Stability of PNA/DNA and DNA/DNA Duplexes by Differential Scanning Calorimetry
Topic: Life Sciences Research
Published: 12/15/1999
Authors: M C. Chakrabarti, Frederick P. Schwarz
Abstract: Thermodynamic quanties describing the hybridizatin reactions for 8mer PNA/DNA duplexes and the corresponding 8mer DNA/DNA duplexes were determined by isothermal titation calorimetry measurements at ambient temperatures. Values of {delta}G^db^ for ...

185. Long-lifetime Lipid Rhenium Metal-ligand Complex for Probing Membrane Dynamics on the Microsecond Timescale
Topic: Life Sciences Research
Published: 12/1/1999
Authors: L. Li, F N Castellano, I Gryczynski, J R Lakowicz

186. Mapping Oxidative DNA Damage and Mechanisms of Repair
Topic: Life Sciences Research
Published: 12/1/1999
Authors: H Rodriguez, T O'connor, S. A. Akman

187. Microsecond time-scale discrimination among polycytidylic acid, polyadenylic acid, and polyuridylic acid as homopolymers or as segments within single RNA molecules
Topic: Life Sciences Research
Published: 12/1/1999
Authors: M Akeson, D Branton, John J Kasianowicz, E Brandin, D W Deamer
Abstract: Single molecules of DNA or RNA can be detected as they are driven through a single alpha-hemolysin channel by an applied electric field. During translocation, nucleotides within the polynucleotide must pass through the channel pore in sequential sin ...

188. The Effect of Experimental Conditions on the Levels of Oxidatively Modified Bases in DNA as Measured by Gas Chromatography- Mass Spectrometry. How Many Modified Bases Are Involved? Prepurification or Not?
Topic: Life Sciences Research
Published: 12/1/1999
Authors: S. Senturker, M Miral Dizdar

189. Challenges in Capturing Oxygenase Activity In Vitro
Topic: Life Sciences Research
Published: 11/1/1999
Authors: V L. Vilker, Vytautas Reipa, M P. Mayhew, Marcia J Holden
Abstract: Biocatalysis using oxygenase or desaturase enzymes has the potential to add value to native fats and oils by adding oxygen hydroxyl groups, or double bonds to create regio- and/or stereospecific products. These enzymes are a subset of the large clas ...

190. Heteronuclear NMR and Crystallographic Studies of Wild-Type and H187Q Escherichia Coli Uracil DNA Glycosylase: Electrophilic Catalysis of Uracil Expulsion by a Neutral Histidine 187
Topic: Life Sciences Research
Published: 9/14/1999
Authors: A C Drohat, G Xiao, M Tordova, J. Jagadeesh, K Pankiewicz, K A Watanbe, G L. Gilliland, J T. Stivers
Abstract: The nature of the putative general acid, His187, in the reaction catalyzed by Escherichia coli uracil DNA glycosylase (UDG) was investigated using X-ray crystallography and NMR spectroscopy. The crystal structures of H187Q UDG, and its complex with ...

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