J
John Michael Ramsey
Researcher at University of North Carolina at Chapel Hill
Publications - 103
Citations - 5460
John Michael Ramsey is an academic researcher from University of North Carolina at Chapel Hill. The author has contributed to research in topics: Mass spectrometry & Ion trap. The author has an hindex of 35, co-authored 103 publications receiving 5330 citations. Previous affiliations of John Michael Ramsey include Oak Ridge National Laboratory.
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Generating electrospray from microchip devices using electroosmotic pumping.
TL;DR: A method of generating electrospray from solutions emerging from small channels etched on planar substrates is described and the principles that regulate the fluid delivery are described and demonstrated.
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Open channel electrochromatography on a microchip
TL;DR: In this article, a glass microchip having a channel with a cross section of 5.6 [m]m high and 66 [mu]m wide was fabricated using standard photolithographic and etching techniques and the surface of the channel was chemically modified with octadecylsilane to function as the stationary phase for open channel chromatography.
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Integrated Microdevice for DNA Restriction Fragment Analysis
TL;DR: An integrated monolithic device that performs an automated biochemical procedure is demonstrated that mixes a DNA sample with a restriction enzyme in a 0.7-nL reaction chamber and injects the fragments onto a 67-mm-long capillary electrophoresis channel for sizing.
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Microfabricated porous membrane structure for sample concentration and electrophoretic analysis.
TL;DR: A microfabricated injection valve incorporating a porous membrane structure is reported that enables electrokinetic concentration of DNA samples using homogeneous buffer conditions followed by injection into a channel for electrophoretic analysis.
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Microchip electrophoresis with sample stacking
TL;DR: A fused quartz microchip with a serpentine column geometry is fabricated to perform rapid microchip electrophoresis of dansylated amino acids and a stacking injection technique is used to enhance the detection limits.