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Fiber loop ringdown for physical sensor development: pressure sensor.
A new method of developing optical fiber pressure sensors by use of a fiber loop ringdown scheme is described. The fiber loop ringdown system is characterized in terms of the ringdown baseline… Expand
Measurements of Cavity Ringdown Spectroscopy of Acetone in the Ultraviolet and Near-Infrared Spectral Regions: Potential for Development of a Breath Analyzer
We report a study on the cavity ringdown spectroscopy of acetone in both the ultraviolet (UV) and the near-infrared (NIR) spectral regions to explore the potential for development of a breath… Expand
Fiber ringdown pressure sensors.
An exploratory study on a novel fiber ringdown pressure sensor is presented. With this technique, pressure measurements are achieved in a time domain by measurement of ringdown times. The… Expand
Development of alternative plasma sources for cavity ring-down measurements of mercury.
We have been exploring innovative technologies for elemental and hyperfine structure measurements using cavity ring-down spectroscopy (CRDS) combined with various plasma sources. A laboratory CRDS… Expand
Cavity ringdown measurements of mercury and its hyperfine structures at 254 nm in an atmospheric microwave plasma: spectral interference and analytical performance
The plasma-cavity ringdown spectroscopic (Plasma-CRDS) technique has been demonstrated as a powerful tool for elemental and isotopic measurements in recent studies. This work reports the first… Expand
Periplasmic aggregation limits the proteolytic maturation of the Escherichia coli Penicillin G amidase precursor polypeptide
- S. Scherrer, N. Robas, H. Zouheiry, G. Branlant, C. Branlant
- Biology, Medicine
- Applied Microbiology and Biotechnology
- 1 October 1994
The Escherichia coli penicillin G amidase (PGA), which is a key enzyme in the production of penicillin G derivatives is generated from a precursor polypeptide by an unusual internal maturation… Expand
Measurements of the Weak UV Absorptions of Isoprene and Acetone at 261–275 nm Using Cavity Ringdown Spectroscopy for Evaluation of a Potential Portable Ringdown Breath Analyzer
The weak absorption spectra of isoprene and acetone have been measured in the wavelength range of 261–275 nm using cavity ringdown spectroscopy. The measured absorption cross-sections of isoprene in… Expand
Optical diagnostics of a low power—low gas flow rates atmospheric-pressure argon plasma created by a microwave plasma torch
We employ a suite of optical techniques, namely, visual imaging, optical emission spectroscopy and cavity ringdown spectroscopy (CRDS), to characterize a low power, low gas flow rates,… Expand
Uranium emission spectra with a low power microwave plasma source
Abstract This work presents the first report of uranium spectra generated by a low power microwave plasma source to conduct emission measurements. Distinct uranium peaks in the wavelength range… Expand