Ultraviolet spectroscopy of Persei

Ultraviolet Detection of Interstellar Co and the Co Isotopomeric Ratios toward X Persei

We report the detection of fully resolved absorption lines of A–X bands from interstellar CO and CO, through high-resolution spectroscopy of X Persei with the Space Telescope Imaging Spectrograph. The first ultraviolet measurement of an interstellar CO column density shows that its isotopomeric ratio is CO/CO p . Simultaneously, the second ultraviolet detection of interstellar CO establishes it...

Ultraviolet Detection of Interstellar 12 C 17 O and the CO Isotopomeric Ratios toward X Persei

We report the detection of fully resolved absorption lines of A−X bands from interstellar CO and CO, through high-resolution spectroscopy of X Per with the Space Telescope Imaging Spectrograph. The first ultraviolet measurement of an interstellar CO column density shows that its isotopomeric ratio is CO/CO = 8700 ± 3600. Simultaneously, the second ultraviolet detection of interstellar CO establ...

Optimal Wavelength Selection in Ultraviolet Spectroscopy for the Estimation of Toxin Reduction Ratio during Hemodialysis

Introduction The concentration of substances, including urea, creatinine, and uric acid, can be used as an index to measure toxic uremic solutes in the blood during dialysis and interdialytic intervals. The on-line monitoring of toxin concentration allows for the clearance measurement of some low-molecular-weight solutes at any time during hemodialysis.The aim of this study was to determine the...

Deep-ultraviolet cavity ringdown spectroscopy.

The sensitive optical detection technique of cavity ringdown spectroscopy is extended to the wavelength range 197-204 nm. A novel design narrowband Fourier-transform-limited laser is used, and the technique is applied to gas-phase extinction measurements in CO2, SF6, and O2. Further demonstration of the system capabilities is given in high-resolution recordings of the Schumann-Runge (0, 0), (1,...

Ultraviolet Photoelectron Spectroscopy of Organic Anions