James T. Radomski

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The present study demonstrates that a variety of thiazolidine-4-(R)-carboxylic acids (TDs) which are the products of reactions of L-cysteine (cys) with carbonyl compounds could serve as a "delivery" system for cys to the cell. Liberation of the amino acid can occur enzymatically as well as non-enzymatically. The two possibilities have been proven by(More)
Department of Astronomy, University of Florida, Gainesville, Florida 32611, USA Gemini Observatory Northern Operations Center, 670 N. A’ohoku Place, Hilo, Hawaii 96720, USA UK Astronomy Technology Centre, Royal Observatory, Edinburgh EH9 3HJ, UK Gemini Observatory Southern Operations Center, c/o AURA, Casilla 603, La Serena, Chile Cerro Tololo(More)
When viewed in optical starlight scattered by dust, the nearly edge-on debris disk surrounding the A5V star beta Pictoris (distance 19.3 pc; ref. 1) extends farther than 1,450 au from the star. Its large-scale complexity has been well characterized, but the detailed structure of the disk's central approximately 200-au region has remained elusive. This(More)
We present high sensitivity sub-arcsecond resolution images of the Herbig Ae star AB Aurigae at 11.6 and 18.5 μm taken with Michelle on Gemini North. Bright extended dust emission close to the star is resolved at both wavelengths, with quadratically subtracted FWHM of 17±4 AU at 11.6 μm and 22±5 AU at 18.5 μm. Additional, fainter emission is detected out to(More)
We present subarcsecond resolution mid-infrared images at 10.8 and 18.2 μm of Cygnus A. These images were obtained with the University of Florida midIR camera/spectrometer OSCIR at the Keck II 10-m telescope. Our data show extended mid-IR emission primarily to the east of the nucleus with a possible western extension detected after image deconvolution. This(More)
We present diffraction-limited (FWHM ∼ 0.3) Gemini/T-ReCS mid-infrared (MIR: N -band or narrow-band at 8.7μm) imaging of four Luminous Infrared Galaxies (LIRGs) drawn from a representative local sample. The MIR emission in the central few kpc is strikingly similar to that traced by Paα, and generally consists of bright nuclear emission and several compact(More)
2-Substituted thiazolidine-4(R)-carboxylic acids (TD) were found to increase the concentration of non-protein sulphydryls (NPSH) and the activity of rhodanese (thiosulphate sulphurtransferase, EC 2.8.1.1) and 3-mercaptopyruvate sulphurtransferase (EC 2.8.1.2) in mouse liver. These properties suggest TDs are potentially hepatoprotective compounds. However(More)
This work explores in detail the relation between the 8μm and the Paα emissions for 122 H ii regions identified in a sample of 10 low-z LIRGs with nearly constant metallicity (12 + log(O/H) ∼ 8.8). We use Gemini/T-ReCS high-spatial resolution (. 0. 4 ∼ 120 pc for the average distance of 60Mpc of our sample) mid-infrared imaging (at 8.7μm or 10.3μm) together(More)