Title of article :
Near-Infrared Observations of BL Lacertae Host Galaxies
Author/Authors :
Cheung، C. C. نويسنده , , Urry، C. Megan نويسنده , , Scarpa، Riccardo نويسنده , , Giavalisco، Mauro نويسنده ,
Issue Information :
روزنامه با شماره پیاپی 1 سال 2003
Abstract :
Urinary excretion of uric acid was found to be extremely low in a 58-year-old female patient with alcaptonuria. This was due to interference with the uricase-peroxidase method used, because analysis using high-performance liquid chromatography (HPLC) showed a normal urinary concentration of uric acid. In vitro experiments demonstrated that a high concentration of homogentisic acid in the patientʹs urine inhibited the peroxidase reaction, possibly due to inhibition of the colour development of 3-methyl-N-ethyl-N-((beta)-hydroxyethyl)aniline (MEHA) and 4-aminoantipyrine, via the peroxidase reaction. A homogentisic acid concentration equivalent to that in plasma did not affect the uricase-peroxidase reaction. This result suggests that any assay based on a peroxidase method is affected by a high urinary concentration of homogentisic acid in patients with alcaptonuria.
Keywords :
BL Lacertae objects , Structure , galaxies , elliptical and lenticular, cD , fundamental parameters , general
Journal title :
Astrophysical Journal
Journal title :
Astrophysical Journal