Iris (hydroxymethyl) Aminomethane as a Standard for K1eldahI Nitrogen Analysis

Effects of buffers on aspartate aminotransferase activity and association of the enzyme with pyridoxal phosphate.

Using purified enzymes of human origin and patients' sera, we examined factors influencing the in vitro association of pyridoxal phosphate with aspartate aminotransferase (EC 2.6.1.1). The rate of association was markedly retarded by phosphate buffer in comparison with tris(hydroxymethyl)aminomethane or six other buffers. Pyridoxal phosphate at an incubation concentration of 130 mumol/liter rea...

Mineralogy of Martian Atmospheric Dust Inferred from Spectral Deconvolu- Tion of Mgs Tes and Mariner

TION OF MGS TES AND MARINER 9 IRIS DATA. Harry Y. McSween Jr., Victoria E. Hamilton, and Bruce W. Hapke, Department of Geological Sciences, University of Tennessee, Knoxville, TN 37996, [email protected], Hawaii Institute of Geophysics and Planetology, University of Hawaii, Honolulu, HI 96822, [email protected], Department of Geology and Planetary Sciences, University of Pittsburgh, Pittsb...

Studies on lipase-catalyzed asymmetric synthesis of (S)-(hydroxymethyl)glutamic acid (HMG)

(S)-(Hydroxymethyl)glutamic acid was successfully synthesized in total 12 % yield over eight steps from tris(hydroxymethyl)aminomethane hydrochloride (Tris·HCl), employing lipase TL-induced enantioselective acetylation of a prochiral 1,3-diol as the key step.

Inversion analysis of carbon monoxide emissions using data from the TES and MOPITT satellite instruments

Evaluation of ceftazidime contents in antibiotic discs by capillary electrophoresis.

Good quality of antibiotic discs is a fundamental prerequisite to accurate antibiotic susceptibility tests. Capillary electrophoresis (CE) is a widely used method for quantitative analysis. Here, using ceftazidime as an example, we report an easy-to-perform strategy to determine ceftazidime content in discs. First, a serial of ceftazidime standard solutions was prepared to determine the detecti...