An improved assay for the spectrophotometric determination of chondroitinase ABC activity

An improved assay for the spectrophotometric determination of chondroitinase ABC activity

An improved spectrophotometric procedure for the determination of urinary metanephrines.

Spectrophotometric assays for urinary metanephrines are still widely used because of the simple equipment needed. These methods, however, have the major drawback of being very susceptible to interference. Using the original Pisano technique (Pisano, J. J. (1960) Clin. Chim. Acta 5, 406-414) we have often observed overestimation of the metanephrine concentration. By measuring absorbances at thre...

Determination of kinetic constants for peptidyl prolyl cis-trans isomerases by an improved spectrophotometric assay.

The kinetic properties and substrate specificity of two well-characterized peptidyl prolyl cis-trans isomerases (PPIases), cyclophilin and the FK-506 binding protein (FKBP), have been previously examined [Fischer, G., Bang, H., Berger, E., & Schellenberger, A. (1984) Biochim. Biophys. Acta 791, 87-97; Harrison, R.K., & Stein, R.L. (1990) Biochemistry 29, 1684-1689; Albers, M.W., Walsh, C.T., & ...

An improved spectrophotometric assay for monoamine oxidase in mitochondria

other Rhizobium species. Most of these plasmids encoding for fixation and nodulation properties are non-self transmissible. Plasmid profiles were determined for 24 strains of R. trifolii. All the strains harboured at least three plasmids and as many as eight were present in some strains. Southern hybridization with cloned R. meliloti nifgenes was used to identify indigenous Nif plasmids. Each s...

UV Spectrophotometric Assay Method for the Determination of Fluconazole Capsules

A very simple, accurate, rapid and economical UV spectrophotometric method was developed for the estimation of fluconazole. The UV method permits a simple, rapid and economical quantitation of fluconazole in capsule dosage form only. The maximum absorbance of fluconazole was found to be 210 nm. Fluconazole, which is available in Karachi in different brands within the pharmacies, was collected a...