AN IMPROVED METHOD OF DETERMINING METHEMOGLOBIN

An improved flame-photometric method for determining calcium in serum.

Powell (1953) introduced a method for the estimation of serum calcium using the EEL flame photometer, and claimed that it gave results in good agreement with a standard titrimetric procedure. In this laboratory, both these methods were found to give low results when tested against standard sera, prepared by adding known amounts of calcium to serum completely decalcified by treatment with a cati...

An improved ultrafiltration method for determining free testosterone in serum.

In this method, we use the Amicon MPS-1 centrifugal ultrafiltration device and the YMB membrane in measuring free testosterone in serum. Two independent assays are combined: total testosterone and the ultrafiltrable fraction of added [3H]testosterone. The unbound fraction is determined in 0.15-0.5 mL ultrafiltrates of 0.6 to 1 mL of variably diluted serum that has been equilibrated with [3H]tes...

An improved HPLC method for determination of colocynthin in colocynth

Background and objectives: Colocynthin is the major active secondary metabolite of colocynth, Citrullus colocynthis (L.) Schrad, which has been used in traditional and ethno medicine of many countries.  It could be considered as an active marker for quality control of colocynth and its herbal products. Analysis and standardization of colocynth and its herbal preparations are a critical...

Improved Method for Determining the n-Value of HTS Bulks

The complete penetration magnetic field BP is the main feature of a superconducting pellet submitted to an axial applied magnetic field. The electric E-J characteristics of HTS bulk is generally described by a power law E(J) = EC(J/JC)n. The influence of the n-value and applied magnetic field rise rate Vb on the BP of a HTS cylindrical pellet has been presented in a previous paper. The numerica...

An improved procedure for determining thromboplastin generation.