Comparative study on the activity of 5'-nucleotidase 5-nt and gamma glutamyl transferase [GGT] in some tissues of donkeys, calves and goats [the effect of freezing and thawing] [with one table and 2 figures]

5'-nucleotidase [5'-NT] and Gamma glutamyl transferase [GGT] activity was measured in the tissues of four 2-6 years old donkeys; four 6-9 month old castrated male goats and four 6-9 month old male calves. In donkeys the lung is the richest source of the enzyme 5'-NT, whereas in goats the liver contains a higher activity of the enzyme compared with other species. Generally the values of 5'-NT activities in tissues of calves and goats are higher than those of donkeys. GGT is mainly located in the kidneys, pancreas and liver of all the species studied. 20-25% loss in activity of GGT occurred after thawing and freezing of tissues for 2 weeks whereas more than 50% loss in activity of the enzyme occurred in four weeks period. The fall in the activity of 5'-NT in tissues was not consistent in all tissues during the first two weeks, but after four weeks period 50% loss of activity was observed

Colorimetric and titrimetric determination of cefotaxime sodium in bulk powder and pharmaceutical formulations

Two procedures were adopted for determination of cefotaxime sodium in its pure and dosage forms. In the first procedure cefotaxime sodium was treated with sodium nitrite [1%, 1 ml] in the presence of hydrochloric acid [0.5%, 1 ml]. The developed red color exhibits an absorption maximum at 505 nm. Linear correlations were obtained between the absorbance of nitroso product and drug concentration over the range 80-240 mug ml-1. Upon rendered the medium alkaline with sodium hydroxide solution [1%, 1 ml], the red color was changed into violet color. The produced violet color has an absorption maximum at 563 nm and linearity in the range 80-160 mug ml-1 of cefotaxime sodium. In the second method, the utility of N-bromosuccinimide [NBS] and N-chlorosuccinimide [NCS] in estimation of cefotaxime sodium has been investigated. The study of reaction conditions revealed that, l mole of cefotaxime sodium reacts with 3 moles of NBS or NCS. The optimum time for complete the reaction was found to be 20 minutes. The method permits the determination of 1.5913 mg of cefotaxime sodium