THE DIAZO REACTION.

Iv. the Diazo Reaction in Urine

The Diazo Reaction of Bilirubins and Phycorubins: A Quantitative Study*

A quantitative study o f the diazo reaction has been made with several bilirubins including a 2,3dihydrobilirubin and several phycorubins. The latter have been prepared from the integral phycocyanin of two cyanobacteria (Mastigocladus laminosus and Spirulina platensis), and from the phycocyanin subunits. These phycorubins have been subjected to the diazo reaction in order to test for the presen...

A comment on the fractional indirect diazo reaction.

Laurence and Abbott (1956) published a description of a micro-method for the estimation of serum bilirubin by the indirect diazo reaction. They indicated that two patterns of colour development are obtainable with foetal and adult sera from cases of severe haemolytic disease due to Rh incompatibility and from obstructive jaundice due to blockage of the common bile duct from carcinoma of the hea...

Ultramicro method for serum bilirubin by diazo blue reaction.

ROPER CLINICAL MANAGEMENT of infants with erythroblastosis fetalis necessitates the determination of total serum bilirubin. Of the many modifications of the original diazo reaction on blood serum (1) a micromethod using capillary blood is preferable. One tenth miffiliter of serum was used by Davidson et al. (2) in their modification of the Ernst and F#{246}rster (3) method and by With (4, 5) in...

On the Nature of the Reaction between Diazo- Tized Sulfanilic Acid and Proteins

It has been generally assumed since the work of Pauly (6) and of Inouye (5) that the reactivity of proteins with diazo compounds is due to the imidazole group of hiitidine and the phenyl group of tyrosine. There are, however, several indications that these are not the only groups concerned in the reaction. Thus, Hooker and Boyd (4) found that casein coupled with diazoarsanilic acid contained ap...