1. Peroxidase has been assayed by a chronometric method involving the coupled reaction of ascorbic acid with the product of the enzymic action on benzidine. 2. Measurements of the activities of horseradish and tea peroxidase by this and two other methods, involving respectively pyrogallol and o-dianisidine, are compared. 3. It is claimed that the chronometric method is relatively simple, rapid ...

Microsomal enzyme preparations from dog liver, kidney, and bladder were used to assess the prostaglandin H synthasecatalyzed activation of carcinogenic aromatic amines to bind covalently to proteins and nucleic acids. Benzidine, a urinary bladder carcinogen, bound to protein of bladder transitional epithelial and renal inner and outer medullary microsomes and was dependent upon addition of arac...

Acetone fractionated peroxidase from crude extract of Brassica oleracea leaves (Cabbage) was purified in three steps on chromatographic columns, using Sp-Sepharose, DEAE-Sepharose and Con A-Sepharose. The specific activity of purified main isoenzyme (BOC-POD) is 1887 u/mg protein with RZ: 3.1, which is 172 times more than the RZ of crude extract with 4.3% recovery. The molecular weight of BOC-P...

acetone fractionated peroxidase from crude extract of brassica oleracea leaves (cabbage) was purified in three steps on chromatographic columns, using sp-sepharose, deae-sepharose and con a-sepharose. the specific activity of purified main isoenzyme (boc-pod) is 1887 u/mg protein with rz: 3.1, which is 172 times more than the rz of crude extract with 4.3% recovery. the molecular weight of boc-p...

The phenolic Schiff bases I-VI were synthesized by condensation reactions between various diamines, namely o-dianisidine, o-tolidine and ethylenediamine with vanillin or p-hydroxybenzaldehyde and subsequent reactions between these phenolic Schiff bases and epichlorohydrin to produce new diglycidyl ethers Ia-VIa. The structures of these compounds were confirmed by CHN, FT-IR, (1)H-NMR, and (13)C...

I F NO INTRAVASCULAR liberation of intracellular hemoglobin occurs with the transfusion of thawed, recOllstituted frozen erythrocytes, the amount of free supernatant hemoglobin in units of frozen blood that may be infused without producing henioglobinuria is determined principally by the recipient’s plasma llenloglobin-billdillg capacity (1, 2). Oweii et al. (3) reported a method for quantitati...

The influence of phenol and its derivatives on the kinetics of oxidation of aryldiamines (indicator-substrates) catalyzed by novel plant peroxidase-cationic peanut peroxidase-was studied. The character of influence of phenols on the kinetics of enzymatic oxidation of benzidine, o-dianisidine, and 3,3',5,5'-tetramethylbenzidine (TMB) with hydrogen peroxide was found to depend on a correlation be...

Microsomal enzyme preparations from dog liver, kidney, and bladder were used to assess the prostaglandin H synthasecatalyzed activation of carcinogenic aromatic amines to bind covalently to proteins and nucleic acids. Benzidine, a urinary bladder carcinogen, bound to protein of bladder transitional epithelial and renal inner and outer medullary microsomes and was dependent upon addition of arac...