Sucrose can be hydrolyzed by sucrase to produce glucose under acidic conditions, which is catalyzed by glucose oXidase to produce hydrogen peroXide. In the presence of HRP (horse radish peroXidase), hydrogen peroXide reacts with the fluorescent probe to form red fluorescent substance. The sucrose content can be calculated by measuring the fluorescence intensity at the eXcitation wavelength of 535 nm and the emission wavelength of 590 nm.
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Dilutions
The optimalsampling volume are different for differentspecies, the SOD also are different for different samples. It is recommended totake 2~3 samples to do a pre-experiment, diluting a series of diluent anddetermine the dilution factor when the SOD inhibition ratio is 15%~55% ( the optimal inhibition ratio is the range of 25%~45% ) before formal experiment.The recommended dilution factor for different samples is as follows (for reference only): Sample type Dilution factor, Mouse serum 5-10, Rat serum 6-15, Urine 2-3, Human hydrothorax 2-3, 10% Mouse liver tissue homogenate 100-200, 10% Mouse brain tissue homogenate 20-30, 10% Mouse kidney tissue homogenate 50-120, 10% Rat kidney tissue homogenate 50-120, HepG2 cells (5.21mgprot/mL) 15-25, Cell culture supernatant 1. Note: The diluent is normalsaline (0.9% NaCl).