o-Phenylenediamine Free Base is a peroxidase substrate suitable for use in ELISA procedures. The substrate produces a soluble end product that is orange-brown in color and can be read spectrophotometrically at 450 nm. The OPD reaction may be stopped with 3 N HCl or 3 M H 2 SO 4 and read at 492 nm.
If a person is issued a ticket for an accident in Minnesota, it  will stay on his or her driving record for five years. However, if  the accident was alcohol related, depend â¦ ing on the charge, it can  stay longer. 1 person found this useful.
How long do my violations stay on my driving record? Most violations stay on for 5 years; DWI-related violations stay on for 10 years. Minor violations stay on your record for 3 years. If you're not sure what's on your record, consider ordering your driving record today. Are traffic ticket fines the same throughout the state? No. Fines vary by court, as do court costs. How can I find a lost traffic ticket online? You can't. You must contact your court to get a copy of your lost traffic ticket or retrieve information from the ticket.