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.
Traffic Ticket Points in New York. How long do driving points stay on my record in New York State? Believe it or not, the points you get from receiving a NY traffic ticket will remain on your driving record (i.e. driverâs abstract) for 39 months. For a list of the number of points assigned for speeding in NY click here. However, points will only be cumulative for 18 of those months.