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.
Points for all traffic tickets stay on a person's record for two  years in Michigan. The two year period starts at the time of  conviction, not from the date the ticket was â¦ written. The reckless  driving charge itself stays on a person's record for at least 7  years, longer if alcohol was involved. Answer   Reckless driving will stay on your criminal record indefinitely, or until it is expunged. The charge will remain on your driving record for five years.