Electronic signature applied 10:47 AM

Dr. S. Chen

21 CFR Part 11 compliant e-signature with meaning: "I have reviewed and approve this data."

Data entry locked 10:32 AM

System

Automatic lock after approval workflow completed. SHA-256 hash generated.

Review approved 10:15 AM

Dr. M. Torres

Peer review completed. All data integrity checks passed.

Results table modified 09:48 AM

Dr. S. Chen

Added final concentration data row. Previous version preserved.

Experiment created 09:02 AM

Dr. S. Chen

New experiment from template SOP-0122.