| PPGB | protective protein of beta-galactosidase |
|---|---|
| ROPS | rollover protective structure |
| TCPD50 | 50% tissue culture protective dose |
| PPCA | Protective protein/cathepsin A |
|---|---|
| ROPS | Roll-over protective structures |
| protective zone | The time in the cardiac cycle, immediately following the vulnerable period, during which a second stimulus will prevent the initiation of ventricular fibrillation by a previous stimulus applied during the vulnerable period, probably by blocking a reentrant pathway. (05 Mar 2000) |
|---|---|
| ear protective devices | Personal devices for protection of the ears from loud or high intensity noise, water, or cold. These include earmuffs and earplugs. (12 Dec 1998) |
| eye protective devices | Personal devices for protection of the eyes from impact, flying objects, glare, liquids, or injurious radiation. (12 Dec 1998) |