| The skin undergoes continual renewal but injury from the sun can upset the renewal process and produces premature aging as well as skin cancer. |
| In the absence of melanin, the ascorbic acid undergoes metal-catalyzed autoxidation. |
| Each sensor of the array undergoes a reversible change in electrical resistance when exposed to a vapor or analyte. |
| An American pressure group is trying to get Quorn off the shelves while it undergoes official tests. |
| It has also been made crystal clear by health authorities in the past that the blood which is donated undergoes a screening process. |
| In fact, the original policy can be improved as the organization undergoes an iterative process of interpretation, conflict, and refinement. |
