1.   But such rules do not necessarily assure a sterile environment.

2.   Denver microbiologist John Gerdes testified earlier this month that PCR works well in sterile environments, but could falter with evidence collected at messy crime scenes.

3.   For the next three years, our visits with one another outside the sterile environment of a hospital room were rare.

4.   That approach has moved from a high-tech, sterile environment to a more cozy, humane approach to delivery.

5.   They began to bombard him with antibiotics, inside and out, keeping him in a sterile environment and changing his bandages daily.

6.   For that very reason, tissue culture needs to be worked in a sterile environment.

7.   It also means providing a sterile environment in the beginning.

8.   Microbiologist John Gerdes testified earlier this month that PCR works well in sterile environments but could falter with evidence collected at messy crime scenes.

9.   The transplant also eliminates the need for chemotherapy or sterile environments after birth, she said.