It was observed experimentally for the first time in 1958.

It has been observed experimentally that changes in water level affect the growth of the plant.

In fact the classic rate limiting step has almost never been observed experimentally.

The system is also able to switch between steady states as has been observed experimentally.

The effect was first observed experimentally in 2000, 38 years after its theoretical prediction.

These waves were observed experimentally and certified as a discovery.

He was the first person to experimentally observe atoms.

It also predicts a stress-superposition law which has been observed experimentally.

For long time, molecular rotations could not be directly observed experimentally.

Kaonium has not been observed experimentally and is expected to have a short lifetime on the order of 10 seconds.