  The possibility of finding the measurable maximal energy and the minimal time
interval is discussed in different quantum aspects. It is found that the linear
generalized uncertainty principle (GUP) approach gives a non-physical result.
Based on large scale Schwarzshild solution, the quadratic GUP approach is
utilized. The calculations are performed at the shortest distance, at which the
general relativity is assumed to be a good approximation for the quantum
gravity and at larger distances, as well. It is found that both maximal energy
and minimal time have the order of the Planck time. Then, the uncertainties in
both quantities are accordingly bounded. Some physical insights are addressed.
Also, the implications on the physics of early Universe and on quantized mass
are outlined. The results are related to the existence of finite cosmological
constant and minimum mass (mass quanta).
