The scientists at lawrence livermore lab have been able to produce 6 new, synthetic elements. why isn't there yet a practical use for these elements?

The elements synthesized in  Lawrence Livermore's lab have no practical use because they degraded just after their formation.

Explanation:

As the nucleus of an atom become too heavy it loses its stability. To gain stability the nucleus starts losing the nucleons ( neutron and proton) via different types of radioactive decay.

The elements synthesized in  Lawrence Livermore's lab are too heavy to bear their stability went to decay just after its origin.

Therefore, we can say that elements synthesized in  Lawrence Livermore's lab have no practical use because they degraded just after their formation.

For more details, you can refer to the link:

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the cytokine-activated janus kinase (jak)-signal transducer and activator of transcription (stat) pathway has an important role in the control of immune responses. dysregulation of jak-stat signaling is associated with various immune disorders.

i think its the first one