The phrase "activation is needed for" is correct and usable in written English.
It can be used when discussing the requirement of activation for a process, system, or function to operate effectively.
Example: "Activation is needed for the software to run properly on your device."
Alternatives: "activation is required for" or "activation is essential for".
The representation is already partially activated when the second stimulus is encountered, so less additional activation is needed for one to become consciously aware of it.
During transient activation, Erk1/2 remains predominantly cytoplasmic promoting proliferation, whereas its sustained activation is needed for nuclear concentration and results in differentiation.
Thus, for rational application of PI3K pathway-targeted agents, comprehensive information on pathway activation status and mechanisms of activation is needed for specific tumour types.
To investigate whether Notch activation is needed for SPNC cell maintenance, we examined the distribution of SPNC cells in Shh-Cre; N2 f/f and Shh-Cre; N1 +/f; N2 f/f lungs.
ER α activation through AF-1 or through both AF-1 and AF-2 has been shown to promote breast cancer proliferation [ 70]; however, only AF-2 activation is needed for ER α-mediated metabolic regulation.
In fruit-flies, it has also been reported that DA-ergic neurons innervating the mushroom body exhibited enhanced responses to olfactory CS after pairing olfactory CS with electric shock US [ 9], but it is not known whether the activation is needed for memory recall.
It should be noted that even if NMDA receptor activation was needed for obtaining optically defined ER fragments, glutamate treatment in the presence of the NMDA receptor antagonist MK-801 did cause a small but significant increase in τeff.
Furthermore, we wanted to investigate whether caspase activation was needed for the establishment of the G2/M-phase blockade.
Compared to steady-state contractions, much higher levels of neural activation are needed for contractions where torque develops as rapidly as possible.
Finally, it is important to point out that both fibrin formation and platelet activation were needed for inflammation to develop in this model, and the absence of either of the two events abrogated inflammation.
To add to the concern, compared to steady-state contractions, much higher levels of neural activation are needed for contractions where torque develops as rapidly as possible (de Haan 1998; de Ruiter et al. 1999).
