The phrase "are not only effective" is correct and usable in written English.
It is typically used in a comparative context to emphasize that something has multiple positive qualities or effects.
Example: "These strategies are not only effective in increasing productivity, but they also foster a positive work environment."
Alternatives: "are not just effective" or "are not solely effective".
But technologies are not only effective at achieving or thwarting the aims of those who encounter them, but are affective.
Furthermore, GLP-1 peptides are not only effective in modulating insulin-release and achieving glycaemic control in type 2 diabetes, but are also effective in modulating synaptic plasticity.
When researchers have explored the outcome of long-term intensive treatment they have found that these treatments are not only effective but that they are effective in ways not even attempted by the brief therapies.
This might mean combining existing tests to create more effective screening programmes, or looking for new strategies that are not only effective but also appealing enough for people to get tested.
These results suggest that the ligand-anchored liposomal aerosols are not only effective in rapid attainment of high-drug concentration in lung with high population of alveolar macrophages but also maintain the same over prolonged period of time.
The authors of this document make the same point that I opened this article with: Listening to the post-9/11 debate over guidelines for the interrogation of terrorist suspects, one could easily conclude that coercive methods are not only effective, but also substantially more effective than non-coercive methods in obtaining actionable intelligence from resistant sources.
Four monkeys produced this way from Mitalipov's 2009 experiment remain healthy, showing the process is "not only effective but also has no side effects," he said.
Minority communities want policing that is not only effective, but sensitive, compassionate and respectful of constitutional guidelines.
Consequently, the addition of MWCNTs is not only effective in improving the mechanical stiffness but also toughness of the composites.
Furthermore, based on our analysis, RSSA is not only effective but also quite efficient compared to related studies.
