The phrase "a vital effect" is correct and usable in written English.
It can be used to describe an important or significant impact that something has on a situation or outcome.
Example: "The new policy had a vital effect on employee morale, leading to increased productivity."
Alternatives: "a significant impact" or "an essential influence."
Yet they had a vital effect on many writers because of his elaborate use of language and his constant interest in the hidden sides of a character's personality.
Member enterprises have a vital effect on the stability and system efficiency of an eco-industrial park (EIP), and a selection and control for them is an important part.
The number of tree species had a vital effect on tree size heterogeneity.
It also shows a vital effect in tumor growth and is triggered by chemical signals from tumor cells in a phase of rapid growth [ 58].
The capillary end effect is a vital issue and has a significant influence on the computation of end point relative permeabilities and final saturation levels in core flood experiments.
I don't think he could have got through life being as difficult as he was if he hadn't had a hugely positive and vital effect on the people around him.
This large vital effect corresponds to a ∼ 10 °C signal, when calibrated via surface coral Mg/Ca-temperature relationships, and has the potential to complicate paleoreconstructions. Outside the central band, Mg/Ca ratios increase with decreasing Sr/Ca.
Conversely, earlier data have demonstrated that the natural agent C. verbenacea displayed an anti-inflammatory activity linked to a vital protective effect on the gastric mucosa, and very low toxicity in acute models of experimentation in rats when systemically or topically administered [ 27- 31].
Arnsten and Li suggest that noradrenergic transmission has a vital beneficial effect on PFC function, particularly via postsynaptic alpha-2-adrenoreceptors. Alpha -2 agonists such as guanfacine have been shown to improve working memory performance in monkeys after direct infusion into the dorsolateral PFC [ 75].
And, as McCrum sees it, the "disdain for international agreements" on the part of George W. Bush's administration "had the vital effect of decoupling the English language from what cultural conservatives would always see as American imperialism".
