The phrase "a tremendous effect in" is correct and usable in written English.
It can be used when discussing the impact or influence of something in a specific context or area.
Example: "The new policy had a tremendous effect in improving employee morale across the organization."
Alternatives: "a significant impact on" or "a profound influence in".
Exactly how Cort's process differed from the processes that had been developed by earlier ironmasters along the same lines is not known, but his two inventions together had a tremendous effect on the iron-making industry in Britain; in the next 20 years British iron production quadrupled.
"All of the things that are about to play out in the Cheshire case will have a tremendous effect on the death-penalty debate in this state," said State Representative Michael P. Lawlor, a Democrat from East Haven.
Because it has a tremendous effect on a lot of areas in terms of your executive prefrontal cortex -- besides quieting down your emotional brain, which usually leads you into trouble sometimes [laughs], this is actually focusing on your attention level and on your level actually of well-being, which really does take place in these two sides of your brain -- these lobes.
Interestingly, ion-pairing reagent nature present in the sample had a tremendous effect on retention and response intensity.
The circuit court judges, in particular, will have a tremendous effect on the way the nation's laws are interpreted.
Thus, 4-PB has a tremendous effect on the activity of the HDAC activity in pancreatic cancer cells.
It is known that the selection of the culture conditions has a tremendous effect on the morphology and function of epithelial cells in vitro.
By Edward Bally ABIDJAN, Côte d'Ivoire, 18 May 2011 – The on-going political crisis in Côte d'Ivoire has had a tremendous effect on the country's adolescents and children.
Some participants in the process have already begun to warn that what emerges in those early discussions could have a tremendous effect on what will happen.
