"study proposed that" is correct and usable in written English.
It is generally used to refer to a specific study's conclusion or finding. For example, "A recent study proposed that climate change is having a significant effect on sea turtle populations."
The Vine-Matthews study proposed that magnetic anomalies of the Mid-Ocean Ridge were caused by a combination of reversals of the earth's field & seafloor spreading.
Second, the study proposed that the impact of KMC would be stronger on innovation performance under high levels of ED.
This study proposed that OH− formation caused by the dissociation of H2O molecules may explain enhanced carbonation.
The study proposed that species richness of family Fagaceae is higher at subtropical regions than at tropical or temperate regions in East Asia (Liao and Chen 2015).
Contrary to the present consensus among fossil primate experts, however, the new study proposed that Darwinius was closely related to early anthropoid primates.
The study proposed that CdS quantum dots' cytotoxicity is mediated by intracellular ROS production, cadmium ions (Cd2+) release and GSH depletion [204].
The INDEPTH-III study proposed that the lower lithosphere of the Indian plate subducts northward at a larger angle (Zhao et al., 2004).
This study proposed that inner membrane opening during the burr-hole evacuation of a CSDH was not a risk-adding but, apparently, a recurrence-preventing one.
Second, a prior study proposed that no one-to-one correspondence occurs between any frequency component of brain activity and pain [77].
Finally, our study proposed that H. pylori strains with partially deleted cagPAI were less likely to cause severe diseases in comparison with those carrying intact cagPAI.
The study proposed that at least 10 of the 18 birds should have their IUCN threat levels elevated.
