"much existing research" is correct and usable in written English.
It can be used to refer to research that has already been completed and documented. For example, "Much existing research has shown a strong correlation between physical activity and good health."
Much existing research (the authors' starting-point) alleges a need for urgency but the claim is not entirely convincing.
New Caledonian crows in New Zealand fashion hooks from twigs to capture food.While much existing research has focused on showing that these avian Einsteins use creative methods to solve complex tasks, surprisingly little is known about the limits to which their tiny brains can be pushed.
Much existing research has addressed the voltage control problem by using distributed resources.
This paper proposes the adoption of the feminist theory of the 'ethic of care' to synthesize and explain much existing research on women's experience of public space.
While much existing research in the area of Simultaneous Localization and Mapping (SLAM) focuses on issues related to uncertainty in sensor data, our work focuses on the problem of planning optimal exploration strategies.
As discussed above, much existing research has focused on barriers to children's adherence.
Three years later, he wrote "The Shrinking of America" (1983), which questioned much of the existing research on psychotherapy and its usefulness.
None of the four cells in the table supports this idea.From poorer to richerSo much for the existing research.
Much of the existing research, compilations of data sets, and policy work is organized along regional lines.
Much of the existing research in the development of anticancer therapeutics from the plants has been focused on investigating the molecular mechanism by which an agent induces cytotoxicity and apoptosis in cancer cells.
In terms of model implications, much of the existing research focuses on single fields or single countries, which does not reflect the global supply pattern, so it is not relevant to allow oil-consuming nations to develop strategic plans.
