"mainstream topics in" is correct and usable in written English.
It is commonly used in academic or journalistic writing to refer to popular or widely-discussed subjects. Example: Mainstream topics in current political discourse include climate change, immigration policies, and income inequality.
As one of the mainstream topics in the research field of infrastructure application of FRP composites, the near-surface mounted (NSM) fiber-reinforced polymer (FRP) strengthening technique has attracted an increasing attention over the last decade and become an effective alternative to the externally bonded FRP strengthening method.
are the mainstream topics in the study field.
Moreover, health policy and analysis research, health systems and sub-systems research, healthcare and services research, health, epidemiology and economics of communicable and non-communicable diseases, primary care research, health economics and health costs, and pharmacy of hospital have been identified as the mainstream topics in HSR fields.
Religion is not a mainstream topic in development.
Mainstream topics such as the changing shape of the female form are analyzed alongside current issues: ethics in the fashion industry, intelligent textiles, and subcultural dress, for example.
At the open meeting, more mainstream topics are selected, and therefore we may expect these papers to have a larger bearing in immediate clinical practice.
Farrar typically wrote songs about Middle America, while Tweedy wrote about more mainstream topics such as relationships.
This topic is a mainstream issue in the field of ecological economics, but its application to fisheries is rather unexplored, even though fisheries have been the focus of many pioneering studies related to natural resource management.
Although social enterprise is in the early adopter phase, it has become a mainstream topic of conversation around the world.
Design, it seems, is becoming a mainstream topic.
If this is a reaction to increased interest in the environment, the sticking point is that the environment is now a mainstream topic.
