'conducted many research' is correct and can be used in written English.
For example: "During his career, Dr. Smith conducted many research projects to improve understanding of the disease."
He has conducted many research projects and has pioneered work on DNA flow cytometry, image morphometry, mono-layered cytology and cytomorphologic findings of various lesions on cytology smears.
In addition to his teaching experience, he has conducted many research projects on geology, anthropic geomorphology, and oceanography and has served as an expert consultant for national and international organisations, mostly in Spain and Colombia.
We conducted many research studies, which led to major scientific epidemiological results.
Dr. Tolan has conducted many research studies on youth development, programs to affect youth development and prevention problems, with funding from NIH, CDC, and several foundations Among these are programs to support families to protect healthy development in high risk communities, He has published over 150 articles and chapters and 6 books.
As research of intrapartum interventions reporting stillbirth as a primary or secondary outcome is rarely conducted, many research gaps exist, making this an important area for future research (Table 11).
The Ontario government has conducted many researches and programs to help people adapt to the effects that are already being experienced, as well as the future effects of climate change (Baldwin et al. 2000).
Takagi conducted many technical research projects, and wrote extensively on nuclear issues, environmental protection and peace, with special emphasis on the fight against the nuclear threat, as well as in support of human rights.
NASA conducted many in-house research-and-development projects at its numerous space centres.
Researchers undertaking doctoral or other research degrees conducted many of the sub-studies as they simultaneously developed research skills desirable for professionals living and or working with remote and Aboriginal populations.
Nielsen, a pioneer in usability research, conducted many important studies on usability of websites, addressing theories, methods, practice, and other aspects of usability [ 13, 20, 21 ].
Over 5 subsequent years, scientists and locals carried out several seasons of field research and conducted many workshops and outreach activities.
