| Ram | Sagar | Johns Hopkins University | United States | Neuroscience | Genetics, Stem Cell Research | worldtopscientists.com |
| Ramadan | AlShdefat | Jadara University | Jordan | Pharmacology, Toxicology and Pharmaceutical Science | Pharmaceutical Sciences | worldtopscientists.com |
| Ramadevi | Subramani Reddy | Texas Tech University Health Sciences Center El Paso | United States | Health Professions | Cancer Biology | worldtopscientists.com |
| Ramiin | Javahershenas | Urmia University | Iran | Chemistry | organic chemistry | |
| Ramin | Yousefi | Islamic Azad University | Iran | Materials Science | Nanostructures | worldtopscientists.com |
| Rammohan Rao | Makineni | University of wollongong | Australia | Engineering | Electrical Engineering | worldtopscientists.com |
| Ramón | García-Marín | University of Murcia | Spain | Social Sciences | Geography | worldtopscientists.com |
| Rana | Ramadan Fahmy Neiber | Institue of Process Engineering, Chinese Academy of Sciences | China | Environmental Science | Chemical Engineering | worldtopscientists.com |
| Rana Muhammad Amir | Latif | The Center for Modern Chinese City Studies, School of Geographical Sciences, East China Normal University, Shanghai 200062, China. | China | Environmental Science | Human Geography/ Phphysical Geography | worldtopscientists.com |
| raoudha | ben Djemaa | university of sousse | Tunisia | Computer Science | informatique | worldtopscientists.com |
| Raquel | Conceicao | Institute of Biomedical Engineering and Biophysics, Faculty of Sciences, University of Lisbon (Instituto de Biofísica e Engenharia Biomédica, Faculdade de Ciências, Universidade de Lisboa) | Portugal | Engineering | Biomedical Engineering | worldtopscientists.com |
| Rashid | Gholami | Razi University | Iran | Agricultural and Biological Sciences | post harvest technology | worldtopscientists.com |
| Rasool | Sadeghi | Department of electrical engineering, DOL.C. , Islamic Azad University, Isfahan, Iran | Iran | Engineering | Wireless Network Optimization | worldtopscientists.com |
| Ravi | vats | Q32 bio | United States | Biochemistry, Genetics and Molecular Biology | Cell and Molecular biology, Pharmacology | worldtopscientists.com |
| Ravi | Sahu | Wright State University Boonshoft School of Medicine | United States | Pharmacology, Toxicology and Pharmaceutical Science | Oxidized lipid mediators, | worldtopscientists.com |
| Rayan | M.Ameen | University of Duhok | Iraq | Materials Science | Micromechanical Characterization of α/β Ti-6Al-4V Using FIB-Fabricated Micropillars, Nanoindentation, and EBSD | worldtopscientists.com |
| Rayees | Ahmed | University of Kashmir | India | Earth and Planetary Sciences | Geography | worldtopscientists.com |
| razieh | davashi | Islamic Azad University, of Najafabad | Iran | Computer Science | Data mining | worldtopscientists.com |
| Regent Retrospect | Musekwa | Botswana International University of Science and Technology | Botswana | Mathematics | Statistics | worldtopscientists.com |
| RENATO | AMBROSIO, JR | UNIRIO | Brazil | Medicine and Dentistry | Ophthalmology / Refractive Surgery | worldtopscientists.com |