| Sabre | Kais | North Carolina State University | United States | Chemistry | Quantum Computing | worldtopscientists.com |
| Saad | Aljlil | King Abdullaziz City for Science and Technology | Saudi Arabia | Chemical Engineering | Water treatment and seawater desalination | worldtopscientists.com |
| S. M. Moazzem | Hossen | Department of Pharmacy, University of Chittagong | Bangladesh | Pharmacology, Toxicology and Pharmaceutical Science | Natural Product | worldtopscientists.com |
| S. Joseph | Antony | University of Leeds | United Kingdom | Chemical Engineering | Granular Mechanics | worldtopscientists.com |
| S Anita | Shanthi | Annamalai University | India | Mathematics | Fuzzy sets and systems | worldtopscientists.com |
| Rupjyoti | Neog | Sardar Patel University, Anand, Gujarat | India | Agricultural and Biological Sciences | Sustainable chemistry | worldtopscientists.com |
| Rovina | Kobun | Food Security Research Lab, Faculty of Food Science and Nutrition, Universiti Malaysia Sabah, 88400, Kota Kinabalu, Sabah, Malaysia. | Malaysia | Agricultural and Biological Sciences | Postharvest | worldtopscientists.com |
| Rosa María | Martínez-Espinosa | University of Alicante | Spain | Biochemistry, Genetics and Molecular Biology | Biochemistry-Health Sciences | worldtopscientists.com |
| Rongliang | Jia | Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences | China | Environmental Science | Ecology/Biological soil crusts/Prevention and control of desertification | worldtopscientists.com |
| Romoke Grace | Akindele | Hebei University of Technolgy | China | Engineering | Electronics Science and Technology | worldtopscientists.com |
| Romeo | Flores | GeoSciTech Energy Resources | United States | Energy | Environmental Science; Earth and Planetary Science | worldtopscientists.com |
| María Angélica | Ouellette | Lakeland Agricultural Research Association | Canada | Agricultural and Biological Sciences | Weed Science | worldtopscientists.com |
| RODRIGO | FABRI | FEDERAL UNIVERSITY OF JUIZ DE FORA | Brazil | Pharmacology, Toxicology and Pharmaceutical Science | PRODUTOS NATURAIS | worldtopscientists.com |
| Roberto | Simoni | Federal University of Santa Catarina | Brazil | Engineering | Robotics | worldtopscientists.com |
| Roberto | Berni Canani | UNiversità degli Studi di Napoli Federico II Napoli Italia | Italy | Immunology and Microbiology | pediatria | worldtopscientists.com |
| Robert | Clarke | University of Oxford | United Kingdom | Medicine and Dentistry | Epidemiology and Population Health | worldtopscientists.com |
| Ritu | Tanwar | NIT Uttarakhand | India | Engineering | Artificial intelligence | worldtopscientists.com |
| risto | kosonen | Aalto University | Finland | Engineering | HVAC and ventilatio | worldtopscientists.com |
| Rim | Bourgi | Strasbourg university | France | Dentistry | Esthetic and Prosthetic Dentistry | worldtopscientists.com |
| Rima | Isaifan | Cambridge C University | Qatar | Environmental Science | Air pollution and human health | worldtopscientists.com |