| Prof Dr | Dalia | Saleh | National Research Centre | Egypt | |
| Dr | Daniel | Uzbelger Feldman | Temple University Kornberg School of Dentistry | United States | |
| Dr | Danqin | Wang | Chinalco company | China | |
| Dr | Daryoush | Sanaei | Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran | Iran | |
| Dr | Daryoush | Sanaei | Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran | Iran | |
| Mr | DAVID | MUGISHA | HIGH SCHOOL | Rwanda | |
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| Prof Dr | Deliang | Zhang | Qilu Institute of Technology | China | |
| Dr | DEVADOSS | ISSAC | BISHOP HEBER COLLEGE, TRICHY - 620017 | India | |
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| Assoc Prof Dr | Dhananjay | Yadav | University of Nizwa | Oman | |
| Assoc Prof Dr | Dhananjay | Yadav | University of Nizwa | Oman | |
| Assoc Prof Dr | Dhananjay | Yadav | University of Nizwa | Oman | |
| Assoc Prof Dr | Dhananjay | Yadav | University of Nizwa | Oman | |
| Mr | Dhaval | Patel | Polymer Competence Center Leoben | Austria | |
| Assoc Prof Dr | Dheerendra Singh | Yadav | Ch Charan singh P G College Heonra Saifai Etawah-206001 | India | |
| Assist Prof Dr | Dheyaa | Jasim | Al-Amarah University Collage | Iraq | |
| Dr | DHONDIRAM TUKARAM | SAKHARE | Shivaji Art's, Comm. & Science College Kannad Dist. Chhatrapati Sambhajinagar Maharashtra India | India | |
| Assist Prof Dr | Dhrubajyoti | Neog | Dibrugarh University | India | |
| Mr | Di | Ran | Shenyang Urban Construction University | China | |