| 1 | Identification and evaluation of low cost adsorbents for defluoridation of water | |
| Researcher: | Rayappan, S | |
| Guide: | Prakash, P | |
| University: | Madurai Kamraj University | |
| Language: | English | |
| Shodhganga | ||
| 2 | Development and implementation of a multimedia package to teach biology to std xii students | |
| Researcher: | Irudayam, Rayappan | |
| Guide: | Goel, D R | |
| University: | Maharaja Sayajirao University of Baroda | |
| Language: | English | |
| Shodhganga | ||
| 3 | Financial appraisal and prediction of sickness in Indian cotton textile mill industry | |
| Researcher: | Rayappan, E K | |
| Guide: | Kandasami, K P | |
| University: | Bharathiar University | |
| Language: | English | |
| Shodhganga | ||
| 4 | ||
| Researcher: | Arul Rayappan, I | |
| Guide: | Marimuthu, K | |
| University: | The Gandhigram Rural Institute | |
| Language: | English | |
| Shodhganga | ||