Mangaiyarkarasi Ravirajan
@sbvu.ac.in
Emeritus Scientist- UGC Fellow CIDRF
Sri Balaji Vidyapeeth deemed University
A qualified Biology) professional with over 38 years of rich experience in Teaching and Educational Planning, Administration, Academic and Research as Professor, Principal, C.K.N.College, Cuddalore and Controller of Examinations, Thiruvalluvar University, Vellore. Successful external and internal grant applicant for research and peer-reviewed publications. Was associated with an inter-disciplinary research team and conducting joint research in CIDRF, SBV University, Puducherry as Emeritus Scientist- UGC- Fellow.
Actively involved in supervising, managing, planning & development as well as associated with the academic institutions as an extension work. Well versed at delivering lectures and possess knowledge of teaching & nurturing research students. Result oriented team leader with excellent communication with interpersonal and team- building a positive outlook to challenges and able to manage priorities. Providing community service to the general public
EDUCATION
2002 Ph.D - Marine Biology - Annamalai University - Highly Commendable
1996 M.Ed - Education - Annamalai University - 1st Class
1994 B.Ed- Education - Annamalai University – 1Ind Class
1979 M.Phil - Botany - Annamalai University - 1st Class
1977 M.Sc - Botany - Annamalai University - 2nd Class
1975 B.Sc - Botany - Madras University - 2nd Class
2010 PG Diploma - Computer Applications - Bharat Sevak Samaj - 1st Class
2011 M.A - Yoga for Human Excellence - Bharathiyar University - 1st Class
2020 PG Diploma – Guidance and Counselling- Annamalai University- 1st Class
RESEARCH, TEACHING, or OTHER INTERESTS
Multidisciplinary, Plant Science, Aquatic Science, Biotechnology
Scopus Publications
Scopus Publications
N Korbee, NP Navarro, M García-Sánchez, PSM Celis-Plá, E Quintano, MS Copertino, A Pedersen, R Mariath, N Mangaiyarkarasi, Á Pérez-Ruzafa,et al.
Inter-Research Science Center
Previous studies of the impact of increased CO2 on macroalgae have mainly been done in laboratories or mesocosm systems, placing organisms under both artificial light and seawater conditions. In this study, macroalgae were incubated in situ in UV-transparent cylinders under con- ditions similar to the external environment. This system was tested in a short-term study (5.5 h incu- bation) on the effect of 2 partial pressures of CO2 (pCO2): air (ambient CO2) and the pCO2 predicted by the end of the 21st century (700 µatm, high CO2), on photosynthesis, photosynthetic pigments and photoprotection in calcifying (Ellisolandia elongata and Padina pavonica) and non-calcifying (Cystoseira tamariscifolia) macroalgae. The calcifying P. pavonica showed higher net photosynthesis under high CO2 than under ambient CO2 conditions, whereas the opposite occurred in C. tamarisci- folia. Both brown algae (P. pavonica and C. tamariscifolia) showed activation of non-photochemical quenching mechanisms under high CO2 conditions. However, in P. pavonica the phenol content was reduced after CO2 enrichment. In contrast to phenols, in E. elongata other photoprotectors such as zeaxanthin and palythine (mycosporine-like amino acid) tended to increase in the high CO2 treatment. The different responses of these species to elevated pCO2 may be due to anatomical and physiological differences and could represent a shift in their relative dominance as key species in the face of ocean acidification (OA). More in situ studies could be carried out to evaluate how macroalgae will respond to increases in pCO2 in a future OA scenario. The in situ incubator system proposed in this work may contribute towards increasing this knowledge.
PSM Celis-Plá, B Martínez, E Quintano, M García-Sánchez, A Pedersen, NP Navarro, MS Copertino, N Mangaiyarkarasi, R Mariath, FL Figueroa,et al.
Inter-Research Science Center
Short-term ecophysiological and biochemical responses of Cystoseira tamariscifolia and Ellisolandia elongata to changes in solar irradiance and nutrient levels were analyzed in situ in oligotrophic coastal waters by transferring macroalgae collected at 0.5 and 2.0 m depth and exposing them to 2 irradiance levels (100 and 70% of surface irradiance) and nutrient conditions (nutrient-enriched and non-enriched). Both species were affected by changes in irradiance and nutrient levels. Few interactive effects between these 2 physical stressors were found, suggesting major additive effects on both species. C. tamariscifolia collected at 0.5 m and exposed to 70% irradiance had the highest maximal electron transport rate (ETRmax), saturated irradiance (EkETR) and chl a content and the lowest antioxidant activity. Under the same conditions, E. elongata had increased EkETR, antheraxanthin and β-carotene content. At 100% irradiance, C. tamariscifolia collected at 2.0 m had higher maximal quantum yield (Fv/Fm), photosynthetic efficiency (αETR), ETRmax, maximal non-photochemical quenching (NPQmax), saturation irradiance for NPQ (EkNPQ), and antheraxanthin and polyphenol content increased, whereas in E. elongata only αETR increased. In nutrient-enriched conditions, phenolic compounds, several carotenoids and N con- tent increased in C. tamariscifolia at both depths. E. elongata from 2.0 m depth at 100% irradiance and nutrient-enriched conditions showed increased N content and total mycosporine-like amino acids (MAAs). Our results show rapid photophysiological responses of C. tamariscifolia to varia- tions in in situ irradiance and nutrient conditions, suggesting efficient photoacclimation to envi- ronmental changes. In E. elongata, Fv/Fm and ETRmax did not change in the transplant experiment; in contrast, N content, pigment and MAAs (biochemical variables) changed. The responses of these macroalgae to nutrient enrichment indicate oligotrophic conditions at the study site and environmental stress.
RECENT SCHOLAR PUBLICATIONS
GRANT DETAILS
• Conference funding for“Health and Natural products in Indian system of medicine”July, 2019, by Indian Council of Medical Research, India. INR 1,00,000/
• Conference funding for“Health and Natural products in Indian system of medicine”July, 2019, by Science and Engineering Research Board,DST. India .INR 75000.
• “Screening and characterization of potential larvicidal agents from marine plants against dengue vector mosquito Aedesaegypti” (Prevalent in Puducherry region) 2016-2017 Funded by the Department of Science and Technology and Environment, Puducherry INR 55000
• Emeritus Fellow- University Grants Commission, India, 2015-2017 Central Inter Disciplinary Research Facility, MGMCRI Campus, Puducherry, India. INR 844000
• Intramural research project (2016 -2018) funded by Sri Balaji Vidyapeeth University. “Anti inflammatory and anti oxidant studies with marine algal extracts using animal models” Central Inter Disciplinary Research Facility, MGMCRI Campus, Puducherry, 250000
• Major Research Project (2010 - 2013) funded by UGC, New Delhi – 2010 - 2013. ”Biodiversity Survey of Coastal Herbs & Medicinal Plants in Cuddalore District after Industrialisation & Tsunami”. INR 310000
• Faculty Development Fellowship from University Grants Commission New Delhi, India to do doctoral research in Centre of Advanced Studies in Marine Biology, Annamalai University- 1999-2001. INR 1300000
RESEARCH OUTPUTS (PATENTS, SOFTWARE, PUBLICATIONS, PRODUCTS)
• No- 202041021762 A; Title of the invention- Oral Cleansing Agents Containing Silver Nano Particles Ulva sp (Marine algae)
• No- 201941045682 A: Title of the invention- Oral Cleansing Agents Containing Selenium Particles Derived from Ulva sp (Marine algae)
• CBR No- 27397: Title- Bio-Larvicides for the control of Dengue vector from
marine algae.
• CBR NO- 27400: Title- Marine Substitute for bone resorption by Halimeda
macroloba. (Provisional patent filed)
SOCIAL, ECONOMIC, or ACADEMIC BENEFITS
• Associated with Lions Clubs International for the past 25 years.
• Awarded Melvin Jones Fellowship by Lions Clubs International Foundation.
• Acted as District Chair Person, Zone Chair Person, President and Secretary in Lions clubs International.
• Conducted Eye Camp, Dental camp and General Health Camps in different Villages in Cuddalore district.
• Awarded appreciation Certificate by the Vice Chancellor of MahatmaGandhi Medical College and Research Institute for Handed over the will of self Body donation to medical education.
• Render Service at the time of Tsunami and Thane cyclone joining with the Lions Clubs International.
• Giving Guidance and Counseling to the women folks and Creating awareness of readily available medicinal plants to women in Coastal Villages.