Faculty of Technologyhttp://dr.lib.sjp.ac.lk/handle/123456789/54942026-01-07T06:17:33Z2026-01-07T06:17:33ZUrea-silica nanohybrids with potential applications for slow and precise release of nitrogende Silva, M.Siriwardena, D.P.Sandaruwan, C.Priyadarshana, G.Karunaratne, V.http://dr.lib.sjp.ac.lk/handle/123456789/118212022-08-29T07:20:28Z2020-01-01T00:00:00ZUrea-silica nanohybrids with potential applications for slow and precise release of nitrogen
de Silva, M.; Siriwardena, D.P.; Sandaruwan, C.; Priyadarshana, G.; Karunaratne, V.
The adoption of nanoparticles as carrier matrices in the production of hybrid functional materials is
futuristic in agriculture applications. In this study, a greener, modified in-situ sol-gel route was employed
to synthesize urea-silica nanohybrids with a high urea loading of 36% (w/w) and a loading efficiency of
~83%. Characterization studies indicated the successful incorporation of urea into silica nanoparticles and
the formation of strong bonds between the nanoparticles and urea molecules without any substantial
modification to the structure and morphology of silica nanoparticles. Aforesaid observations were further
corroborated by the slow and sustained release behavior exhibited by nanohybrids in water for more
than ten days. The developed urea-silica nanohybrids could be utilized as a potential candidate for
slow-release nitrogen fertilizers.
2020-01-01T00:00:00ZUrea -hydroxypatite nanohybrid as an efficient nutrient source in Camellia sinensis (L.) Kuntze (tea)Raguraj, S.Wijayathunga, W.M.S.Gunarathne, G.P.Amali, R.K.A.Piyadarshana, G.http://dr.lib.sjp.ac.lk/handle/123456789/118202022-08-29T07:16:51Z2020-01-01T00:00:00ZUrea -hydroxypatite nanohybrid as an efficient nutrient source in Camellia sinensis (L.) Kuntze (tea)
Raguraj, S.; Wijayathunga, W.M.S.; Gunarathne, G.P.; Amali, R.K.A.; Piyadarshana, G.
2020-01-01T00:00:00ZProtective Effect of Coconut Oil Meal Phenolic Antioxidants against Macromolecular Damage: In Vitro and In Vivo StudyKarunasiri, A. N.Senanayake, C. M.Hapugaswatta, H.Jayathilaka, N.Seneviratne, K. N.http://dr.lib.sjp.ac.lk/handle/123456789/118172022-08-29T04:43:36Z2020-01-01T00:00:00ZProtective Effect of Coconut Oil Meal Phenolic Antioxidants against Macromolecular Damage: In Vitro and In Vivo Study
Karunasiri, A. N.; Senanayake, C. M.; Hapugaswatta, H.; Jayathilaka, N.; Seneviratne, K. N.
Coconut oil meal, a cheap by-product of coconut oil production, is a rich source of phenolic antioxidants. Many age-related
diseases are caused by reactive oxygen species- (ROS-) induced damage to macromolecules such as lipids, proteins, and DNA. In
the present study, the protective effect of the phenolic extract of coconut oil meal (CMPE) against macromolecular oxidative
damage was evaluated using in vitro and in vivo models. Sunflower oil, bovine serum albumin (BSA), and plasmid DNA were used
in the in vitro study, and thiobarbituric acid reactive substances (TBARS), protein carbonyl, and nicked DNA were evaluated as
oxidation products. )e inhibitory effect of CMPE against H2O2-induced macromolecular damage was evaluated using cultured
HEp-2 cells. )e results indicate that CMPE inhibits macromolecular damage both in vitro and in vivo. In addition, CMPE
regulates redox status of HEp-2 cells under oxidative stress conditions by maintaining higher reduced glutathione levels. )ere
was no significant difference in the expression of glutathione peroxidase in stressed and unstressed cells suggesting that CMPE
regulates the cellular oxidative stress responses without affecting the expression of oxidative stress response genes. Oral feeding of
Wistar rats with CMPE improves the serum and plasma antioxidant status without causing any toxic effects.
2020-01-01T00:00:00ZEmerging investigator series: Synthesis of Magnesium Oxide Nanoparticles Fabricated on Graphene Oxide Nanocomposite for CO2 Sequestration at Elevated TemperaturesGunathilake, C. A.Ranathunge, G. G. T. A.Dassanayake, R.S.Illesinghe, S. D.Manchanda, A.S.Kalpage, C. S.Rajapakse, R. M. G.Karunaratne, D. G. G. P.http://dr.lib.sjp.ac.lk/handle/123456789/118162022-08-29T04:35:45Z2020-01-01T00:00:00ZEmerging investigator series: Synthesis of Magnesium Oxide Nanoparticles Fabricated on Graphene Oxide Nanocomposite for CO2 Sequestration at Elevated Temperatures
Gunathilake, C. A.; Ranathunge, G. G. T. A.; Dassanayake, R.S.; Illesinghe, S. D.; Manchanda, A.S.; Kalpage, C. S.; Rajapakse, R. M. G.; Karunaratne, D. G. G. P.
2020-01-01T00:00:00Z