Ceylon Journal of Science (Biological Sciences)
Permanent URI for this collectionhttps://dl.nsf.gov.lk/handle/1/7565
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Item The genus Axinandra - Melastomataceae. a missing link in Myrtales?(University of Peradeniya. Peradeniya, 1972) Meijer, W.Item Emilia (Compositae) in ceylon(University of Peradeniya. Peradeniya, 1972) Fosberg, F.R.Item Critical notes on the compositae of Ceylon(University of Peradeniya. Peradeniya, 1972) Grierson, A.J.C.Item Histidine decarboxylation in the Halophile Dunaliella salina(University of Peradeniya. Peradeniya, 1972) Wickramasinghe, R.H.; Le Gal, Y.Item On some aspects of the parasites of Ceylonese fresh water crabs(University of Peradeniya. Peradeniya, 1972) Kannangara, D.W.W.Item A review and revision of the systematics of the genera Hydroides and Eupomatus together with an account of their phylogeny and Zoogeography(University of Peradeniya. Peradeniya, 1972) Pillai, T.G.Item A New Marine ARGULUS (Copepoda, Branchiura)(University of Peradeniya. Peradeniya, 1959) Kirtisinghe, P.Item Trimen's taxonomy and a revised handbook to the flora of Ceylon(University of Peradeniya. Peradeniya, 1998) Cramer, L.H.Item Cell suspension cultures of Musa. cv embul (AAB), mondan (ABB) and kolikuttu (AAB)(University of Peradeniya. Peradeniya, 1998) Hirimburegama, K.Three explants (shoot tip, anthers and fruit pulp) of three cultivars of Musa were tested for callus production under different culture conditions and for the development of cell cultures from the callus. It was observed that callus is produced from all three explants of the tested cultivars, both in liquid and semi-solid, under different culture conditions. There was a variation in the morphology of callus and the type of cells in culture. It could be revealed that factors, namely, the explant, growth regulators and light affect the cell types in suspesion, irrespective of the cultivar. Shoot tip of all 3 cultivars produced an embryogenic callus an cell cultures while fruit pulp and anthers produced callus and cell cultures with predominantly parenchyma.Item Bioaccumulation of heavy metals in relation to body length of Oreochromis mossambicus(University of Peradeniya. Peradeniya, 1998) Wijesinghe, M.R.; Jayatunga, Y.N.A.; Hewamanne, R.The nature of the relationship between bioaccumulation of heavy metals and body size (length) in Oreochromis mossambicus from Beira Lake and Weras Ganga in the Colombo District of Sri Lanka was inverstigated. The work was carried out during March - July 1995. The organs; muscle, gills, gonad, kidney and liver were investigated. Analysis was done by the x-ray fluorescence method. There was a significant difference (p0.05) in the metal levels in a paricular organ between the different length classes. A positive ans statistically significant correlation with body length was seen for Cu concentration in the kidney in both the Beira Lake and Weras Ganga samples. A significant positive correlation with body length was observed for Zn in the gill and kidney, and for Fe in the muscle and liver, of the Beria LAke sample. For Cd in the muscle, a significant negative correlation with length was observed in the Beria Lake sample. This is noteworthy since the muscle is the tissue that is normally consumed. In the same site there was also accumulation of lead in one of the smaller size classes.