Browsing Botany by Issue Date

Pattern of distribution of selected trace elements in the marine brown alga, Sargassum filipendula Ag. from Sri Lanka

Jayasekera, R. (Kluwer Academic Publishers, 1994)

Baseline concentrations together with biological variations of 29 trace elements (Ag, As, Au, Ba, Br, Cd, Ce, Co, Cr, Cs, Eu, Fe, Hf, I, Mn, Mo, Ni, Pb, Rb, Sb, Sc, Se, Sm, Sr, Tb, Th, Yb, Zn and Zr) were investigated in ...

Intraspecific neighbor effects on the growth and morphological plasticity of Salvinia molesta

Solangaarachchi, S.M.; Hapuarachchi, H.T. (Natural Resources, Energy and Science Authority of Sri Lanka, 1995)

Isolation and characterization of cellulolytic bacteria from decomposing rice straw

Sirisena, D.M.; Manamendra, T.P. (Natural Resources, Energy and Science Authority of Sri Lanka, 1995)

Air pollution monitoring at the Environmental Specimen Bank of Germany: spruce and pine shoots as bioindicators

Rossbach, M.; Jayasekera, R. (Springer-Verlag, 1996)

An investigation has been carried out to study the pattern of heavy metal abundance in buds, needles, twigs and cones from single trees and to compare the results with the integrated (composite, homogenized) ESB material ...

Background levels of heavy metals in plants of different taxonomic groups from a montane rain forest in Sri Lanka

Jayasekera, R.; Rossbach, M. (Kluwer Academic Publishers, 1996)

An undisturbed natural reserve area iocated in a tropical montane rain forest at about 1800 m altitude in Sri Lanka served as a study site to investigate and assess the natural background concentration levels of As, Cd, ...

Use of seaweeds for monitoring trace elements in coastal waters

Jayasekera, R.; Rossbach, M. (Kluwer Academic Publishers, 1996)

Concentrations of a wide range of trace elements: arsenic, cadmium, cobalt, chromium, hafnium, nickel, thorium, uranium, zinc and the rare earth elements, cerium, europium, samarium, terbium and ytterbium were determined ...

A quantitative study of pigmy forest vegetation at 2000 m in Hakgala Strict Natural Reserve

Rathnayake, R.M.W.; Solangarachchi, S.M. (University of Sri Jayawardhanapura, 1998)

A study was made in /996 ofthe composition, abundance, and density oftheflora ofthis type ofpigmyforest. In the overstorey ( 8 cm girth at 20 cm laboveground level) there were recorded /8 species oll3 genera and 8falllilies, ...

Effects of Fusarium moniliforme culture extracts and fumonisin B1 on DNA, RNA and protein synthesis by baby hamster kidney cells

Abeywickrama, K.; Bean, G.A.; Kennedy, K..A. (Springer Netherlands., 1998)

Baby hamster kidney cells (BHK-21) were exposed to culture filtrates of 4 Fusarium moniliforme isolates containing varying levels of fumonisin B1 (FMB1) and the effects upon RNA, DNA and protein synthesis were monitored. ...

Human dependence on mangrove resources and its implications on the management of mangrove ecosystems in Sri Lanka

Amarasinghe, M. (Institute of Biology, Sri Lanka, 1999)

Human influence on structure of mangrove vegetation in Negombo estuary

Perera, K.A.R.S.; Amarasinghe, M.D. (Sri Lanka Association for Fisheries and Aquatic Resources, 1999)

A comparative chemosystematical study of the genus Shorea in Sri Lanka

Perera N I S; Senanayake S P (Proceedings of the sixth Round Table Conference on Dipterocarps, Bangalore, India, 1999)

The genus Shorea of the Dipterocarpaceae family is represented by 15 species in Sri Lanka, of which 13 are endemic. Because of the existence of different classification systems for this genus, proposed by several authors ...

Isolation and identification of fungi from mushroom composts and evaluation their biological activity

Wickremasinghe, R.; Abeywickrama, K.P.; Abeythunga, D.T.U. (1999)

Mangrove vegetation structure and the abundance of shrimps in Chilaw lagoon, Sri Lanka

Jayasundera, J.W.K.K.; Amarasinghe, M.D.; Ranawana, K.B. (Sri Lanka Association for Fisheries and Aquatic Resources, 1999)

Large scale air monitoring: lichen vs. air particulate matter analysis

Rossbach, M.; Jayasekera, R.; Kniewald, G.; Thang, N.H. (Elsevier, 1999)

Biological indicator organisms have been widely used for monitoring and banking purposes for many years. Although the complexity of the interactions between organisms and their environment is generally not easily comprehensible, ...

Marine specimen banking – Archive and pollution control for the 21st century

Rossbach, M.; Jayasekera, R.; Kniewald, G. (Inderscience Publishers, 2000)

The oceans have in the past been extensively used as disposal sites for various kinds of waste. The world ocean – being the final sink for many natural and anthropogenic substances – is a "labile" ecosystem, which is and ...

Large scale air monitoring: Biological indicators vs. air particulate matter

Rossbach, M.; Jayasekera, R.; Kniewald, G. (2000)

Insecticidal and repellent activity of volatile constituents of neem leaf (Azadirachta indica) against Callosobruchus maculatus(L.) inhabiting stored cowpea

Paranagama, P.A.; Adhikari, A.A.C.K.; Abeywickrama, K.P.; Bandara, K.A.N.P. (Sri Lanka Association for the Advancement of Science, 2001)

Bioactivity of the essential oil of Cymbopogon citratus (Lemongrass) on Sitophllus oryzae(L) (Coleoptera : Curcuolionidae) [Rice Weewil]

Paranagama, P.A.; Jayaratne, K.H.T.; Nugeliyadde, L.; Abeywickrama, K.P. (Sri Lanka Association for the Advancement of Science (SLAAS), 2001)

Leaf flavonoids as chemotaxonomic characters in genus Sida L. (Bevila)

Perera, N.I.S.; Senanayake, S.P.; Jayasekera, L.R. (Tropical Agricultural Research, 2001)

Theflavonoid distribution pattern of five species of genus Sida was studied to identify the species since the existing classification was mainly based on morphological and anatomical characters. Four main flavonoids ...

Bioactivity of the essential oil of lemongrass, (Cymbopogon citratus) against rice weevil-Sitophilus oryzae(L.) and grain moth-Sitorroga cerealella (Olivier)

Jayaratne, K.H.T.; Paranagama, P.A.; Nugeliyadde, L.; Abeywickrama, K.P. (Annual Research Symposium, Faculty of Graduate Studies, University of Kelaniya, 2001)

Browsing Botany by Issue Date

Browsing Botany by Issue Date

Search Digital Repository

Browse

All of DSpace

This Collection

My Account