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The Washington Ornithological Society is for all those interested in the birds of Washington State in the US. Its website is aimed primarily at birdwatchers and provides information on joining the Society, details of forthcoming field trips and conferences, and checklists of bird species in the state. Details of rare ...

Species 2000 is a federation of database organisations aiming to create an array of global species databases covering each of the major groups of organisms, with each database covering all known species in the group within a consistent taxonomic system. Established by the International Union of Biological Sciences (IUBS) in ...

This project to map macromycetes in Norway is a cooperation between the Norwegian Mycological Society and the Norwegian Ethno-Botanical Society. You can search for fungal records in the combined project and herbarium database. A list of the fully digitalized species in this database is also provided. Fact sheets for selected ...

The Hummingbird Society was founded in 1996 to promote international understanding and the conservation of hummingbirds. Its website includes colour photographs, FAQs (covering the bird's unusual hovering flight, their natural predators, feeding to attract them and their brilliant iridescent colours) and a section on the treatment of injured birds. Also ...

The website for the Hawaiian Ecosystems at Risk Project (HEAR) has provided this online version of the IUCN species Survival Commission Occasional Paper no.27, the proceedings of the international conference on eradication of island invasives held in 2002. The full texts for 53 papers which are accessed through links in ...

The RSPB (Royal Society for the Protection of Birds) Society website has provided this online bird guide to species on the red, amber and green lists of conservation, with some introduced species, in the United Kingdom. The guide can be browsed by name or family. The page for each bird ...

The cercarial transmission seasons of Schistosoma mansoni in the Nile Delta area were determined by 3 methods: (1) monthly cercarial infection rates in Biomphalaria alexandrina, (2) monthly numbers of infected snails collected by means of a uniform sampling method, and (3) monthly cercarial output and monthly numbers of infected snails ...

The results of a 5-year study on the distribution and ecology of Bulinus truncatus in Khuzestan, south-western Iran, are described. Live snails were found in 4 foci, namely, the main focus, the upper Karun River, the lower Karkheh River, and the Bala Rud watershed; in addition, dead snails were found ...

Spermiogenesis in chicken has been examined in order to see whether the radical changes observed in cell shape can be related to the presence of cytoplasmic microtubules. A highly ordered array of tubules has been found which surrounds the nucleus as it elongates from a sphere to a slender cylinder. ...

Studies of crosses of different strains of C. p. molestus in widely separated countries have given very similar results: crosses between certain combinations may be fully fertile or partly sterile.In the Melbourne area of Australia, molestus x fatigans hybrids are common during summer and autumn; a similar situation occurs in ...

The sarcoplasmic reticulum of the frog's sartorius muscle was examined by electron microscopy following sequential fixation in glutaraldehyde and osmium tetroxide and embedding in Epon. The earlier results of Porter and Palade on Ambystoma muscle were confirmed in the sartorius. In addition, the transverse tubules were observed to be continuous ...

The levels of susceptibility of C. p. fatigans larvae from four different localities in Malaya to DDT, dieldrin, malathion, fenthion, diazinon and Sevin have been studied; their toxicity was: diazinon > fenthion > malathion > dieldrin > DDT > Sevin.Larvae from different localities showed a wide range of susceptibility to ...

Two unknown radioactive areas appeared after radioautography and two dimensional paper chromatography of culture medium in which Escherichia coli was grown. These materials were studied by paper chromatography and paper electrophoresis of several derivatives and identified as ethionine and ethionine sulfone, the latter an artifact. Chromatographic coincidence of the unknowns ...

A NEW ASSESSMENT ACTIVITY IN RELATION TO THE WHO/UNICEF BCG VACCINATION PROGRAMME IS DESCRIBED IN THIS REPORT: according to a detailed plan special field teams collect data on tuberculin sensitivity to determine how efficiently children are being selected for vaccination and to appraise the allergy produced by the mass vaccinations. ...

Electron micrographs are presented of synaptic regions encountered in sections of frog sympathetic ganglia and earthworm nerve cord neuropile. Pre- and postsynaptic neuronal elements each appear to have a membrane 70 to 100 A thick, separated from each other over the synaptic area by an intermembranal space 100 to 150 ...