Female brown-headed cowbirds' (Molothrus ater) social assortment changes in response to male song: a potential source of public information

2002 ◽  
Vol 53 (3) ◽  
pp. 163-173 ◽  
Author(s):  
Julie Gros-Louis ◽  
David J. White ◽  
Andrew P. King ◽  
Meredith J. West
Author(s):  
Abdulai Kuyini Mohammed

This article aims to assess whether or not property rates in Ghana are a good potential source of local revenue. Through detailed analysis of six local government case studies, we find that present prospects for most rural local areas to raise substantial rate revenue are circumscribed, but in urban councils they are more promising. Nevertheless, no council is able to collect rates fully and from all rateable properties. This is attributed to several factors: the politicisation of taxation; ethnic homogeneity; intergovernmental transfers; partisan local government elections; resistance caused by elite design; and the denial of public information. Although these factors have been identified in previous literature, the study includes new findings which challenge received academic thinking on how they affect local tax collection in developing countries.


Author(s):  
Philippe Fragu

The identification, localization and quantification of intracellular chemical elements is an area of scientific endeavour which has not ceased to develop over the past 30 years. Secondary Ion Mass Spectrometry (SIMS) microscopy is widely used for elemental localization problems in geochemistry, metallurgy and electronics. Although the first commercial instruments were available in 1968, biological applications have been gradual as investigators have systematically examined the potential source of artefacts inherent in the method and sought to develop strategies for the analysis of soft biological material with a lateral resolution equivalent to that of the light microscope. In 1992, the prospects offered by this technique are even more encouraging as prototypes of new ion probes appear capable of achieving the ultimate goal, namely the quantitative analysis of micron and submicron regions. The purpose of this review is to underline the requirements for biomedical applications of SIMS microscopy.Sample preparation methodology should preserve both the structural and the chemical integrity of the tissue.


Sign in / Sign up

Export Citation Format

Share Document