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Preface Acknowledgements 1. The ecological context 2. Pollution and pollutants 3. The significance of pathways 4. Changes in environment 5. The effects of pollution on targets 6. Target exposure,… (More)
An electrically small offset reflector antenna (operating at 5.3 GHz) with very low sidelobes is presented. The antenna is envisaged for use in a transportable earth-based transponder for calibration… (More)
N-(Phosphonacetyl)-L-aspartic acid (PALA) is an antitumor agent which is currently under clinical study. A gas chromatography--mass spectrometry--selected ion monitoring assay procedure using… (More)
OCCURRENCE of edaphic ecotypes, particularly in relation to nutritional factors, is well known1–5. Within Agrostis tenuis interest has centred around populations tolerant of heavy metals which occur… (More)
THE more usual methods of soil extraction and chemical analysis are not entirely applicable to assessment of the potential of unburnt colliery spoil as a medium for plant growth. This is particularly… (More)
Plantes Alimentaires de I'Ouest AfricainEtude Botanique, Biologique et Chimique. Par F. Busson, avec la collaboration technique de P. Jaeger, P. Lunven et M. Pinta. Pp. 568. (Marseille: Laboratoires… (More)
The Negev: The Challenge of a Desert. By Michael Evenari, Leslie Shanan and Naphtali Tadmor. Pp. x + 345. (Harvard University: Cambridge, Massachusetts; Oxford University, London, July 1971.) £7.25.