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Now showing items 22761-22770 of 23010
Factors affecting microcomputer use and programming ability of secondary school children
(1987)
A survey was conducted in Hertfordshire to provide information about microcomputer use both in school and at home. All schools were found to possess microcomputers but only a limited number of pupils reported using the ...
Variation in eyespot populations; a field study
(Blackwell Scientific, 1987)
A rain tower and wind tunnel for studying the dispersal of plant pathogens by rain and wind
(1986-12)
The rain tower/wind tunnel complex at Rothamsted consists of a rain tower (height 11 m, cross-section 1 m2) linked to the upwind end of a wind tunnel (length 12 m, cross-section 1 m2), which may be operated in either an ...
A high resolution hydrogen-line survey of Messier 31. III : H I holes in the interstellar medium
(1986-11-01)
An analysis is carried out of H I holes in M 31 as detected with the Westerbork radiotelescope. The holes range from 100-1000 pc across and represent missing masses ranging from 1000-10 million solar masses, which would ...
Molecular characterisation of subgenomic single-stranded and double-stranded DNA forms isolated from plants infected with tomato golden mosaic virus
(1986-10-01)
A subgenomic single-stranded DNA present in particles of the geminivirus, tomato golden mosaic virus, has been shown by electron microscope heteroduplex mapping and Southern hybridisation analysis to consist of circular ...
Factors affecting the germination of Septoria nodorum pycnidiospores
(1986-09)
Most pycnidiospores of Septoria nodorum were released from pycnidia into water in 30 min, more than 50% being released in 10 min. The viability of pycnidiospores in aqueous suspension, assessed by germination on a selective ...
The sequential development of type I and type II ostertagiasis in young cattle with special reference to biochemical and serological changes
(1986-08)
The sequential development of Type I and Type II ostertagiasis over a 2-year period in the same naturally infected cattle is described for the first time. Particular reference is made to biochemical and serological changes. ...
Effects of rainfall intensity and duration on dispersal of Rhynchosporium secalis conidia from infected barley leaves
(1986-06-30)
Simulated rain of two intensities was allowed to fall for 30 min on to barley leaves infected by Rhynchosporium secalis. The resulting splash droplets were collected on horizontal pieces of fixed photographic film. Most ...