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  • 1
    Electronic Resource
    Electronic Resource
    The Control and Monitoring of Discharges by Biological Techniques (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 6 (1992), S. 0 
    Details
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Traditionally, the control of discharges to UK surface waters has been achieved using a chemical-specific approach. There are, however, benefits in also applying toxicity-based consents to effluents of complex composition.This paper describes the approach to direct toxicity assessment of discharges being developed by the Water Research Centre for and with, the National Rivers Authority.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.1992.tb00751.x
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  • 2
    Electronic Resource
    Electronic Resource
    The Distribntion and Abondance ot Parasitaphelenchus oldkami, a Nematode Parasite of Scolytus scolytus and S. multistriatus, the Bark Beetle Vectors of Dutch Elm Disease (1974)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 23 (1974), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: In 1971 and 1972 populations of Scolytus scolytus (F.) in several counties in England were heavily parasitized by Parasitaphelenchus oldhami Rühm, but in S. multistriatus (Marsh.) P. oldhami was markedly less abundant. Infestation of S. scolytus was 54 per cent in 1971 and 61 per cent in 1972, while the mean number of parasites per infested beetle was 32 and 41 respectively. For S. multistriatus the comparable figures were 55 per cent in 1971 and 44 per cent in 1972 with means of 12 and 10 parasites per beetle. Despite the high levels of parasitism, no pathological effects on the beetles were observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1974.tb01835.x
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  • 3
    Electronic Resource
    Electronic Resource
    Sampling Common-sense (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Teaching statistics 11 (1989), S. 0 
    Details
    ISSN: 1467-9639
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mathematics
    Notes: This article reports on a novel approach to teaching ideas of sampling to college students studying Urban Regional Planning.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-9639.1989.tb00063.x
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  • 4
    Electronic Resource
    Electronic Resource
    Teaching Statistics with the Aid of a Microcomputer (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Teaching statistics 8 (1986), S. 0 
    Details
    ISSN: 1467-9639
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-9639.1986.tb00634.x
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  • 5
    Electronic Resource
    Electronic Resource
    Fatty acid changes during development of zygotic and microspore-derived embryos of Brassica napus (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 81 (1991), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Cultured microspores of Brassica napus L. cvs Topas and Reston initiated cell divisions within 3 to 4 days, and globular, heart and torpedo shaped embryos were prevalent after approximately 6, 8, and 10 days, respectively. Embryos with rudimentary cotyledons were evident within 2 weeks, but those that reached this stage of development represented only 1–5% of the original microspore population. The fresh weight of microspore-derived embryos at all stages of development was significantly greater than that for zygotic embryos, but the pattern of change in fresh weight and fatty acid accumulation was similar in developing zygotic and microspore embryos. In freshly isolated microspores of both Topas (low erucic acid) and Reston (high erucic acid), the predominant fatty acid was 18:3, while 18:1 comprised less than 15% of total fatty acids. During development in both zygotic and microspore embryos, the level of 18:3 declined markedly while 18:1 rapidly increased. Erucic acid (22:1) was not detected in the early stages of embryogenesis in Reston. However, small amounts of 22:1 appeared by early cotyledonary stage and the level gradually increased in both zygotic and microspore embryos through the later stages of development. The fatty acid compositions of mature embryos was nearly identical to that of dry seed, except the level of 22:1 in Reston embryos was consistently less than in the seed. Triacylglycerols comprised only 15% of total lipids in freshly isolated microspores, but increased to more than 90% by 4 weeks. The fatty acid composition of the triacylglycerol fraction was generally similar to that of total lipids at all stages of development of microspore-derived embryos.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1991.tb05083.x
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