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  1. Plant Growth Regulators: Whatever Turns You on (1991 Video)

    Producer
    Pam Taylor
    Subject
    Biology
    Distribution
    Off-air recording licence Sale, Videocassette. Standard formats. col. 24 min., 1998 sale: £145.00 (+VAT +p&p)

    Two studies examine factors that regulate plant growth. Phototropism is the growth of a plant stem towards the light. The validity of the Cholodney-Went theory of phototropism is considered in the light of...

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  2. Plants and the Earth’s Gravity (1974 Film)

    Subject
    Biology
    Distribution
    Film (16mm)

    Stop-motion techniques are used to show the germination of a bean. Shows the effect of removal of the root tip. Discusses theories of plant growth, and describes the behaviour of plants in space.

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  3. Green Machines (1993 Video)

    Producer
    Philip Ashby
    Subject
    Agriculture; Biology
    Distribution
    Off-air recording licence, Videocassette. VHS. col. 24 min.

    Food production is a highly technical business. This programme looks at long-term sustainability in farming. Looks at the basic scientific principles of plant growth - the balance between nutrient and energy...

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  4. Heating Up the Earth: The ‘Greenhouse Effect’ (1985 Video)

    Subject
    Environmental science
    Distribution
    Sale, Videocassette. VHS. col.

    Explains the processes underlying the greenhouse effect including an analysis of chlorofluorocarbons (CFCs) and methanes. Examines the consequences of global warming and the evidence that it is already...

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  5. Green Machines / Nitrate in Drinking Water (1994 Video)

    Subject
    Environmental science
    Distribution
    Off-air recording licence Sale, Videocassette. Standard formats. col. 49 min., 1998 sale: £195.00 (+VAT +p&p)

    [See individual programme entries for synopses.]

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  6. Problem with Ions, A (1991 Video)

    Producer
    John Stratford
    Subject
    Biology
    Distribution
    Off-air recording licence Sale, Videocassette. Standard formats. col. 24 min., 1998 sale: £145.00 (+VAT +p&p)

    Dust from the Chernobyl nuclear accident reached Britain in April 1986, but some areas of the Cumbrian uplands were still radioactive in the autumn of 1990. This runs counter to the early predictions: what...

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