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Practical Aspects of Yield Investigations of Groundwater Sources (1992)

GROUT, M. W. ; ALEXANDER, D. W. ; SIMPSON, R. J.

Oxford, UK : Blackwell Publishing Ltd

Water and environment journal 6 (1992), S. 0

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ISSN: 1747-6593

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Energy, Environment Protection, Nuclear Power Engineering

Notes: Lee Valley Water plc has, in a joint study with the University of Birmingham, been reassessing the reliable yields of its existing chalk sources in order to make maximum use of the available groundwater resources. An approach to yield assessment was developed which took into account the hydrogeology and flow processes in the vicinity of pumping stations, and within the contributing area. The yield of many sources was found to be very dependent on regional water level conditions. Initial estimates of potential yields were made but future monitoring should aim to clarify the interrelationship between source output and aquifer state.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1747-6593.1992.tb00769.x

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Tolerance of aggressive and non-aggressive isolates of Ceratocystis ulmi to organotin fungicides (1991)

Eng, George ; Acholonu, Alexander D W

New York, NY [u.a.] : Wiley-Blackwell

Applied Organometallic Chemistry 5 (1991), S. 131-134

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ISSN: 0268-2605

Keywords: Ceratocystis ulmi ; fungi ; aggressive and non-aggressive strains ; wild strains ; Dutch elm disease ; organotins ; triphenyltins ; tricyclohexyltin ; fungicide ; Chemistry ; Industrial Chemistry and Chemical Engineering

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: The effect of triorganotin compounds, R3SnX, on the growth of three wild strains of Ceratocystis ulmi (C. ulmi) fungus, two aggressive and one non-aggressive strains, was evaluated in shake culture. In all cases, the triphenyltins were the more effective organotins for the inhibition of C. ulmi in vitro. The anionic group, X, did not have a significant role in the inhibition, suggesting that the species involved in the inhibition is the triphenyltin moiety (Ph3Sn+) or the hydrated triphenyltin moiety (Ph3Sn(H2O)+2). It is further suggested that the triphenyltin species Ph3SnOH and Ph3SnOAc are the preferred compounds for the control of Dutch elm disease. The tolerance of aggressive isolates to fungitoxins appears to depend more on the nature of the fungicide than on the type of fungus.

Additional Material: 1 Tab.