SYMPOSIA PAPER Published: 01 January 1999
STP15811S

Population Growth Kinetics of Exposed to Selected Electrophiles

Source

This study describes the effects of two selected electrophilic chemicals on the population growth kinetics of the freshwater ciliate Tetrahymena pyriformis (strain GL). The two chemicals selected, 3-butyn-2-one and trans-2-nonenal, each have a polarized, α,β-unsaturated moiety, which is associated with the electrophilic mechanism of Michael-type addition. T. pyriformis populations exposed to both electrophiles exhibited concentration dependent death of the initial inoculum within 1 to 2 h. Three-butyn-2-one which has a low 1-octanol-water partition coefficient (log Kow = -0.89) exhibited greater toxicity with death observed at 0.068 mg/L. Death was first observed in the morehydrophobic, trans-2-nonenal (log Kow = 3.16) at 4.21 mg/L. Death was followed by recovery of the population at the growth rates similar to control populations without chemical exposure.

Author Information

Bearden, AP
Waste Management Research and Education Institute, The University of Tennessee, Knoxville, Tennessee, USA The University of Tennessee, Knoxville, Tennessee, USA
Sinks, GD
College of Veterinary Medicine, The University of Tennessee, Knoxville, Tennessee, USA
Schultz, TW
Waste Management Research and Education Institute, The University of Tennessee, Knoxville, Tennessee, USA College of Veterinary Medicine, The University of Tennessee, Knoxville, Tennessee, USA
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Details
Developed by Committee: E47
Pages: 319–328
DOI: 10.1520/STP15811S
ISBN-EB: 978-0-8031-5408-7
ISBN-13: 978-0-8031-2618-3