The Intact Soil-core Microcosm
Author | : Harvey Bolton (Jr.) |
Publisher | : |
Total Pages | : 16 |
Release | : 1991* |
Genre | : |
ISBN | : |
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Author | : Harvey Bolton (Jr.) |
Publisher | : |
Total Pages | : 16 |
Release | : 1991* |
Genre | : |
ISBN | : |
Author | : Jay D. Gile |
Publisher | : |
Total Pages | : 56 |
Release | : 1979 |
Genre | : Pesticides |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : |
Release | : 1893 |
Genre | : |
ISBN | : |
Author | : Joel Vincent Gagliardi |
Publisher | : |
Total Pages | : 384 |
Release | : 1998 |
Genre | : Microbiological assay |
ISBN | : |
Author | : James M. Witt |
Publisher | : |
Total Pages | : 172 |
Release | : 1977 |
Genre | : Environmental chemistry |
ISBN | : |
Author | : Jay D. Gile |
Publisher | : |
Total Pages | : 0 |
Release | : 1979 |
Genre | : Pesticides |
ISBN | : |
Author | : Julian W.T. Wimpenny |
Publisher | : CRC Press |
Total Pages | : 292 |
Release | : 1988-10-31 |
Genre | : Medical |
ISBN | : 9780849329746 |
These volumes present the main classes of useful laboratory model systems used to study microbial ecosystems, with emphasis on the practical details for the use of each model. The most commonly used model, the homogeneous fermenter, is featured along with linked homogeneous culture systems, film fermenters, and percolating columns. Additionally, gel-stabilized culture systems which incorporate molecular diffusion as their main solute transfer mechanism and the microbial colony are explained. Chapters comparing model systems with "microcosms" are included, along with discussions of the value of computer models in microbial ecosystem research. Highlighted is a global discussion of the value of laboratory models in microbial ecology.
Author | : |
Publisher | : |
Total Pages | : |
Release | : 1991 |
Genre | : |
ISBN | : |
Pacific Northwest Laboratory compared intact soil-core microcosms and the field for ecosystem structural and functional properties after the introduction of a model genetically engineered microorganism (GEM). This project used two distinct microbial types as model GEMs, Gram-negative Pseudomonas sp. RC1, which was an aggressive root colonizer, and Gram-positive Streptomyces lividans TK24. The model GEMs were added to surface soil in separate studies, with RC1 studied throughout the growth of winter wheat (Triticum aestivum), while TK24 was studied throughout a ten month period. Also, RC1 was used in studies conducted during two consecutive field seasons (1988 to 1990) to determine how year-to-year field variability influenced the calibration of microcosms with the field. The main conclusions of this research were that intact soil-core microcosms can be useful to simulate the field for studies of microbial fate and effects on ecosystem structural and functional properties. In general, microcosms in the growth chamber, which simulated average field variations, were similar to the field for most parameters or differences could be attributed to the great extremes in temperature that occurred in the field compared to the microcosms. Better controls of environmental variables including temperature and moisture will be necessary to more closely simulate the field for future use of microcosms for risk assessment. 126 refs., 13 figs., 12 tabs.
Author | : J. SAXENA |
Publisher | : CRC Press |
Total Pages | : 368 |
Release | : 1990-03-01 |
Genre | : Design |
ISBN | : 9781560320241 |
This volume, composed of 6 subject reviews and one chemical case study, is part of a series providing articles about new and significant developments within the broad field of chemical hazard assessment. The series also covers databases, exposure assessment, monitoring analysis and case studies.
Author | : James W. Gillett |
Publisher | : |
Total Pages | : 56 |
Release | : 1978 |
Genre | : Biological models |
ISBN | : |