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- B. R. Levin, F. M. Stewart, Valerie A Rice
- Plasmid
- 1979

- J. F. Kidwell, Michael T. Clegg, F. M. Stewart, Tyler M Prout
- Genetics
- 1977

The equilibrium structure of models of differential selection in the sexes is investigated. It is shown that opposing additive selection leads to stable polymorphic equilibria for only a restrictedâ€¦ (More)

- Lasse StÃ¦rdal Simonsen, D M Gordon, F. M. Stewart, B. R. Levin
- Journal of general microbiology
- 1990

We describe a method for determining the rate parameter of conjugative plasmid transfer that is based on single estimates of donor, recipient and transconjugant densities and the growth rate inâ€¦ (More)

- B. R. Levin, Mark Lipsitch, +5 authors F. M. Stewart
- Clinical infectious diseases : an officialâ€¦
- 1997

Mathematical models are used to ascertain the relationship between the incidence of antibiotic treatment and the frequency of resistant bacteria in the commensal flora of human hosts, as well as theâ€¦ (More)

- F. M. Stewart, B. R. Levin
- Genetics
- 1977

A mathematical model for the population dynamics of conjugationally transmitted plasmids in bacterial populations is presented and its properties analyzed. Consideration is given toâ€¦ (More)

- Barbara Eden, R F Debo, +5 authors William Constable
- Cancer
- 1994

BACKGROUND
Esthesioneuroblastoma is a rare tumor arising from olfactory epithelium. This retrospective review analyzed the patterns of failure and long term outcome of patients withâ€¦ (More)

- F. M. Stewart, Rustom Antia, B. R. Levin, Mark Lipsitch, John E. Mittler
- Theoretical population biology
- 1998

The phenomenon of antibiotic resistance is of practical importance and theoretical interest. As a foundation for further studies by simulation, experiment, and observation, we here develop aâ€¦ (More)

- B. R. Levin, F. M. Stewart
- Genetics
- 1980

A mathematical model for the population dynamics of nonconjugative plasmids that can be mobilized by conjugative factors is presented. In the analysis of the properties of this model, primaryâ€¦ (More)

- F. M. Stewart, D. R. Thompson, Robert W. Furness, N. Harrison
- Archives of environmental contamination andâ€¦
- 1994

Mercury, cadmium, zinc, and copper concentrations were analyzed in three samples of common guillemot (in April, June, and November). Levels measured were uniformly low, and not enough to have anyâ€¦ (More)

- B. R. Levin, J. J. Bull, F. M. Stewart
- Mathematical biosciences
- 1996

A method derived from demographic theory is presented for modeling the epidemiology of an infectious disease. For long-term infections, this method better accounts for host variation in survival andâ€¦ (More)