منابع مشابه
Evolution of specialists in an experimental microcosm.
The impact of adaptation on the persistence of a balanced polymorphism was explored using the lactose operon of Escherichia coli as a model system. Competition in chemostats for two substitutable resources, methylgalactoside and lactulose, generates stabilizing frequency-dependent selection when two different naturally isolated lac operons (TD2 and TD10) are used. The fate of this balanced poly...
متن کاملMicroevolution in an electronic microcosm.
The evolution of microbial populations in simple environments such as chemostats is still not fully understood. The classical interpretation of adaptation involves a process of successive substitution whereby a new dominant genotype arises by mutation from the genotype previously dominant and spreads more or less rapidly through the population until it is nearly fixed. The population is, thus, ...
متن کاملModelling the Dynamics of an Experimental Host-Pathogen Microcosm within a Hierarchical Bayesian Framework
The advantages of Bayesian statistical approaches, such as flexibility and the ability to acknowledge uncertainty in all parameters, have made them the prevailing method for analysing the spread of infectious diseases in human or animal populations. We introduce a Bayesian approach to experimental host-pathogen systems that shares these attractive features. Since uncertainty in all parameters i...
متن کاملMicrocosm Study
Abbott (1966) described microcosms as miniaturized ecosystems. Among the oldest and most specialized examples of the microcosm technique were bioassay systems, such as that found in the standard BOD determination. Abbott also noted that, due to the unpredictability and complexity of natural systems, in situ experiment results were often vague and inconclusive, and many researchers had successfu...
متن کاملMICROCOSM: An Open Hypermedia Environment for Information Integration
This report examines open hypermedia systems, and argues that such systems provide users with richer and more diverse ways to access and integrate information from large and dynamic data sets in a distributed, heterogeneous environment. In particular, the enhanced Microcosm model for open hypermedia is examined, and the ways in which it provides such an environment are discussed. The paper cont...
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ژورنال
عنوان ژورنال: School Science and Mathematics
سال: 1911
ISSN: 0036-6803
DOI: 10.1111/j.1949-8594.1911.tb03355.x