Control questing

In the quest for better methods of establishing the environmental safety (or otherwise) of chemicals, interest has grown in the use of microcosms and meso-cosms—artificial systems in which the effects of chemicals on populations and communities can be tested in a controlled way, with replication of treatments. Mesocosms have been defined as bounded and partially enclosed outdoor units that closely resemble the natural environment, especially the aquatic environment (Crossland 1994). Microcosms are smaller and less complex multispecies systems. They are less comparable with the real world than are mesocosms. Experimental ponds and model streams are examples of mesocosms (for examples, see Caquet et al. 2000, Giddings et al. 2001, and Solomon et al. 2001). The effects of chemicals at the levels of population and community can be tested in mesocosms, although the extent to which such effects can be related to events in the natural environment is questionable. Although mesocosms have been developed by both industrial... 

Mikroreaktorenfur die chemische Synthese, Nachrichten aus der Chemie, May 2000 Chip technology initiates quest for small structures better temperature control on the small scale fast mixing by diffusion several kg productivity per day no novel, but better chemistry perfect control over process parameters corresponding increase in selectivity basic micro-reactor functions selected examples of use micro reactors as routine tools in the laboratory first start-up companies [113],... 

It is hoped the following chapters will inspire and provide some answers to these important questions, as well as further define the role of the dendritic state in the quest for higher, structure controlled, molecular complexity. 

Questing control of chemical reactors. Paper presented at the Annual Meeting of the American Institute of Chemical Engineers, Mexico City, October 1966. 

Studies in optimization-VIII Questing control of a stirred tank reactor (with R.N. Schindler). Chem. Eng. ScL 22, 319-336 (1967). 

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