Microcosm definition

Piwoni MD, Wilson JT, Walters DM, et al. 1986. Behavior of organic pollutants during rapid-infiltration of wastewater into soil. I. Processes, definition, and characterization using a microcosm. Haz Waste Haz Mat 3 43-55. 

Apply the microcosmic bead test If a skeleton bead is obtained, silica or a silicate is indicated. A negative result does not definitely prove that silica or a silicate is absent, as a skeleton is not always formed. The silicon tetrafluoride test should then be employed (Section IV.26, reaction 6). 

PmCl3.xH20, Pm(N03)3.xH20, and Pm(C2O4)3.10H2O. It would be expected that promethium would form some stable compounds in the +2 oxidation state, though they are unlikely to be made in aqueous solution. No definite evidence has yet been obtained, since studies have been hindered both by the small quantities of the element available and by its radioactivity. The properties of promethium fit neatly into position between neodymium and samarium it is a microcosm of lanthanide chemistry in general. 

The alchemist... knew definitely that as part of the whole he had an image of the whole in himself... This interior microcosm was the unwitting object of alchemical research. Today we would call it the collective unconscious, and we would describe it as "objective" because it is identical in all individuals and is therefore one. Out of this universal One there is produced in every individual a subjective consciousness, i.e., the ego.4... 

Microcosms can be defined as controlled, reproducible laboratory systems that attempt to simulate the situation in a portion of the real world , while mesocosms are manmade, surrogate ecosystems that can be used to assess the fate and effects of chemicals at many different levels of biological organization . Mesocosms are bounded, and partially enclosed outdoor experimental systems that fall, in complexity, between laboratory microcosms and the real world macrocosm . The definition of a mesocosm has been refined further as a physically confined multitrophic... 

This analysis demonstrates that the microcosm provides distribution data that is consistent with what might be predicted on the basis of the relevant properties of the compounds, although the data do demonstrate that even the location of the label can have a significant effect. More definitive information could be generated by chemical... 

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