Dynamic partitioning

Fig. 13. Thermo dynamic partitioning coefficient for ammonium chloride (8).

Where Western science has heretofore been predicated on (1) static partitions of S2 (modulo our co-evolved senses and language), and (2) simple, linear chains of cause o effect, the generalized CA-based physics represents a paradigm shift to (1) causal webs, and (2) fully coevolving object interaction hierarchies and dynamic partitions. 

Cohen Y, Tsai W, Chetty SL, Mayer GJ (1990) Dynamic partitioning of organic chemicals in regional environments a multimedia screening-level modeling approach. Environ Sci Technol 24 1549-1558... 

Tsai, W., Cohen, Y., Sakugawa, H., Kaplan, I.R. (1991) Dynamic partitioning of semivolatile organics in gas/particle/rain phases during rain scavenging. Environ. Sci. Technol. 25, 2012-2023. 

In principle, chemical information on a system can only be obtained with methods that do not alter the species present in solution. However, in order to get this information, an external perturbation must be applied to the system and its response must be analyzed. In the case of radioactive tracer, where the radioactivity measurement is the only way to detect the element (but it does not allow the identification of the form of the species), two types of external perturbation can be applied (i) by contacting the system with a second phase and subsequently observing the distribution of the radionuclides between the two phases (static or dynamic partition) or (ii) by applying an electrical potential or a chemical gradient (transport methods). So far, transport methods have not yet been used in one-atom-at-a-time... 

Partitioning is the first and probably the simplest model of the retention mechanism. It assumes the existence of two different phases (mobile and stationary) and instant equilibrium of the analyte partitioning between these phases. Simple phenomenological interpretation of the dynamic partitioning process was also introduced at about the same time. Probably, the most consistent and understandable description of this theory is given by C. Cramers, A. Keulemans, and H. McNair in 1961 in their chapter Techniques of Gas Chromatography [12]. The analyte partition coefficient is defined as... 

Third, the stationary phase should permit separate elution of the substances into the mobile phase and the selectivity toward samples of interest has to be sufficient to lead to separations with good resolution. The selectivity of solvent systems can be estimated by determination of the partition coefficients for each substance. The batch partition coefficients D are calculated as the ratio of the component concentration in the organic phase to that in the aqueous phase. The dynamic partition coefficients of compounds are determined from an experimental elution curve [7]. Several solvent systems for organic separation were investigated [4-8]. The most efficient evolution usually occurs when the value of the partition coefficient is equal 1. However, in some CCC schemes, the best results are obtained with lower partition coefficient values ofO.3-0.5 [1,4]. 

The taxonomy matching system AnchorFlood implements a dynamic partition-based matching that avoids the a-priori partitioning of the ontologies (Hanif and Aono 2009). It also utilizes anchors (similar concept pairs) but takes them as a starting point to incrementally match elements in their structural neighborhood until no further matches are found or all elements are processed. Thus the partitions (called... 

H. Gang, D. D. Brace, M. D. Fayer, Dynamic partitioning of an aromatic probe between the headgroup and core regions of cationic micelles, J. Phys. Chem. B, 2001, 105, 10007-10015. 

Fig. 1 Pictorial representation of the dynamic partitioning using the seed atom method for the F( P) -I- squalane reaction...

The dynamic partitioning of the reactions into fast and slow reactions is done due to the reaction velocity and the actual stepsize by looking at the test equation... 

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