Certain long molecules can be regarded as linear arrays of chemically active sites. During chemical reaction, adjacent groups of sites may link to form dimers, trimers, etc. This paper considers the case when all such...
详细信息
Certain long molecules can be regarded as linear arrays of chemically active sites. During chemical reaction, adjacent groups of sites may link to form dimers, trimers, etc. This paper considers the case when all such groups are unstable, and gives equilibrium distributions for the composition of the molecules as functions of the rates of formation and decay of the linked groups.
Single crystals of NaCl, of known surface dislocation substructures and containing precipitate particles of Na2SO4 approximately 10μm in diameter, were subjected to hydrostatic pressures in the range 1 to 10 kbars an...
详细信息
Single crystals of NaCl, of known surface dislocation substructures and containing precipitate particles of Na2SO4 approximately 10μm in diameter, were subjected to hydrostatic pressures in the range 1 to 10 kbars and subsequently re-etched at atmsopheric pressure. Rearrangement and nucleation of dislocations in the vicinities of the precipitates was observed to result from pressurisation treatments above 3 kbars. After pressurisation at 8 and 10 kbars the dislocation groups were in general complex; linear arrays on 〈110〉 {110} and “rosettes” were, however, observed. The observations are discussed in terms of recent theories (developed for metal matrices) of generation of dislocations at misfitting particles and are in fair agreement with the model of Ashby and Johnson.
Beginning with sets of arbitrary elements, concepts of distance and betweenness of sets are defined. Since betweenness as defined is not transitive, an investigation is made of the conditions which ensure desirable re...
详细信息
Beginning with sets of arbitrary elements, concepts of distance and betweenness of sets are defined. Since betweenness as defined is not transitive, an investigation is made of the conditions which ensure desirable regularity. It is found that a straight line or linear array of sets is a generalization of nested sets (Guttman scales). Close relationships among the notions of distance, betweenness, and linear arrays are demonstrated. Parallel and perpendicular arrays, dimensions, and multidimensional spaces are characterized.
暂无评论