A method is described for analyzing the diffusion of sci-were published in a biochemistry instead of a mathematics entific journals, using the Rasch model as the measuring journal, it would have a greater popularization because instrument. It is applied to the 10-year distribution of the biochemistry community is more numerous than the citations to journals of the Subject Category ''Physics'' mathematical community. But it might have less diffusion by year of publication of cited articles with data obtained as lacking in interest for biochemists to use in their work, from the SCI Journal Citation Reports of ISI for the year 1994. Diffusion in a scientific field would be regarded and would generate no citations. On the contrary, if it as the dissemination of knowledge, channeled through were published in a mathematics journal, it would be less citations that are distributed over different periods of popular in the sense that the number of potential readers time and propagated by means of scientific journals: would be smaller, but it would have greater diffusion here it is considered to be a latent variable defined by a because it would be more likely to arouse interest amongst particular set of items (the citations made in different time periods), and the Rasch model is used as an instruits readers, and be of possible use in their own work, and ment for measuring that variable.
hence, generate citations.
In this sense, the citations that occur over a period of years are the agents of the diffusion of knowledge that is