title: Limits of the Classical Concept of Concentration.
abstract: Solutions of very low concentrations cannot be treated by the usual concept of concentration. Stochastic calculations are performed for the analysis of such solutions containing one or a few molecule(s). It is concluded that these systems escape the usual concentration parameters. Two "case histories" are also shown for demonstration of the practical consequences of the theoretical analysis.
authors.affiliation: Department of Mathematics, University of Modena and Reggio Emilia , Via Campi 213/B, I-41125 Modena, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Maioli
authors.affiliation: Inpellis, Inc. , 100 Cummings Center, Suite 243C, Beverly, Massachusetts 01915-6133, United States.
authors.forename: Gyula
authors.initials: G
authors.lastname: Varadi
authors.affiliation: Institute of Environmental Engineering, University of Pannonia , Egyetem u. 10, H-8200 Veszprém, Hungary.
authors.forename: Róbert
authors.initials: R
authors.lastname: Kurdi
authors.affiliation: Department of Chemistry and Technology of Biologically Active Compounds, University "La Sapienza"-Roma , P.le A. Moro 5, I-00185 Roma, Italy.
authors.forename: Luciano
authors.initials: L
authors.lastname: Caglioti
authors.affiliation: Department of Life Sciences, University of Modena and Reggio Emilia , Via Campi 103, I-41125 Modena, Italy.
authors.forename: Gyula
authors.initials: G
authors.lastname: Pályi