High Quality Content by WIKIPEDIA articles! Quantitative structure-activity relationship (QSAR) (sometimes QSPR: quantitative structure-property relationship) is the process by which chemical structure is quantitatively correlated with a well defined process, such as biological activity or chemical reactivity For example, biological однюя activity can be expressed quantitatively as in the concentration of a substance required to give a certain biological response Additionally, when physicochemical properties or structures are expressed by numbers, one can form a mathematical relationship, or quantitative structure-activity relationship, between the two The mathematical expression can then be used to predict the biological response of other chemical structures.  Session2010 г Мягкая обложка, 72 стр ISBN 6130499159.