By Aharon Katzir-Katchalsky

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Molekulare Pharmakologie und Toxikologie: Biologische Grundlagen von Arzneimitteln und Giften

Wie wirkt ein Medikament oder ein present in der Zelle? Thomas Efferth spannt einen Bogen von den allgemeinen Grundlagen der Pharmakologie und Toxikologie zu den molekularen Wirkmechanismen der wichtigsten Medikamente und Gifte. Aktuelle Themen wie Gentherapie, Immuntherapie und Stammzelltherapie behandelt er ebenso wie Pharmakogenetik und –genomik oder systembiologische Ans?

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11. Fuoss, R . M . , and Strauss, U. , Ann. N. Y. Acad. , 51, 836 (1949). 12. , unpublished results. 13. D o b r y , A . , J. chim. , 47, 402 (1950). 14. , Fitzgerald, N . , and Fuoss, R . M . , J. Am. Chem. , 72, 1864 (1950). 14a. , Nature, 167, 159 (1950). 15. , unpublished results. 16. Katchalsky, A . , Bull. Israeli Res. Council, in press. 17. Wall, F. T . , and de Butts, E. , J. Chem. , 17, 1330 (1949). 18. Overbeek, J. T h . , Bull. soc. chim. , 57, 252 (1948). 19. , Rec. trav. , 68, 879 (1949).

A cycle has been analyzed in which a system is made to work between t w o p H values (corresponding to chemical potentials), and two degrees o f ionization, under the influence of an exterior force. Resume Le comportement de molecules poly&ectrolytiques en solution aqueuse a ete discute. II a ete montre que l'acroissement considerable de viscosite des acides polymeriques du fait de leur ionisation est du a des modifications de forme moleculaire, causees par des forces de repulsion electrostatique.

The free energy change o f the system is given b y : dF = VdP - SdT - fdh + WW (27) where \f/ is the potential of the molecule. T h e force which is defined as positive for compression is evidently given b y : / - (28) -(<*F/bh) , P>t tT Now, the free energy of the molecular system is given (c/. Part II) b y : nF = n[F(v) + F + kT j> 0 "(MCOO- — MCOOH) (29) Fo comprises the entropy o f the configurational arrangements: (kT/A)fpdh where /3 is the inverse Langevin function of the argument h/NA and is equal, for slightly extended molecules, t o 3h/NA.

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