tical Biosciences s & an international journal Volume 110 June 1992 MONIQUE VASSEUR, GUY VAN MELLE, REGINE FRANGNE, AND FRANCISCO ALVARADO (Meudon, France) A Four-Proton-Families Model for pH-Dependent Enzyme Activation: Application to Intestinal TIT ee PR Pe ee Jia Li (Los Alamos, New Mexico) Periodic Solutions of Population Models in a Periodically Fluctuating Environment ...................... DAGAN FENG (Sydney, Australia) AND JosEPH J. DisTEFANO III (Los Angeles, California) Decomposition-Based Qualitative Experiment Design Algorithms for a Class of ee ee ee ee ee MICHAEL G. NEUBERT AND Mark Kort (Seattle, Washington) The Subcritical Collapse of Predator Populations in Discrete-Time Predator-Prey Models .................... Jacques A. L. SILVA AND THOMAS G. HALLAM (Knoxville, Tennessee) Compensation and Stability in Nonlinear I CR a i ae Pe Gy ne GILA FRUCHTER AND SHLOMO BEN-HAIM (Haifa, Israel) Dynamic Properties of Cardiovascular Systems ............... NOTES JIAO ZHAORONG, KENAN M. MATAWIE, AND Criype A. McGiLcurist (New South Wales, Australia) Variance Components for Discordances.................00005 L. TuryYN (Dayton, Ohio) Remarks on ‘‘Persistence in Models of Three Interacting Predator-Prey Populations’’ .................... EDWARD H. KapLan (New Haven, Connecticut) Ro Bounds for Worst-Case Endemic Mixing Models ............ Book REVIEWS RICHARD GOMULKIEWICZ (Lawrence, Kansas) Seatistionl Gometics (Prem Maseim) .. ow cccc cccc cc csees Spiro E. STEFANOU (University Park, Pennsylvania) Mathematical Bioeconomics: The Optimal Management of Renewable Resources (Colin W. Clark) ................ JONATHAN BELL (Buffalo, New York) AND MARK Ho.MEs (Troy, New York) Model of the Dynamics of Receptor Potential in eh dh, ene Sh en oa Pee bhO Ks eee ee eens GERHARD CZIHAK AND JOHANN LINHART (Salzburg, Austria) Computer Modeling of Pole Formation in Cell Division .................. R. C. YADAVA (Varanasi, India), A. PANDEY (Bombay, India), AND N. C. SAXENA (New Delhi, India) Estimation of Parity Progression Ratios from the Truncated Distribution of Closed and Open Birth Intervals ...................00-. Joni A. ToRSELLA (Charleston, South Carolina), KENNETH M. Pruitt (Birmingham, Alabama), AND CHAN F. Lam (Charleston, South Carolina) A Method for the Analysis of Biological ee FO ee kaw as oe ok whee 6 08 ee bk R. B. Martin, M. E. FisHer, R. F. MINCHIN, AND K. L. Teo (Nedlands, Australia) Optimal Control of Tumor Size Used to Maximize Survival Time When Cells Are Resistant to Chemotherapy ...................0.. R. B. Martin, M. E. FisHer, R. F. MINCHIN, AND K. L. Teo (Nedlands, Australia) Low-Intensity Combination Chemotherapy Maximizes Host Survival Time for Tumors Containing Drug-Resistant Cells ............... ROGER ARDITI AND BERNARD DACOROGNA (Lausanne, Switzerland) Maximum Sustainable Yield of Populations with rn . id a5 6 Wak ew bie Daas hae Fab eae koe ks VOLUME CONTENTS