Marc-Olivier Coppens and Bharat Bhushan introduce the Molecular Systems Design & Engineering themed issue on nature-inspired solutions for engineering.

African trypanosomes offer a unique system in which to study the structure, function, regulation, and evolution of the endosomal and lysosomal system. All components of this system are more active in bloodstream forms (BF) that parasitize humans and other mammals than in procyclic forms that develop in tsetse flies (Langreth and Balber, 1975; Pamer et al., 1989; Webster and Fish, 1989; Mbawa et...

Relativistic wave functions for elements with Z = 37-54 [Su & Coppens (1998). Acta Cryst. A54, 646-652] have been fitted with a linear combination of Slater-type functions as defined by Bunge, Barrientos & Bunge [At. Data Nucl. Data Tables (1993), 53, 113-162], for use in charge-density analysis and other applications. In addition, numerical relativistic wave functions have been calculated for ...

References 1. Stoimenova, B.D. (2007). The Effect of Myopia on Contrast Thresholds. Invest. Ophthalmo. Vis. Sci.,48 (5), 2371‐2374 2. Westheimer, G. (2003). Visual acuity with reversed contrast charts: I. Theoretical and psychophysical investigation. Optom. Vis. Sci. 2003. 80(11), 745‐748 3. de Wit, G.C. & Coppens, J.E. (2003). Stray light of spectacle lenses compared with stray light in the ey...

1. Introduction Gas diffusion in mesoporous media is often in the Knudsen regime, cross sections of the pores being considerably smaller than the intrinsic molecular mean free path. Coppens [1] predicted the effect of fractal wall roughness on Knudsen self-diffusivity K D in a channel. A " trapping " process was identified as the cause of reduction of

The atoms in molecules (AIM) theory may be used to derive atomic charges, atomic volumes and molecular dipole moments from the charge density. The theory is applied to theoretical periodic Hartree-Fock (PHF), density-functional (DFT) and experimental X-ray densities of p-nitroaniline using the program TOPOND and a newly developed program, TOPXD, for topological analysis of densities described b...

Structure factors based on periodic density-functional (DFT) calculations on 25 molecular crystals have been used to evaluate trends in refined values of the kappa and kappa' expansion-contraction parameters of the Hansen-Coppens multipole formalism. As found previously and expected physically, the spherical-valence-shell kappa parameters are closely related to the net atomic charges, negative ...

M. COPPENS ,* A . J . M . SCHRE I J ER ,* F . H . BERGER , S . C . CANNEGIETER , F . R . ROSENDAAL § and H . R . B Ü LLER* *Department of Vascular Medicine, Academic Medical Center, Amsterdam; Department of Clinical Epidemiology, Leiden University Medical Center, Leiden; Department of Radiology, Academic Medical Center, Amsterdam; and §Department of Thrombosis and Haemostasis, Leiden University...