Showing papers by "Ora Kedem published in 1999"
TL;DR: In this paper, a simple grafting procedure was developed for surface modification of commercial polyamide reverse osmosis membranes and the modifications were monitored by spectral analysis, which resulted in drastic decrease in contaminant adsorption for some polymer grafts.
38 citations
30 Dec 1999
TL;DR: It is shown that catalytic closure can sustain self replication up to a critical dilution rate, related to the extent of mutual catalysis, and the capacity for self replication in a mutually catalytic set is shown to be a graded property, quantitated by a critical parameter (lambda) ci.
Abstract: The Graded Autocatalysis Replication Domain (GARD) model described here depicts an early primordial scenario, prior to the emergence of biopolymers, such as RNA or proteins. The model describes, with the help of statistical chemistry computer simulations, a collection of organic molecular species capable of rudimentary selection and evolution. The GARD model provides a rigorous kinetic analysis of simple sets of chemicals that manifest mutual catalysis. It is shown that catalytic closure can sustain self replication up to a critical dilution rate, related to the extent of mutual catalysis. The capacity for self replication in a mutually catalytic set is shown to be a graded property, quantitated by a critical parameter (lambda) ci. GARD could be a simple model for a primordial scenario, in which replication and catalysis are performed by the same set of molecules.© (1999) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
2 citations